Archive for the ‘News’ Category

Cram Lehn Pedersen Prize awarded at ISMSC

The 2012 Cram Lehn Pedersen Prize has recently been awarded to Dr Jonathan Nitschke at the 2012 International Symposium on Macrocyclic and Supramolecular Chemistry (ISMSC-7) at the University of Otago in Dunedin, New Zealand. 

The prize, sponsored by ChemComm and named in honour of the winners of the 1987 Nobel Prize in Chemistry, recognises significant, original and independent work in supramolecular chemistry by emerging investigators.

Jonathan Steed presents Jonathan Nitschke with the Cram Lehn Pedersen Prize
ChemComm Associate Editor Jonathan Steed (left) presents Jonathan Nitschke with the Cram Lehn Pedersen Prize (photo taken by Scott Cameron)

Presenting the award on behalf of ChemComm and the Organising Committee of the ISMSC, Professor Jonathan Steed of Durham University commented that “the forward-looking and sophisticated approach to the field adopted by its new stars such as Jonathan Nitschke highlights just how far the area has moved forward from its roots in classical macrocyclic chemistry. We can never forget just how visionary those early macrocyclic pioneers were in recognising the key interrelated importance of shape and function at a molecular level. This startling evolution was beautifully documented at the meeting by a fascinating retrospective by macrocyclic pioneer Prof. Neil Curtis that immediately preceded Prof. Nitschke’s elegant description of the self-assembled container chemistry and thermally switchable gels he is producing using the same principles some 55 years after Curtis’ initial discoveries.”

The conference continues until 2nd February. Later in the year, Jonathan Nitschke will be taking part in a Swiss lecture tour to celebrate his award: University of Zurich (29 May), Federal Polytechnic School of Lausanne (EPFL; 30 May), University of Geneva (31 May), Swiss Federal Institute of Technology Zurich (ETH; 1 June).  

Nominations for the 2013 Cram Lehn Pedersen prize to be awarded at ISMSC-8 in Crystal City, Virginia, USA, will open later in the year. Stay tuned to the ChemComm blog for details.

Also of interest:
2011 Winner: Professor Amar Flood
ChemComm Supramolecular Chemistry web theme

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Selective condensations of saccharides

Researchers from Leiden University have developed a new method for the synthesis of βD-rhamnosides (5).

Gijsbert van der Marel’s group showed that C-6 thiophenyl ethers act as stereodirecting groups for condensation reactions of mannosyl donors (1), leading to 1,2-cis products.

They think the reaction proceeds via formation of a bicyclic sulfonium ion (2) that acts as a ‘reservoir’ for a reactive oxocarbenium species (3). Following reaction with an intermolecular nucleophile to form 4, desulfurisation provides the corresponding 1,2-cisD-rhamnoside (5).

The researchers demonstrated the method’s utility for assembling complex oligosaccharides by making tetrasaccharide 6. This tetrasaccharide forms part of the structure of Xanthomonas campestris pathovar campestris, the causative agent of a devastating disease affecting cruciferous crops such as cabbage and broccoli.

To find out more, download the group’s ChemComm communication.

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100th anniversary of first X-ray diffraction experiment

It’s 2012 and avid readers of our blog will know that the number 100 is very important to ChemComm this year.

This is the first year ChemComm will publish 100 issues  but did you know it is also 100 years since Max von Laue’s first X-ray diffraction experiment?

Max von Laue was a Professor of Physics at the University of Munich in Germany and he used copper sulfate as a 3D diffraction grating for X-rays. The field developed rapidly after this pioneering work and today X-ray diffraction is a commonly used technique for revealing information about the structure of materials.

The anniversary of Laue diffraction has been highlighted on the cover of ChemComm issue 16 by Oliver Oeckler and colleagues, who report their recent use of Laue diffraction in the issue. More specifically, they used in situ microfocus Laue diffraction to investigate temperature-dependent phase transitions of GeTe-rich compounds. Find out what they discovered by downloading their communication.

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Germanium-bridged polymer for organic solar cells

A team of scientists from the UK and US have made a novel germanium-bridged polymer that shows promise for organic solar cells.

Martin Heeney, at Imperial College London, and colleagues synthesised a heterocyclic monomer bridged with two germanium atoms. They co-polymerised it with an electron-accepting benzothiadiazole to give a polymer that, in contrast to the analogous C-bridged system, is semicrystalline.

Being able to design crystallinity into conjugated polymers in such a way is useful because crystalline polymers are better at transporting charge and hence offer more potential for solar cells. Heeney’s polymer exhibited power conversion efficiencies of over 5 % in bulk heterojunction solar cells. The team are now investigating the use of additives and co-solvents to increase this further.

Find out more – download Heeney’s ChemComm communication.

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Mineral regulates early metabolism

Chinese scientists have taken a step towards further understanding the reactions that led to the origin of life by showing that a crucial metabolic process can be photocatalysed on the surface of a common mineral.

The citric acid or tricarboxylic acid cycle is central to almost all life and is used to generate energy from the conversion of acetate from fats, proteins and carbohydrates to carbon dioxide and water. Some bacteria run this cycle in reverse in a reductive tricarboxylic acid cycle (rTCA), making carbon compounds from carbon dioxide and water, and this has been suggested to be the central part of primordial metabolism.

Wei Wang from Harbin Institute of Technology and colleagues claim that early reactions to form biological molecules and metabolic pathways could have occurred on the surface of sulfide minerals in under-sea hydrothermal vents. This could explain why enzymes containing transition metal-sulfide clusters play a vital role in the metabolism of most organisms.

sphalerite-mineral_shutterstock
Early metabolic reactions could have happened on the surface of the mineral sphalerite (ZnS)

Read the full article in Chemistry World

Link to Article
Photocatalytic reversible amination of α-keto acids on a ZnS surface: implications for the prebiotic metabolism
Wei Wang, Qiliang Li, Bin Yang, Xiaoyang Liu, Yanqiang Yang and Wenhui Su
Chem. Commun., 2012, Advance Article
DOI: 10.1039/C2CC15665B

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Joint ChemComm–RSC Prizes and Awards Symposium in London

We are delighted to announce the forthcoming ChemComm–RSC Prizes & Awards Symposium in association with the RSC Analytical Division.

Date: Wednesday 22nd February 2012
Location: Imperial College London, UK
Time: 1300-1800

The purpose of this event is to bring together scientists in a stimulating and friendly environment to recognise the achievements of individuals in advancing the chemical sciences and also to foster collaborations. The symposium will appeal to academic and industrial scientists with an interest in analytical science, protein structure and interactions, and biosensors. Attendance at the symposium is FREE OF CHARGE and student participation is strongly encouraged.

The following distinguished scientists have agreed to speak:

For further details and to register your interest, please contact Anne Horan.

***
The closing date for RSC Prizes and Awards 2012 is 15th January 2012. Find out more >
***

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Welcome to the year of 100 issues!

Happy New Year!

Graphical abstract: ChemComm: A new era
2012 brings exciting changes to ChemComm, including a Nobel Prize-winning Chair and an increase in frequency to 100 issues.

Read our Editorial where we reflect on how a successful 2011 has paved the way for the biggest year in the history of ChemComm.

And find out what our new Chair Richard Schrock thinks…..

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3 days until 100 issues…

….and did you know….?

ChemComm communications should be no longer than 3 journal pages and, of course, report urgent, high quality and novel research.

Have you read our author guidelines? They are full of useful information about preparing your communication so please check them out before submitting your manuscript.

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5 days until 100 issues…

….and did you know….?

5 is the number of ChemComm symposia held to date. We’ve brought together scientists in stimulating and friendly environments in Japan, China and Korea to disseminate the latest hot research and foster collaborations between the researchers and the universities involved.

Read Editor Robert Eagling’s blog from this year’s 5th ChemComm Symposium to find out more about his visit to Kyoto, Lanzhou and Nankai.

And stay tuned for news of the next ChemComm symposium, taking place at Imperial College London in February. Preliminary details >

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7 days until 100 issues…

….and did you know….?

ChemComm published 7 web-based thematic issues in 2011:

We are still adding articles to some of these issues so please visit the themed issue webpages to view the latest research.

If you have an idea for a web theme, let us know! Email the Editorial Office >

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