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A Red Light-Driven CO-releasing Complex: Photochemical and Photophysical Properties of Highly-Distorted Tricarbonyl Rhenium Phthalocyanines
A complex comprising one [Re(CO)3] + unit and a phthalocyanine (Pc) ligand (Re1Pc) is shown to function as a photoinduced CO-releasing molecule (photoCORM) in the presence of O2 and a coordinative solvent under irradiation with red light, which can deeply penetrate living tissues. Transient absorpti...
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Published in: | Chemistry : a European journal 2022, Vol.28 (48) |
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Main Authors: | , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | A complex comprising one [Re(CO)3] + unit and a phthalocyanine (Pc) ligand (Re1Pc) is shown to function as a photoinduced CO-releasing molecule (photoCORM) in the presence of O2 and a coordinative solvent under irradiation with red light, which can deeply penetrate living tissues. Transient absorption spectroscopic measurements indicate very short excited-state lifetimes and ultrafast intersystem crossing for Re1Pc and Re2Pc, which contains two [Re(CO)3] + units. The excited-state properties are ascribed to efficient spin-orbit coupling and large Franck-Condon factors originating from the complexes' distorted structures, i.e., unsymmetric coordination of [Re(CO)3] + unit(s), one of which was confirmed via single-crystal Xray analysis of a symmetrically-substituted Pc with two [Re(CO)3] + units. Re1Pc represents a promising red light-driven photoCORM that can be applied in biological environments or therapeutic applications. |
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ISSN: | 0947-6539 1521-3765 |
DOI: | 10.1002/chem.202200716 |