The effects of altering reaction conditions in synthesis of a novel lead(II) 2D coordination polymer as well as in achieving the same morphologies of lead(II)oxide micro-nano structures via solid-state process

摘要

One lead(II) coordination polymer compound (CPC) [Pb(L)(NCS)](n) (1) (2D layer), in which L stands for C5H4NCOO {pyridine-3-carboxylate(-) anion), has been synthesized following two different experimental approaches; branched tube and sonochemical irradiation methods. Independently of the methodology used, the same crystalline phase is obtained for complex. Single crystal X-ray analyses of compound 1 showed that Pb2+ ions are 5-coordinated, and Hirschfeld surface analyses were studied for 1, showing the role of sonochemistry to modulate both morphology and dimensions of the resulting crystalline material. In order to study the effects of the solvent and time of reaction on the formation of [Pb(L)(NCS)](n) (1) CPC, some experiments were designed, and four samples of 1 were synthesized by sonochemical process. Less time of reaction resulted in the formation of compound 1 mainly like micro-nano rods. With more time of reaction, various morphologies, mainly microhexagonal of 1, were obtained. These four samples have been used as new precursors for the preparation of lead(II)oxide micro-nano structures via solid-state thermal decomposition process. Mix morphology, mainly like sphere micro-nano structures of lead(II)oxide could be prepared from 1. These micro-nano structures were characterized by IR spectroscopy, X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). (C) 2018 Published by Elsevier Ltd.