| 分光光度法研究镧与间硝基偶氮氯膦(CPAmN)的络合物形成反应 |
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| 引用本文： | 徐钟隽,潘教麦,胡昭圣,贾锡平. 分光光度法研究镧与间硝基偶氮氯膦(CPAmN)的络合物形成反应[J]. 高等学校化学学报, 1983, 4(1): 48 |
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| 作者姓名： | 徐钟隽 潘教麦 胡昭圣 贾锡平 |
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| 作者单位： | 华东师范大学化学系 |
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| 摘 要： | 本文研究了CPAmN试剂的特性、La-GPAmN络合物的组成和β-型络合物的生成条件,并测定了其积累稳定常数。
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| 收稿时间： | 1981-02-12 |
SPECTROPHOTOMETRIG STUDY ON THE COMPLEX FORMATION BETWEEN LANTHANUM AND CHLOROPHOSPHONAZO-m-NO2 (CPAmN) |
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| Xu Zhongjun(Hsu Chung-gin),Pan Jiaomai,Hu Zhaosheng(Hu Chao-sheng),Jia Xiping. SPECTROPHOTOMETRIG STUDY ON THE COMPLEX FORMATION BETWEEN LANTHANUM AND CHLOROPHOSPHONAZO-m-NO2 (CPAmN)[J]. Chemical Research In Chinese Universities, 1983, 4(1): 48 |
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| Authors: | Xu Zhongjun(Hsu Chung-gin) Pan Jiaomai Hu Zhaosheng(Hu Chao-sheng) Jia Xiping |
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| Affiliation: | Department of Chemistry, East China Normal University, Shanghai |
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| Abstract: | Protonation of chlorophosphonazo-m-NO2 takes place in acidic medium (Ig Kp = -2.11) while dissociation of the first hydroxyl group from naphthalene ring is shifted toward the basic region (pKα= 10.21) .Various complexes of La-CPAmN are formed in the pHrange of 1.5-2.0. The mole ratios La/CPAmN of these complexes have been estimated to be 1:1, 1:2 and 1:3 by Job's continuous variation method and the equilibrium shift method. The β-type complex (1:1) giving a characteristic maximum absorption at 715 nm is formed under a certain experimental condition.The 1:3 complex existed in the excess of reagent is very stable in acidic medium with an overall stability constant lg Ks, of 45.40. |
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