Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 418, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2021.113402
Keywords
Efficient visible sensitization; Stilbene-like ligand; Rhenium(I) tricarbonyl complex trans-cis photoisomerization
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Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Conselho Nacional de Desenvolvi-mento Cientifico e Tecnologico (CNPq)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
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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.
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.
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