Issue 18, 2011
From the journal:

Dalton Transactions

Two novel heterometallic CuII-SrII coordination polymers based on 3,5-pyrazoledicarboxylic acid: synthesis, crystal structures and magnetic properties†

Yanmei Chen,ab   Lina Zheng,a   Shixiong She,a   Zhou Chen,b   Bin Hub  and  Yahong Li*ac  

* Corresponding authors

a Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, China
E-mail: liyahong@suda.edu.cn

b CAS Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, China

c State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, China

Abstract

The syntheses, crystal structures and magnetic properties are described for two novel 2D heterometallic CuII-SrII coordination polymers {Sr(H2O)6[(Im)4Cu4(pdc)4Sr(H2O)4]·6H2O}n (1) and [Cu2(H2O)2(pdc)2Sr(H2O)3]n (2) (H3pdc = 3,5-pyrazoledicarboxylic acid; Im = imidazole). The 1 : 1 : 1 : 5 reaction of SrCl2·6H2O, Cu(NO3)2·3H2O, H3pdc and imidazole in H2O–EtOH at 120 °C under autogenous pressure gave 1. Complex 2 was obtained from the 1 : 1 : 1 H3pdc/Sr(OH)2·8H2O/Cu(NO3)2·3H2O reaction mixture in H2O–EtOH under solvothermal conditions. Complex 1 can be described as a 2D grid-shaped network with the four CuII ions in a saddle-like conformation. In complex 2, SrII ions link metalloligands [Cu2(pdc)2(H2O)2]2− to generate a 2D layer framework. Variable-temperature solid-state dc magnetic susceptibility studies have been performed in the temperature range 2.0–300 K for complexes 1 and 2. Antiferromagnetic CuII⋯CuII exchange interactions were found for both 1 and 2.

Graphical abstract: Two novel heterometallic CuII-SrII coordination polymers based on 3,5-pyrazoledicarboxylic acid: synthesis, crystal structures and magnetic properties

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Article information

DOI
https://doi.org/10.1039/C1DT10034C
Article type
Paper
Submitted
10 Jan 2011
Accepted
21 Feb 2011
First published
21 Mar 2011

Dalton Trans., 2011,40, 4970-4975

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Two novel heterometallic CuII-SrII coordination polymers based on 3,5-pyrazoledicarboxylic acid: synthesis, crystal structures and magnetic properties

Y. Chen, L. Zheng, S. She, Z. Chen, B. Hu and Y. Li, Dalton Trans., 2011, 40, 4970 DOI: 10.1039/C1DT10034C

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