Abstract
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 (trans-bpe). 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.
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