Abstract Single crystals of hybrid materials based on 1D lead iodide perovskite networks with two pyridine (Py) derivatives, namely 4-ethyl (4Et)Py and 4-aminomethyl (4AM)Py, have been prepared. The compounds assembled into edge-shared lead iodide chains that formed needle-shaped crystals with lengths greater than 1 cm. The crystal containing (4Et)Py formed in the triclinic system with P1 symmetry. The molecules were stacked along with the novel triple chain of 1D perovskite-derived networks. The crystal containing 4AMPy formed in the monoclinic system with P21/a symmetry. The amino group formed hydrogen bonds to iodide anions. The optical band gaps for the 4EtPy-based and 4AMPy-based crystals were estimated to be 2.73 eV and 2.64 eV, respectively. The slight difference between the functional groups of the two molecules governed their crystal structures and hence optical properties.

中文翻译：

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吡啶衍生物共边八面体钙钛矿衍生一维单晶的制备

摘要 已经制备了基于具有两种吡啶 (Py) 衍生物，即 4-乙基 (4Et)Py 和 4-氨基甲基 (4AM)Py 的一维碘化铅钙钛矿网络的杂化材料单晶。这些化合物组装成边缘共享的碘化铅链，形成长度大于 1 厘米的针状晶体。在具有 P1 对称性的三斜晶系​​中形成含有 (4Et)Py 的晶体。这些分子与一维钙钛矿衍生网络的新型三链一起堆叠。含 4AMPy 的晶体在单斜晶系中形成，具有 P21/a 对称性。氨基与碘阴离子形成氢键。4EtPy 基和 4AMPy 基晶体的光学带隙估计分别为 2.73 eV 和 2.64 eV。