期刊
JOURNAL OF LUMINESCENCE
卷 185, 期 -, 页码 23-33出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2017.01.002
关键词
Boron difluoride beta-diketonate; Functionalization of polystyrene; Luminescence; Excimer; Exciplex
类别
资金
- Program of fundamental researches of FEB RAS 'Far East' [15-1-3-027, 0265-20150017]
In the present study, a new synthetic method for the functionalization of polystyrene (PS) and (styrene methyl methacrylate) copolymer has been developed. Using the new method, polymers containing BF2-benzoylacetonate groups have been obtained through double acylation by acetic anhydride with boron trifluoride. Luminescence of the produced polymers in solutions and films has been studied. Quantum yields of polymer solution luminescence are significantly higher than those of the low -molecular -weight analog-boron difluoride benzoylacetonate. For the polymer, in which styrene fragments are separated by methyl methacrylate groups, at low concentrations of the polymer in solution one observes the monomer luminescence of BF2-benzoylacetonate groups, while at high concentrations- the excimer luminescence. In case of PS-based polymers, in which BF2-benzoylacetonate groups and phenyl rings are not separated, in diluted solutions one observes the fluorescence of the intramolecular exciplexes, while at the concentration increase-the luminescence of intermolecular exciplexes. The ability of excimer formation is responsible for the increased photostability of the produced polymers.(C) 2017 Elsevier B.V. All rights reserved.
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