基于吲哚克酮酸染料的Ag^+比色/荧光识别探针  

Indolium Croconine-Based Colorimetric and Fluorescent Chemosensor for Detecting Ag^+

作　　者：王苏[1] 李忠玉[1] 赵宝丽[1] 徐松[1] 张复实[2] 

机构地区：[1]江苏省绿色催化材料与技术重点实验室,常州大学石油化工学院,江苏常州213164 [2]清华大学化学系,北京100084

出　　处：《精细化工》2014年第12期1512-1516,共5页Fine Chemicals

基　　金：国家自然科学基金资助项目(20773077)~~

摘　　要：以纳米氧化铜为催化剂合成了克酮酸,将它与2,3,3-三甲基-3H-吲哚经缩合反应得到吲哚克酮酸染料(ICR),利用紫外-可见(UV-Vis)吸收光谱考察了其对Na+、K+、Mg2+、Ca2+、Ni2+、Mn2+、Zn2+、Ag+和Ba2+的阳离子识别作用。结果表明,当加入Ag+时,ICR的乙醇-水溶液〔V(C2H5OH)∶V(H2O)=4∶1〕吸光度降低,且溶液颜色由橄榄绿色变为橘黄色,而加入其他阳离子则无变化。研究了Ag+对ICR的乙醇-水溶液〔V(C2H5OH)∶V(H2O)=4∶1〕荧光发射光谱的影响,同样发现只有Ag+能使其荧光猝灭,显示了ICR对Ag+具有较高的选择性及灵敏性。此外,通过循环伏安法和1HNMR探究了该化合物对Ag+的识别作用机理。Indole croconium dye was obtained by condensation reaction between 2, 3, 3- trimethylindolenine and croeonic acid which was previously prepared using copper oxide as catalyst. The binding properties of the receptors with cations such as Na ^＋ , K^＋ , Mg^2＋ , Ca^2＋ , Ni^2＋ , Mn^2＋ , Zn^2＋ , Ag^＋ and Ba^2＋ were investigated by UV-Vis spectroscopy. The results show that the absorbanee obviously decreased upon the addition of Ag^＋ into ICR ethanol/water （ volume ratio 4 ： 1 ）. Moreover, there was a clear color change from olive green to orange. Meanwhile,the fluorescence spectra of ICR ethanol/water（ volume ratio 4：1 ） were investigated by adding Ag ＋ ion of increasing concentration. It was found that the fluorescence strength of ICR ethanol/water（ volume ratio 4：1 ） was quenched. The results indicate that ICR exhibited highly selective and sensitive recognition towards Ag^＋. The cyclic voltammetry and ^1HNMR were also used for the recognition study of ICR to transition metal ions.

关 键 词：克酮酸 吲哚克酮酸染料 银离子 阳离子识别 荧光光谱 特种染料与颜料 

分 类 号：TQ57[化学工程—精细化工]