We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Tuning Photochemical and Photophysical Properties of P(V) Phthalocyanines.
- Authors
Safonova, Evgeniya A.; Kolomeychuk, Filipp M.; Gvozdev, Daniil A.; Tsivadze, Aslan Yu.; Gorbunova, Yulia G.
- Abstract
The ability of P(V) phthalocyanines (Pcs) for efficient singlet oxygen (SO) generation was demonstrated for the first time by the example of unsubstituted and α- and β-octabutoxy-substituted P(V)Pcs with hydroxy, methoxy and phenoxy ligands in the apical positions of the octahedral P centre. Variation of substituents in Pc ring and P(V) axial ligands allows careful tuning of photophysical and photochemical properties. Indeed, a combination of BuO groups in the β-positions of the Pc ring and PhO groups as axial ligands provides significant SO generation quantum yields up to 90%; meanwhile, the values of SO generation quantum yields for others investigated compounds vary from 27 to 55%. All the complexes, except α-substituted P(V)Pc, demonstrate fluorescence with moderate quantum yields (10–16%). The introduction of electron-donating butoxy groups, especially in the α-position, increases the photostability of P(V)Pcs. Moreover, it has been shown in the example of β-BuO-substituted P(V) that the photostability depends on the nature of axial ligands and increases in the next row: OPh < OMe < OH. The presence of oxy/hydroxy axial ligands on the P(V) atom makes it possible to switch the photochemical and photophysical properties of P(V)Pcs by changing the acidity of the media.
- Subjects
FLUORESCENCE yield; REACTIVE oxygen species; PHTHALOCYANINES
- Publication
Molecules, 2023, Vol 28, Issue 3, p1094
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules28031094