Achieving tunable long persistent luminescence in metal organic halides based on pyridine solvent  

作　　者：Jun-Ting Mo Zheng Wang 

机构地区：[1]College of Chemistry and Chemical Engineering,Key Laboratory of Chemical Additives for China National Light Industry,Shaanxi University of Science and Technology,Xi’an 710021,China [2]MOE Laboratory of Bioinorganic and Synthetic Chemistry,Lehn Institute of Functional Materials,School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China

出　　处：《Chinese Chemical Letters》2024年第9期227-231,共5页中国化学快报（英文版）

基　　金：financially supported by National Natural Science Foundation of China(No.22101162);Start-up Foundation of Shaanxi University of Science&Technology(No.126022036)。

摘　　要：The research of long persistent luminescence(LPL)materials has yield brilliant results in many fields.However,the efforts are still needed for the regulation of the LPL performance.In this work,a series of LPL metal organic halides with rich halogen-bond interactions,Py-CdX_(2)(X=Cl,Br,I)were synthesized through self-assembly by Cd X_(2)and pyridine solvent.The steady-state emission redshifted and phosphorescence lifetime declined as the halogen atoms are aggravated.Three halides exhibit adjustable emission from blue to green and multiple phosphorescence from green to yellow at room temperature by changing the excitation wavelengths.Surprisingly,Py-CdX_(2)can emit the visible color-tunable LPL from green to yellow after removing different excitation sources at ambient conditions.Combing the results of theoretical calculation and experimental analysis,it is found that heavy atom effect and the rich intermolecular halogen bond help realize LPL and multiple triplet states originated from the pyridine ring and the halogens.

关 键 词：Metal organic halide Heavy atom effect Halogen bond Tunable long persistent luminescence ANTI-COUNTERFEITING 

分 类 号：TQ422[化学工程]