A Red‐Light‐Driven CO‐Releasing Complex: Photoreactivities and Excited‐State Dynamics of Highly Distorted Tricarbonyl Rhenium Phthalocyanines. Issue 48 (20th July 2022)

• Record Type: Journal Article
• Authors: Wang, Mengfei; Murata, Kei; Koike, Yosuke; Jonusauskas, Gediminas; Furet, Amaury; Bassani, Dario M.; Saito, Daisuke; Kato, Masako; Shimoda, Yuushi; Miyata, Kiyoshi; Onda, Ken; Ishii, Kazuyuki
• Is Part Of: Chemistry. Volume 28:Issue 48(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-07-20
• Subjects: carbonyl ligands -- photochemistry -- photophysics -- phthalocyanines -- rhenium; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202200716
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A complex comprising one [Re(CO)3 ] + unit and a phthalocyanine (Pc) ligand (Re1 Pc ) is shown to function as a photo‐induced 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 Re1 Pc and Re2 Pc, 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, that is, unsymmetric coordination of [Re(CO)3 ] + unit(s), one of which was confirmed by single‐crystal X‐ray analysis of a symmetrically substituted Pc with two [Re(CO)3 ] + units. Re1 Pc represents a promising red‐light‐driven photoCORM that can be applied in biological environments or therapeutic applications. Abstract : Designing photoCORMs : A new photo‐induced CO‐releasing molecule has been developed by using tricarbonyl rhenium(I) phthalocyanine. The distorted structures of the Re phthalocyanine complexes allowed their ultrafast excited‐state dynamics to be analysed by spin‐orbit coupling.