Preparation of perovskite-derived one dimensional single crystals based on edge-shared octahedrons with pyridine derivatives

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.