新型香豆素酮类不对称双光子染料的合成及其光物理性质

doi:10.7517/j.issn.1674-0475.2006.03.187

影像科学与光化学 ›› 2006, Vol. 24 ›› Issue (3): 187-196.DOI: 10.7517/j.issn.1674-0475.2006.03.187

新型香豆素酮类不对称双光子染料的合成及其光物理性质

李雪^1,2, 王涛¹, 赵榆霞¹, 吴飞鹏¹

1. 中国科学院, 理化技术研究所, 北京, 100080;
2. 中国科学院, 研究生院, 北京, 100049

收稿日期:2005-12-07 修回日期:2006-03-09 出版日期:2006-05-23 发布日期:2006-05-23
通讯作者: 吴飞鹏,Tel:82543569;E-mail:fpwu@mail.ipc.ac.cn.
基金资助:
国家自然科学基金资助项目(50173031,50403030)

Synthesis and Photophysical Characteristics of a Novel Two-photon Absorption Unsymmetrical Ketocoumarin

LI Xue^1,2, WANG Tao¹, ZHAO Yu-xia¹, WU Fei-peng¹

1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received:2005-12-07 Revised:2006-03-09 Online:2006-05-23 Published:2006-05-23

摘要/Abstract

摘要： 本文以二苯乙烯和香豆素为共轭桥,二乙氨基为电子给体,羰基为电子受体,合成了一个具有D-π₁-A-π₂-D结构的香豆素酮类双光子染料C3.用紫外-可见光谱、荧光光谱研究了该化合物的光物理性质.发现在光作用下C3很容易发生分子内电荷转移,进而转变为扭曲的分子内电荷转移,产生很大的偶极矩变化.以飞秒脉冲激光为激发光源,用上转换荧光法测定了其双光子吸收截面.在激发波长为850 nm时,新化合物的双光子吸收截面值达1292 GM,比同系列香豆素酮衍生物C1、C2的双光子吸收截面值高一到两个数量级.

关键词: 香豆素酮, 二苯乙烯, 分子内电荷转移, 双光子吸收

Abstract: A novel ketocoumarin derivative C3 presented a Dπ₁-A-π₂-D structure with diethylamino as the electron donor(D),carbonyl as the electron acceptor(A),coumarin and stilbene as the conjugating bridge was synthesized.Its photophysical characteristics were studied using UV-Vis and fluorescence spectra.The result showed that upon excitation compound C3 could form its intramolecular charge transfer state easily and furthermore transform to a twisted intramolecular charge transfer state accompanying with a very large change of dipole moment.The two-photon absorption cross-section of the new compound was measured by the up-converted fluorescence method with femtosecond laser pulses.It was obtained as 1292 GM at 850 nm,which is one to two orders of magnitudes larger than those of the reference compounds C1 and C2.

Key words: ketocoumarin, stilbene, intramolecular charge transfer, two-photon absorption

中图分类号:

李雪, 王涛, 赵榆霞, 吴飞鹏. 新型香豆素酮类不对称双光子染料的合成及其光物理性质[J]. 影像科学与光化学, 2006, 24(3): 187-196.

LI Xue, WANG Tao, ZHAO Yu-xia, WU Fei-peng. Synthesis and Photophysical Characteristics of a Novel Two-photon Absorption Unsymmetrical Ketocoumarin[J]. Imaging Science and Photochemistry, 2006, 24(3): 187-196.

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新型香豆素酮类不对称双光子染料的合成及其光物理性质

Synthesis and Photophysical Characteristics of a Novel Two-photon Absorption Unsymmetrical Ketocoumarin

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