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Photoluminescent copolymer‐pendant Ru(BPY) 3 2+ grafted onto non‐woven silk fabric and its application to oxygen sensor
Author(s) -
Kaneko Masao,
Takekawa Toshihiro,
Asakura Tetsuo
Publication year - 1992
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19920590116
Subject(s) - fibroin , copolymer , silk , quenching (fluorescence) , oxygen , polymer chemistry , photoluminescence , materials science , grafting , polymer , oxygen sensor , photochemistry , chemical engineering , chemistry , composite material , fluorescence , organic chemistry , physics , optoelectronics , quantum mechanics , engineering
Copolymer‐pendant Ru(bpy) 3 2+ grafted onto silk fibroin was prepared by at first grafting copoly(4‐methyl‐4′‐vinyl‐2,2′‐bipyridine ‐ methylmethacrylate) onto non‐woven silk fabric, and then by reacting the grafted sample with cis‐Ru(bpy) 2 Cl 2 . Photoluminescence of this silk‐poly Ru complex and its quenching by oxygen were studied in gas, methanol and water phases. The relative emission intensity and the emission lifetime of the silk‐poly Ru showed that there are two kinds of sites for the Ru complex. The major, longer lifetime component (1070 ns, 77.1%, under Ar gas) is considered to be surrounded by polymer matrices, and the minor, shorter one (288 ns, 22.9%) seems to be exposed and is subjected to concentration quenching. The shorter lifetime species are quenched by oxygen more effectively than the longer ones. The mechanism of the quenching by oxygen and its application to oxygen sensor were discussed.