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Fluorescence characteristics of europium ions stabilized in solid polymer electrolytes containing polyether structure
Author(s) -
Ohno Hiroyuki,
Lau Sim Peng
Publication year - 1991
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1991.220020209
Subject(s) - europium , materials science , fluorescence , electrolyte , ion , polymer electrolytes , polymer , fast ion conductor , chemical engineering , inorganic chemistry , chemistry , luminescence , organic chemistry , electrode , composite material , ionic conductivity , optics , optoelectronics , physics , engineering
Polyethylene oxide (PEO) oligomers can dissolve lanthanide salts. The terminal hydroxyl groups of PEO affect the solubility of the lanthanide salts in the PEO considerably. However, no intensive fluorescence was observed from Eu 3+ dispersed in PEO or other ion‐conductive polymers containing terminal hydroxyl groups, because of the quenching effect of the terminal hydroxyl groups. Copolymer of ω‐methoxy oligo(oxyethylene) methacrylate and methyl methacrylate (P(MEOM‐co‐MMA)) could dissolve small amount of Eu(NO 3 ) 3 , but the copolymer film containing Eu 3+ shows intensive fluorescence (Ex = 269.0 nm, Em = 570.0 nm). This was prepared as a soft film, and there was a clear dependence of the Eu 3+ concentration on the fluorescence intensity. A linear relation between the film thickness and the fluorescence intensity was also observed. Little fluorescence was found for Eu 3+ in the blend of the corresponding two homopolymers, i.e. poly‐(ω‐methoxy oligo (oxyethylene) methacrylate) (PMEOM) and poly(α‐methyl methacrylate) (PMMA). This strongly suggests that intensive fluorescence requires a mixed state of MEOM and MMA units at molecular level.