Self-powered stimuli responsive material for dual stimulation of heat and guest molecules  

作　　者：Jintao Men Ke Xu Taiting Sha Lei He Yan Xu Jie Mu Tijian Yin Qiong Ye 

机构地区：[1]Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics and School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China

出　　处：《Chinese Chemical Letters》2024年第2期590-593,共4页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.22275033).

摘　　要：Stimuli-responsive smart materials exhibit reverse chemical/physical changes in response to external stimuli and research on stimuli-responsive smart materials with self-powered properties is still uncultivated ground.Here,we report perovskite crystalline self-powered multiple stimuli-responsive materials triggered by chemical and thermal stimuli.[HMEP]PbI_(3)·(H_(2)O)(1;HMEP is a hydroxytris(1-methylethyl)phosphorus cation)crystallizes in a chiral space group P 21 at 293 K and has the piezoelectric reaction(d_(33)=10 pC/N and output voltage=1 V)of self-powered modes,this value is larger than the value of 3 pC/N for the classical piezoelectric material ZnO.Piezoelectric materials can generate energy due to mechanical deformation,and using thermal heating to lose water,[HMEP]PbI_(3)(2)can be obtained.2 crystallizes in the non-centrosymmetric space group,undergoes two reversible phase transitions at 243/255 K and 315/348 K,and shows second harmonic generation switching.Interestingly,2 can return to the hydrated form 1 after absorbing water.This work will lay the foundation for self-powered stimuli-responsive compounds and contribute to the construction of novel organic-inorganic hybrid materials with second harmonic generation switching.

关 键 词：SELF-POWERED Dual stimulation reactive Phase transition SHG switch Organic-inorganic hybrid perovskite 

分 类 号：TB381[一般工业技术—材料科学与工程]