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KMID : 1059519920360010100
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Journal of the Korean Chemical Society
1992 Volume.36 No. 1 p.100 ~ p.106
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Fluorescence Characteristics of Copolymer of Styrene-Maleic Acid in Tetrahydrofuran
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Yoo Jae-Ryun
Lee Beom-Gyu
Kim Kang-Jin
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Abstract
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The fluorescence characteristics of copolymers of styrene-maleic anhydride(PSMAn), styrene-maleic acid (PSMA), and PSMA complexed with Eu3+ (PSMA-Eu) in tetrahydrofuran were studied. The excimer of PSMA and PSMA-Eu with 75% mole fraction of styrene appears to have larger binding energy than that with 50% or 67% styrene. The ratio of excimer to monomer intensities showed little change with the increase of styrene concentration up to 8.0 × 10-3M, indicating the excimer formation is due to intramolecular process. Three existing mechanisms for intramolecular excimer formation are considered inadequate to explain the observed behavior. The quenching of excimer intensity by benzyl-acetate, mesitylene, and CCl4 is interpreted in terms of the molar volume of quencher.
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KEYWORD
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