摘要
The Chemical behavior of binary systems RE(III)-NEB(RE=La→Nd,Sm→Lu,Y;NEB=2,2′,2″nitrilotris(2,1ethanediyloxy)tris benzoic acid)were investigated potentiometrically at 25℃ and 020 mol/L(KNO3)ion strength in 50% methanolwater mixture.Computer programs MAGEC?MINIQUAD82 and MIQUV were employed for obtaining the results.It was found that two chemical models of binary complexes 112 and 111(RE∶L∶H,L=deprotonated NEB,H=proton)were existed in researching systems,and an apparent"tetrad effect"was also observed for the stability constants logβ112 and logβ111.In addition,the relative position of ytterbium was discussed.
The Chemical behavior of binary systems RE(III)-NEB(RE=La→Nd,Sm→Lu,Y;NEB=2,2′,2″nitrilotris(2,1ethanediyloxy)tris benzoic acid)were investigated potentiometrically at 25℃ and 020 mol/L(KNO3)ion strength in 50% methanolwater mixture.Computer programs MAGEC?MINIQUAD82 and MIQUV were employed for obtaining the results.It was found that two chemical models of binary complexes 112 and 111(RE∶L∶H,L=deprotonated NEB,H=proton)were existed in researching systems,and an apparent'tetrad effect'was also observed for the stability constants logβ112 and logβ111.In addition,the relative position of ytterbium was discussed.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2003年第2期267-269,共3页
Chemical Research and Application
