Phase transition arising from order-disorder motion in stable layered two-dimensional perovskite  

作　　者：Zhuoer Cai Yinan Zhang Xiu-Ni Hua Baiwang Sun 

机构地区：[1]School of Chemistry and Chemical Engineering,Southeast University,Nanjing,211189,PR China [2]School of Environmental Science,Nanjing Xiaozhuang University,Nanjing,211171,PR China

出　　处：《Chinese Journal of Structural Chemistry》2024年第11期37-42,共6页结构化学(英文)

基　　金：supported by the National Natural Science Foundation of China(22201134);the Natural Science Foundation of Colleges and Universities in Jiangsu Province(22KJB150028).

摘　　要：In recent years,organic-inorganic hybrid materials are widely designed and synthesized as switching materials for temperature response.However,due to the change of molecular arrangement inside the crystal during solid-solid phase transition,the distortion of crystal lattice and the great change of lattice parameters are often caused,which result in a poor repeatability and short life.Thus,designing phase change materials with small lattice changes helps to improve product life.In this article,a novel organic-inorganic hybrid material 3HDMAPAPbBr_(4)(1,3HDMAPA is 3-(hydroxydimethylammonio)propan-1-aminium)was successfully synthesized and characterized.For 1,organic cations filled in the van der Waals gap are connected by hydrogen bonds with halogens in the two-dimensional inorganic layer,forming a stable sandwich structure.During the solid-solid phase transition driven by temperature,the changes of inorganic skeleton are relatively small,and the disorder movement of organic cations does not affect the existence of hydrogen bonds,maintaining a relatively stable crystal structure.In addition,electrical property,optical property and crystal structures are analyzed and discussed in detail.We believe that our work will contribute to the development and application of phase change materials in response materials.

关 键 词：Phase transition material Organic-inorganic hybrid material Responsive material 

分 类 号：TG1[金属学及工艺—金属学]