Archive for January, 2012

POMs away! Investigating rotational isomerism in POMs

Polyoxometalates (POMs) are an outstanding family of compounds, well known for their huge structural diversity, interesting catalytic activities and rich electrochemistry. POMs are comprised of metal oxide building blocks with a general formula {MOx}n.

Lee Cronin and his team have a long association with the study of these exciting structures and in their recent Hot Article in Dalton Transactions this team takes a look at the rotational isomerism of the non-classical Wells–Dawson POMs. The group combine their theoretical investigation with ESI-MS to connect theory to experimental results. In doing so they determine the general stability trend of these types of POMs. Find out more by reading the article itself which is free to access until the 31st January 2012.

Exploring the rotational isomerism in non-classical Wells–Dawson anions {W18X}: a combined theoretical and mass spectrometry study
Laia Vilà-Nadal, Scott G. Mitchell, De-Liang Long, Antonio Rodríguez-Fortea, Xavier López, Josep M. Poblet and Leroy Cronin
Dalton Trans., 2012, DOI: 10.1039/C2DT11919F

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)

Lighting the way

Light emitting diodes provide an efficient form of lighting while solar cells give us energy from sunlight. Thienyl carboxylates attached to MM quadruple bonds have shown interesting photophysical properties with potential applications in these areas. Malcolm Chisholm et al. discuss in their Hot Article the electronic properties of four new compounds which are based on Mo and W complexes bound to 5 membered heterocycles containing either O or Se.

The authors thoroughly characterize the complexes, computationally calculate the electronic structures, examine the electronic absorption spectra and steady state emission spectra, use transient absorption spectroscopy and electrochemical studies. The results are very interesting and indicate these complexes may have potential in solar cells given their different electronic states.

For full details of the investigation you can access the full article for free for 4 weeks

Furan- and selenophene-2-carboxylato derivatives of dimolybdenum and ditungsten (MM): a comparison of their chemical and photophysical properties
Samantha E. Brown-Xu, Malcolm H. Chisholm, Judith C. Gallucci, Yagnaseni Ghosh, Terry L. Gustafson and Carly R. Reed
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11889G, Paper

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)