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Synthesis, structure and thermal study of a new 3-aminopyrazine-2-carboxylate based zinc(II) coordination polymer

  • Anirban Karmakar EMAIL logo and Susanta Hazra


A two-dimensional coordination polymer [Zn(L)2]n (1) (L = 3-aminopyrazine-2-carboxylate) synthesized from the solvothermal reaction of zinc(II) salt with 3-aminopyrazine-2-carboxylic acid (HL) is described. Compound 1 has been characterized by single X-ray diffraction, IR spectra and thermogravimetric analyses. Crystal structure analysis reveals that each hexacoordinated zinc(II) center adopts a distorted octahedral geometry occupied by three Ocarboxylate and three Npyrazine atoms. The L ligand binds the metal cation by means of a pyrazine N-atom and one, or both, carboxylate O-atoms. A three-dimensional supramolecular associate in the crystal lattice of 1 has been stabilized by a number of non-covalent interactions. The IR spectroscopic and TGA properties are investigated in this work. Topological analysis of the two-dimensional network has been also discussed.

Corresponding author: Anirban Karmakar, Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049–001, Lisbon, Portugal, E-mail: ; and Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, Gothenburg, Sweden


Financial supports from the Fundação para a Ciência e a Tecnologia (FCT), Portugal for fellowship grants (Ref. Nos. SFRH/BPD/76192/2011 and SFRH/BPD/78264/2011) to A. Karmakar and S. Hazra are gratefully acknowledged.


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Supplemental Material

The online version of this article (DOI: 10.1515/zkri-2014-1828) offers supplementary material, available to authorized users.

Received: 2014-12-21
Accepted: 2015-2-11
Published Online: 2015-3-11
Published in Print: 2015-6-1

©2015 by De Gruyter

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