重稀土元素与对硝基偶氮氯膦（CPA_PN）配合反应的研究  

Studies on the Coordinate Reactions of Heavy Rare-earth Element with P-nitrochlorophosphonazo

作　　者：赵泓[1] 戴立益[1] 廖夷戎 艾仁云 徐锋[1] 杨宝林[1] 朱传征[1] 

机构地区：[1]上海华东师范大学化学系,吴江松陵一中

出　　处：《华东师范大学学报（自然科学版）》1995年第2期50-54,共5页Journal of East China Normal University(Natural Science)

摘　　要：本文报导在ｐＨ＝１．４±０．１条件下，测定了重稀土元素与显色剂对销基偶氮氯膦形成配合物的吸收光谱、α型配合物的最大吸收波长λ（ｍａｘ），求得ＲＥ／ＣＰＡ_ｐＮ配合物的摩尔吸光系数。光度法研究Ｙ、Ｇｄ、Ｔｂ、Ｄｙ、Ｈｏ、Ｅｒ、Ｔｍ、Ｙｂ、Ｌｕ与ＣＰＡ_ｐＮ配合物的组成，并测定其α型配合物的积累稳定常数。重稀土元素与ＣＰＡ_ｐＮ在一定条件下亦能形成β型配合物，Ｙｂ－ＣＡＡ_ｐＮ的β峰在７３１ｎｍ处，并在此波长下测定Ｙｂ－ＣＰＡ_ｐＮ配合物由α型转化为β型的反应级数为一级，半衰期为３１．９分。The absorption spectrum of the heavy rare-earth complexes with CPA_pN and the maximum absorption wave length (λ_(max)) of α-form of relevent complexes are studied at pH =1.4±0. 1, and the molar absorption coefficient of the RE-CPA_pN complexes (RE = Y, Gd, Tb, Dy,Ho, Er, Tm, Yb, Lu) and the formation constants of the α-form of the relevent complexes are determined with the spectrophotometric method, the β-form of the relevent complexes can also be formed at certain condition. The peaks of absorption band of the β-form of the Yb-CPA_pN complexes is at 731nm, and the order of the reaction of the Yb-CPA_pN complex from α-form to β-form is the first order, its halftime is 31.9 minutes.

关 键 词：重稀土元素 对硝基偶氮氯膦 配合物 

分 类 号：O614.33[理学—无机化学]