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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 36, Number 1
JKCSEZ 36(1)
February 20, 1992

Title	Fluorescence Characteristics of Copolymer of Styrene-Maleic Acid in Tetrahydrofuran 스티렌-말레산 공중합체의 형광특성
Author	Jae Ryun Yoo, Beom-Gyu Lee, Kang-Jin Kim 유재연, 이범규, 김강진
Keywords
Abstract	스티렌-말레산(PSMA), 스티렌말레산 무수물(PSMAn), 및 스티렌-말레산의 Eu³⁺ 염(PSMA-Eu)의 형광특성을 tetrahydrofuran 용액에서 연구하였다. 스티렌의 몰%가 75%인 PSMA와 PSMA-Eu은 들뜬 이합체의 결합에너지가 50%나 67%에 비해 크게 나타났다. 들뜬이합체-단위체 형광세기의 비로부터 스티렌 단위체의 농도가 8.0 × 10^-3M까지도 분자내 들뜬이합체의 특성을 보였다. 들뜬이합체의 형성메카니즘을 설명하는 기존의 세 가지 모형은 이들 중합체에 대해서는 잘 맞지 않는 듯하다. benzylacetate, mesitylene 및 염소가 치환된 용매들이 들뜬이합체의 형광에 주는 영향을 을 조사하여 그 결과를 몰부피로 해석해 보았다. 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.
Page	100 - 106
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