Structural diversity of lead halide chain compounds, APbX3, templated by isomeric molecular cations.,Dalton Transactions

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Structural diversity of lead halide chain compounds, APbX3, templated by isomeric molecular cations.
Dalton Transactions ( IF 3.5 ) Pub Date : 2020-08-27 , DOI: 10.1039/d0dt02782k
Yuan-Yuan Guo ₁ , Philip Lightfoot ₁

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Three new 1D chain structure type hybrid organic–inorganic lead(II) halides are presented: IQPbBr₃, QPbBr₃ and QPbI₃, templated by large organic cations, isoquinolinium ([IQ⁺] = protonated isoquinoline) and its isomer quinolonium ([Q⁺] = protonated quinoline). All three compounds possess the same generic formula as cubic perovskite, ABX₃, but adopt different structures. IQPbBr₃ adopts a 1D face-sharing single chain hexagonal perovskite structure type, and the other two, QPbBr₃ and QPbI₃, adopt a non-perovskite structure which is built from 1D edge-sharing octahedral double chains. Crystal structures and preliminary photophysical properties are discussed. Two of them have lower bandgaps than the other reported materials with the same structure type, indicating the value of further exploratory studies for these types of materials.

中文翻译：

卤化铅链化合物APbX3的结构多样性由异构分子阳离子作为模板。

提出了三种新的一维链结构类型的有机-无机杂化铅（II）卤化物：IQPbBr ₃，QPbBr ₃和QPbI ₃，以大型有机阳离子为模板，异喹啉鎓（[IQ ⁺ ] =质子化的异喹啉）及其异构体喹啉鎓（[Q ⁺ ] =质子化喹啉）。这三种化合物都具有与立方钙钛矿ABX ₃相同的通式，但采用不同的结构。IQPbBr ₃采用一维面共享单链六方钙钛矿结构类型，其他两种分别为QPbBr ₃和QPbI ₃，采用非钙钛矿结构，该结构由一维边共享八面体双链构建。讨论了晶体结构和初步的光物理性质。其中两个具有比其他报道的具有相同结构类型的材料更低的带隙，表明对这些类型的材料进行进一步探索性研究的价值。

更新日期：2020-09-22

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