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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Ultrafast intramolecular charge transfer in tetrapyrazinoporphyrazines controls the quantum yields of fluorescence and singlet oxygen Tvůrce(i) 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)Zdroj.dok. Physical Chemistry Chemical Physics. - : Royal Society of Chemistry - ISSN 1463-9076
Roč. 12, č. 11 (2010), s. 2555-2563Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova photoinduced electron-transfer ; phthalocyanine-fullerene ensembles ; nonlinear-optical properties Vědní obor RIV CA - Anorganická chemie CEP GA203/07/1424 GA ČR - Grantová agentura ČR CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000275186700005 DOI 10.1039/b918546a Anotace 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. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2011
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