Quenching of fluorescence of conjugated poly(p-phenylene) polymers by benzil and dimethylaminobenzil molecules

Autor:	S. A. Bagnich, V. N. Knyukshto
Rok vydání:	2006
Předmět:	chemistry.chemical_classification Quantitative Biology::Biomolecules Polymer Conjugated system Condensed Matter Physics Photochemistry Excimer Fluorescence Condensed Matter::Soft Condensed Matter chemistry.chemical_compound chemistry Poly(p-phenylene) Molecule Benzil Triplet state Spectroscopy
Zdroj:	Journal of Applied Spectroscopy. 73:846-853
ISSN:	1573-8647 0021-9037
DOI:	10.1007/s10812-006-0165-2
Popis:	We have studied the mechanisms for quenching of the fluorescence of conjugated poly(p-phenylene) polymers by benzil and dimethylaminobenzil molecules. We have shown that molecules in the diketone series are quenching agents for the fluorescence of the indicated polymers, and can serve as singlet-triplet converters capable of populating the triplet state of the polymer. We have observed that the efficiency of quenching of the fluorescence of the studied polymers depends considerably on the presence of bulky side groups in the polymer or in the activator molecules. Based on analysis of the data obtained, we conclude that in the case of a rigid planar structure for the polymer, a significant contribution to quenching of its fluorescence comes from not only singlet-singlet energy transfer but also charge transfer, leading to formation of intermolecular complexes (exciplexes).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::70bf02638b163e0bc81b7832970d59e6 https://doi.org/10.1007/s10812-006-0165-2 Zobrazit plný text záznamu Plný text ve formátu PDF