新荧光试剂双(2-苯并噻唑重氮氨基)-3,3′,5,5′-四甲基联苯的合成及其分析应用  

Synthesis and Application of Bis(2-benzothiazolydiazoamino)3,3′,5,5′-Tetramethylbiphenyl

作　　者：廖雪明[1] 冯锋[1] 陈泽忠[2] 

机构地区：[1]南昌大学化学系,南昌330047 [2]大同大学化学系,大同037009

出　　处：《高等学校化学学报》2006年第5期863-866,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20575057);山西省自然科学基金(批准号:20051031);山西省重点学科建设基金资助

摘　　要：将3，3′，5，5′-四甲基联苯胺和苯并噻唑类试剂结合，并引入杂环三氮烯结构，合成了新荧光试剂双（2-苯并噻唑重氮氨基）-3，3′，5，5′-四甲基联苯（BBTDTMB），其结构经红外光谱、核磁共振谱和元素分析证实．研究结果表明，在碱性介质中，该试剂在λex/λen=342nm／420nm处产生强荧光，并且Ag（Ⅰ）对其荧光有很好的猝灭作用，因而建立了BBTDTMB测定Ag（Ⅰ）的新荧光分析方法．该方法的线性范围为1．0～240μg／L，检测限为0．5μg／L，应用于人发、茶叶中的AS（Ⅰ）的测定，结果令人满意。With the aid of combining 3,3′,5,5′-tetramethylbiphenyl with benzothiazole through triazene group, a new fluorescent reagent bis （ 2-benzothiazolydiazoamino ） -3,3′,5,5′-tetramethylbiphenyl （BBTDTM B ） was synthesized. The product was confirmed by means of elemental analysis, ^1H NMR and infrared spectra. Its excitation and emission wavelengths were 342 nm and 420 nm in a basic medium, respectively. This new reagent reacts with Ag（ Ⅰ ） in a slightly basic medium to form a 1：2 complex, by which silver ion causes the fluorescence quenching of the new fluoresent reagent. The reaction showed a high selectivity and a high sensitivity for Ag（ Ⅰ ）. A new spectrofluorimetric method for the determination of trace Ag（ Ⅰ ） with this reagent was developed. The linear range of determination for Ag （ Ⅰ ） was 1.0-240 μg/L with a detection limit of O. 5 μg/L. The method is a selective, sensitive, and simple analytical procedure, and was used for the determination of trace Ag（ Ⅰ ） in hair and tea with satisfactory results.

关 键 词：双(2-苯并噻唑重氮氨基)-3 3′ 5 5′-四甲基联苯 荧光猝灭 银离子检测 

分 类 号：O626[理学—有机化学]