期刊
INORGANIC CHEMISTRY
卷 54, 期 15, 页码 7136-7138出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.5b00891
关键词
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资金
- NSFC [21222102, 21373220, 51402296, 21171166, 21301172]
- 973 Key Program of MOST [2011CB935904]
- NSF for Distinguished Young Scholars of Fujian Province [2014J06015]
A new. one-dimensional ABX(3)-type organic-inorganic 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 under-goes 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-disorder transformation of the cation coupled with the relative displacement of the Br atoms. These findings provide a new approach to exploring a novel ABX(3)-type compound. with functional phase transition properties.
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