Archive for June, 2011

Hot Article: Fighting cancer with copper complexes

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In this Dalton Transactions Hot article, Chebrolu P. Rao from the Indian Institute of Technology, Bombay and colleagues investigate the anticancer activity of the organometallic compound, copper (II) anthracenyl-terpyridine.

This compound is particularly exciting because it kills cells in a way not seen before with copper complexes.

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Read the full article for FREE to find out more…

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Synthesis, characterization, plasmid cleavage and cytotoxicity of cancer cells by a copper(II) complex of anthracenyl-terpyridine
Amit Kumar, Jugun Prakash Chinta, Amrendra Kumar Ajay, Manoj Kumar Bhat and Chebrolu P. Rao
Dalton Trans., 2011, DOI: 10.1039/C1DT10201J

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HOT article: Possible water-soluble catalysts for homogeneous catalysis

In this HOT article, a very careful synthetic and catalytic study of the use of di- and trisulfonated phosphines with o, m and o, m, m substitution patterns is described. Pd complexes of these were tested for  copolymerizations with polar monomers. This led to a novel anionic phosphine sulphonate Pd(II)-based pre-catalyst salt for polymerisation reactions.  Although, polymerisation in the presence of methyl acrylate, acrylonitrile and vinyl acetate led to reduced incorporation values compared to the available literature reports in combination with problems that are attributed to aggregation of the catalyst in most cases, the facile synthesis of chelating highly polar ligands which show high water solubility could be of significant interest for homogeneous catalysis by application in other systems.

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Synthesis of non-symmetrically sulphonated phosphine sulphonate based Pd(II) catalyst salts for olefin polymerisation reactions
Timo M. J. Anselment, Carly E. Anderson, Bernhard Rieger, M. Bele Boeddinghaus and Thomas F. Fässler
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10372E

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Getting the lead in!

Getting the lead (Pb that is) into radiotherapeutics! In their Dalton Transactions Perspective article Martin Brechbiel and Kwon Yong tell us how lead can be used to target and kill tumour cells. They discuss recent uses and strategies for 212Pb as a potential radiotherapeutic and discusses pre-clinical trials, with an emphasis on the development of 212Pb towards clinical translation.

READ THE REVIEW: Towards translation of 212Pb as a clinical therapeutic; getting the lead in!
Kwon Yong and Martin W. Brechbiel
Dalton Trans., 2011, 40, 6068-6076   DOI: 10.1039/C0DT01387K

This article is part of the themed issue: Radiopharmaceuticals for imaging and therapy – investigate this issue here!

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Hot Article: Os pincer catalysts racemise and deuterate alcohols for first time

Walter Baratta and colleagues describe the first examples of osmium catalysts used for the racemization and deuteration of alcohols. The group found that diphosphine based pincer complexes based on ruthenium and osmium are are efficient catalysts for the racemization of secondary alcohols and also efficiently catalyze the deuteration of both primary and secondary alcohols.

Read their HOT article to find out more. This article is free to read for four weeks.

 

Pincer Ru and Os complexes as efficient catalysts for racemization and deuteration of alcohols
Gianluca Bossi, Elisabetta Putignano, Pierluigi Rigo and Walter Baratta
Dalton Trans., 2011, Advance Article DOI: 10.1039/C1DT10498E

This paper will feature in the forthcoming Pincers themed issue appearing soon – guest editors Professors Gerard van Koten and Bert Klein Gebbink. Look out for the issue when it is published later this summer!

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Dalton Transactions Younger Researchers Symposium: Abstract Deadline Approaching!

 

A chance to meet fellow postgraduates and postdocs from the wider UK inorganic community this year at the Dalton Transactions Younger Researchers Symposium. The meeting, organised in associated with Johnson Matthey, is taking place in University of Warwick on 20-21 September 2011. Register and submit your abstract now for a chance to

Remember registration for the symposium is free of charge!  More information available at the event webpage.
 
Register now! Abstract Deadline 22 July 2011

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Hot Article: Probing photomagnetic materials

In this Dalton Transactions Hot Article, Maria-Angels Carvajal and colleagues probe the photomagnetic properties of a copper octacyanomolybdate complex using high level ab initio calculations.

The authors describe in detail the photomagnetic process arising from a local Mo d-d excitation in the complex. They also show that there is a small energy barrier for the reverse reaction and that it can be induced by light. They also investigate the temperature dependence of the magnetic susceptibility and compare it with experimental values.

Photomagnetic materials are of interest as candidates for use in memory devices and optical switches.

Read more for FREE until Tuesday 12th July:
Insights on the photomagnetism in copper octacyanomolybdates
Maria-Angels Carvajal, Rosa Caballol and Coen de Graaf
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10120J, Paper

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Hot Article: New silver complexes

In this Dalton Transactions Hot Article, Graham Bowmaker from the University of Auckland and colleagues, synthesised three new disilver(I) carbonate/tertiary phosphine complexes.

Solution and mechanochemical methods were used. The use of the mechanochemical synthesis demonstrates an additional aspect of this type of method. The study also demonstrates the value of ATR IR and CPMAS NMR for monitoring the progress of mechanochemical synthesis.

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Solution and mechanochemical syntheses, and spectroscopic and structural studies in the silver(I) (bi-)carbonate: triphenylphosphine system
Graham A. Bowmaker, Effendy, John V. Hanna, Peter C. Healy, Scott P. King, Claudio Pettinari, Brian W. Skelton and Allan H. White
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10416K, Paper

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Oorgdagar 2011 Swedish Chemical Society, Division of Inorganic Chemistry Meeting

Ms Aneheim flanked by conference organisers Prof Lars Öhrström, Chalmers Tekniska Högskola (left) and Dr Christopher Knee, University of Gothenburg. Photo credit: Magnus T. Johnson

The inorganic chemistry division of the Swedish Chemical Society held their ‘Oorgdagar 2011′ last week. This meeting brings together researchers in inorganic chemistry, from organometallic chemistry to materials chemistry, in Sweden and Scandinavia. To find out more visit the inorganic chemistry division’s webpage, or see Jamie’s earlier blog.

Dalton Transactions was pleased to sponsor a poster prize at the meeting, which was awarded to Emma Aneheim, a phd student at Chalmers University of Technology in Göteborg, Sweden. Ms Aneheim’s poster was on ‘Palladium chemistry in the advanced reprocessing of spent nuclear fuel’. Find out more about her research by visiting Emma’s webpage at the Department of Nuclear Chemistry.

Conference organiser Prof Lars Öhrström was very enthusiastic about how well the meeting went, commenting ‘it was a great success with speakers from the UK, Germany, Finland, South Africa, France, USA as well as Sweden. The next (second) meeting will be held in Lund 2013′

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Dalton Transactions is sponsoring a poster prize at FEZA 2011

Dalton Transactions is pleased to be sponsoring a poster prize at the 5th International Federation of European Zeolite Associations meeting in Valencia, Spain. This years conference is being hosted by the Spanish Zeolite group, with the theme ‘Innovations in Zeolites and ordered Porous Solids’.

The conference has an exciting list of plenary and keynote speakers including Ferdi Schüth, Étienne Duguet and Jihong Yu.

To find out more about the poster prize visit the FEZA 2011 website.

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HOT article: Role of steric hindrance in enantioselective catalysis

In this HOT article, the authors have extended their work in understanding enantioselective catalysis by coordination compounds. The role of steric hindrance in controlling the binding mode of propylene oxide to a novel vanadyl salen-type complex N,N‘-bis(5-tert-butylsalicylidene)-1,2-cyclohexanediamino-vanadium(IV) oxide, [VO(3)], has been investigated using CW/pulse EPR, ENDOR and HYSCORE spectroscopy and compared to that of the parent complex N,N‘-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediamino-vanadium(IV) oxide, [VO(1)]. Removal of the ‘inner tert-butyl groups from the salicylidene rings reduces the steric hindrance between the ligand and epoxide substrate. As a result the selectivity for binding single enantiomers of propylene oxide in these complexes is reversed in [VO(3)] relative to [VO(1)].

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Structure and pulsed EPR characterization of N,N‘-bis(5-tert-butylsalicylidene)-1,2-cyclohexanediamino-vanadium(IV) oxide and its adducts with propylene oxide
E. Carter, I. A. Fallis, B. M. Kariuki, I. R. Morgan, D. M. Murphy, T. Tatchell, S. Van Doorslaer and E. Vinck
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10378D

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