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Phosphonium-Based One-Dimensional Perovskite with Switchable Dielectric Behaviors and Phase Transitions
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-12-03 , DOI: 10.1021/acs.inorgchem.0c03008 Si-Min Liu 1 , Ying-Jie Cao 1 , Lei He 1 , Ping-Ping Shi 1 , Qiong Ye 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-12-03 , DOI: 10.1021/acs.inorgchem.0c03008 Si-Min Liu 1 , Ying-Jie Cao 1 , Lei He 1 , Ping-Ping Shi 1 , Qiong Ye 1
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The one-dimensional (1D) ABX3-type perovskite [(CH3)3PCH2F]CdCl2Br (1) has been obtained on the basis of the design of an organic–inorganic hybrid. Strikingly, it experiences sequential phase transitions at around 295 and 336 K, respectively. Given the noticeable steplike dielectric anomalies in the vicinity of 295 K, 1 is identified as a promising dielectric-switchable material. According to the single-crystal structure analysis, the order-to-disorder transformation of the [(CH3)3PCH2F]+ cation is the main reason for the phase transitions and the change of space group from the orthorhombic Pnma (No. 62) to the hexagonal P63/m (No. 176). This design of a perovskite structure will inspire more advances in the ever-growing field of switchable functional materials.
中文翻译：
具有可切换介电行为和相变的基一维钙钛矿
一维（1D）ABX 3型钙钛矿[（CH 3）3 PCH 2 F] CdCl 2 Br（1）是在有机-无机杂化体的设计基础上获得的。令人惊讶的是，它分别在大约295 K和336 K处经历了连续的相变。考虑到在295 K附近出现明显的阶梯状介电异常，将1确定为一种有前途的介电可切换材料。根据单晶结构分析，[（CH 3）3 PCH 2 F] +的有序转变阳离子是相变和空间群从正交Pnma（编号62）到六角形P 6 3 / m（编号176）变化的主要原因。钙钛矿结构的这种设计将在可转换功能材料不断发展的领域中激发更多的进步。
更新日期：2020-12-21
中文翻译：
具有可切换介电行为和相变的基一维钙钛矿
一维（1D）ABX 3型钙钛矿[（CH 3）3 PCH 2 F] CdCl 2 Br（1）是在有机-无机杂化体的设计基础上获得的。令人惊讶的是，它分别在大约295 K和336 K处经历了连续的相变。考虑到在295 K附近出现明显的阶梯状介电异常，将1确定为一种有前途的介电可切换材料。根据单晶结构分析，[（CH 3）3 PCH 2 F] +的有序转变阳离子是相变和空间群从正交Pnma（编号62）到六角形P 6 3 / m（编号176）变化的主要原因。钙钛矿结构的这种设计将在可转换功能材料不断发展的领域中激发更多的进步。
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