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Title: Two lead(II) 2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate complexes exhibiting different topologies and fluorescent properties

The reactions of PbCl{sub 2} with 2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylic acid (H{sub 3}iso) gave two complexes [Pb(H{sub 2}iso){sub 2}(H{sub 2}O)]{sub n} (1) and [Pb(Hiso)(H{sub 2}O)]{sub n} (2), which were characterized by IR spectroscopy, elemental analysis, thermogravimetric analysis, powder X-ray diffraction and single crystal X-ray diffraction analysis. The two complexes display different topologies. 1 shows a three-dimensional framework with the Schlaefli symbol (4.8{sup 5})(4.8{sup 2}) no matter if the weak Pb-O bonds are included or not. However, 2 presents a 3,3-connected two-dimensional sheet with the Schlaefli symbol (4.8{sup 2})(4.8{sup 2}) based on the calculation of only the normal Pb-O bonds and a 5,5-connected 3D network with the Schlaefli symbol (4{sup 15}.6{sup 4})(4{sup 4}.6{sup 8}.8{sup 2}) when the weak Pb-O bonds are also included. The fluorescent studies reveal an emission attributed to intraligand emission for 1 and an emission assigned to LMCT for 2. -- Graphical abstract: The reactions of PbCl{sub 2} with 2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylic acid (H{sub 3}iso) gave two complexes [Pb(H{sub 2}iso){sub 2}(H{sub 2}O)]{sub n} (1) and [Pb(Hiso)(H{sub 2}O)]{sub n} (2), which display different topologies and fluorescent properties. Display Omitted Highlights: {yields} Two Pb(II) complexes were prepared from the reactions of PbCl{sub 2} with the same ligand. {yields} The two title complexes display different topologies.more » {yields} Both normal and weak Pb-O bonds are discussed in the manuscript.{yields} The title two complexes show different fluorescent properties.« less
Authors:
 [1] ; ; ; ;  [1]
  1. Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Chemical Engineering of Guangxi Normal University, Yucai Road 15, Guilin 541004 (China)
Publication Date:
OSTI Identifier:
21494277
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 184; Journal Issue: 5; Other Information: DOI: 10.1016/j.jssc.2011.03.031; PII: S0022-4596(11)00128-9; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CARBOXYLIC ACIDS; CRYSTAL STRUCTURE; FLUORESCENCE; INFRARED SPECTRA; LEAD CHLORIDES; LEAD COMPLEXES; LIGANDS; MONOCRYSTALS; POWDERS; SHEETS; THERMAL GRAVIMETRIC ANALYSIS; TOPOLOGY; WATER; X-RAY DIFFRACTION CHEMICAL ANALYSIS; CHLORIDES; CHLORINE COMPOUNDS; COHERENT SCATTERING; COMPLEXES; CRYSTALS; DIFFRACTION; EMISSION; GRAVIMETRIC ANALYSIS; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; LEAD COMPOUNDS; LEAD HALIDES; LUMINESCENCE; MATHEMATICS; ORGANIC ACIDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHOTON EMISSION; QUANTITATIVE CHEMICAL ANALYSIS; SCATTERING; SPECTRA; THERMAL ANALYSIS