Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter at the nanoscale. We do this by exploring ways to shape light and its environment. It's what we call active and passive control. Our current focus is on the interaction of light with biomolecules and nanostructures. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
We participate in the EU-COST actions MP1102: Coherent Raman microscopy (MicroCor) and CM1202: Supramolecular photocatalytic water splitting (PERSPECT-H2O)


Supramolecular Bimetallic Assemblies for Photocatalytic Hydrogen Generation from Water

(full pdf)

Tanja Kovacs, Qing Pan, Philipp Lang, Laura O’Reilly, Sven Rau, Wesley R. Browne, Mary T. Pryce, Annemarie Huijser, and Johannes G. Vos
Faraday Discussions
issue 185, p143 - 170 dec. 1, 2015
ext. link

A series of supramolecular assemblies of the type [Ru(L-L)2(L'-L)MX2)]n+ are reported where L-L is 2,2'-bipyridine (bipy) 4,4'- di-tetra-butyl-bipyridine (tbbipy) or 4,4'-diethoxycarbonyl-2,2'-bipyridine (dceb) and L-L' is tetrapyrido[3,2-a:2',3'-c:3",2"- h:2'",3'"-j]phenazine (tpphz), 2,2':5',2"-terpyridine (2,5-bpp), 2,2':6',2"-terpyridine, (2,6-bpp), 2,5-di(pyridine-2- yl)pyrazine (2,5-dpp) or 2,3-di(pyridine-2-yl)pyrazine (2,3-dpp), and MX2 is PdCl2, PtCl2 or PtI2. The photocatalytic behaviour with respect to hydrogen generation of these compounds and their ultrafast photophysical properties are discussed as a function of the nature of the peripheral ligands, the bridging ligands and the catalytic centre. The results obtained show how differences in the chemical composition of the photocatalysts can affect intramolecular photoinduced electron transfer processes and the overall photocatalytic efficiency.
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