High Quality of a Perchlorate-Based Hybrid Perovskite-Type Cage-Like Single Crystal - Evidence of Temperature-Induced Distinct Dielectric Transition
High Quality of a Perchlorate-Based Hybrid Perovskite-Type Cage-Like Single Crystal - Evidence of Temperature-Induced Distinct Dielectric Transition
复制标题
高质量的高氯酸盐基杂化钙钛矿型笼状单晶——温度诱导的独特介电转变的证据
DOI：
10.1002/ejic.202100624
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发表时间：
2021
影响因子：
2.3
通讯作者：
Shi Chao
中科院分区：
文献类型：
--
作者：
Huang Yi-Fang;Xiang Lin;Feng Yan;An Zhen;Miao Le-Ping;Li Jian-Rong;Ye Heng-Yun;Shi Chao
（HTz）[Ba（ClO 4）3]（HTz=噻唑鎓阳离子，1），高氯酸盐基混合钙钛矿型单晶在143/154 K和210/218 K下经历连续结构相变。 钙钛矿型笼状结构由Ba 2+节点和ClO 4 −连接体组成，形成阴离子笼Ba 8（ClO 4）12，HTz位于其中。值得注意的是，结合HTz的阴离子骨架是具有（412 <$63）骨架的钙钛矿型结构。不同温度下的单晶结构分析揭示了HTz的阶跃变化动力学，阴离子笼Ba 8（ClO 4）12的畸变是相变的起源。我们倾向于将可切换的介电常数行为主要归因于HTz的有序-无序转变和Ba 8（ClO 4）12骨架的重排。此外，记录了介电开关。我们的研究结果可能会促进新的高氯酸盐基有机-无机杂化钙钛矿的研究。
(HTz)[Ba(ClO4)3] (HTz=thiazolium cation,1), a perchlorate‐based hybrid perovskite‐type single crystal undergoes sequential structural phase transitions at 143/154 K and 210/218 K. The perovskite‐type cage structure is composed of Ba2+nodes and ClO4−linkers to form anionic cage Ba8(ClO4)12in which the HTz resides. It is notable that the anionic framework incorporating HTz is a perovskite‐type structure with the (412⋅ 63) framework. Various‐temperature single‐crystal structure analyses reveal the stepwise changed dynamics of HTz, and the distortion of the anionic cage Ba8(ClO4)12are the origin of the phase transitions. We tend to attribute the switchable dielectric constant behavior mainly to order‐disorder transition of the HTzs and the rearrangement of the Ba8(ClO4)12framework. Furthermore, dielectric switching is recorded. Our findings may prompt investigations of new perchlorate‐based organic‐inorganic hybrid perovskites.