Two hybrid polyoxometalate-pillared metal-organic frameworks

Two polyoxometalate-pillared 3D compounds, {Cu-5(2-ptz)(6)(H2O)(4)(SiW12O40)}center dot 4H(2)O 1 and {Cu-9(2-ptz)(12)(H2O)(6)(PMo12O40)(2)}center dot H2O 2 (2-ptz = 5-(2-pyridyl) tetrazole) have been constructed based on different polyoxometalate anions, and copper-organic coordination polymer sheets by a hydrothermal method. Magnetic investigations reveal that both 1 and 2 exhibit antiferromagnetic coupling between the Cu-II ions. Structural studies show the compound 1 exhibits a typical pcu-type net with the Schalfli symbol of {4(12).6(3)}, and that compound 2 is a (3,4,6)-connected framework with novel {4(4).6(10).10}{6(3)}(2){6(5).8} topology which has not been reported to date.