Abstract
Two new organic–inorganic polyoxometalates [Cu(dien)(H2O)]2{[Cu2(dien)2(OH)]2[Cu4(B-α-XW9O33)2]}·4H2O (X = Sb, 1; X = As, 2) (dien = diethylenetriamine) were hydrothermally synthesized and characterized by elemental analysis, IR spectra, thermogravimetric (TG) analyses, and single-crystal X-ray diffraction. Both compounds are constructed from one four-coordinate [Cu(dien)(H2O)]2+, one {[Cu2(dien)2(OH)]2[Cu4(B-α-XW9O33)2]} building unit, and four water molecules of crystallization. Structural analysis shows that the sandwich-like polyoxotungstate cluster anions [Cu4(B-α-XW9O33)2]10− are linked by six adjacent dimeric cations [Cu2(dien)2(OH)]3+ into a 2-D architecture with a (6,3)-connected topology. Magnetic measurements of 1 and 2 exhibit the presence of antiferromagnetic interactions within the tetranuclear-CuII cluster.
Graphical Abstract
Two new organic–inorganic polyoxometalates with 2-D (6,3)-connected topology architecture [Cu(dien)(H2O)]2{[Cu2(dien)2(OH)]2[Cu4(B-α-XW9O33)2]}·4H2O (X = Sb, 1; X = As, 2) (dien = diethylenetriamine) were hydrothermally synthesized.
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