A copper-based coordination polymer formed through synergistic bridging of 1,2,4-triazole and acetate anions: synthesis,
- PDF / 1,529,594 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 87 Downloads / 200 Views
A copper‑based coordination polymer formed through synergistic bridging of 1,2,4‑triazole and acetate anions: synthesis, crystal structure and magnetic properties Lu Di1 · Hao Dong1 · Dan Ni Chen1 · Hai Ying Wang1 · Hui Yan Liu1 Received: 27 May 2020 / Accepted: 18 August 2020 © Springer Nature Switzerland AG 2020
Abstract A Cu(II) coordination polymer, [Cu2(pztrz)2(μ-CH3COO)(CH3COO)]·3H2O (1), derived from mono-substituted 1,2,4-triazole derivative 3-(pyrazinyl)-1,2,4-triazole (Hpztrz) is isolated and structurally characterized. X-ray structural analysis shows that Hpztrz ligands and acetate anions demonstrate different coordination modes in complex 1. The two Cu(II) ions are bridged by the 1,2,4-triazole ring of Hpztrz to form a dinuclear unit, which is further linked by two bridging acetate anions to form u4 unit is connected to another four C u4 units through the outer pyrazinyl of a tetranuclear C u4 unit. Interestingly, each C Hpztrz, resulting in a two-dimensional (2D) layer structure. Consecutive layers are further packed into three-dimensional (3D) structures through interlayer hydrogen-bonding interactions. Furthermore, variable-temperature magnetic susceptibility studies reveal that the antiferromagnetic interactions are mediated through 1,2,4-triazole-N1,N2 bridges and acetate bridges with coupling constants of J1 = − 69.98 cm−1 and J2 = − 2.15 cm−1.
Introduction Coordination polymers (CPs) assembled from inorganic metal ions/clusters and organic ligands have emerged as a well-developed class of crystalline materials [1]. In particular, CPs have demonstrated potential applications as functional materials in catalysis, ion exchange, gas adsorption/ separation, chemical sensors and magnetic devices [2–6]. Driven by the rational modification of the structure of CPs, a large number of CPs have been reported, particularly through ligand design, to achieve a regulation of their topology and functions [1]. In this context, metal complexes with 1,2,4-triazole (Htz) (Scheme 1) or its derivative ligands Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11243-020-00421-9) contains supplementary material, which is available to authorized users. * Hai Ying Wang [email protected] * Hui Yan Liu [email protected] 1
School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, People’s Republic of China
have recently attracted considerable attention, which may be related to the fact that the Htz ligand has strong binding ability with various metal ions and facile modifiability. In particular, the ability to modify the Htz ligand allows for the introduction of various substituents. Consequently, many articles have been reported on the coordination modes and properties of Htz derivatives [7–10]. Recently, Wang and coworkers reported a series of CPs constructed with pyrazinyl-substituted bi-1,2,4-triazole ligand, 5′-(pyrazin2-yl)-2H,4′H-3,3′-bi(1,2,4-triazole
Data Loading...
