American Chemical Society
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Cross-linked Polymers with Exceptionally High Ru(bipy)32+ Loadings for Efficient Heterogeneous Photocatalysis

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journal contribution
posted on 2012-03-02, 00:00 authored by Jin-Liang Wang, Cheng Wang, Kathryn E. deKrafft, Wenbin Lin
Phosphorescent cross-linked polymers 1 and 2 were synthesized via oxidative homocoupling reactions of tetra­(ethynyl) derivatives of Ru­(bpy)32+ (with the alkynyl groups located at 4,4′- or 5,5′- positions of two substituted bipyridines). These cross-linked polymer particles contain exceptionally high Ru­(bpy)32+ loadings and serve as highly efficient and reusable heterogeneous photocatalysts for a range of organic transformations, presumably owing to the ability of the Ru­(bpy)32+ moieties in the polymer network to transport triplet excited states to particle surfaces to initiate the organic reactions. This work illustrates the potential of developing photocatalytic cross-linked polymers from photoactive molecular building blocks for solar energy utilization.