Reversible solid–gas and solid–solid transformation of lead(II)–phenylalanine coordination polymers
作者:Azar Hakimifar、Ali Morsali
DOI:10.1016/j.ica.2015.06.004
日期:2015.8
A reversible crystal to crystal structural transformation of lead(II) complex; [Pb(OH2)(2)(Phe)(2)(NO3)](n)[NO3] (1), (Phe: L-phenylalanine), to coordination polymer 2D [Pb(phe)(2)](n) (2); has been observed upon solid-gas and solid-solid reactions of compound 1 to compound 2 and then 2 to 1. A lead(II) supramolecular (1), polymerizes on grinding the solid with 1 mmol NaOH and also with NH3 vapors to form the 2D coordination polymer (2). Solid-gas reaction has been verified by PXRD and IR spectroscopy. Pb3O4 and mixture phase of PbO nanoparticles were obtained by thermal decomposition of compounds 1 and 2 by direct calcinations at 400 degrees C for 4 h. These nanoparticles were characterized by powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM). (C) 2015 Elsevier B.V. All rights reserved.