1,4-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)丁二酮-(1,4)双缩邻氨基苯甲酸合双锌配合物的合成及性质

SYNTHESIS AND PROPERTIES OF A NEW Zn(Ⅱ)BINCLEAR COMPLEX OF THE SCHIFF BASE DERIVED FROM AMINOACID AND BIS β DIKETONATE

本文报导１，４－双（１′－苯基－３′－甲基－５′－氧代吡唑－４′－基）丁二酮（１，４）双缩邻氨基苯甲酸合双锌配合物的合成、表征、热分解反应动力学及电化学性质。运用Ａｃｈａｒ法与Ｃｏａｔｓ－Ｒｅｄｆｅｒｎ法对非等温动力学数据进行分析，推断第三步非等温热分解过程动力学方程为：ｄα／ｄｔ＝３／２Ａｅ－Ｅ／ＲＴ·（１－α）４／３［（１／（１－α）１／３－１］－１。第四步非等温热分解过程为一维扩散机理。其动力学方程为：ｄα／ｄｔ＝Ａｅ－Ｅ／ＲＴ·１／２α，运用粉末微电极技术测试了配合物的电化学性质，推断配合物为双电子一步的不可逆过程。

A new Zn(Ⅱ) binuclear coordination compound of the schiff base derived from anthranilic acid and 1,4 bis (1′ phenyl 3′ methyl 5′ pyrazolone 4′) 1,4 butanedione(BPMPBD) has been synthesized and characterized by elemental analys,IR,thermogravimetric analysis measurements and electrochemical studies.The non isothermal kinetic for the third and the fourth stages of thermal decomposition of the complex were studied from the TG DTG curves by means of the Achar and Coats Redfern methods.The results show that the kinetic equations can be expressed as fllows: step3 dα/dt=3/2A e -E/RT ·(1-α) 4/3 [(1/1-α) 1/3 -1] -1 step4 dα/dt=A e -E/RT ·1/2α. The electrochemical behavior of insoluble solid complex has been studied by means of powder microelectodes technique.