TY - JOUR
T1 - V(IV)O-Ln(III) complexes (Ln = La, Eu or Gd) of the compartmental ligand N,N′-bis(3-hydroxysalicylidene)ethylenediamine
AU - Sakamoto, Masatomi
AU - Ishikawa, Takashi
AU - Nishida, Yuzo
AU - Sadaoka, Yoshihiko
AU - Matsumoto, Akira
AU - Fukuda, Yutaka
AU - Sakai, Masahiro
AU - Ohba, Masaaki
AU - Sakiyama, Hiroshi
AU - Okawa, Hisashi
PY - 1996/5/1
Y1 - 1996/5/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0030145572&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030145572&partnerID=8YFLogxK
U2 - 10.1016/0925-8388(96)02226-8
DO - 10.1016/0925-8388(96)02226-8
M3 - Article
AN - SCOPUS:0030145572
SN - 0925-8388
VL - 238
SP - 23
EP - 27
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -