Photoluminescent lead(II) coordination polymers stabilised by bifunctional organoarsonate ligands. Issue 2 (17th March 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)
• Publication Date: 2015-03-17
• Subjects: coordination polymers -- metal-organic frameworks -- lead -- phtoluminesence -- x-ray crystallography; Materials -- Technological innovations -- Periodicals; 620.112
• DOI: 10.1088/1468-6996/16/2/024803
• Languages: English
• ISSNs: 1468-6996

Abstract

Abstract: 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 (H2 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 [Pb2 (TPAA)(HTPAA)(NO3 )]·6H2 O (1 ), [Pb2 (TPAA)(HTPAA)2 ]·DMF·0.5H2 O (DMF = N, N-Dimethylformamide) (2 ), [Pb2 Cl2 (TPAA)H2 O] (3 ), and [Pb3 Cl(TPAA)(HTPAA)2 H2 O]Cl (4 ). 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 1 and 2 represent two-dimensional (2D) layered structures whilst 3 and 4 form three-dimensional (3D) frameworks. The structures of 1, 2, and 4 contain one-dimensional (1D) {Pb II /AsO3 } substructures, while 3 is composed of 2D {Pb II /AsO3 } arrays. Besides their interesting topologies, 1 –4 all exhibit photoluminescence properties in the solid state at room temperature.