Mononuclear oxovanadium(IV) complex VO(H2dhbaen) and heteronuclear oxovanadium(IV)-lanthanide(III) complexes VOLn(dhbaen)(NO3)(H2O)2.5 were synthesized, where H4dhbaen denotes N,N′-bis(3-hydroxysalicylidene)ethylenediamine. IR spectra showed that V(IV)O and Ln(III) ions are located at the endogenous N2O2- and the exogeneous O4-coordination sites of the ligand respectively. Based on circular dichroism (CD) spectra, it was suggested that amino alcohols are specifically bound at the VO-Ln heterometal center, through the nitrogen to the VO-site and through the oxygen to the Ln-site. Magnetic susceptibility measurements in the range 4.2 to 260 K revealed that the magnetic interaction between V(IV)O and Gd(III) ions is almost negligible. The fluorescence intensity of mononuclear Eu(III) complex markedly decreased on forming the heteronuclear V(IV)O-Eu(III) complex.
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry