层状有机-无机杂化钙钛矿(C7H12N2)PbBr4的合成、结构及发光性质

通过向杂化体系中引入特殊的有机配体2-（2-氨基乙基）吡啶，利用溶液冷却技术，合成了一种二维层状有机-无机杂化钙钛矿结构材料的化合物(C7H12N2)PbBr4的晶体。 X射线单晶衍射结果表明，化合物(C7H12N2)PbBr4的单晶结构属于正交晶系，Pbca空间群，a=1.702 3 nm，b=0.828 9 nm，c=2.022 4 nm，Z=8。 无机部分是由共顶点的PbBr6金属卤化物八面体组成的二维平面片层。 采用了相对扭曲构型的有机胺阳离子与二维无机片层通过氢键作用组成了杂化钙钛矿结构。 对其光学性质进行了测试。荧光光谱的特征发射峰出现在422 nm处。

Synthesis, Crystal Structure and Optical Properties of a Two-Dimensional Organic-inorganic Hybrid Perovskite (C7H12N2)PbBr4

A two-dimensional organic-inorganic hybrid perovskite C7H12N2PbBr4 has been grown via a solution-cooling process by employing the organic cation-2-(2-aminomethyl) pyridinium to control the hybrid compound. The structure of C7H12N2PbBr4 was determined by single-crystal X-ray diffractions to be orthorhombic(Pbca, No.61), with the primitive unit cell of dimensions:a=1.7023 nm, b=0.8289 nm, c=2.0224 nm, and Z=8. The inorganic sublattice is built up from corner-sharing PbBr6 octahedra forming infinite two-dimensional layered sheets. The organic cations (2-(2-aminomethyl) pyridinium) adopt obviously distorted configuration to connect the inorganic sheets by special hydrogen bonding. Moreover, optical absorption is used to gain more information of the title compound. The characteristic photoluminescence emission peak is located at 422 nm.