以邻苯二甲酸结构与四苯基乙烯核心构筑点亮型Pb^(2+)与Al^(3+)荧光传感器  

Construction of turn-on mode fluorescent sensor for Pb^(2+)and Al^(3+)with structure of phthalic acid and tetraphenylethylene core

作　　者：刘静 董永强 Jing Liu;Yong Qiang Dong(Beijing Key Laboratory of Energy Conversion and Storage Materials,College of Chemistry,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京师范大学化学学院,能量转换与存储材料北京市重点实验室,北京100875

出　　处：《科学通报》2022年第20期2405-2412,共8页Chinese Science Bulletin

基　　金：国家自然科学基金(51773020)资助。

摘　　要：铅和铝在生产生活中的广泛使用会造成环境及水体污染而危害人类健康,对环境及生物体中Pb^(2+)和Al^(3+)的实时监测有重要的意义.荧光探针可对金属离子实现高灵敏度、实时快速检测.传统的荧光分子易发生聚集淬灭而影响荧光探针的性质,而以具有聚集诱导发光性质的荧光分子为核心,可设计合成高灵敏度的点亮型荧光探针.本文以邻苯二甲酸结构为电子受体,以四苯基乙烯(tetraphenylethylene,TPE)为核心,构筑了两个具有不同电子给体结构的水溶性点亮型Pb^(2+)和Al^(3+)荧光探针,具有强电子给体的探针与被检测物作用后发出更长波长的荧光.研究了两种荧光探针的检测灵敏度和抗干扰性,探究了其检测机理,两个荧光探针对Al的检出限均低于世界卫生组织(WHO)饮用水中Al含量标准.Lead is one of the most hazardous metals to humans.It accumulates in liver,kidney and central nervous system,and interferes with a variety of physiological processes such as biosynthesis of hemoglobin.Lead is especially dangerous for children,causing mental retardation.Aluminum has an important role in Alzheimer’s disease,Parkinson’s disease,bone softening,chronic renal failure.However,both lead and aluminum are widely used in industrial applications and daily life.The limits of Pb^(2+)and Al^(3+)for drinking water according to the World Health Organization(WHO)standard are 0.5 and 7.41µmol/L respectively.Thus,it is necessary to develop real-time and rapid detection of Pb^(2+)and Al^(3+).Fluorescent probes are favored by researchers because of their high sensitivity and selectivity,rapid real-time monitoring and potential application in biological systems.The emission of the traditional panel-like chromophore is weakened or even quenched at high concentration or aggregation,while at low concentration,it exhibits low sensitivity and is easy to photobleaching.Tang and coworkers noticed that some luminogens with twisted conformations are nearly nonemssive in solution but exhibit boosted emission in aggregate states,thus,Tang coined this phenomenon as aggregation induced emission(AIE).With the disclosure of the AIE mechanism of restriction of motion(RIM),many AIE active luminogens have been developed.Some turn-on mode fluorescent sensors for Pb^(2+)and Al^(3+)have also been reported based on AIE mechanism,but few of them worked in pure water.Two water-soluble fluorescent sensors are constructed using phthalic acid structure as electron acceptor and tetraphenylethylene as core:4,4′-(2,2-diphenylethene-1,1-diyl)diphthalic acid(1)and 4,4′-(2,2-bis(4-(dimethylamino)phenyl)ethene-1,1-diyl)diphthalic acid(2).Both 1 and 2 are nearly nonemissive in solution,but their solids are highly luminescent with quantum yield of 17.1%and 7.3%.Emission of 1 and 2 in water in the presence of KOH is turned on upon addition of Pb^

关 键 词：聚集诱导发光(AIE) Pb^(2+) Al^(3+) 荧光探针 邻苯二甲酸 

分 类 号：O657.3[理学—分析化学] TP212[理学—化学]