Issue 16, 2012

Mechanochemical solid-state transformations from a 3D lead(ii) chloride triazole carboxylate coordination polymer to its bromide/thiocyanate analogs via anion-replacements: precursors for the preparation of lead(ii) chloride/bromide/sulfide nanoparticles

Abstract

Irreversible crystal-to-crystal transformations of 3D lead(II) coordination polymers with the ligand 1H-1,2,4-triazole-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. The thermal stabilities of compounds 13 were studied by thermogravimetric and differential thermal analyses. These irreversible solid-state 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. These nanoparticles were characterized by powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM).

Graphical abstract: Mechanochemical solid-state transformations from a 3D lead(ii) chloride triazole carboxylate coordination polymer to its bromide/thiocyanate analogs via anion-replacements: precursors for the preparation of lead(ii) chloride/bromide/sulfide nanoparticles

Supplementary files

Article information

Article type
Communication
Submitted
26 Feb 2012
Accepted
25 May 2012
First published
28 May 2012

CrystEngComm, 2012,14, 5130-5132

Mechanochemical solid-state transformations from a 3D lead(II) chloride triazole carboxylate coordination polymer to its bromide/thiocyanate analogs via anion-replacements: precursors for the preparation of lead(II) chloride/bromide/sulfide nanoparticles

V. Safarifard and A. Morsali, CrystEngComm, 2012, 14, 5130 DOI: 10.1039/C2CE25277E

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