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§1.前言最近十几年来对于氨羧酸螯溶剂的性质及其与金属离子所形成的络合物已进行了比较广泛而深入的研究,其中特别是对乙二胺四乙酸(EDTA),不论是在络合物的形成、性质、结构等方面,或者在它的应用方面,都已有比较丰富和完整的资料。氨羧酸螯溶剂一般可以亚氨基二乙酸(IMDA)为典范,而亚氨基二乙酸本身又可以看作是氨乙酸的羧酸取代物。如以氨乙酸(或氨丙酸)为母体,则在氨基上接上各种取代物可以形成许多N—O型络合剂。到目前为止,被研究过的,主要是脂肪族烷基[CH_3—(CH_2)_n—,n=0,1,2,…包括i—C_3H_7—等],羧酸基[—CH_2—(CH_2)_n—COOH,n=0,1,2],脂肪族
§1. Preface The properties of the carboxylic acid chelating agents and their complexes with metal ions have been studied extensively and intensively in recent ten years, especially for ethylenediaminetetraacetic acid (EDTA) Whether in the formation of complex, nature, structure, etc., or in its application, there are abundant and complete information. Ammonia carboxylic acid chelating agents are generally imino diacetic acid (IMDA) as a model, and iminodiacetic acid itself can be seen as a carboxylic acid substitute of acetic acid. Such as amino acid (or aminopropionic acid) as the mother, the amino group connected to a variety of substitution can form a lot of N-O type complexing agent. So far, it has been mainly studied that the aliphatic alkyl [CH_3- (CH_2) _n-, n = 0, 1, 2, ... includes i-C_3H_7- etc.], the carboxylic acid group [-CH_2- ) _n-COOH, n = 0,1,2], aliphatic