摘要
聚集诱导发光(Aggregation-induced emission,AIE)由于在超分子化学、生物学以及材料科学方面起着非常重要的作用而受到人们的广泛关注。为拓展AIE分子在生物机体的内环境或自然环境中的应用,水溶性的AIE分子更是受到高度关注。本工作合成了以二氰基二苯乙烯基苯为发光基元、磺酸基为亲水基元的水溶性AIE分子DCS-SO^(-)_(3),并对其光物理性能进行了研究。光谱实验结果表明,DCS-SO^(-)_(3)能够以水作为良溶剂,并伴随着四氢呋喃的加入呈现聚集诱导发光的性质。同时,由于磺酸基具有可逆结合质子的能力,DCS-SO^(-)_(3)可在酸性环境中结合H+发生质子化,以DCS-SO3H形式存在;在碱性环境中脱去质子,以DCS-SO^(-)_(3)的形式存在。因此,DCS-SO^(-)_(3)是一种具有AIE性质和pH响应性能的新型亲水性材料。
Aggregation-induced emission(AIE)luminogens have attracted considerable attention for its important role in supramolecular chemistry,biology and materials science,especially,those with water-solubility which were highlighted because of the application in the internal environment of biological organism or natural environment.In this work,a water-soluble AIE molecule(DCS-SO^(-)_(3))with dicyanodistyrylbenzene(DCS)as the luminescent moiety and sulfonic group as the hydrophilic unit was synthesized,and its optical properties were systematically studied.Spectroscopic studies suggested that the addition of the poor solvent acetonitrile to the aqueous solution caused the formation of DCS-SO^(-)_(3) nanoparticles and the AIE phenomena were demonstrated.Furthermore,as the sulfonic group has the ability to bind protons reversibly,the absorption peaks of DCS-SO^(-)_(3) were blue-shift after the addition of acid.Moreover,the color change process was reversible upon pH change.By making use of the AIE property and chemical reactivity towards OH-/H+,DCS-SO^(-)_(3) is able to respond pH within the pH range from 1 to 13 by showing different emission colors and intensities:strong to weak blue emission within the pH range from 1 to 7 and weak blue emission to strong orange emission within the pH range from 8 to 13.According to AIE mechanism,the reason for pH-mediated optical properties of DCS-SO^(-)_(3) was studied.Therefore,DCS-SO^(-)_(3) is a new material with the AIE and pH-responsive properties.
作者
王嘉慧
曾晓璇
吴玥
吕旭晨
任相魁
余振强
WANG Jia-hui;ZENG Xiao-xuan;WU Yue;LYU Xu-chen;REN Xiang-kui;YU Zhen-qiang(State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518037, China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2021年第3期311-318,共8页
Chinese Journal of Luminescence
基金
国家自然科学基金(21875157)
化学工程联合国家重点实验室开放课题(SKL-ChE-20B04)资助项目。
关键词
聚集诱导发光
PH响应
二氰基二苯乙烯基苯
酸碱调控
aggregation-induced emission
pH-responsive
dicyanodistyrylbenzene
acid-base regulation
作者简介
王嘉慧(1995-),女,上海人,硕士研究生,2017年于华侨大学获得学士学位,主要从事手性液晶材料的制备及其圆偏振发光和相变行为的研究,E-mail:JiahuiWang0802@163.com;通讯作者:任相魁(1980-),男,河北邢台人,博士,副教授,2010年于南开大学获得博士学位,主要从事小分子及高分子材料的晶体结构和光电性质的研究,E-mail:renxiangkui@tju.edu.cn,2010年于南开大学物理学院获得理学博士学位,2007—2009年,美国Akron大学高分子科学与工程学院公派联合培养,2010—2012年,北京大学化学与分子工程学院博士后,2012年12月开始在天津大学化工学院高分子系工作,研究方向为有机小分子及高分子材料的晶体结构、液晶结构及光电性质,研究范围涉及晶体/液晶发光材料、非线性光学、聚集诱导发光、传感器等,至今已在Angewandte Chemie International Edition,Chemical Society Reviews等期刊发表SCI论文50余篇。
