基于偶氮水杨醛酰腙的氰根比色检测探针的合成及性能

Synthesis of Azosalicylic Aldehyde of Benzoyl Hydrazone Based Sensor and It's Colorimetric Sensing Properties for Cyanide Anions in Aqueous Solutions

设计合成了一种基于酚羟基和氨基的酰腙类探针分子,利用紫外-可见吸收光谱和核磁滴定考察了其对F-,Cl-,Br-,I-,CH3COO-,H2PO4-,HSO4-,ClO4-,CN-,SCN-,SO24-和NO3-等阴离子的识别作用.结果表明,当加入CN-离子时主体溶液颜色由无色变为黄色,而加入其它离子时主体溶液颜色不变,说明该探针在DMSO/H2O(体积比5∶5)体系中能选择性裸眼比色检测CN-.核磁滴定及质谱数据表明,该探针与CN-以1∶1化学计量比结合,该过程通过亲核加成方式完成.

A colorimetric anions sensor bearing phenol —OH and —NH groups was synthesized.The binding properties of the receptor with anions such as F^-,Cl^-,Br^-,I^-,CH3COO^-,H2PO^-4,HSO4^-,ClO4^-,CN^-,SCN^-,SO4^2- and NO3^- were examined by UV-Vis and 1H NMR spectra.Upon the addition of CN-anions,the sensor displayed apparent color changes from colorless to yellow while other anions did not cause obvious color changes.The UV-Vis spectroscopic titration experiments and MS data indicated the formation of 1∶ 1 addition compound between CN-and the sensor.The results showed that the sensor in DMSO/H2O（volume ratio 5∶ 5） solution indicated colorimetric single selectivity for CN-which could be observed by naked eyes due to the nucleophilic addition reaction of cyanide.