Synthesis and Complexation Properties of N,N-Bis(phosphinomethyl)amine as a New Class of 1-Aminophosphinic Acids with Transition Metals and Lanthanide Ions in Aqueous Solution

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• 作者：Babak Kaboudin ; Fariba Saadati ; Azadeh Golshan ; Hamid Abdollahi ; Tsutomu Yokomatsu
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2011
• 出版时间：September 8, 2011
• 年：2011
• 卷：56
• 期：9
• 页码：3651-3656
• 全文大小：767K
• 年卷期：v.56,no.9(September 8, 2011)
• ISSN：1520-5134

文摘

The treatment of aromatic aldehydes with ammonia and hypophosphorus acid gave novel C₂-symmetric N,N-bis(phosphinomethyl)amines as a new class of 1-aminophosphinic acid compounds. Complexation properties of N,N-bis(phosphinomethyl)amines with transition metals such as Co²⁺, Ni²⁺, Zn²⁺, Cu²⁺, and Cd²⁺ and lanthanide ions La³⁺ and Gd³⁺ were studied in aqueous solution by the pH-potentiometric method. Dissociation constants (pK) of the compound were determined by the pH-potentiometric technique. The complexation studies with compound dl-2a showed the best fit of the titration curves were obtained when the ligand鈥搈etal stoichiometric ratio was 1:1 and 2:1.