Archive for 2011

HOT Article: Towards new lanthanide architectures

In this HOT article, Faulkner and co-workers describe the self-assembly between di-carboxylate ions and a binuclear europium compound and some stable adducts and heterometallic lanthanide complexes. The synthetic approach may shed light on the design and synthesis of other new lanthanide architectures by spatial matching the interactions between two kinetically stable complexes or by well designed building blocks.

This article is part of a forthcoming themed issue on self assembly in inorganic chemistry, with Guest Editors Paul Kruger (University of Canterbury) and Thorri Gunnlaugsson (Trinity College Dublin).

Read more for FREE about these developments in self assembly at:
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, Advance Article
DOI: 10.1039/C1DT11103E

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Hot Article: Triazamacrocycles templated on iron

Peter G. Edwards and colleagues from Cardiff University and the University of Southampton investigate P3 and As3 macrocycles on an iron template in this Dalton Transactions Hot article.

The authors look at 9-membered triphospha- and triarsamacrocycles with unsaturated benzo-backbones that they make using a [CpRFe]+ template.

The complexes from an interesting ‘cup-shaped’ cavity, which could potentially accommodate anions.

Read the full article for FREE until 21st September to find out more…

Iron(II) template synthesis of benzannulated triphospha- and triarsamacrocycles
Thomas Albers, Julia Baker (neé Johnstone), Simon J. Coles, Peter G. Edwards, Benson Kariuki and Paul D. Newman
Dalton Trans., 2011, DOI: 10.1039/C0DT01724H

Keep up to date with the latest news and research in inorganic chemistry: sign up to the Dalton Transactions e-alert, check out our blog, and get the RSS feed.

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Hot Article: Cleaning up crude oil

A new system, using a solid state catalyst, to remove impurities from petroleum has been developed by US scientists.

With current oil consumption levels high, light crude oil reserves will be exhausted, giving way to heavy and extra heavy bitumen refinery feeds. These contain a higher proportion of large polycyclic hydrocarbons, together with N- and S-heteroaromatics, which need to be removed or transformed, without catalyst poisoning. Current methods to do this require high temperatures and pressures.

The catalyst made by the researchers, composed of ruthenium nanoparticles immobilised on a polymer, hydrogenates aromatic compounds under moderate conditions with no poisoning.

Hydrogenation of arenes and N-heteroaromatic compounds over ruthenium nanoparticles on poly(4-vinylpyridine): a versatile catalyst operating by a substrate-dependent dual site mechanism
Minfeng Fang, Nataliya Machalaba and Roberto A. Sánchez-Delgado
Dalton Trans., 2011, DOI: 10.1039/C1DT10801H

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Hot Article: Understanding the intermediates in reductive coupling of carbon monoxide

Read this Dalton Transactions Hot article to find out about how uranium can reductively couple carbon monoxide, an interesting reaction in Fischer-Tropsch chemistry.

Jennifer Green and co-workers at Oxford University use density functional theory to look at the reductive di- tri- and tetramerization of CO. They look at the linear yne diolate complex which forms if there is no further CO to react with the dimeric C2O2 reaction intermediate, amongst other intermediates. With the insight provided by this computational study a better understanding can be gained of Fischer-Tropsch chemistry.

Read the full article for FREE until 15th September to find out more…

Reductive coupling of carbon monoxide by U(III) complexes—a computational study
Georgina Aitken, Nilay Hazari, Alistair S. P. Frey, F. Geoffrey N. Cloke, O. Summerscales and Jennifer C. Green
Dalton Trans., 2011, DOI: 10.1039/C1DT10692A

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

DD13: Inorganic Photophysics and Photochemistry

Dalton Discussions 13 will be held at the University of Sheffield in September next year. The meeting focuses on Inorganic Photophysics and Photochemistry – Fundamentals and Applications.

The aim of the meeting is to bring together people from a wide range of disciplines – from theory and ultrafast spectroscopy to medicinal chemistry and biology – but all with a shared interest in the use of light.

Dalton Discussions are an excellent forum for scientists to present and discuss their work, allowing an invaluable exchange of views and ideas. Researchers submit their abstracts to the Scientific Committee, then selected authors are chosen to present their work at the meeting. Prior to the meeting the authors submit their work as an article, which is then peer reviewed and circulated amongst the participants. At the meeting itself the author has 5 minutes to summarise their article and then the floor is opened to questions and debate – the real focus of Dalton Discussions.

The call for papers is now open, submit your oral abstract now to be part of Dalton Discussions 13.

Key note speakers:

Professor Majed Chergui, Switzerland
Professor Luisa de Cola, Germany
Professor Richard Eisenberg, USA
Professor Peter Ford, USA

The key themes of the meeting have been identified as solar energy, energy and electron transfer, applications of strongly emissive complexes and bond breaking and isomerisation.

Deadlines:

Oral abstract deadline 9 October 2011
Poster abstract deadline 6 July 2012
Early bird registration deadline 6 July 2012
Standard registration deadline 3 August 2012

Visit the DD13 website for more information.

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Jamie Humphrey reports from ICBIC 15

This week I attended the 15th International Conference on Biological Inorganic Chemistry (ICBIC), organised under the auspices of the Society of Biological Inorganic Chemistry.

This was my fourth ICBIC, and as I have been before at previous meetings, I was very impressed with both the quality of the science presented, and the breadth of science covered. There were too many session headings to list here (the full programme can be found on the conference website), but to give an idea of the breadth of biological inorganic chemistry presented, the different sessions covered therapeutics (treatments for malaria, cancer and Alzheimer’s); enzymes (nitrogenase, oxygenase, peroxidase); trafficking (Cu, Ni, Fe); imaging; sensing; bioorganometallic chemistry; and metallomics – with all this great chemistry to cover, the conference spanned 6 days. Sadly, I was only able to attend the first half of the conference.

I knew to expect a warm welcome for delegates at this conference: the biological inorganic chemistry community is very friendly and welcoming. However, we were also blessed to be welcomed by perfect weather in the beautiful city of Vancouver. We could not have wished for a better location for the meeting –  I had heard some very good things about Vancouver, but the reality surpassed the imagination!

With about 700 delegates, ICBIC15 was busy enough to have a buzz about it, but not too busy to feel anonymous (and to ensure everyone could have one of the great cakes served during the morning coffee break – I noticed that I am not the only one with a weakness for cinnamon buns).

The organisers had made a conscious decision to open up the presentations, by having a larger number of contributed talks than there has been in recent ICBICs. This seemed to have worked very well, as it helped to encourage a good number of talks by early career members of the community. While it is always a pleasure to listen to more established chemists, there is something particularly special about hearing from those who are just starting to build their scientific presence and reputation.

The first ICBIC was held 35 years ago, and to celebrate, a number of Jade Anniversary lectures were given by Harry Gray, Ed Solomon, Ken Raymond, Jan Reedijk and David Garner, to name but a few. The Jade speakers had the significant challenge of covering 35 years of chemistry in 20-30 minutes, but they were all up to the challenge!

The organising committee, in particular Chris Orvig, are to be congratulated for selecting an exciting programme of scientific talks and social events for us all  to enjoy, and Sheri and Alison for ensuring all worked well behind the scenes for the week. Everything ran smoothly and seemingly effortlessly, a sure sign of excellent organisation.

You know when you have attended a good conference when you feel reluctant to leave and say goodbye, to the friends who you saw  again and to those you met for the first time. 2013 seems too long to wait for the next ICBIC… ICBIC16 will be held 14-19 July 2013 in Grenoble, France.

Where you also at ICBIC15? What was your favourite part of the meeting? Tell us about your own ICBIC experience by posting a comment below…..

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Hot Article: Leonard Lindoy’s latest metallosupramolecular research

Read Leonard Lindoy’s latest supramolecular host-guest formation research in this Dalton Transactions Hot article.

Lindoy’s group make helicates and tetrahedral Ni and Fe host complexes from quaterpyridine ligand derivatives, and look how they can control which products they get. They are particularly interested in the cavity volumes of the tetrahedral cages they make, and hope in the future to look at the host-guest chemistry of the cages with the largest cavities.

Read the full article for FREE to find out more…

New nickel(II) and iron(II) helicates and tetrahedra derived from expanded quaterpyridines
Christopher R. K. Glasson, George V. Meehan, Cherie A. Motti, Jack K. Clegg, Peter Turner, Paul Jensen and Leonard F. Lindoy
Dalton Trans., 2011, DOI: 10.1039/C1DT10667H

This manuscript will be part of the issue celebrating the 40th Anniversary of Dalton Transactions. Click on the 40th Anniversary link on the right hand side to find out what else we are doing.

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Getting down to the nitty gritty in layered LiAlO2

Radostina Stoyanova and co-workers have carried out detailed analysis of the zero-field splitting parameters (ZFS) of Mn4+ and Fe3+ ions in LiAlO2 with a layered structure are analyzed both experimentally and theoretically by using high-frequency electron paramagnetic resonance spectroscopy, Neuman superposition model (NSM), DFT and multiconfigurational calculations and reported their work in the recent Dalton Transactions Hot Article.

But why are they doing this analysis you might ask? Well, oxide-based materials, like doped layered LiAlO2, are important components of lithium ion batteries. In order to optimise materials like this for energy storage applications it is necssary to look at their atomic arrangement on a very small scale as Stoyanova and colleagues successfully carry out and report in this paper, which you can read for free until the 5th September.

Local structure of Mn4+ and Fe3+ spin probes in layered LiAlO2 oxide by modelling of zero-field splitting parameters
Radostina Stoyanova, Anne-Laure Barra, Meglena Yoncheva, Elitza Kuzmanova and Ekaterina Zhecheva
Dalton Trans., 2011, DOI: 10.1039/C1DT10929D

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Low-cost phosphors for flat panel TVs

Field emission displays (FEDs) have recently gained much attention as they are considered to be the next generation flat panel displays. FEDs have some fascinating features such as great brightness, wide horizontal and vertical view angles, good contrast ratio, high efficiency with a low power consumption and short response times.

Jun Lin and colleagues from Changchun, China are working on possible phosphors for use in FEDs and the group report a promising new Zn2GeO4:Mn2+ submicrorods which might make a useful phosphor in their recent Dalton Transactions Hot Article. The submicrorods were produced using a simple, low cost hydrothermal method without any surfactant assistance. Read the article to find out more – free for you to access until 31 August 2011.

(Zn, Mg)2GeO4:Mn2+ submicrorods as promising green phosphors for field emission displays: hydrothermal synthesis and luminescence properties
Mengmeng Shang, Guogang Li, Dongmei Yang, Xiaojiao Kang, Chong Peng, Ziyong Cheng and Jun Lin
Dalton Trans., 2011, DOI: 10.1039/C1DT10673

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)

Conference: AGICHEM 2011 from 21-23 September

AGICHEM 2011 (Anglo-German Inorganic Chemistry): 8th International Conference  on Inorganic Chemistry will take place on the 21-23 September 2011 in  Heidelberg, Germany.

This is the latest in a series of meetings jointly organized by the GDCh’s and RSC’s inorganic divisions and brings together a great cross section of inorganic themes, presented by leading researchers in their areas.

Now open for registration. For more information see the website.

Digg This
Reddit This
Stumble Now!
Share on Facebook
Bookmark this on Delicious
Share on LinkedIn
Bookmark this on Technorati
Post on Twitter
Google Buzz (aka. Google Reader)