Two new 2D organic–inorganic hybrids assembled by lanthanide-substituted polyoxotungstate dimers and copper–complex linkers.

Two new organic–inorganic hybrid copper–lanthanide heterometallic polyoxometalates (POMs), [Cu(dap) 2 ] 3.5 [Cu(dap) 2 (H 2 O)] 3 [La( α -SiW 11 O 39 ) 2 ]·5H 2 O ( 1 ) and H[Cu(dap) 2 (H 2 O)][Cu(dap) 2 ] 4 [Eu( α -PW 11 O 39 ) 2 ]·13H 2 O ( 2 ) (dap = 1,2-diaminopropane), have been made under hydrothermal conditions and characterized by elemental analyses, IR spectra, XRD, thermogravimetric (TG) analyses and X-ray single-crystal diffraction. They both display interesting 2D organic-inorganic hybrid POMs containing 3d-4f cations and organic dap ligands. To the best of knowledge, 1 represents the first 2D Cu–Ln heterometallic silicotungstate assembled by [La( α -SiW 11 O 39 ) 2 ] 13 − dimers and [Cu(dap) 2 ] 2 + linkers, while 2 is a new 2D Cu-Eu heterometallic Keggin-type phosphotungstate with dap ligands. Furthermore, the variable-temperature magnetic susceptibility of 2 has been investigated. [ABSTRACT FROM AUTHOR]