Effect of two sonochemical procedures on achieving to different morphologies of lead(II) coordination polymer nano-structures |
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| Authors: | Kamran Akhbari Ali Morsali Pascal Retailleau |
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| Institution: | 1. Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Islamic Republic of Iran;2. Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS-UPR2301, 1 Avenue de la Terrasse, Bât 27, 91198 Gif sur Yvette cedex, France |
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| Abstract: | Micro and nano-structures of a lead(II) coordination polymer, Pb2(2-Me-8-Hq)2(MeOH)2]n (1), 2-Me-8-HqH = 2-methyl-8-hydroxyquinoline], were synthesized by two sonochemical methods. These new micro and nano-structures were characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analyses. Compound 1 was structurally characterized by single-crystal X-ray diffraction and consists of primary dimeric unit of Pb2(2-Me-8-Hq)2(MeOH)2]. Self assembly between the dimmeric units of Pb2(2-Me-8-Hq)2(MeOH)2] from Pb-O bonds results in formation of a one-dimensional lead(II) coordination polymer. The PbII-ion in compound 1 has PbO6N1 coordination sphere with a stereo-chemically ‘active’ electron lone pair on the metals. By a reversible solid-state structural transformation, we successfully prepared Pb2(2-Me-8-Hq)2]n (2) by thermal desolvation of 1. Thermal stability of compound 1 was studied by thermo gravimetric and differential thermal analyses. In addition nano-structure of PbO was prepared from calcination process of compound 1 at 873 K. |
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| Keywords: | Nano-structure Coordination polymer Lead(II) Sonochemical Solid-state Structural transformation |
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