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Three new Keggin polyoxometalates, [Zn(phen) 3 ] 2 [SiW 12 O 40 ]·5H 2 O(1), [Co(phen) 3 ] 2 [SiW 12 O 40 ](2) and [Ni(phen) 3 ] 2 [SiW 12 O 40 ]·2H 2 O(3)(phen=1,10′-phenanthroline) have been hydrothermally synthesized and characterized by elemental analysis, IR, crystal X-ray diffraction, thermogravimetric analyses(TGA) and fluorescence techniques. Complex 1, crystallized in the triclinic space group P1, consists of one [SiW 12 O 40 ] 4– anion, two discrete [Zn(phen) 3 ] 2+ cations and five crystal water molecules. Complexes 2 and 3 have the similar configuration to complex 1, but they crystallized in the monoclinic space group C2/c. Variable-temperature magnetic susceptibilities of complexess 2 and 3 reveal antiferromagnetism and ferromagnetism, respectively.
Three new Keggin polyoxometalates, [Zn (phen) 3] 2 [SiW 12 O 40] · 5H 2 O (1), [Co (phen) 3] 2 [SiW 12 O 40] 3] 2 [SiW12O40] .2H20 (3) (phen = 1, 10’-phenanthroline) have been hydrothermally synthesized and characterized by elemental analysis, IR, crystal X- ray diffraction, thermogravimetric analyzes (TGA) and fluorescence techniques. Complex 1, crystallized in the triclinic space group P1, consists of one [SiW 12 O 40] 4-anion, two discrete [Zn (phen) 3] 2+ cations and five crystal water molecules. the similar configuration to complex 1, but they crystallized in the monoclinic space group C2 / c. Variable-temperature magnetic susceptibilities of complex 2 and 3 reveal antiferromagnetism and ferromagnetism, respectively.