Dalton Transactions Editorial Board Member Lars Kloo (KTH, Sweden) describes the synthesis of polycationic clusters with a new solvent in this Hot article:
Dichloromethane as solvent for the synthesis of polycationic clusters at room temperature – a link to standard organometallic chemistry
Josefin Åkerstedt, Riccardo Zaffaroni and Lars Kloo, Dalton Trans., 2010, Advance Article
DOI: 10.1039/C0DT00769B
READ NOW! This article is free to access until the 1st of September.
In this hot Communication article the synthesis and magnetic properties of triangular nickle/lanthanide complexes are presented:
Initial employment of di-2-pyridyl ketone as a route to nickel(II)/lanthanide(III) clusters: triangular Ni2Ln complexes
Constantinos G. Efthymiou, Anastasia N. Georgopoulou, Constantina Papatriantafyllopoulou, Aris Terzis, Catherine P. Raptopoulou, Albert Escuer and Spyros P. Perlepes, Dalton Trans., 2010, Advance Article
DOI: 10.1039/C0DT00493F
READ NOW! This article is free to access until the 1st of September.
Dalton Transactions is publishing a themed issue dedicated to the inorganic contribution to radiopharmaceutical chemistry entitled “Radiopharmaceuticals for Imaging and Therapy”. This issue is to be Guest Editored by Professor Stephen Faulkner (Oxford University) and Professor Nick Long (Imperial College London).
Radiopharmaceuticals have already made an enormous contribution to the diagnosis and therapy of disease. Rapid development of the field continues, with important new approaches to targeting, bioconjugation and control of biological kinetics as well as through the application and purification of new radioisotopes, the development of new experimental techniques and the application of radioisotopes in multimodal imaging.
The time seems right to highlight and review these developments, and to present them in a single issue to the wider community of inorganic chemists. With this themed issue on radiopharmaceutical chemistry, we are aiming to highlight contributions from leading experts of the field, illustrating the scope of these new developments and analysing their potential in detail.
Submission Deadline: 15 October 2010
Submissions, either communications or full papers, should be high-quality manuscripts of original, unpublished research. To submit a manuscript for this themed issue please use our online submission service.
For further information about this issue please contact us at Dalton@rsc.org.
In this hot article 4 new metal supramolecular frameworks are described as well as their reversible crystal-to-amorphous chromotropism and crystal-to-crystal transformation accompanying the uptake of water:
Water-induced reversible structural phase transformation with chromotropism in metal supramolecular frameworks containing aminopyrazine and sulfate anions
Jaursup Boonmak, Motohiro Nakano, Narongsak Chaichit, Chaveng Pakawatchai and Sujittra Youngme, Dalton Trans., 2010, Advance Article
DOI: 10.1039/C002556A
READ NOW! This article is free to access until the 1st of September.
New Hot article published describing DNA cleavage by Cu(II) complexation:
DNA cleavage by the Cu(II) complex of the DNA-intercalating 9-bis(pyridin-2-ylmethyl)aminobenzo[b]quinolizinium
Maoqun Tian, Heiko Ihmels and Elke Brötz, Dalton Trans., 2010, Advance Article
DOI: 10.1039/C0DT00238K
READ NOW! This article will be free to access until the 1st of September.
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A robust catalyst that produces hydrogen from ammonia-boranes with high efficiency under atmospheric conditions has been developed by Spanish scientists.
The search for new energy sources to substitute depleting fossil fuels and decrease greenhouse gas emissions is a high priority. One of the best pollution-free alternatives to coal and oil is hydrogen However; a different and very important concern arises with using hydrogen: safety.
Incorporating hydrogen into chemical compounds, such as ammonia-borane (NH3BH3), that can store and release it in a controlled manner could be a way of overcoming safety issues. Catalysts based on metals including titanium, ruthenium or rhodium can efficiently release up to one equivalent of hydrogen gas, but it must be carried out under an inert atmosphere.
3 equivalents of hydrogen are released from the ammonia-borane store
Now Maria Angeles Garralda and her team at University of Pais Vasco in Spain have demonstrated the first homogenous catalysis reaction using an iridium catalyst for hydrolysing ammonia-boranes, which produces up to three equivalents of hydrogen in a very efficient reaction. As well as being more efficient than previous systems, the iridium catalyst has the added advantage that it is stable in water and air, so does not require an inert atmosphere.
‘The fact that this system was not active under anhydrous conditions and was, however, extremely efficient and stable in the presence of water was very surprising,’ says Maria Angeles Garralda. ‘The great stability in the presence of air and water and the great activity of this homogeneous catalyst will help to understand the mechanisms of hydrogen production’.
The understanding of the mechanism of this type of reactions is vital for the future development of more efficient and cheaper catalysts to generate hydrogen in fuel cells.
‘This homogenous catalytic system suggests that finer control over rate and product distribution might be possible in the future,’ points out Andrew Weller, an expert on organometallic chemistry and catalysis at University of Oxford, UK. ‘Ultimately, energy efficient re-hydrogenation strategies and cheaper, long-lived, immobilised catalysts are key targets; and research such as presented here suggests new avenues by which the latter of these goals might be achieved.’
Lorena Tomas Laudo
A hydridoirida-Β-diketone as an efficient and robust homogeneous catalyst for the hydrolysis of ammonia–borane or amine–borane adducts in air to produce hydrogen
Roberto Ciganda, María A. Garralda, Lourdes Ibarlucea, Elena Pinilla and M. Rosario Torres, Dalton Trans., 2010
DOI: 10.1039/c0dt00091d
Congratulations to Martin Bendle (University of Bristol) for winning the Dalton Transactions Poster Prize at the RSC Main Group Chemistry Discussion Group Meeting, which was held in Oxford on the 9th of July this year.
The title of the Martin’s winning poster was ‘Phosphoranimines: New Routes to Polyphosphazenes and Novel Reactivity’.
New Hot article published describing new insights into the mechanism of enzymatic activation of dioxygen by metal active sites, elucidated by high-pressure experiments:
Reinvestigation of the formation of a mononuclear Fe(III) hydroperoxido complex using high pressure kinetics
Thomas Nebe, Alexander Beitat, Christian Würtele, Carlos Dücker-Benfer, Rudi van Eldik, Christine J. McKenzie and Siegfried Schindler, Dalton Trans., 2010
DOI: 10.1039/c0dt00247j
READ NOW! This article will be free to access until the 18th of August.
Congratulations to Julien Panetier (Heriot-Watt University) for winning the Dalton Transactions Poster Prize at the 44th Annual Universities of Scotland Inorganic Chemistry (USIC) Conference, which was held in Durham on the 8th and 9th of July this year.
The title of the Julien’s winning poster was ‘Hydrodefluorination of Fluoroaromatics by [RuH2(CO)(NHC)(PPh3)2]: An Explanation for the 1,2-regioselectivity’.
