影像科学与光化学 ›› 1999, Vol. 17 ›› Issue (2): 172-176.DOI: 10.7517/j.issn.1674-0475.1999.02.172

• 研究简报 • 上一篇    下一篇

以芳香硫醚为桥链的三体化合物的荧光分子开关性能

吴永忠1, 张镇平1, 田禾2   

  1. 1. 华东理工大学精细化工研究所, 上海 200237;
    2. 台湾辅仁大学化学系, 台北新庄
  • 收稿日期:1998-09-11 修回日期:1998-12-03 出版日期:1999-05-20 发布日期:1999-05-20
  • 通讯作者: 田禾
  • 基金资助:
    国家自然科学基金资助项目(批准号:29686001)

FLUORESCENCE SWITCH PROPERTIES OF TRIADS WITH SULFUR BRIDGE

WU Yong-zhong1, TIAN He1, ZHANG Zhen-ping2   

  1. 1. Institute of Fine Chemicals, East China University of Science & WTBXTechnology, Shanghai 200237, P.R. China;
    2. Department of Chemistry, Fu Jen Catholic University, Shin Chuang, Taipei
  • Received:1998-09-11 Revised:1998-12-03 Online:1999-05-20 Published:1999-05-20

摘要: 将一些发色团分子组装成具有特定功能的分子器件,是近年来随超分子化学和分子信息科学兴起而十分活跃的领域[1],其中具有逻辑功能的光控开关器件是下一代分子计算机的核心,它们可在分子水平实现信息的存储和数据的处理、传输[2].国内外这方面的研究主要有顺反异构、可逆光致变色(螺吡喃型,俘精酸酐型等)、质子转移异构化、分子手性变化及分子内电荷转移等[3, 4].不难发现目前具有应用背景的主要是围绕可逆光致变色材料进行,其中也包括将光致变色原理应用于光诱导分子内能量传递的开关器件[5].但是,所有基于光致变色思路的研究都存在响应时间慢及检测不方便等问题,难以满足快速光控开关器件的要求.如何从新的思路出发提高响应速度就成为亟待解决的课题.

关键词: 三体化合物, 分子开关, 荧光

Abstract: Several "DonorBridgeAcceptor" triad compounds were synthesized, in which aromatic sulfur compounds (such as disulfide, 9H-thioxanthen-9-one and thianthrene) were used as "bridge". The fluorescence lifetimes of these triads in various solvents were measured by singlephoton counting technique in this paper. Intramolecular Charge Transfer (ICT) between donor and acceptor will be inhibited ("off" state ) with the rapid formation of sulfur radicals by photolysis. The characteristic longer wavelength emission of intramolecular exciplex in these triads was quenched. As the sulfur radicals recovered rapidly, ICT between donor and acceptor return to "on" state equally rapidly.

Key words: triad compound, molecular switch, fluorescence