水杨醛衍生物激发态下的质子转移过程及在荧光探针领域的应用  

Excited State Intramolecular Proton Transfer of Salicylaldehyde Derivatives and Its Application in Fluorescent Probe Field

作　　者：李学颖[1] 陈延明[1] 崔娜[1] 张万宇[1] 王志明[1,2] 

机构地区：[1]沈阳工业大学石油化工学院,辽阳111003 [2]香港科技大学深圳研究院,深圳518000

出　　处：《高等学校化学学报》2017年第3期448-455,共8页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51673118);深圳市科技计划项目(批准号:JCYC20160428150429072)资助~~

摘　　要：从电子结构控制理论出发,通过在酚羟基对位引入吸电子取代基团稳定水杨醛中激发态的酮式构象,制备了目标化合物5-对氰基苯基-水杨醛(CN-SA).光谱测试结果显示,CN-SA表现出典型的ESIPT态荧光分子特性,而且辐射跃迁过程的酮式分配比例显著提高,荧光强度和颜色变化明显.CN-SA的荧光光谱不但能够对外围溶剂环境进行选择性识别,而且对溶解和聚集过程(聚集效应)及外围氢键形成能力的变化(pH效应和阴离子效应)等具有特异性响应,其变化可以定量表达.CN-SA仅通过结构微调即实现醇-酮构象的显著变化,可作为一个简单的多重刺激响应型荧光探针.According to the electronic structure control theory, the electron withdrawing substituent was intro- duced to the para-positon of phenol hydroxyl group to stable the ketone conformation, and the target com- pound, 2-hydroxy-5-（ 4-cyanophenyl）-benzaldehyde （CN-SA） , was prepared. Series of spectral tests show that, CN-SA not only shows the typical excited state intramolecular proton transfer （ESIPT） fluorescence characteristics, but also significantly increases the ketone distribution proportion in radiation transition process, so that the fluorescence intensity and color change visibly. CN-SA not only exhibites selective recogni- tion for the external solvent environment, but also has specific response and quantitative analysis ability for ag- gregation process （aggregation effect） and the hydrogen bond formation ability following environmental changes （pH effect and anions effect）. With little structure tuning, CN-SA could realize alcohol and ketone conforma- tion distribution changes and can be used as a simple multiple stimulation-responsive fluorescence probe.

关 键 词：激发态分子内质子转移 水杨醛 刺激-响应 荧光探针 醇酮转换 

分 类 号：O644[理学—物理化学]