Archive for November, 2011

HOT Article: Different solvents mean different packing

Rational design of MOFs is a complex task with a range of variables including ligands, metals, reaction conditions and solvents, this HOT Communication in Dalton Trans. details the synthesis of a novel metal organic framework (MOF) using an aromatic linker and CdBr2. Leonard Barbour and Marike du Plessis synthesised the framework with different solvents and discovered different packing modes for the different solvent systems…… to find out more about their discoveries read the full Communication in Dalton Transactions

Supramolecular isomerism and solvatomorphism in a novel coordination compound
Marike du Plessis and Leonard J. Barbour
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11564B, Communication 

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Themed issue now online: Self-assembly in inorganic chemistry

Dalton Trans., 2011, 40(45): 11985-12396

Dalton Trans., 2011, 40(45): 11985-12396

Our themed issue on self-assembly in inorganic chemistry is now online.  Guest editors Paul Kruger and Thorfinnur Gunnlaugsson introduce the issue in their editorial.

Self-assembly in inorganic chemistry
Paul E. Kruger and Thorfinnur Gunnlaugsson
Dalton Trans., 2011, 40, 12003-12004
DOI: 10.1039/C1DT90162A

The front cover highlights work from Gale, Light, Ogden et al. examining the coordination of 2,5-dicarbothioamidopyrroles. De Cola et al. feature on the inside front cover with their description of a new class of water soluble metallosurfactant molecules based on luminescent neutral iridium(III) complexes.  Both cover articles will be free for 6 weeks so do take a look.

Further insight into the coordination of 2,5-dicarbothioamidopyrroles: the case of Cu and Co complexes
Louise E. Karagiannidis, Philip A. Gale, Mark E. Light, Massimiliano Massi and Mark I. Ogden
Dalton Trans., 2011, 40, 12097-12105
DOI: 10.1039/C1DT10441A

Aggregation induced colour change for phosphorescent iridium(III) complex-based anionic surfactants
Matteo Mauro, Gabriele De Paoli, Matthias Otter, Daniela Donghi, Giuseppe D’Alfonso and Luisa De Cola
Dalton Trans., 2011, 40, 12106-12116
DOI: 10.1039/C1DT11251A

The perspective by Jim Thomas gives an overview of research on sensor systems featuring discrete metal ion directed self-assembled architectures.

Metal ion directed self-assembly of sensors for ions, molecules and biomolecules
Jim A. Thomas
Dalton Trans., 2011, 40, 12005-12016
DOI: 10.1039/C1DT10876J

Also in the issue is the HOT communication from Stephen Faulkner and co-workers.  You can read Helen’s previous blog post on this article here.

Self-assembly between dicarboxylate ions and a binuclear europium complex: formation of stable adducts and heterometallic lanthanide complexes
James A. Tilney, Thomas Just Sørensen, Benjamin P. Burton-Pye and Stephen Faulkner
Dalton Trans., 2011, 40, 12063-12066
DOI: 10.1039/C1DT11103E

We’d like to thank the Guest Editors and all the authors for their contributions – it really is a fantastic issue and we hope you enjoy reading it.  Why not take a look at the articles today and blog your comments below.

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Hot Perspective: Shedding light on the oxygen-evolving-complex

Can we mimic the Photosystem II machinery for light-driven oxidation of water to molecular oxygen?

Can we mimic the Photosystem II machinery for light-driven oxidation of water to molecular oxygen?

In this Dalton Transactions Perspective, Philipp Kurz and colleagues discuss manganese-containing compounds that have been studied as potential analogues of the oxygen-evolving-complex in Photosystem II.  They highlight how the desire to produce solar fuels is inspiring research into artificial photosynthesis.

Read more for free until 29th November at:

Water oxidation catalysed by manganese compounds: from complexes to ‘biomimetic rocks’
Mathias Wiechen, Hans-Martin Berends and Philipp Kurz
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11537E, Perspective

You might also find these Dalton Trans. articles on biomimetic water-oxidation catalysis interesting…

Nano-size amorphous calcium–manganese oxide as an efficient and biomimetic water oxidizing catalyst for artificial photosynthesis: back to manganese
Mohammad Mahdi Najafpour, Sara Nayeri and Babak Pashaei
Dalton Trans., 2011, 40, 9374-9378
DOI: 10.1039/C1DT11048A

High turnover catalysis of water oxidation by Mn(II) complexes of monoanionic pentadentate ligands
Rune Kirk Seidler-Egdal, Anne Nielsen, Andrew D. Bond, Morten J. Bjerrum and Christine J. McKenzie
Dalton Trans., 2011, 40, 3849-3858
DOI: 10.1039/C0DT01340D

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HOT Article: Fine tuning of catalyst performance

Transition metal complexes bearing functional P,N-type ligands attract much attention because they combine hard nitrogen donor(s) and soft phosphorus donor(s) and offer considerable chemical and structural diversity. In this HOT Article,  Braunstein et al. report several palladium/cobalt and nickel complexes with phosphino-oxazoline ligands. Some of the nickel complexes were further checked for their ethylene reactivity, and showed activity for ethylene non-selective oligomerization. Interestingly, a reversible interconversion transform phenomena was observed between a couple of the isomeric Ni-complexes with variation of the solvent between CH2Cl2 and CHCl3.
The role of functional bidentate ligands in catalysis provides a versatile tool for fine tuning the performance of catalysts (Lewis base – Lewis acid interactions).

Read more for FREE until 29th November at:
A phosphino-oxazoline ligand as a P,N-bridge in palladium/cobalt or P,N-chelate in nickel complexes: catalytic ethylene oligomerization
Shuanming Zhang, Roberto Pattacini, Suyun Jie and Pierre Braunstein
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT11352F

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Traffic light signals for biolabelling

Luminescent iridium complex surfactants form spherical aggregates in water, changing from red to green on aggregation, scientists from Germany and Italy have discovered.
The team, led by Luisa De Cola, say that the aggregates have different properties to the single components, and that the change between them could enable this system to be used as a probe for bio-imaging and bio-labelling. Read more in their Hot Article – free to access until the 29th November 2011.

Aggregation induced colour change for phosphorescent iridium(III) complex-based anionic surfactants
Matteo Mauro, Gabriele De Paoli, Matthias Otter, Daniela Donghi, Giuseppe D’Alfonso and Luisa De Cola
Dalton Trans., 2011, DOI: 10.1039/C1DT11251A

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HOT Article: Figures of eight

Braunstein and co-workers have formed a dinuclear Ir(I) complex with a bis-NHC ligand in situ from
1,1′-((4,6-dimethyl-1,3-phenylene)bis(methylene))bis(3-methyl-1H-imidazol-3-ium) in
the presence of Cs2CO3 and [Ir(µ-Cl)(cod)]2. Its solid-state structure, determined by X-ray
diffraction, shows a figure-of-eight loop with both the P and M enantiomers being present. Solution NMR studies were also performed to examine the enantiodiscrimination between them.

Read more for FREE until the 29th November 2011 at:

Chiral anion-based NMR enantiodiscrimination of a dinuclear, cationic Ir(I) NHC complex with a figure-of-eight loop structure
Xianghao Liu, Jérôme Lacour and Pierre Braunstein
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11604E

Also read about the formation of unprecedented eight-membered chelates at:

Contrasting bonding modes of a tridentate bis(oxazoline)phosphine ligand in cobalt and iron vs. palladium complexes: unprecedented N,N-coordination for a N,P,N ligand
Anthony Kermagoret and Pierre Braunstein
Dalton Trans., 2008, 585-587
DOI: 10.1039/B717021C

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Professor Philip Mountford announced as new Dalton Transactions Editorial Board Chair

Professor Philip Mountford

Professor Philip Mountford

We are delighted and thrilled to announce that Professor Philip Mountford, from the University of Oxford, UK, has been appointed as the new Chair of the Dalton Transactions Editorial Board, with effect from 1st January 2012.

Philip’s research interests centre around studies of the bonding and stoichiometric and catalytic reactivity of organometallic and related compounds of the early transition and lanthanide metals, and, more recently, the alkaline earth metals. This research has a particular emphasis on compounds with metal-nitrogen multiple bonds, olefin polymerization and ring-opening polymerization towards “green” polymers. Philip is a Fellow of the Royal Society of Chemistry and a past recent recipient of the RSC’s Sir Edward Frankland Fellowship. He has been a Visiting Professor at several European universities and recently served as Acting Head of Inorganic Chemistry in Oxford.

Of his forthcoming role, Philip says: “I am delighted and honored to be taking over from Chris Orvig as Chair of the Editorial Board of Dalton Transactions at such an exciting time in the journal’s history. During my period as Chair, I will strive, together with Jamie Humphrey and the RSC editorial team, the Editorial Board and the Advisory Board, to not only maintain but to exceed Dalton Transactions’ current position and its reputation for quality papers, fair and robust refereeing, excellent technical support and impressive submission to publication times.”

We’d like to take this opportunity to thank the outgoing Chair, Professor Chris Orvig, who has successfully led the Editorial Board through a period of significant achivements for the journal.  Chris’ term of office finishes at the end of 2011.

Read some of Philip Mountford’s recently published articles by following the links below:

The First Group 4 Metal Bis(imido) and Tris(imido) Complexes†
Andrew Schwarz, A J Nielson, Philip Mountford and Nikolas Kaltsoyannis
Chem. Sci., 2011, Accepted Manuscript
DOI: 10.1039/C1SC00786F

Titanium alkoxyimido (Ti=N–OR) complexes: reductive N–O bond cleavage at the boundary between hydrazide and peroxide ligands
Andrew D. Schwarz, Ainara Nova, Eric Clot and Philip Mountford
Chem. Commun., 2011, 47, 4926-4928
DOI: 10.1039/C1CC10862J

Low-coordinate rare-earth complexes of the asymmetric 2,4-di-tert-butylphenolate ligand prepared by redox transmetallation/protolysis reactions, and their reactivity towards ring-opening polymerisation
Lawrence Clark, Glen B. Deacon, Craig M. Forsyth, Peter C. Junk, Philip Mountford and Josh P. Townley
Dalton Trans., 2010, 39, 6693-6704
DOI: 10.1039/C0DT00023J

Synthesis and ethylene trimerisation capability of new chromium(II) and chromium(III) heteroscorpionate complexes
Alexander F. R. Kilpatrick, Shaneesh Vadake Kulangara, Michael G. Cushion, Robbert Duchateau and Philip Mountford
Dalton Trans., 2010, 39, 3653-3664
DOI: 10.1039/B926333K

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