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Syntheses, crystal structures and properties of novel copper(II) complexes obtained by reactions of copper(II) sulfate pentahydrate with tripodal ligands.

Dalton transactions (Cambridge, England : 2003) (2005-04-13)
Wei Zhao, Jian Fan, You Song, Hiroyuki Kawaguchi, Taka-aki Okamura, Wei-Yin Sun, Norikazu Ueyama
ABSTRACT

Three novel metal-organic frameworks (MOFs), [Cu(1)SO4].H2O (4), [Cu2(2)2(SO4)2].4H2O (5) and [Cu(3)(H2O)]SO4.5.5H2O (6), were obtained by hydrothermal reactions of CuSO4.5H2O with the corresponding ligands, which have different flexibility. The structures of the synthesized complexes were determined by single-crystal X-ray diffraction analyses. Complex 4 has a 2D network structure with two types of metallacycles. Complex 5 also has a 2D network structure in which each independent 2D sheet contains two sub-layers bridged by oxygen atoms of the sulfate anions. Complex 6 has a 2D puckered structure in which the sulfate anions serve as counter anions, which are different from those in complexes 4 (terminators) and 5 (bridges). The different structures of complexes 4, 5 and 6 indicate that the nature of organic ligands affected the structures of the assemblies greatly. The magnetic behavior of complex 5 and anion-exchange properties of complex 6 were investigated.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Copper(II) sulfate pentahydrate, ACS reagent, ≥98.0%
Sigma-Aldrich
Copper(II) sulfate pentahydrate, puriss., suitable for, meets analytical specification of Ph. Eur., BP, USP,FCC
Sigma-Aldrich
Copper(II) sulfate, puriss., meets analytical specification of Ph. Eur., BP, USP, anhydrous, 99-100.5% (based on anhydrous substance)
Sigma-Aldrich
Copper(II) sulfate pentahydrate, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99-102%
Sigma-Aldrich
Copper(II) sulfate hydrate, 98%