C─H···πinteraction induced H-aggregates for wide range water content detection in organic solvents  

作　　者：Jiajun Xu Meifen Huang Haijun Pang Zhehui Weng Guangzhi Hu Siman Zhang Qiuling Yang Qiong Wu 

机构地区：[1]Department of Chemical Science and Technology,Kunming University,Kunming,China [2]College of Physics Science and Technology,Kunming University,Kunming,China [3]The School of Material Science and Chemical Engineering,Harbin University of Science and Technology,Harbin,China [4]Institute for Ecological Research and Pollution Control of Plateau Lakes,Yunnan University,Kunming,China

出　　处：《Aggregate》2024年第4期269-278,共10页聚集体（英文）

基　　金：the Program for Innovative Research Team(in Science and Technology)in Universities of Yunnan Province(IRTSTYN),the Recruitment Program of Yunnan Province Experts Provincial Young Talents(2019HB098);the Ten-Thousand Talents Program of Yunnan Province(YNWR-QNBJ-2018-273).

摘　　要：J-aggregation and H-aggregation are identified as two classical models of function-ally oriented non-covalent interactions,and significant attention has been drawn by researchers.However,due to the scarcity of single-crystal examples of H-aggregation,a comprehensive understanding of the relationship between its stacking mode and optical behaviour has been hindered.In recent studies,two polyaromatic Schiff base compounds,Cl-Salmphen and H-Salmphen,were successfully synthe-sized,and both were found to exhibit H-aggregation.In thefindings,H-Salmphen was shown to display typical C─H···πinteractions,characteristic of Aggregation-Induced Emission(AIE)active molecules,whereas its halogenated counterpart was identified as behaving similar to Aggregation-Caused Quenching(ACQ)active molecules.These types of results suggest that identical intermolecular interactions can produce differing optical behaviours.Light was shed,at least in part,on the for-mation mechanisms of H-type aggregates and their luminescence properties from these observations.Additionally,the high optical signal-to-noise ratio inherent to H-aggregates was utilized for the exploration of water content detection.As an outcome,a high-performancefluorescentfilter paper was developed,enabling easy real-time detection using a smartphone.

关 键 词：aggregation-caused quenching aggregation-induced emission enhanced C─H···πinteractions fluores-cence sensor H-AGGREGATION 

分 类 号：O62[理学—有机化学]