三元混配配合物[Pd(phen)(gnapa)]^+在乙醇/水混合介质中稳定性的研究  

Study on Stability of Ternary Complexes [Pd(phen)(gnapa)]^+ in Mixed Medium H_2O/C_2H_5OH

作　　者：兰丽艳[1] 刘瑕[1] 孙亚光[1] 高恩君[1] 

机构地区：[1]沈阳化工学院应用化学学院,辽宁沈阳110142

出　　处：《沈阳化工学院学报》2007年第3期163-166,共4页Journal of Shenyang Institute of Chemical Technolgy

摘　　要：用pH电位滴定法测定了以Pd2+为中心离子,以1,10-邻菲洛啉(phen)为第一配体,以γ-L-谷氨酰-α-萘胺(gnapa-)为第二配体的[Pd(phen)(gnapa)]+型混合配体配合物在37℃下,I(离子强度)=0.1(NaCl),乙醇/水混合介质(乙醇体积分数为10%2、0%3、0%4、0%5、0%)条件下的稳定常数lgK及表征常数ΔlgK、,并与[Pd(phen)(gly)]+体系比较,求出phen和gnapa-发生芳环堆砌作用的份额,发现乙醇体积分数为30%时,非配位侧基发生最佳堆砌,说明溶剂组成对于三元配合物的稳定性有重要影响,并从分子内配体间的弱相互作用及溶剂化角度对配合物稳定性进行讨论.The stability constant lg K of the Pd（ Ⅱ）-phen-gnapa Ternary Complexes has been determined, when the volume fraction of the organic solvent C2H5OH is 10 %, 20 %, 30 %, 40 % and 50 %, respectively, at 37℃ and I = 0.1 NaCl, by pH potential titration. The relevant characteristic constants, Alg K, of the ternary complexes have been calculated. With the Pd（ Ⅱ ）-phen-gly ternary complexes being comparable system, The aromatic ring stacking percent has been calculated. The aromatic ring stacking percent is max, when the volume fraction of the organic solvent, C2H5OH is 30 %, that shows the stability of the ternary Complexes is influenced by the solvent composition.

关 键 词：钯(Ⅱ) 稳定常数 γ-L-谷氨酰-α-萘胺 芳环堆砌 介质 

分 类 号：TQ247.51[化学工程—有机化工]