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Issue 35, 2014
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Supramolecular activation of a molecular photocatalyst

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The effects of the planar aromatic organic molecules anthracene and pyrene on the catalytic performance of the intramolecular hydrogen evolving photocatalyst [Ru(tbbpy)2(tpphz)PdCl2](PF6)2 functioning as a photocatalytic dyad have been studied. 1H-NMR studies on [Ru(tbbpy)2(tpphz)PdCl2](PF6)2 and [Ru(tbbpy)2(tpphz)](PF6)2 show a pronounced interaction of pyrene with the ruthenium complexes due to π–π-interactions. The solid state structure of [Ru(tbbpy)2(tpphz)PdCl2]2[Mo8O24] shows a pronounced π–π-stacking of the polyaromatic ligands. In addition, dimerization constants for the complexes and association constants between the complexes and pyrene were determined. Studies on the photocatalytic hydrogen production show a decreased induction phase and increased turn over frequencies during the initial phase of the catalysis in the presence of anthracene and pyrene utilising the catalyst [Ru(tbbpy)2(tpphz)PdCl2](PF6)2 irrespective of the nature of the polycyclic aromatic hydrocarbon.

Graphical abstract: Supramolecular activation of a molecular photocatalyst

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The article was received on 13 Mar 2014, accepted on 08 Jul 2014 and first published on 14 Jul 2014

Article type: Paper
DOI: 10.1039/C4DT00761A
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Citation: Dalton Trans., 2014,43, 13307-13315

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    Supramolecular activation of a molecular photocatalyst

    M. G. Pfeffer, C. Pehlken, R. Staehle, D. Sorsche, C. Streb and S. Rau, Dalton Trans., 2014, 43, 13307
    DOI: 10.1039/C4DT00761A

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