Synthesis, Structures, and Properties of Ni^II, Co^II, Cu^II, Mn^II, and Zn^II Coordination Polymers Based on 5-Aminoisophthalate and 4-Amino-3,5-bis(3-pyridyl)-1,2,4-triazole

Abstract

Self-assembly of 5-amino-isophthalic acid (H₂aip) and 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole (3-bpt) with Ni(NO₃)₂, Co(ClO₄)₂, Cu(NO₃)₂, Mn(OAc)₂, and Zn(NO₃)₂, respectively, under similar reaction condition affords five new coordination polymers {[M(3-bpt)(aip)(H₂O)₂]·(H₂O)₂}_n (M = Ni for 1, Co for 2, Cu for 3, Mn for 4, and Zn for 5). Single-crystal X-ray diffraction indicates that coordination polymers 1–5 show isostructural 1D double-chain structures, and the metal centers exhibit the same octahedral coordination environment. The carboxyl groups of ligand aip²⁻ adopt the same bis-monodentate bridging mode in all structures. These low-dimensional coordination motifs in 1–5 are further extended to the resultant three-dimensional (3D) supramolecular networks via H-bonding interactions. Furthermore, FT-IR spectroscopy, elemental analyses and thermogravimetric analysis (TGA) for 1–5 have also been studied in this article.

Keywords:

• coordination polymer
• 5-amino-isophthalic acid
• 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole
• H-bonding interaction

Supplementary Material

Supplemental data for this article can be accessed at the publisher's website. Crystallographic data for the structural analyses have been deposited to the Cambridge Crystallographic Data Center, CCDC Nos. 988369–988373. Copies of this information may be obtained free of charge from The Director, CCDC, 12 Union Road, Cambridge, CB2 1EZ, UK (Fax: [phone]; E-mail: [email protected], or http://www.ccdc.cam.ac.uk).

Funding

This work was financially supported by the National Natural Science Foundation of China (No. 21101112) and Seed Foundation of Tianjin University (No. 2010XJ-0210).