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Influence of Pyrazine/Piperazine Based Guest Molecules in the Crystal Structures of Uranyl Thiophene Dicarboxylate Coordination Polymers: Structural Diversities and Photocatalytic Activities for the Degradation of Organic Dye

Jennifer, Samson Jegan and Jana, Ajay Kumar (2017) Influence of Pyrazine/Piperazine Based Guest Molecules in the Crystal Structures of Uranyl Thiophene Dicarboxylate Coordination Polymers: Structural Diversities and Photocatalytic Activities for the Degradation of Organic Dye. In: CRYSTAL GROWTH & DESIGN, 17 (10). pp. 5318-5329.

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Official URL: http://doi.org/10.1021/acs.cgd.7h00826

Abstract

The reaction of uranyl acetate dihydrate with 2,5-thiophenedicarboxylic acid (H2TDC) as the main ligand and pyrazine (PYZ); piperazine (PZ); 1,4 pyridyl piperazine (PYPZ); 1,4-di(pyridin-4-yl) piperazine (DPYZ); 1,2 pyrimidyl piperazine (PMPZ) as auxiliary ligand leads to the formation of five new compounds UO2(TDC)(H2O)]center dot(PYZ)(0.5)center dot H2O, (I); (UO2)(2)(TDC)(3)center dot(HPZ)center dot 4(H2O), (II); UO2(TDC)(2)(H2O)]center dot(H(2)DPYZ)center dot H2O, (III); UO2(TDC)(3)]center dot(H(2)DPYZ), (IV); (UO2)(2)(TDC)(3)(H2O)]center dot(H(2)PMPZ)center dot H2O, (V). They were analyzed by IR, UV vis, thermogravimetric analysis, X-ray diffraction analysis, powder X-ray diffraction, and fluorescence spectroscopy. Depending on the countercation, uranyl thiophene dicarboxylate is shown to crystallize as 2D layer in (I, IV), 2D layer with twofold interpenetrated (6,3) nets in (II), 1D chains in (III), and 2D layer without 2-fold interpenetrated (6,3) nets in (V). The coligand DPYZ in structures of (III and IV) had not been added to the reaction but has been formed by the N-arylation of the PYPZ ligand. Compound (IV) was obtained serendipitously while trying some mixed metal compound. Furthermore, their functional properties, photoluminescence, and photocatalytical activity for oxidation of organic dyes have also been studied. Interestingly, compounds (II and V) with uranyl organic frameworks (UOF's) and honeycomb (6,3) nets possess highest efficiency in degradation of dyes.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Id for Latest eprints
Date Deposited: 03 Nov 2017 10:45
Last Modified: 03 Oct 2018 14:44
URI: http://eprints.iisc.ac.in/id/eprint/58166

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