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Synthesis, Characterization and Polarographic Behaviour of Complexes of Thenoylpyrazolone-β-alanine
Li Jinzhou,Yang Yu,Zhang Xiaorui,Yu Zhigang
Author NameAffiliationE-mail
Li Jinzhou Department of Chemistry, Harbin Normal University, Harbin 150080 lijinzhou20@163.com  
Yang Yu Department of Chemistry, Harbin Normal University, Harbin 150080  
Zhang Xiaorui Department of Chemistry, Harbin Normal University, Harbin 150080  
Yu Zhigang Department of Chemistry, Harbin Normal University, Harbin 150080  
Abstract:
An ewacylpyrazolone Schiff base and its metal complexes were synthesized. The electrochemical behaviour of complexes was studied. In non-aqueous solvent, the new Schiff base 1-phenyl-3-methyl-4-(2-thenoyl)-5-pyrazolone-2-alanine (HL) was synthesized by the reaction of 2-alanine with 1-phenyl-3-methyl-4-(2-thenoyl)-5-pyrazolone and its complexes UO2(II), Cu(II), Co(II) and Fe(II) were obtained from refluxing a solution of Schiff base and metal nitrate. The polarographic wave of Cu(II) complex was determined at 1.24V(vs.SCE) in the medium of HAc-NaAc (PH=4.6). On the basis of elemental analysis and molar conductance, the general formula of the complexes, [UO2L2]?H2O,[CuL2]?2H2O,[CoL2]?2H2O and [FeL2]?2H2O, were given. They were characterized by IR, UV-visible, 1H NMR, 13CNMR, thermal analyses and magnetic moments. The results show that the metal ions except UO2 2+ exhibit six coordination in the complexes. The peak current is produced by the reduction of Cu2+ in the copper complex, and the number of electron transfer is 1 at electrode reaction.
Key words:  Thenoylpyrazolone, 2-alanine, Complex, Polarography
FundProject:
噻吩甲酰基吡唑啉酮缩β-丙氨酸配合物的合成、表征及极谱行为
李锦州*,杨昱,张晓蕊,俞志刚
摘要:
在非水溶剂中, β-丙氨酸与1-苯基-3-甲基-4-(2-噻吩甲酰基)吡唑啉酮-5反应合成新型酰基吡唑啉酮席夫碱化合物1-苯基-3-甲基-4-(2-噻吩甲酰基)吡唑啉酮-5缩β-丙氨酸(HL).通过回流席夫碱和金属硝酸盐合成了UO2(Ⅱ)、 Cu(Ⅱ)、 Co(Ⅱ)和Fe(Ⅱ)金属配合物.在乙酸-乙酸钠(pH=4.6)缓冲溶液﹑饱和甘汞电极体系中,测量电位-1.24 V处,测得铜配合物的极谱波.元素分析及摩尔电导值表明,新配合物的组成为[HO2L2]·H2O,[CuL2]·2H2O,[CoL2]·2H2O和[FeL2]·2H2O.运用红外光谱、紫外光谱、核磁共振谱、热谱和磁矩对配合物进行了表征.结果表明,配合物的中心离子(除UO22+以外)均为6配位.铜配合物的Cu2+还原产生峰电流,其电极反应转移1个电子.
关键词:  噻吩甲酰基吡唑啉酮, β-丙氨酸, 配合物, 极谱
DOI:10.1088/1674-0068/17/5/592-596
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