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Ultrafast intramolecular charge transfer in tetrapyrazinoporphyrazines controls the quantum yields of fluorescence and singlet oxygen
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SYSNO ASEP 0342767 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ultrafast intramolecular charge transfer in tetrapyrazinoporphyrazines controls the quantum yields of fluorescence and singlet oxygen Author(s) Nováková, V. (CZ)
Zimčík, P. (CZ)
Miletín, M. (CZ)
Váchová, L. (CZ)
Kopecký, K. (CZ)
Lang, Kamil (UACH-T) SAI, RID, ORCID
Chábera, P. (CZ)
Polívka, T. (CZ)Source Title Physical Chemistry Chemical Physics. - : Royal Society of Chemistry - ISSN 1463-9076
Roč. 12, č. 11 (2010), s. 2555-2563Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords photoinduced electron-transfer ; phthalocyanine-fullerene ensembles ; nonlinear-optical properties Subject RIV CA - Inorganic Chemistry R&D Projects GA203/07/1424 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000275186700005 DOI 10.1039/b918546a Annotation A series of octasubstituted zinc(II) tetrapyrazinoporphyrazines (TPyzPz), aza-analogues of phthalocyanines, differing in the number of peripheral N,N-diethylamino (n = 0-8) and tert-butylsulfanyl substituents (m = 8 - n) has been synthesized. All possible congeners were characterized including adjacent and opposite isomers. Steady-state (UV-vis, fluorescence) and time-resolved (fluorescence, femtosecond transient absorption) spectroscopies, redox and photochemical (singlet oxygen formation) properties were investigated and compared. The peripheral tertiary amino substituents (donor) induce a new competitive relaxation pathway to fluorescence and intersystem crossing due to the mixing of the first excited state S-1 of the TPyzPz macrocycle with a nearby intramolecular charge transfer (ICT) state. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2011
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