三苯胺
四氰乙烯
苯乙炔
光化学
化学
接受者
循环伏安法
薗头偶联反应
电子供体
电子受体
电化学
物理化学
有机化学
钯
催化作用
物理
凝聚态物理
电极
作者
Mircea Grigoraş,Teofilia Ivan,Loredana Vacareanu,Ana‐Maria Solonaru,Radu Tigoianu
标识
DOI:10.1016/j.jlumin.2014.02.032
摘要
Three novel triphenylamine-based compounds containing strong electron acceptor groups have been synthesized and their comparative photophysical properties are presented. These compounds were obtained by a two-step method: (i) triphenylamine compounds with one, two and three phenylacetylene arms were synthesized by Sonogashira reaction between iodine-substituted triphenylamines and phenylacetylene, followed by (ii) post-modification of these electron-rich alkynes by addition of the strong electron acceptor, tetracyanoethylene. Characterization of all oligomers was made by FTIR, 1H-NMR, UV–vis and fluorescence spectroscopy. A batochromic shifting of the UV and photoluminescence maxima was observed with the increase of the acceptor group number. The electrochemical behavior was studied by cyclic voltammetry. The cyclic voltammograms have evidenced that triphenylamine-phenylacetylene compounds undergo only oxidation processes while compounds modified with tetracyanoethylene show both oxidation and reduction peaks associated with donor and acceptor groups, respectively. The donor–acceptor compounds coordinate metal ions (i.e., Hg2+ and Sn2+) by cyano groups resulting in the decreasing of charge transfer band intensity, and they can be used as chemosensors.
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