Solvent effect on the structures of three manganese complexes based on azotetrazole-3-hydroxy-2-naphthoic acid: synthesis, structures, and magnetic and fluorescent properties

Three Mn II complexes, named Mn 2 (HATNA) 2 (CH 3 OH) 4 ( 1 ), {[Mn 3 (ATNA) 2 (DMF) 2 (H 2 O) 2 ]·0.5DMF·0.5H 2 O} n ( 2 , DMF = N , N -dimethylformamide), and {[Mn 6 (ATNA) 4 (H 2 O) 10 ]·8DMSO·2.5H 2 O} n ( 3 , DMSO = dimethyl sulphoxide), were successfully synthesized by the reaction of the ligand azotetrazole-3-hydroxy-2-naphthoic acid (H 3 ATNA) and Mn(CH 3 COO) 2 in CH 3 OH, DMF, and DMSO, respectively. A binuclear structure was found for complex 1 , with the two Mn( ii ) ions doubly bridged through N-N linkers from the two tetrazole rings. Both 2 and 3 displayed one-dimensional structures. Magnetic studies show that antiferromagnetic interactions of Mn( ii ) ions existed in complexes 1-3 . All the complexes exhibited luminescence emission peaks at room temperature. Three different Mn( ii ) complexes based on azotetrazole-3-hydroxy-2-naphthoic acid were successfully synthesized using CH 3 OH, DMF and DMSO as the solvent, respectively. Magnetic and fluorescent properties of three complexes were studied.