文献类型：期刊文献

英文题名：Dual responsive behaviors in fluorescence of molecular crystals based on naphthalene pyridyl derivatives

作者：Zhang, Tian -Le[1];Fan, Zhi-Bo[1];Zhang, Chen-Chen[1];Lin, Hui-Yao[1];Qu, Da-Hui[1];Tong, Fei[1]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat,Inst Fine Chem, Sch Chem & Mol Engn,Frontiers Sci Ctr Materiobil &, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobil & Dynam Chem, Inst Fine Chem,Sch Chem & Mol Engn,Joint Int Res L, Shanghai 200237, Peoples R China

年份：2024

卷号：229

外文期刊名：DYES AND PIGMENTS

收录：;EI(收录号：20242716615941);WOS:【SCI-EXPANDED(收录号:WOS:001266237600001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (NSFC) (Grant No. 22105071 and 22375063) , the Science and Technology Commission of Shanghai Municipality (Grant No. 22ZR1417100 and 23JC1401700) , and the Fundamental Research Funds for the Central Universities. The authors also thank the Research Center of Analysis and Test of East China University of Science and Technology for help on the material measurements and characterization.

语种：英文

外文关键词：Cryptography - Fluorescence - Molecular crystals - Nitrogen - Pyridine - Synthesis (chemical)

摘要：Three compounds based on naphthalene and pyridine structures with different nitrogen positions ( NP-2 , NP-3 , and NP-4 ) were synthesized. Except for displaying aggregation-induced emission ( AIE ) properties, the solution and crystals of these compounds show reversible fluorescence changes under alternative acid and base treatments. Experimental results, including X-ray diffraction, optical spectroscopy measurements, and cross-polarized microscope characterization, suggested that compounds might undergo reversible crystal-to-crystal transition upon external acid and base stimuli. It also revealed that the position of the heteroatom nitrogen in the pyridine unit significantly affected the intra- and intermolecular interactions, leading to restricted-intermolecular motions (RIMs) that caused the AIE effect. Besides, computational calculations indicated significant changes in molecular geometries and electronic interactions between the initial states and the protonated states. An information encryption system involving activation and operation codes was established based on the multiple stimuli-responsive properties. Our work not only presents a facile way to develop multiple responsive properties in molecular crystal systems but also explores their potential as highly emissive functional dyes for future applications.