Irreversible transformations of 3d lead(ii)
Coordination polymers via mechanochemistry;
Precursors for the preparation of lead(ii) chloride/bromide/sulfide nanoparticles
ALI MORSALI, VAHID SAFARIFARD
1,2
TarbiatModares University, Tehran, Iran
E-mail: 1morsali_a@modares.ac.ir, 2v.safarifard@modares.ac.ir
Abstract- Irreversible crystal-to-crystal transformations of 3D lead(II) coordination polymers with the ligand 1H-1,2,4triazole-3-carboxylic acid (HL), from [Pb(L)(µ2-Cl)(H2O)]n (1) to [Pb(L)(µ2-Br)(H2O)]n (2) and [Pb(L)(µ1,1-NCS)(H2O)]n (3) by solid-state anion-replacement processes under mechanochemical reactions, have been studied. These irreversible solidstate structural transformations of compound 1 to compounds 2 and 3, have been verified by PXRD measurements. PbCl2, PbBr2 and PbS nanoparticles were obtained by thermal decomposition of compounds 1, 2 and 3 in oleic acid as surfactant at 200 °C under air atmosphere, respectively.