ABX3-Type Organic鈥揑norganic Hybrid Phase Transition Material: 1-Pentyl-3-methylimidazolium Tribromoplumbate

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• 作者：Tianliang Chen ; Yuelan Zhou ; Zhihua Sun ; Shuquan Zhang ; Sangen Zhao ; Yuanyuan Tang ; Chengmin Ji ; Junhua Luo
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：August 3, 2015
• 年：2015
• 卷：54
• 期：15
• 页码：7136-7138
• 全文大小：252K
• ISSN：1520-510X

文摘

A new one-dimensional ABX₃-type organic鈥搃norganic hybrid phase transition compound, 1-pentyl-3-methylimidazolium tribromoplumbate (1), where the Pb^II ion exhibits hemicoordination geometry, resulting in anionic (PbBr₃)_n chains of an edge-shared PbBr₅ polyhedron, has been successfully synthesized. 1 undergoes a reversible second-order phase transition at about 136 K. The dielectric constants of 1 exhibit an obvious steplike anomaly tuned between a high dielectric state in the high-temperature phase and a low state in the low-temperature phase. The origin of its phase transition is ascribed to the order鈥揹isorder transformation of the cation coupled with the relative displacement of the Br atoms. These findings provide a new approach to exploring a novel ABX₃-type compound with functional phase transition properties.