摘要
在ClCH2 COOH CH3COONa介质中 ,稀土和对磺胺偶氮溴膦 (BPA pSN)可以形成 β型同核及异核络合物 .β型同核络合物的组成为RE∶BPA pSN =1∶2 ,β型异核络合物的组成为RE1(重稀土 )∶BPA pSN∶RE2 (轻稀土 ) =1∶3∶1.对形成 β型络合物的可能机理进行了探讨 :形成 β型异核络合物的可能机理是当轻、重稀土同时存在时 ,重稀土和对磺胺偶氮溴膦形成的 β型络合物诱导了轻稀土和对磺胺偶氮溴膦形成的α型络合物向 β型络合物的转化 .
The behavior of forming homo and iso nuclear β type chelates of rare earth ions(RE 3+ )with p sulphoaminobromophosphonazo(BPA pSN)in ClCH 2COOH CH 3COONa buffer solutions were studied by a spectrophotometric method.The composition of homo nuclear β type chelates is RE∶BPA pSN=1∶2 and the composition of iso nuclear β type chelates is RE 1(light rare earth ion)∶BPA pSN∶RE 2(heavy rare earth ion)=1∶3∶1.The machanism of forming iso nuclear β type chelates was proposed as the homo nuclear β type chelates induce α type chelates transfering into β type chelates when the light and heavy rare earth ions coexist.
出处
《西北师范大学学报（自然科学版）》
CAS
2001年第1期56-59,共4页
Journal of Northwest Normal University(Natural Science)
基金
甘肃省教委科研资助课题!( 961 2 3)
