A study on the energy transfer and migration in the molecules of polymeric triplet sensitizers: (2) A study on delay fluorescence and polarization spectra

Autor:	Gao Jian-Ping, Wu Shih-Kang, Feng Xinde, Tong Zheng-He
Rok vydání:	1986
Předmět:	chemistry.chemical_classification chemistry.chemical_compound Intersystem crossing chemistry Copolymer Benzophenone Molecule General Chemistry Polymer Chromophore Photochemistry Phosphorescence Fluorescence
Zdroj:	Acta Chimica Sinica. 4:203-208
ISSN:	0256-7660
DOI:	10.1002/cjoc.19860040304
Popis:	The triplet energy migration of polymers and copolymers of vinyl benzophenone (VBP) and vinyl naphthalene (VN) has been studied by measuring delayed fluorescence and polarization spectra in glassy dilute solution at 77 K. Strong delayed fluorescence of PVN proves the existence of triplet energy migration and T-T annihilation in the polymer chain. Efficient intersystem crossing of “BP” and efficient energy migration and transfer between chromophores along the polymer chain result in the absence of delayed fluorescence for copolymer P (VN-VBP) studied in this work. The order of benzophenone phosphorescence intensity: BP>Co (VBP-St)>PVBP indicates the T-T annihilation decreasing the phosphorescence of PVBP. Fluorescence and phosphorescence polarization data of polymers are smaller than that of their model compounds. It is evident that energy migration exists in the polymer chain.
Databáze:	OpenAIRE
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