Efficient visible light harvesting through fac-[Re(CO)3(R2bpy) (trans-bpe)] plus complexes

Photochemical and photophysical behaviors of fac-[Re(CO)3(R2bpy)(trans-bpe)]+ complexes, R2bpy = 4,4 ' dimethoxycarbonyl-2,2 '-bipyridine (dmcb) or 2,2 '-bipyridine-4,4 '-dicarboxylic acid (dcbH2), were investigated in the sensitization of the trans-cis photoisomerization of coordinated trans-1,2-bis(4-pyridyl)ethylene (transbpe). These complexes exhibit a remarkable and efficient 3ILtrans-bpe sensitization with higher trans-to-cis photochemical quantum yields in comparison to the non-coordinated photoisomerizable ligand. A growing 3MLCTRe -> R2bpy emission was observed as the cis-isomes is formed and no reverse cis -> trans photoisomerization process could be detected under experimental condition.

Automated summary

The photochemical and photophysical behaviors of fac-[Re(CO)3(R2bpy)(trans-bpe)]+ complexes were studied, showing a remarkable and efficient sensitization of trans-cis photoisomerization. The complexes exhibited higher trans-to-cis photochemical quantum yields compared to non-coordinated ligands. As cis-isomers formed, a growing emission of 3MLCTRe -> R2bpy was observed, with no reverse cis-> trans photoisomerization process detected under experimental conditions.