Archive for the ‘Themed Issues’ Category

The carbon‒metal bond and C‒H metalation: In celebration of the career of William C. Kaska

This themed collection on the carbon‒metal bond and C‒H metalation is devoted to the career of Professor William (Bill) Kaska, who will celebrate his 80th birthday on May the 13th, 2015. Bill was a faculty member at The University of California at Santa Barbara for the entirety of his 41-year independent career (1964‒2004). During this time, he supervised many graduate students and post-doctoral scholars, a large number of whom are active in teaching, research, and in industry positions today.

Professor William (Bill) Charles Kaska

Professor William (Bill) Charles Kaska

Throughout his career, Bill has been a true pioneer and adventurer in organometallic chemistry, bearing the innate synthetic flair and expertise to make unusual molecules where others had tried and failed. He has made several important (and perhaps under-recognized) impacts in the field of metal-mediated C‒H activation, as well as in several other areas of organometallic chemistry (see below). Perhaps most notably, Bill was one of the first researchers to realize the power of C‒H bond metalation using transition metals and his early work demonstrated some of the first reported instances of such chemistry.

During his career, Bill collaborated with many groups around the World, and was a visiting scientist at Monsanto in Zurich, at the Universities of Cambridge, Erlangen, Tübingen and Utrecht, and at the Max-Planck Institute in Mülheim. We celebrate the achievements of Bill, his mentors and co-workers in this themed collection: the publications kindly dedicated to this celebratory themed collection serve to illustrate how far the field has come since the publication of a number of seminal results over 40 years ago.


Beginnings

Bill Kaska was born, raised and educated in Ancón, a suburb of Panama City, located in the then U.S.-controlled Canal Zone. He graduated from Loyola University in Los Angeles in 1957 and subsequently joined the group of Professor John J. Eisch at St. Louis University. Eisch had just returned to the United States from a post-doctoral position with Professor Karl Ziegler in Mülheim, Germany. Bill was one of Eisch’s first graduate students, charged with the task of investigating the then unexplored reactivity of alkyl and aryl aluminium compounds with unsaturated systems as alternatives to alkyl lithium reagents. Two years later, the Eisch group moved to The University of Michigan in Ann Arbor, and it was around this time that Kaska and Eisch published the first bona fide example of sp2 C‒H metalation using triphenyl aluminium.

After graduating from Michigan in 1963, Bill studied organoboron and organoberyllium compounds as a post-doctoral scholar in the laboratory of Professor Thomas Wartik at Penn State University. He was hired only one year later as an assistant professor at the newly-formed University of California at Santa Barbara, in the fall of 1964.

Notable contributions

The training Bill had gained during his formative graduate and post-doctoral years set him on the path to become a die-hard synthetic organometallic chemist; the type that refuses to believe that any structure that can be imagined and scribbled on the back of an envelope cannot also be made and isolated…somehow.

In his early years in Santa Barbara, Bill presented the first example of an organometallic Wittig reaction, demonstrated by the reaction of MnBr(CO)5 with (Ph3P2)C to afford a Mn=C=C=PPh3 ylide. Bill and his group later used (Ph3P)2C to prepare several other examples of acetylenic organometallic complexes. Notably, in a 1974 collaborative paper with R. F. Reichelderfer, it was shown that treatment of (COD)IrPF6 with (Ph3P)2C resulted in the oxidative addition of an sp3 C‒H bond of the coordinated cyclooctadiene ligand directly to the metal centre. This was the first example of a C‒H bond insertion of a coordinated ligand by a transition metal; it was not until the following decade that elegant work by Crabtree and several others elevated the profile of this powerful reaction type.

The hexaphenylcarbodiphosphorane species (Ph3P)2C used in Bill’s early chemistry had been discovered a decade earlier by Ramirez. The compound itself was found to exhibit triboluminescence, the mechanism and origin of which was not well understood at the time. Large yellow crystals of (Ph3P)2C grown from diglyme were found to emit a bright yellow-green light when touched. In 1977, Bill published a paper in collaboration with Jeffrey Zink (UCLA) that presented a detailed spectroscopic analysis of (Ph3P)2C and other aromatic triboluminescent materials. The conclusions of this study suggested that light emission was caused by a combination of frictional electrification, piezoelectrification, and internal electrification at shear planes within individual crystals.

In the late 1970s, Bill and his group had gained an interest in the use of what would come to be known as pincer ligands for the formation of coordinatively unsaturated complexes with bulky groups around the metal atom, as a way to promote C−H metalation of hydrocarbons. In 1980, at the Biennial Inorganic Chemistry Symposium in Guelph, Canada, Bill presented the X-ray structure and reactivity of a 14-electron Rh(I) PCP-pincer complex. The dehalogenated Rh(I) centre readily formed adducts with both aromatic and aliphatic hydrocarbons. The subsequent publication of this work included Craig Jensen as a co-author (now on the faculty at the University of Hawaii), who was an undergraduate student in Bill’s group at that time. A number of additional reports of the reactivity of other pincer complexes were published by Bill’s group shortly after, and this body of work forms an integral part of the early history of pincer chemistry.

For the next two decades, Bill worked alongside other major researchers, notably including Alan Goldman (Rutgers) and Gerard van Koten (Utrecht University) to further advance the chemistry of pincer complexes, which continues to attract significant attention to this day. The utility of pincer catalysts continues to break new ground. In 2001, the Kaska group published a communication in collaboration with Michael Hall (Texas A&M University) and Matthias Haenel (Max-Planck Institute) showing how a PCP-Ir(I) complex constructed using an “anthraphos” (1,8-substituted anthracene) ligand led to a thermally stable catalyst for alkane dehydrogenation.

In the later phase of Bill’s career, he gained an interest in the synthesis of proton sponge materials and super bases, using fused N-heterocyclic ligands based on quino[7,8-h]quinolines. In collaborative work with his long-time colleague at UCSB, Galen Stucky, and Ferdi Schüth (Max-Planck Institute), the first examples of transition metal coordination complexes of these so-called proton sponges were reported in 2001. These complexes were unusually thermally and chemically stable, due to the unique conformational bending of the qunioline backbone.

Over the past five decades, the Kaska lab has produced many highlight results in a number of fields of molecular inorganic chemistry. The works contributed to this celebratory compilation build upon the legacy of Bill Kaska’s work, his teaching, and his friendships with others in the community.

Articles in this themed collection

While this narrative is intended to summarise just a few of the highlights of Bill’s research career, his former Ph.D. mentor John Eisch has authored a terrific editorial entitled, “Emergence of electrophilic alumination as the counterpart of established nucleophilic lithiation: an academic sojourn in organometallics with William Kaska as a fellow traveler,” which provides a comprehensive, personal account of their seminal work in organoaluminium chemistry.

Research in the arena of C‒H bond activation has continued to attract much interest. This interest is driven not only by a fundamental curiosity to discover new chemical reactivity, but also to solve important energy-related problems involving hydrocarbon activation, in drug development, and in a host of other homogeneously-catalysed processes. This is abundantly clear from the new work on display in this themed collection.

In close relation to some of the seminal work published by Bill and his co-workers on the reaction chemistry of Group 9 PCP-pincer complexes, this themed collection features new work by Professors Alan Goldman, Karsten Krogh-Jesperson (University of Rochester) and co-workers, who present an elegant combined experimental and theoretical study of the C‒H versus C‒C bond activation selectivity observed between a PCP-Ir catalyst and biphenylene. They describe how and why biphenylene tends to initially undergo C‒H oxidative addition to the PCP-Ir centre, but upon heating can undergo a rearrangement that results in C‒C activation to yield a less sterically-hindered, cyclometallated species.

A collaborative experimental and theoretical study of an unusual PCP-Ir system is reported by the groups of Professors Johannes Wielandt (Karl-Franzens University) and Hermann Mayer (University of Tuebingen). They employ a cycloheptatriene-based PCP ligand scaffold; cyclometallation of this ligand with Ir(CO)3Cl requires activation of an sp3 C‒H bond. Upon standing in tetrahydrofuran, the complex undergoes isomerisation via transfer of the remaining sp3-H onto the ligand backbone. This results in three new isomers, each containing a more common sp2-metalated arrangement at Ir, and a partially saturated ligand backbone. Continuing the theme of cyclometallated Ir-based complexes, Professors Roy Periana, Brian Hashiguchi and co-workers from the Scripps Research Institute describe the use of a robust NNC-Ir complex that is active for the oxidation of methane, benzene and other hydrocarbons in the presence of trifluoroacetic acid.

Professor Gerard van Koten and co-workers describe a series of new NCN-Pt pincer complexes that feature 4-(E)-[(4-R-phenyl)imino] methyl substituents, which induce important electronic effects on the Pt(II) sites. A combination of multinuclear NMR studies have been used to elucidate the electronically-tuneable behaviour of this unique family of Pt-pincer complexes. The group of Professor Paul Hayes at the University of Lethbridge describe how Y and Sm complexes of their bis(phosphinimie) carbazolate and pyrrolate NNN-pincers undergo varying patterns of ortho-metalation toward N- and P-aryl substituents accompanied by reductive elimination of silanes.

This collection also features a number of examples of complexes based on neutral pincer ligands that display a range of C‒H bond activation reactivities. Professor Dan Mindiola and his team at the University of Pennsylvania present a PNP-Ti pincer complex capable of performing catalytic dehydrogenation of cyclic and linear alkanes to cleanly yield the corresponding alkenes. They elucidate a mechanism for this surprising reactivity, which involves the formation of a Ti(III) alkylidyne intermediate that can effect a double C‒H bond activation. The group of Professor Karen Goldberg at the University of Washington present the synthesis, structures and reactivities of PtMe2 complexes of a bidentate P(X)N ligand (X = O, NH). The N-donor pyridyl substituent is sufficiently hemilabilile to allow for cyclometallation and reductive elimination of CH4. Professor Michael Rose and his team at the University of Texas at Austin present a family of Mn-carbonyl complexes prepared using novel neutral NNS Schiff base ligands, in which the thioether-S donors also exhibits hemilability.

C‒H activation by early transition metal complexes also features in this collection; Professors John Arnold and Robert Bergman from the University of California demonstrate the cyclometallation of a (BDI)Ta(=NtBu)Me2 complex, which undergoes reaction with H2 gas to provide a dihydride intermediate by sigma-bond metathesis. Interestingly, a low-valent Ta(III) species is also generated under certain conditions, which undergoes C‒N bond cleavage of the BDI ligand to give a new Ta(V) cyclometallated species. Meanwhile, Professor Gerhard Erker and co-workers report the reaction of B(C6F5)3 toward zirconacycloallenoids. They show how strongly Lewis basic B(C6F5)3 species undergo insertion into the Zr metallacycles to give unusual zwitterionic allenyl/borate complexes.

Professor Manuel Soriaga and co-workers from Texas A&M University and the California Institute of Technology provide an example of heterogeneous C‒H bond activation and metalation, performed on solid Pd electrode surfaces. In this interesting and extensive study, high-resolution surface-sensitive techniques are combined with DFT calculations to elucidate the mechanism of metalation of 2,3-dimethylhydroquinone on ordered Pd(111) and polycrystalline Pd electrode surfaces. It is shown that the orientation of the quinone (side-on, or flat) as it undergoes oxidative chemisorption to the Pd surfaces is directly related to the relative quinone concentration.

Professor Carl Redshaw and collaborators from the Universities of Hull, Loughborough and East Anglia present the use of a family of new mono-, di- and tri-nuclear Zn(II)-calixarene complexes for the ring-opening polymerization of lactones and lactides. The group of Professor Dominic Wright at the University of Cambridge (where Bill Kaska spent a sabbatical in 2004) present the synthesis and crystal structures of an extended family of new ML2 sandwich complexes (M = Ca(II), Mn(II), Fe(II)), using a tripodal NNN monoanionic donor ligand (L = tris(2-pyridyl)aluminate).

The themed collection is nicely concluded by work from the group of Professor Bruce Lipshutz – a long-time friend and colleague of Bill Kaska in the Department of Chemistry & Biochemistry at UC Santa Barbara – who report the Cu(OAc)2-catalysed hydrophosphination of styrenes. Notably, this powerful organic conversion has been achieved under green conditions using water as the solvent, at room temperature; the reaction proceeds in high yield for a broad range of aromatic substrates.

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Workshop on Flexibility and Disorder in Metal–Organic Frameworks

The Workshop on Flexibility and Disorder in Metal–Organic Frameworks will take place in Paris, France, from 3-5 June 2015.

Workshop on Flexibility and Disorder in Metal–Organic FrameworksOrganised by Anthony Cheetham (FRS), Alain Fuchs, Thomas Bennett, and François-Xavier Coudert, with funding from the European CECAM, as well as the French CNRS and Chimie ParisTech, this workshop will gather together distinguished speakers from a diverse range of disciplines to provide numerous viewpoints on topics including:

  • The Mechanical Behavior of MOFs
  • Amorphization and Nanostructures
  • Computational Approaches to Flexbility and Disorder
  • Defects and Disorder as Virtues

Further detail on the workshop’s aims and topics can be found here

Interested in this subject area? Submit your work to the Dalton Transactions themed issue on Flexibility and Disorder in Metal-Organic Frameworks: See our Call for papers and contact us for more information

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A collection of papers in memory of Lord Jack Lewis

We are very pleased to announce the launch of a commemorative article collection in memory of Lord Jack Lewis.

Lord Jack Lewis, who recently died aged 86, was the 1970 Inorganic Professor at Cambridge for 25 years from 1970 to 1995. Highly energetic and extremely talented, he was among a small band of pioneers who revolutionised inorganic chemistry and must be regarded as one of the true founding fathers of the modern field. As a tribute to Jack, Brian F. G. Johnson, William. P. Griffith, Robin J. H. Clark, John Evans, Brian H. Robinson and Paul R. Raithby have chosen a selection of his papers that they feel demonstrate Jack’s interest and contribution to inorganic chemistry over the course of his career, introducing them in a special Editorial in Dalton Transactions.

We very much hope that you will enjoy this commemorative article collection.

To access all of the Lewis articles and the Editorial, go to: http://rsc.li/lewis.

Lord Jack Lewis

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Call for papers: 2015 themed issues

Dalton Transactions coverWe are delighted to announce four new Dalton Transactions themed issues to be published in 2015:

Perovskites
Guest Editors: Professors Russell Morris, Philip Lightfoot (both University of St. Andrews) and J. Paul Attfield (The University of Edinburgh)
Deadline: 16th December 2014

Earth Abundant Element Compounds in Homogeneous Catalysis
Guest Editors: Professors Philip Mountford (University of Oxford), Laurel L. Schafer (University of British Columbia) and Warren E. Piers (University of Calgary)
Deadline: 14th January 2015

New Talent Asia
Guest Editor: Professor Hiroshi Nishihara (The University of Tokyo)
Deadline: 24th February 2015

Fluorine
Guest Editor: Professor Jennifer Love (University of British Columbia)
Deadline: 29th May 2015

Does your research fit into any of these subject areas? If so, we would welcome your contribution. For further details on issue scopes and on how to submit, see below:

How to submit

All types of manuscript – communications, full papers and Perspectives, will be considered for publication. The manuscript should be prepared according to our article guidelines and submitted via our online system.

All manuscripts will be subject to normal peer review and inclusion in the themed issue will be at the discretion of the Guest Editors. Please indicate in your submission which themed issue you would like to be considered for.

Issue scopes

Perovskites
This issue will focus on functional perovskites from the inorganic chemist’s perspective. It will include, but is not limited to: experimental studies on the synthesis, structure and physical/chemical properties of perovskites; chemistry-structure-property relationships; and the design and understanding of perovskite structure and functionality from a theoretical/computational perspective. Contributions are not limited to ‘classical’ inorganic perovskites but can also include hybrid perovskites, ‘MOF’ perovskites, layered perovskite families and related phases (eg. tungsten bronze types).

Earth Abundant Element Compounds in Homogeneous Catalysis
The aim of this themed issue is to showcase the latest research in the development of highly active and selective homogeneous catalysts utilizing earth abundant elements from across the Periodic Table. We believe this will reflect a recent trend in catalysis that seeks to find alternatives to catalysts based on precious metals like Ru, Rh, Pd, Ag, Re, Os, Ir, Pt, or Au and toxic elements like Hg, Bi, In and Pb. We are inviting contributions from researchers utilizing catalysts based on elements from both the s and p block, the more abundant first row transition metals and the lanthanides as catalysts for commodity chemical, fine chemical and polymer synthesis, to emphasise the broad range of activity in this area.

New Talent Asia
This themed issue will focus on all areas of inorganic and organometallic chemistry, inorganic materials science, bioinorganic chemistry and catalysis and aims to reflect the strength and vitality of new inorganic chemistry from the Asia-Pacific region.

Fluorine
This issue will focus on all applications of fluorine in inorganic chemistry. Topics include, but are not limited to: organometallic and coordination complexes using fluorinated ligands, metal-catalysed and metal-mediated fluorination and C–F activation reactions, main group fluoride compounds, solid state metal fluorides, molecular fluoride complexes and materials for fluoride sensing and anion binding. Synthetic, theoretical, catalytic and mechanistic studies will all be suitable, as will any relevant studies on material properties.

Interested in submitting  paper? Please contact us for more information

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Call for papers: 2014 themed issues

DaltonTransCoverWe are delighted to announce that Dalton Transactions will be publishing a number of themed issues in 2014. We want you to submit your work. If your research fits within the following themed issue topics, read on…

New Expeditions in Polar Organometallic Chemistry – deadline 1st April 2014

Inorganic Chemistry for Renewable Energy Conversion and Storage  – deadline 1st May 2014

Spectroscopy of Inorganic Excited States – deadline 14th May 2014

 Details of the scope of each issue is below.

How to submit?
All types of manuscript—communications, full papers and Perspectives, will be considered for publication. The manuscript should be prepared according to our article guidelines and submitted via our online system.

All manuscripts will be subject to the normal refereeing procedure and inclusion in the themed issue will be at the discretion of the Guest Editors. Please indicate in your submission that you would like the manuscript to be considered for this themed issue.

Issue scopes:

New Expeditions in Polar Organometallic Chemistry
Guest edited by Professor Eva Hevia (University of Strathclyde), this issue will focus on both the synthesis and characterisation of polar organometallic reagents and their application in organic synthesis, catalysis, supramolecular chemistry and materials science.

Inorganic Chemistry for Renewable Energy Conversion and Storage
Guest edited by Professor Lars Kloo (KTH), this issue will focus on all aspects of inorganic/organometallic materials and coordination chemistry of relevance for the conversion and storage of renewable energy. Contributions may include solar cells, solar fuels, fuel cells, batteries, or materials for energy storage; however, this list is by no means exhaustive – all subject areas within the title theme will be welcome!

Spectroscopy of Inorganic Excited States
Guest edited by Dr Julia Weinstein (Universityof Sheffield), this issue will focus on the state-of-the art in spectroscopic interrogation of inorganic excited states which apply the latest advances in detection technology.

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Advancing the Chemistry of the f-Elements

Now welcoming abstract submissions for Dalton Discussion 14 – Advancing the Chemistry of the f-Elements

28th – 30th July 2014, Edinburgh, UK

Confirmed speakers: Geoff Cloke, University of Sussex, UK
  Melissa Denecke, Karlsruhe Institute of Technology, Germany
  Laurent Maron, Université Paul Sabatier, Toulouse, France
  Jeffrey Long, University of California, Berkeley, USA
  Nik Kaltsoyannis, University College London, UK
  Marinella Mazzanti, CEA, Grenoble, France
  Paula Diaconescu, University of California, Los Angeles, USA
  Jonathan Lloyd, University of Manchester, UK

This Dalton Discussion aims to highlight the burgeoning role, and exciting prospects for f-elements in modern, metal-based chemistry. Abstracts for oral presentations must be sent in before 16th December 2013.

Authors of the selected oral abstracts will then be expected to submit their work as a full paper, which will form the basis of their short presentation at the Discussion meeting. The paper itself must contain new, unpublished work and be submitted for review to the Editorial Office of Dalton Transactions by 30th June 2014. At the conference, each author will be given approximately 5 minutes to summarise the key points of their paper in order to leave the majority of time open for discussion

This year, Dalton Discussion 14 is adopting a new process. Papers presented at Dalton Discussions will continue to be published in a dedicated themed issue of Dalton Transactions, however article peer-review will now take place after the Discussion. This means that speakers have longer to make the finishing touches to their article before the papers are made available online prior to the meeting.

To find out more about Dalton Discussion 14 and to submit your abstract, visit the dedicated webpage.

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Call for papers: 2014 themed issues

Dalton TransactionsWe are delighted to announce that Dalton Transactions will be publishing a number of themed issues in 2014. We want you to submit your work. If your research fits within the following themed issue topics, read on…

Organometallic and Coordination Derivatives of Nanocarbons –deadline 1st December 2013

Layered Inorganic Solids–deadline 15th January 2014

Synergy between Experiment and Theory–deadline 29th January 2014

 

Details of the scope of each issue is below.

How to submit?
All types of manuscript—communications, full papers and Perspectives, will be considered for publication. The manuscript should be prepared according to our article guidelines and submitted via our online system.

All manuscripts will be subject to the normal refereeing procedure and inclusion in the themed issue will be at the discretion of the Guest Editors. Please indicate in your submission that you would like the manuscript to be considered for this themed issue.

Issue scopes:

Organometallic and Coordination Derivatives of Nanocarbons
Guest edited by Professors Andrei Khlobystov and Andreas Hirsch, this issue focuses on the nanoscience and nanotechnology of inorganic and organometallic nanomaterials, including synthesis, structural and functional characterisation, and theory.

Layered Inorganic Solids
Guest edited by Professors Russell Morris, Jiri Cejka, Petr Nachtigall and Wieslaw Roth, this issue focuses on the experimental and theoretical aspects of the chemistry of layered materials.

Synergy between Experiment and Theory
Guest edited by Professor Eric Clot, this issue highlights the benefit of using simultaneous experimental and computational approaches to address a particular problem in inorganic or organometallic chemistry.

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Highlights from the upcoming Coordination Programming themed issue

We will shortly be publishing a themed issue titled “Coordination Programming: Science of Molecular Superstructures towards Chemical Devices” in Dalton Transactions. As a taster of what is coming, the following is a selection of articles from the issue that is recommended as HOT by our referees.


Relative anion binding affinity in a series of interpenetrated coordination cages
Marina Frank, Johannes M. Dieterich, Sabrina Freye, Ricardo A. Mata and Guido H. Clever

Dalton Trans., 2013, Advance Article
DOI: 10.1039/C3DT51709H, Communication

Relative anion binding affinity in a series of interpenetrated coordination cages


Guest responsivity of a two-dimensional coordination polymer incorporating a cholesterol-based co-ligand
Kazuki Kajitani, Tomomi Koshiyama, Akihiro Hori, Ryo Ohtani, Akio Mishima, Kohei Torikai, Makoto Ebine, Tohru Oishi, Masaki Takata, Susumu Kitagawa and Masaaki Ohba

Dalton Trans., 2013, Advance Article
DOI: 10.1039/C3DT51465J, Communication

Guest Responsivity of a Two-Dimensional Coordination Polymer Incorporating a Cholesterol-Based Co-Ligand


Programmed multiple complexation for the creation of helical structures from acyclic phenol–bipyridine oligomer ligands
Shigehisa Akine, Hiroki Nagumo and Tatsuya Nabeshima

Dalton Trans., 2013, Advance Article
DOI: 10.1039/C3DT51240A, Paper

Programmed multiple=


Plasmon-induced oxidation of gold nanoparticles on TiO2 in the presence of ligands
Yohei Konishi, Ichiro Tanabe and Tetsu Tatsuma

Dalton Trans., 2013, Advance Article
DOI: 10.1039/C3DT51495A, Paper

Plasmon-induced oxidation of gold nanoparticles on TiO2 in the presence of ligands


Programming MOFs for water sorption: amino-functionalized MIL-125 and UiO-66 for heat transformation and heat storage applications
Felix Jeremias, Vasile Lozan, Stefan K. Henninger and Christoph Janiak

Dalton Trans., 2013, Advance Article
DOI: 10.1039/C3DT51471D, Paper

Programming MOFs for water sorption: Amino-functionalized MIL-125 and UiO-66 for heat transformation and heat storage applications


Ternary metal Prussian blue analogue nanoparticles as cathode materials for Li-ion batteries
Masashi Okubo and Itaru Honma

Dalton Trans., 2013, Advance Article
DOI: 10.1039/C3DT51369F, Communication

Ternary metal Prussian blue analogue nanoparticles as cathode materials for Li-ion batteries


A bis(terpyridine)iron network polymer on carbon for a potential energy storage material
Kuo-Hui Wu, Hiroaki Maeda, Tetsuya Kambe, Ken Hoshiko, Eunice Jia Han Phua, Ryota Sakamoto and Hiroshi Nishihara

Dalton Trans., 2013, Advance Article
DOI: 10.1039/C3DT51186C, Communication

A bis(terpyridine)iron network polymer on carbon for a potential energy storage material

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Dalton Discussion 14 – Advancing the chemistry of actinides

Now welcoming abstract submissions for Dalton Discussion 14 – Advancing the Chemistry of Actinides

16th–18th September 2013, Edinburgh, UK

Confirmed speakers: Geoff Cloke, University of Sussex, UK
  Melissa Denecke, Karlsruhe Institute of Technology, Germany
  Laurent Maron, Université Paul Sabatier, Toulouse, France
  Jeffrey Long, University of California, Berkeley, USA
  Nik Kaltsoyannis, University College London, UK
  Marinella Mazzanti, CEA, Grenoble, France
  Paula Diaconescu, University of California, Los Angeles, USA
  Jonathan Lloyd, University of Manchester, UK

This Dalton Discussion aims to highlight the burgeoning role, and exciting prospects for actinides in modern, metal-based chemistry. Abstracts for oral presentations must be sent in before 15th February 2013.

Authors of the selected oral abstracts will then be expected to submit their work as a full paper, which will form the basis of their short presentation at the Discussion meeting. The paper itself must contain new, unpublished work and be submitted for review to the Editorial Office of Dalton Transactions by 16th August 2013. At the conference, each author will be given approximately 5 minutes to summarise the key points of their paper in order to leave the majority of time open for discussion

This year, Dalton Discussion 14 is adopting a new process. Papers presented at Dalton Discussions will continue to be published in a dedicated themed issue of Dalton Transactions, however article peer-review will now take place after the Discussion. This means that speakers have longer to make the finishing touches to their article before the papers are made available online prior to the meeting.

To find out more about Dalton Discussion 14 and to submit your abstract, visit the dedicated RSC webpage.

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Studying hydrogen activation of FLPs

Scientists from Pacific Northwest National Laboratory have investigated the mechanism of heterolytic H2 activation by frustrated lewis pairs (FLPs). To do this, they employed an unique approach of solution calorimetry and were able to obtain the enthalpies and relative rates of H2 activation.

With the exception of previous studies that partly relied on theoretical calculations, there has not been a great deal of work devoted to understanding how molecular hydrogen is activated by FLPs. Autrey and colleagues have found that H2 activation rates using such species are relatively fast considering no metals are involved. They discovered that the rate was dependent on the structure of the Lewis basic amine involved, and that diffusion of hydrogen across the gas-liquid interface is not rate limiting.

Further work is needed to extract fundamental rate constants, kinetic orders, and activation barriers, say the researchers.

Read the article now to find out more…
A thermodynamic and kinetic study of the heterolytic activation of hydrogen by frustrated borane–amine Lewis pairs
Abhi Karkamkar, Kshitij Parab, Donald M. Camaioni, Doinita Neiner, Herman Cho, Thomas K. Nielsen and Tom Autrey

This article is part of an upcoming themed issue on Boranes and Borohydrides, guest edited by Simon Aldridge. Other articles by this author include:

Methods to stabilize and destabilize ammonium borohydride
Thomas K. Nielsen, Abhi Karkamkar, Mark Bowden, Flemming Besenbacher, Torben R. Jensen and Tom Autrey

Also of interest… Take a look at our recent themed issue in Frustrated Lewis Pairs

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