The group from Nottingham demonstrated the use of MOFs to examine the photoactive units of metal diimine complexes. They investigated the nature of excited states and the formation of reactive intermediates of Re(diimine)(CO)3Cl and Mn(diimine)(CO)3X (X=Br, Cl) species. The MOFs were designed so that the localised centre of the complex could be defined before and potentially during and after excitation, and so that any localised changes around the complex would not affect the overall framework structure.
“We were able to observe photoisomerization of Mn(diimine)(CO)3Cl despite initially poor crystal quality which was degraded even further by the photo-excitation process. This is important because it has much wider ramifications in studying what happens when molecules in a crystal lattice are excited, providing a full three dimensional picture of the excited molecule. We have shown that this approach can be applied to a wide range of small molecules, and it opens possibilities of using MOFs to host short-lived species, prolonging their lifetimes and potentially giving enhanced insights into the nature of intermediate species.”
Professor Sandy Blake, the Nottingham-based crystallographer and part of the research team.
Photoreactivity examined through incorporation in metal−organic frameworks
Alexander J. Blake, Neil R. Champness, Timothy L. Easun, David R. Allan, Harriott Nowell, Michael W. George, Junhua Jia & Xue-Zhong Sun
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