Photoluminescent lead(II) coordination polymers stabilised by bifunctional organoarsonate ligands. Issue 2 (April 2015)

• Record Type: Journal Article
• Authors: Lin, Jian-Di; Onet, Camelia I; Schmitt, Wolfgang
• Is Part Of: Science and technology of advanced materials. Volume 16:Issue 2(2015)
• Page Start: 303
• Page End: 313
• Publication Date: 2015-04
• Subjects: Materials -- Technological innovations -- Periodicals; 620.112
• DOI: 10.1088/1468-6996/16/2/024803
• Languages: English
• ISSNs: 1468-6996

Abstract

<abstract> <title>Abstract</title> <p>Four lead(II) coordination polymers were isolated under hydro(solvo)thermal conditions. The applied synthetic methodology takes advantage of the coordination behaviour of a new bifunctional organoarsonate ligand, 4-(1, 2, 4-triazol-4-yl)phenylarsonic acid (H<sub>2</sub>TPAA) and involves the variation of lead(II) reactants, metal/ligand mole ratios, and solvents. The constitutional composition of the four lead(II) coordination polymers can be formulated as [Pb<sub>2</sub>(TPAA)(HTPAA)(NO<sub>3</sub>)]·6H<sub>2</sub>O (<bold>1</bold>), [Pb<sub>2</sub>(TPAA)(HTPAA)<sub>2</sub>]·DMF·0.5H<sub>2</sub>O (DMF = N, N-Dimethylformamide) (<bold>2</bold>), [Pb<sub>2</sub>Cl<sub>2</sub>(TPAA)H<sub>2</sub>O] (<bold>3</bold>), and [Pb<sub>3</sub>Cl(TPAA)(HTPAA)<sub>2</sub>H<sub>2</sub>O]Cl (<bold>4</bold>). The compounds were characterized by single-crystal and powder x-ray diffraction techniques, thermogravimetric analyses, infra-red spectroscopy, and elemental analyses. Single-crystal x-ray diffraction reveals that <bold>1</bold> and <bold>2</bold> represent two-dimensional (2D) layered structures whilst <bold>3</bold> and <bold>4</bold> form three-dimensional (3D) frameworks. The structures of <bold>1</bold>, <bold>2, </bold> and <bold>4</bold> contain one-dimensional (1D) {Pb<sup>II</sup>/AsO<sub>3</sub>} substructures, while <bold>3</bold> is composed of 2D {Pb<sup>II</sup>/AsO<sub>3</sub>} arrays. Besides their interesting topologies, <bold>1</bold>–<bold>4</bold> all exhibit photoluminescence properties in the solid state at room temperature.</p> </abstract>