Photoactivated organic phosphorescence by stereo-hindrance engineering for mimicking synaptic plasticity  

作　　者：He Wang Yuan Zhang Chifeng Zhou Xiao Wang Huili Ma Jun Yin Huifang Shi Zhongfu An Wei Huang 

机构地区：[1]Key Laboratory of Flexible Electronics(KLoFE)&Institute of Advanced Materials(IAM),Nanjing Tech University,Nanjing 211800,China [2]The Institute of Flexible Electronics(IFE,Future Technologies),Xiamen University,Xiamen 361005,China [3]Department of Applied Physics,The Hong Kong Polytechnic University,Kowloon 999077 Hong Kong,China [4]State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM),Nanjing University of Posts&Telecommunications,9 Wenyuan Road,Nanjing 210023,China [5]Frontiers Science Center for Flexible Electronics(FSCFE),MIIT Key Laboratory of Flexible Electronics(KLoFE),Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Light(Science & Applications)》2023年第6期972-981,共10页光（科学与应用)（英文版）

基　　金：The authors acknowledge the support from the National Basic Science Center of Flexible Electronics(62288102);the National Key R&D Program of China(grant no.2020YFA0709900);the National Natural Science Foundation of China(21975120,62134007,and 21973043);Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX21_1096).Cultivation Program for The Excellent Doctoral Dissertation of Nanjing Tech University.

摘　　要：Purely organic phosphorescent materials with dynamically tunable optical properties and persistent luminescent characteristics enable more novel applications in intelligent optoelectronics.Herein,we reported a concise and universal strategy to achieve photoactivated ultralong phosphorescence at room temperature through stereo-hindrance engineering.Such dynamically photoactivated phosphorescence behavior was ascribed to the suppression of non-radiative transitions and improvement of spin-orbit coupling(SOC)as the variation of the distorted molecular conformation by the synergistic effect of electrostatic repulsion and steric hindrance.This“trainable”phosphorescent behavior was first proposed to mimic biological synaptic plasticity,especially for unique experience-dependent plasticity,by the manipulation of pulse intensity and numbers.This study not only outlines a principle to design newly dynamic phosphorescent materials,but also broadens their utility in intelligent sensors and robotics.

关 键 词：PLASTICITY STEREO electrostatic 

分 类 号：O62[理学—有机化学]