Synthesis, characterization and luminescence study of dimethyl[N-arylmethylenethiobenzahydrazonato]indium

Five dimethylindium complexes of type Me2InL [L = N-(4-methoxy)benzylidenethiobenzahydrazonato (1), N-(3,4-dimethoxy)benzylidenethiobenzahydrazonato (2), N-(4-N,N-dimethylamino)benzylidenethiobenzahydrazonato (3), N-(2-naphthyl)methylene thiobenzahydrazonato (4) and N-(9-anthryl)methylenethiobenzahydrazonato (5)] have been synthesized by reaction of trimethylindium with appropriate N-arylmethylenethiobenzahydrozones. The complexes obtained have been characterized by elemental analysis, 1H NMR, IR and mass spectroscopy. Compounds 1-5 emit blue colors at λmax = 432-479 nm when irradiated by UV light. The electroluminescent (EL) properties of 1-5 were examined by fabricating EL devices using 1-5 as emitter, respectively. The EL bands are located in the green region (513-578 nm).