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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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Bibliographic Details
Published in:Chemistry : a European journal 2022, Vol.28 (48)
Main Authors: Wang, Mengfei, Murata, Kei, Koike, Yosuke, Jonusauskas, Gediminas, Furet, Amaury, Bassani, Dario, Saito, Daisuke, Kato, Masako, Shimoda, Yuushi, Miyata, Kiyoshi, Onda, Ken, Ishii, Kazuyuki
Format: Article
Language:English
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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.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.202200716