基于四氧杂四烯衍生物荧光增强的苯酚传感器

An Optical Chemical Sensor for Phenol Based on fluorescence Enhancement of 2,2,7,7,12,12,17,17-Octamethyl-21,22,23,24-tetraoxaquaterene

苯酚对固定在增塑的聚氯乙烯（ＰＶＣ）敏感膜中的２，２，７，７，１２，１２，１７，１７－八甲基－２１，２２，２３，２４－四氧杂四烯（ＴＯＥ）有可逆荧光增强作用，据此研制了测定水溶液中苯酚含量的荧光化学传感器。该敏感膜最佳组成为：５０ｍｇ ＰＶＣ、１００ｍｇ癸二酸二异辛脂（ＤＯＳ）、１．５ ｍｇ ＴＯＥ。该传感器在ｐＨ７．４的 Ｔｒｉｓ／ＨＣｌ缓冲溶液中，对苯酚的线性响应范围为４．４７×ｌ０^（－６）～４．１７×１０^（－３）ｍｏｌ／Ｌ；检出限为６．３０×ｌ０^（－７）ｍｏｌ／Ｌ；其响应时间小于３０ｓ。该传感器具有良好的重现性、可逆性和选择性，常见阴离子和阳离子不干扰测定。该传感器应用于工业废水中苯酚含量的测定，结果满意。

An optical chemical sensor for phenol based on reversible fluorescence enhancement of 2,2,7,7,12,12, 17, 17-octamethyl-21,22,23,24-tetraoxaquaterene (TOE) immobilized in a plasticized polyvinyl chloride ( PVC) membrane has been developed. The optimum membrane of the sensor consists of 50 mg of PVC, 100 mg of bis (2-ethylhexyl) sebacate (DOS) and 1.5 mg of TOE. The maximum response of the optode membrane for-phenol was obtained in Tris/HCl buffer solution (pH 7.4). With the optimum conditions described, the proposed sensor responds linearly in the measuring range of 4.47x10(-6) to 4.17x10(-3) mol/L phenol, and has a detection limit of 6.30x10(-7) mol/L. The response time of the sensor is less than 30 s. In addition to high reproducibility and reversibility of the fluorescence signal, the sensor also exhibits good selectivity. Some common anions and cations do not interfere. It was applied for the determination of phenol in a sample of industrial waster with satisfactory result.