Five manganese complexes of Schiff b ase were synthesized:[Mn Ⅳ,Ⅳ (μ-O)(Salen)] 2 ·DMF ·H 2 O(1),[Mn Ⅳ,Ⅳ (μ-O)(5-BrSalen)] 2 ·DMF ·0.5H 2 O(2),[Mn Ⅳ,Ⅳ (μ-O)]al(1,2-pn)[nr 2 ·H 2 O(3),]Mn Ⅳ,Ⅳ (μ-O)[5-Br-Sal(1,2-pn)]r 2 ·H 2 O(4),[Mn Ⅳ,Ⅳ (μ-O)]5-CH 3 -Sal(1,2-pn)5-CH 3 -Sal(1,2-pn)[ 2 ·2H 2 O(5),and were characterized by element analysis,IR and UV-Vis spec tra.The results of cyclic voltammogram show that Schiff base ligands can drop the potential of manganese and s teady high oxide state of manganese.The magnetic properties of1and3have also been studied.The results show t hat there is a weak ferromagneticall y coupling of Mn Ⅳ2 pair at room and low temperature,and the interactions o f complex3are weaker than complex1.
