{[Cu(phen)]3Cl4}2[GeMo12O40]: Synthesis, crystal structure and magnetic property of a new trinuclear copper complex based on germanomolybdate

Abstract

A new trinuclear copper complex based on germanomolybdate, {[Cu(phen)] 3 ( μ 2 -Cl) 4 } 2 [GeMo 12 O 40 ] ( 1 ) (phen = 1,10-phenanthroline), has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectroscopy, TG analysis, X-ray powder diffraction (XRPD) and single-crystal X-ray diffraction. Single crystal X-ray analysis reveals that the structural unit of 1 consists of two coordination cations {[Cu(phen)] 3 ( μ 2 -Cl) 4 } 2+ ( 1a ) and a saturated Keggin-type germanomolybdate polyoxoanion [GeMo 12 O 40 ] 4− . In 1 , the most intriguing feature is that each trinuclear copper cation {[Cu(phen)] 3 ( μ 2 -Cl) 4 } 2+ is constructed from three [Cu(phen)] 2+ cations bridged by four μ 2 -Cl atoms. Magnetic measurements indicate 1 shows the ferromagnetic exchange interactions within Cu II centers. A new trinuclear copper complex based on germanomolybdate {[Cu(phen)] 3 ( μ 2 -Cl) 4 } 2 [Ge Mo 12 O 40 ] (phen = 1,10-phenanthroline) has been hydrothermally synthesized. In the compound, the most intriguing feature is that each trinuclear copper cation {[Cu(phen)] 3 ( μ 2 -Cl) 4 } 2+ is constructed from three [Cu(phen)] 2+ cations bridged by four μ 2 -Cl atoms.