对硝基偶氮邻苯二酚的合成及其对硼酸的选择性识别  

Synthesis and selective recognition of boric acid for 4-[(4-nitrophenyl)azo]-1,2-benzenediol

作　　者：吴小华[1] 徐靓[1] 周炳江[1] 王鑫[1] 王利民[1] 张栋[1] 张蕴[1] 王芳[1] 

机构地区：[1]浙江师范大学化学与生命科学学院,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2011年第3期306-310,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：浙江师范大学实验室开放项目(2010-48)

摘　　要：合成了对硝基偶氮邻苯二酚(主体分子);在pH8.3的EDTA-NaOH介质中,利用紫外-可见吸收光谱法考察了主体分子与硼酸、常见阴离子和阳离子的相互作用.结果表明:主体分子通过邻位酚羟基与硼酸结合形成1∶1的络合物,结合常数为1.5×103L.mol-1,主体分子的吸收光谱发生明显蓝移,溶液颜色由红色变为黄色.常见阴离子、阳离子均未引起主体分子的吸收光谱蓝移及溶液颜色发生明显变化.因此,主体分子对硼酸具有选择性识别作用,可实现裸眼识别,方法简单方便.4-[（4-nitrophenyl）azo]-1,2-benzenediol was synthesized and its reactions with boric acid and some ordinary anions and cations were studied by UV-vis at pH 8.3 EDTA-NaOH.It was found that the title compound formed a complex in 1 ∶1 binding model through the o-hydroxy of phenolic with boric acid and the affinity constant was determined to be 1.5×103 L·mol-1.The process led to a blue shift of the title compound′s absorption spectrum and the solution color turned red to yellow,while addition of ordinary anions or cations didn′t induce such a change.The results showed the title compound could selectively recognize boric acid,easily observed by naked eyes.This method turned out to be simple and convenience.

关 键 词：对硝基偶氮邻苯二酚 硼酸 识别 紫外-可见吸收光谱 

分 类 号：O657.3[理学—分析化学]