• 更多栏目

    刘迪

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:中科院理化所
    • 学位:博士
    • 所在单位:化学学院
    • 学科:有机化学
    • 办公地点:化工综合楼C501
    • 联系方式:liudi@dlut.edu.cn
    • 电子邮箱:liudi@dlut.edu.cn

    访问量:

    开通时间:..

    最后更新时间:..

    A Single 2-(2 '-Hydroxyphenyl)benzothiazole Derivative Can Achieve Pure White-Light Emission

    点击次数:

    论文类型:期刊论文

    发表时间:2014-11-01

    发表刊物:CHEMISTRY-AN ASIAN JOURNAL

    收录刊物:EI、PubMed、SCIE、Scopus

    卷号:9

    期号:11

    页面范围:3215-3220

    ISSN号:1861-4728

    关键字:charge transfer; enols; fluorescence; hydrogen bonds; photophysics

    摘要:The synthesis and photophysics of two novel 2-(2'-hydroxyphenyl)-benzothiazole (HBT) derivatives are presented. The electron-withdrawing trifluoromethyl (CF3) group in compound 1 facilitates the deprotonation of the phenolic hydroxy group. Well-resolved triple fluorescence from the enol, keto, and phenolic anion, which ranges from 350 to 600 nm, was detected for 1 in ethanol, which marks the first time triple fluorescence from an excited-state intramolecular proton transfer (ESIPT) molecule has been reported. Both triphenylamine and CF3 were introduced into derivative 2. Intramolecular charge transfer and the "red-edge effect" resulted in the bathochromic shift of dual fluorescence of 2. Triple fluorescence was also observed for 2 in ethanol. In mixed acetonitrile and ethanol, pure white-light emission with CIE coordinates of (0.33, 0.33) and a quantum yield of 0.25 was achieved for 2. This work provides a new avenue for the rational design of an ESIPT molecule to achieve white-light generation under mild conditions.