Solid state and sonochemical syntheses of nano lead(II) chloride and bromide coordination polymers from its nitrate analog via mechanochemical crystal to crystal transformations

• Published in: Ultrasonics sonochemistry Vol. 21; no. 4; pp. 1417 - 1423
• Main Authors: Hashemi, Lida, Morsali, Ali
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01-07-2014; Elsevier
• Subjects: Anion-replacement; Chemistry; Coordination polymer; Exact sciences and technology; General and physical chemistry; Nano-structure; Physical chemistry of induced reactions (with radiations, particles and ultrasonics); Sonochemical; Ultrasonic chemistry; Sonochemical; Coordination polymer; Anion-replacement; Nano-structure; Sonochemistry; Crystals; Polymer; Nitrates; Replacement; Solid state; Lead II; Synthesis; Structure; Ultrasound; Lead chloride
• ISSN: 1350-4177; 1873-2828
• DOI: 10.1016/j.ultsonch.2013.12.009

Reversible crystal-to-crystal transformations of 3D lead(II) coordination polymers with the ligand 2,5-bis(4-pyridyl)-3,4-diaza-2,4-hexadiene (4-bpdh), from nitrate analoge [Pb(4-bpdh)(NO3)2(H2O)]n (1) to [Pb(4-bpdh)(NO3)(Br)]n (2), [Pb(4-bpdh)(Br)2]n (3), [Pb(4-bpdh)(NO3)(Cl)]n (4) and [Pb(4-bpdh)(Cl)2]n (5) by solid state anion-replacement processes under mechanochemical reactions, have been studied. The reversible solid state structural transformations of compounds 1–5, by anion-replacement processes under mechanochemical reaction, have been verified by PXRD measurements. Nanoparticles of compounds were synthesized by sonochemical process and characterized by scanning electron microscopy (SEM), powder X-ray diffraction, IR spectroscopy and elemental analyses. The SEM images showed that morphology change occurs during solid state anion-replacements of nanocrystals.