Dalton Transactions Blog

Helicate or catenate?

22 May 2012

This article is HOT as recommended by the referees. And we’ve made it free to access for 4 weeks

The team expected the assembly to form a helicate rather than catenate structure

Predicting the structure of large self-assembled units can become very complicated very quickly. Yet it is important for the rational design of new structures to understand how they assemble so new arrangements can be designed, with functional and valuable properties.

This Hot Article from the Piguet group investigates whether a pyridyl-benzimidazole ligand forms a double stranded helicate or a catenated architecture. The thermodynamic approach used to investigate the structures throws up some interesting results.

Looking for the origin of the switch between coordination-captured helicates and catenates
Lilit Aboshyan-Sorgho, Martine Cantuel, Gérald Bernardinelli and Claude Piguet
DOI: 10.1039/C2DT30414G

Love inorganic chemistry? Follow us @DaltonTrans

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Thorium nanochemistry

15 May 2012

By Helen Lunn, Publishing Editor.

This article is HOT as recommended by the referees. And we’ve made it free to access for 4 weeks

Although it has been known for some time that highly charged cations such as Th(IV) are susceptible to hydrolysis and subsequent polymerization, very little has been know about the exact nature of such polymeric species until now. Rothe et al. shed new light on this using a combination of X-ray absorption fine structure (XAFS) spectroscopy, high energy X-ray scattering (HEXS) measurements, and quantum chemical calculations to yield the most favourable structure as two Th(IV) dimers linked by a central Th(IV) cation through hydroxide bridges. This should have important implications in geology and waste reprocessing amongst others.

The solution structure of the Th(IV)-hydroxo pentamer

Read more for FREE for 4 weeks at:
Thorium nanochemistry: the solution structure of the Th(IV)–hydroxo pentamer
Clemens Walther, Jörg Rothe, Bernd Schimmelpfennig and Markus Fuss
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C2DT30243H

Also of interest may be:
Infrared spectra and structures of the Th(OH)₂ and Th(OH)₄ molecules
Xuefeng Wang and Lester Andrews
Phys. Chem. Chem. Phys., 2005,7, 3834-3838
DOI: 10.1039/B509401A

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New hard/soft donor ligand and its effect on the structure and redox behaviour of uranium complexes

15 May 2012

By Jennifer Newton, Publishing Editor.

This article is HOT as recommended by the referees. And we’ve made it free to access for 4 weeks.

David Emslie and colleagues from McMaster University describe the synthesis of a new rigid NSN-donor ligand as well as the preparation of uranium(IV) and uranium(III) complexes using this ligand and a previously prepared NON-donor ligand. A combination of cyclic voltammetry, DFT calculations and Atoms In Molecules calculations were used to compare U–SAR₂ and U–OAr₂ bonding and the results indicated increased covalency in U-SAR₂ bonds that is probably due to the short U-S distances and tight C-S-U angles in the complexes. This work will aid the advancement of approaches for lanthanide/actinide separation in nuclear fuel reprocessing as well as analytical actinide detection.

Rigid NON- and NSN-ligand complexes of tetravalent and trivalent uranium.

Download the full paper below which is being published as part of an upcoming Dalton Transactions special issue, New Talent: the Americas…

Rigid NON- and NSN-ligand complexes of tetravalent and trivalent uranium: comparison of U–OAr₂ and U–SAr₂ bonding
Balamurugan Vidjayacoumar, Sougandi Ilango, Matthew J. Ray, Terry Chu, Kristopher B. Kolpin, Nicholas R. Andreychuk, Carlos A. Cruz, David J. H. Emslie, Hilary A. Jenkins and James F. Britten
Dalton Trans., 2012
DOI: 10.1039/C2DT30247K

You may also find this 2010 Dalton Transactions themed issue on New horizons in organo-f-block chemistry interesting.

Remember you can keep up to date with all the latest news in inorganic chemistry by following us on twitter and signing up to our e-alert service.

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Themed issue: Application of inorganic chemistry for non-cancer therapeutics

11 May 2012

By Matthew Cude, Development Editor.

Application of inorganic chemistry for non-cancer therapeutics

Issue 21 of Dalton Transactions is a special issue focusing on therapeutic agents being developed in inorganic chemistry. The collection of articles showcases the variety of techniques and strategies employed by inorganic chemists to target a range of diseases and illnesses.

The Perspective by Pascale Delangle and Elizabeth Mintz overviews the use of copper chelation therapy in the treatment of Wilson’s disease (C2DT12188C), while Christophe Biot et al. discuss the therapeutic potential of metal-based antimalarial agents (C2DT12247B). Targeting is a prevailing theme in the issue and the paper from Chris Orvig et al. is no exception (C2DT12050J), while the contribution from Edward Tiekink (C2DT12225A) investigates the potential of selenium and tellurium compounds.

You can read the editorial from the issue’s Guest Editor Professor Katherine J. Franz, who succinctly runs through the contributions from all the issue authors. You can also browse the issue here and read the truly remarkable progress that the application of inorganic chemistry is having for non-cancer therapeutics.

Previous themed issues which cover emerging topics in inorganic chemistry can be found listed under the themed issue tab on the journal homepage.

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When 3nm is huge

10 May 2012

By Matthew Cude, Development Editor.

This article is HOT as recommended by the referees. And we’ve made it free to access for 4 weeks.

The packing structures of ionic crystals is an interesting field of study and this Hot Communication by Masaki Saito and Tomoji Ozeki is certainly no exception!

A Sr2+ salt of [MoVI72MoV60O372(CH3COO)30(H2O)72]42− exhibits a superposed kagome-lattice with huge channels whose diameters measure approximately 3.0 nm

Huge channels in a superposed kagome-lattice

The pair from the Ozeki Research Group have determined the crystal structures of a couple of interesting structures, one of which “exhibits a superposed kagome-lattice with huge channels whose diameters measure approximately 3.0 nm”.

To read more about these new compounds you can download the full paper below

Crystallization of a Keplerate-type polyoxometalate into a superposed kagome-lattice with huge channels
Masaki Saito and Tomoji Ozeki

You might also be interested in a few other papers on polyoxometalates, which along with this article will be published in our upcoming themed issue focusing on the topic.

Orientations of polyoxometalate anions on gold nanoparticles
Shelly Sharet, Ella Sandars, Yifeng Wang, Offer Zeiri, Alevtina Neyman, Louisa Meshi and Ira A. Weinstock

A co-crystal of polyoxometalates exhibiting single-molecule magnet behavior: the structural origin of a large magnetic anisotropy
Xikui Fang, Kendall McCallum, Harry D. Pratt III, Travis M. Anderson, Kevin Dennis and Marshall Luban

Want to keep up with inorganic chemistry? follow us @DaltonTrans

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Articles from around the world: USA

04 May 2012

By Matthew Cude, Development Editor.

Inorganic chemistry USA Dalton free articles

Dalton Transactions publishes articles from around the globe

Dalton Transactions has been publishing research in inorganic chemistry for over 40 years, from over 85 countries. To highlight some of the contributions from across the globe we will be selecting a different geographic region each month, collecting some high impact papers and making them free to access! This month, the USA……

Rapid catalytic water oxidation by a single site, Ru carbene catalyst
Zuofeng Chen, Javier J. Concepcion and Thomas J. Meyer
Dalton Trans., 2011,40, 3789-3792

Hydro-ionothermal syntheses, crystal structures, and properties of five new divalent metal iminophosphonates
Kevin J. Gagnon, Andrey V. Prosvirin, Kim R. Dunbar, Simon J. Teat and Abraham Clearfield
Dalton Trans., 2012,41, 3995-4006

Non-traditional platinum compounds for improved accumulation, oral bioavailability, and tumor targeting
Katherine S. Lovejoy and Stephen J. Lippard
Dalton Trans., 2009, 10651-10659

Synthesis and reactivity of cationic niobium and tantalum methyl complexes supported by imido and β-diketiminato ligands
Neil C. Tomson, John Arnold and Robert G. Bergman
Dalton Trans., 2011,40, 7718-7729

Isocyanide insertion and cyclization reactions to form indolines using pincer-type complexes of scandium
Benjamin F. Wicker, Maren Pink and Daniel J. Mindiola
Dalton Trans., 2011,40, 9020-9025

O2 Reduction to H₂O by the multicopper oxidases Inorganic chemistry USA Dalton free articles
Edward I. Solomon, Anthony J. Augustine and Jungjoo Yoon
Dalton Trans., 2008, 3921-3932

You can check out our homepage for the latest articles and if you follow us on twitter or sign up to our e-alert service you can keep up to date with the latest news in inorganic chemistry, hassle free.

Interested in finding out more about the RSC? Join the RSC University Roadshow 2012, which is currently touring the USA, giving you the opportunity to meet some of the RSC Editors, Associate Editors, Board members and get demonstrations on our interactive services such as ChemSpider!

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Submissions open for upcoming themed issue in Mechanistic Organometallic Chemistry

03 May 2012

By Fiona McKenzie, Executive Editor.

Submissions are now open for the latest planned Dalton Transactions themed issue in Mechanistic Organometallic Chemistry.

Mechanistic Organometallic chemistry Guest Editor: Professor Bob Crabtree, Yale University

Experimental and theoretical contributions will be considered but combined experimental–theoretical contributions are especially welcome.

For information on our article types, please see our author guidelines.

Please note that the normal refereeing procedure will apply and inclusion of articles in the themed issue is at the discretion of the guest editor.

Want to submit?
Do so before the 4th October 2012. Mark on your submission that it is intended for the themed issue. Submissions can be made here.

Please feel welcome to contact the Editorial Office with any queries.

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Cryo-TEM reaveals POM-nanoparticle interactions

27 Apr 2012

By Jennifer Newton, Publishing Editor.

Ira Weinstock and colleagues from Ben Gurion University of the Negev have used cryogenic transmission electron microscopy to evaluate the interactions of polyoxometallates of different dimensions and shapes with gold nanoparticles. The study revealed a “face-down” orientation of the Pressyler ion [NaP₅W₃₀O₁₁₀]^14–, and a “tilted” orientation for the Finke-Droege ion [P₄W₃₀Zn₄(H₂O)₂O₁₁₂]^16–, contributing to important ongoing studies on the design of functional-POM protected metal nanoparticles.

"Face-down" orientation of Pressyler ion maximises interactions between cluster anion and Au surface.

To read more, download the communication now – it’s free to access.

Orientations of polyoxometalate anions on gold nanoparticles
Shelly Sharet, Ella Sandars, Yifeng Wang, Offer Zeiri, Alevtina Neyman, Louisa Meshi and Ira A. Weinstock
Dalton Trans., 2012
DOI: 10.1039/C2DT30592E

The findings in the above HOT communication are due to be included in an upcoming themed issue on Polyoxometalates, guest edited by Leroy Cronin and Deliang Long.

Yifeng Wang and Ira Weinstock’s previous Dalton Transactions perspective might also be of interest….

Cation mediated self-assembly of inorganic cluster anion building blocks
Yifeng Wang and Ira A Weinstock
Dalton Trans., 2010, 39, 6143-6152
DOI: 10.1039/C0DT00166J

Are you following us on Twitter? @DaltonTrans

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Delivering cancer-combatting compounds

27 Apr 2012

By Fiona McKenzie, Executive Editor.

Scientists from Switzerland have developed a cage-encapsulated ruthenium complex for killing cancer cells.

The multifunctional drug has several features providing it with it’s fantastic anti-cancer properties… 1) it’s ruthenium based instead of platinum (less toxic and has been shown to overcome certain resistance mechanisms induced by Pt); 2) the pyrenyl ligands can easily intercalate with the DNA base pairs; and 3) the metalla-cage bestows water-solubility on the drug therefore enabling it to be internalised within the cancerous cells.

Not only that, the pyrene moiety is fluorescent so the uptake of the drug into the cell can be recorded in action.

Read the HOT article by Bruno Therrien and team now…
Cellular delivery of pyrenyl-arene ruthenium complexes by a water-soluble arene ruthenium metalla-cage
Mona Anca Furrer, Frédéric Schmitt, Michaël Wiederkehr, Lucienne Juillerat-Jeanneret and Bruno Therrien

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Dalton Transactions Blog

Top ten most accessed articles in April

Helicate or catenate?

Thorium nanochemistry

New hard/soft donor ligand and its effect on the structure and redox behaviour of uranium complexes

Themed issue: Application of inorganic chemistry for non-cancer therapeutics

When 3nm is huge

Articles from around the world: USA

Submissions open for upcoming themed issue in Mechanistic Organometallic Chemistry

Cryo-TEM reaveals POM-nanoparticle interactions

Delivering cancer-combatting compounds

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