Synthesis, characterization and phase transitions of the inorganic-organic layered perovskite-type hybrids [(CnH2n+1NH3)2PbI4] (n=12, 14, 16 and 18)
Synthesis, characterization and phase transitions of the inorganic-organic layered perovskite-type hybrids [(CnH2n+1NH3)2PbI4] (n=12, 14, 16 and 18)
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DOI：
10.1039/b805417g
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发表时间：
2008-01-01
影响因子：
3.3
通讯作者：
Lemmerer, Andreas
中科院分区：
文献类型：
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作者：
Billing, David G.;Lemmerer, Andreas
测定了通式[(CnH2n+ 1NH3)(2)PbI4] （n = 12、14、16和18）的无机-有机层状钙钛矿型杂化体的室温单晶结构。这四种化合物在室温以上均表现出两种可逆的相变，分别标记为III、II和i相。从相III到相II的相变是一级转变，对应于烷基铵链构象的变化和无机层相对于彼此的移动。所有化合物从III到II的相变都是热致变色的，从黄色变为橙色。
The room temperature single-crystal structures of the inorganic-organic layered perovskite-type hybrids of general formula [(CnH2n+ 1NH3)(2)PbI4] (n = 12, 14, 16 and 18) have been determined. The four compounds each display two reversible phase transitions above room temperature, with phases labelled III, II and I. The single-crystal structures of phase II have also been determined. The phase transition from phase III to phase II is a first-order transition and corresponds to a change in the conformation of the alkylammonium chains and a shift of the inorganic layers relative to each other. The phase change from III to II is thermochromic for all compounds, going from a yellow to an orange colour.