Synthesis and Properties of Fluorescence Dyes: Tetracyclic Pyrazolo[3,4-<i>b</i>]Pyridine-Based Coumarin Chromophores with Intramolecular Charge Transfer Character
作者:Jianhong Chen、Weimin Liu、Jingjin Ma、Haitao Xu、Jiasheng Wu、Xianglin Tang、Zhiyuan Fan、Pengfei Wang
DOI:10.1021/jo3002722
日期:2012.4.6
diffraction. The photophysical, electrochemical, and thermal properties of these compounds were investigated by absorption spectroscopy, fluorescence spectroscopy, single photon counting technique, cyclic voltammetry, thermogravimetric analysis, etc. Results show that the compounds exhibited high fluorescence quantum yields and good electrochemical, thermal, and photochemical stabilities. In addition, the
通过3-醛-7-二乙基氨基香豆素(5)或3-乙酰基-7-二乙基氨基香豆素(6)和5-氨基吡唑之间的简便反应,合成了两个系列的新的基于四唑并[3,4- b ]吡啶基的香豆素发色团。一锅法中的导数(7)。从化合物5和6获得了不同的缩合产物,并利用5与5-氨基-1-苯基吡唑(7a)。分子结构通过NMR和HRMS表征,并通过X射线衍射证实。通过吸收光谱,荧光光谱,单光子计数技术,循环伏安法,热重分析等方法研究了这些化合物的光物理,电化学和热性质。结果表明,这些化合物具有较高的荧光量子产率,并具有良好的电化学,热和化学性质。光化学稳定性。此外,还通过激光扫描共聚焦显微镜探索了这些高荧光化合物在活细胞成像中的应用。
Turn-on fluorescence sensor based on the aggregation of pyrazolo[3,4-b]pyridine-based coumarin chromophores induced by Hg2+
作者:Jianhong Chen、Weimin Liu、Ying Wang、Hongyan Zhang、Jiasheng Wu、Haitao Xu、Weigang Ju、Pengfei Wang
DOI:10.1016/j.tetlet.2013.09.052
日期:2013.11
We developed a new fluorescent sensor (PPC-S) for Hg2+ based on the aggregation-induced emission (AIE) of pyrazolo[3,4-b]pyridine-based coumarin chromophore (PPC-O). Given the desulfurization reaction with Hg2+, AIE inactive PPC-S can be transformed into PPC-O with AIEactivity, which can be employed for the fluorescence turn-on detection of Hg2+ with satisfactory selectivity and sensitivity in aqueous
我们基于吡唑并[3,4- b ]吡啶基香豆素发色团(PPC-O)的聚集诱导发射(AIE),开发了一种用于Hg 2+的新型荧光传感器(PPC-S)。鉴于与Hg 2+的脱硫反应,AIE失活的PPC-S可以转化为具有AIE活性的PPC-O,可用于在水溶液中以令人满意的选择性和灵敏度进行Hg 2+的荧光导通检测。