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钯(Ⅱ)-芳香氮碱-氨基酸三元配合物中的电子效应和芳环堆积作用 总被引:2,自引:0,他引:2
用pH-电位滴定法测定了Pd(L)(Aa)+三元配合物及相应的二元配合物,在25±O.5℃,30%的乙醇水溶液(体积分数),I=0.1(KNO3)条件下的稳定常数及表征常数.其中L=邻菲罗啉(phen)、苯并咪唑邻菲罗啉(PIP)、邻菲罗啉-5,6-二酮(dophen)、2,9-二甲基邻菲罗啉(dmphen)和联吡啶3,3′-二羧酸(BDA);Aa为甘氨酸(gly)、苯丙氨酸(phe)、酪氨酸(tyr)、S-苄基-半胱氨酸(bcys)、谷氨酰胺(glu)和γ-谷氨酰-α-萘胺(gnapa).从配合物配体间的电子效应和芳环堆积等观点对配合物的附加稳定性进行了讨论,并计算了电子效应和芳环堆积效应各自对三元配合物附加稳定性的贡献. 相似文献
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钯(Ⅱ)-芳香氮碱-氨基酸三元配合物中的电子效应和芳环堆积作用 总被引:3,自引:0,他引:3
用pH-电位滴定法测定了Pd(L)(Aa)+三元配合物及相应的二元配合物,在25±0.5℃,30%的乙醇水溶液(体积分数),I=0.1(KNO3)条件下的稳定常数及表征常数。其中L=邻菲罗啉(phen)、苯并咪唑邻菲罗啉(PIP)、邻菲罗啉-5,6-二酮(dophen)、2,9-二甲基邻菲罗啉(dmphen)和联吡啶3,3′-二羧酸(BDA);Aa为甘氨酸(gly)、苯丙氨酸(phe)、酪氨酸(tyr)、S-苄基-半胱氨酸(bcys)、谷氨酰胺(glu)和γ-谷氨酰-α-萘胺(gnapa)。从配合物配体间的电子效应和芳环堆积等观点对配合物的附加稳定性进行了讨论,并计算了电子效应和芳环堆积效应各自对三元配合物附加稳定性的贡献。 相似文献
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流动条件下两种不同亲水基团咪唑啉型缓蚀剂的缓蚀性能 总被引:3,自引:0,他引:3
选择了两种含有不同亲水基团的咪唑啉型缓蚀剂, 即1-胺乙基-2-十一烷基咪唑啉(AEI-11)和1-羟乙基-2-十一烷基咪唑啉(HEI-11), 分别在静态及动态条件下,采用失重法、极化曲线法、电化学阻抗谱法研究了上述缓蚀剂对N80钢在CO2饱和的3%(w)NaCl溶液中的缓蚀性能. 研究结果表明, 无论在静态和动态条件下, HEI-11均表现出更佳的缓蚀性能, 即咪唑啉型缓蚀剂的缓蚀性能与亲水基团的极性成正比; 在流动条件为5 m·s-1时, 缓蚀剂的缓蚀效率显著降低. 为了进一步研究缓蚀剂的缓蚀性能与其结构的关系, 运用量子化学法计算了缓蚀剂的EHOMO(最高占有分子轨道)、ELUMO(最低空分子轨道), 结果表明缓蚀剂的缓蚀效率与EHOMO成正比, 与ELUMO及ELUMO与EHOMO的差值驻E成反比. 相似文献
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A novel palladium(Ⅱ) complex [Pd(H2bpdc)Ala]Cl·3H2O (where H2bpdc is 2,2′-bipyridine-3,3′-dicar- boxylic acid and Ala is L-alanine) has been synthesized and characterized by IR spectra and elemental analysis. The crystal structure of the complex has been determined by single-crystal X-ray diffraction analysis. It crystallizes in triclinic system, space group P1 with a=0.685 5(2) nm, b=0.988 4(4) nm, c=1.349 6(4) nm, α=98.375(8)°, β= 97.900(15)°, γ=90.118(15)°, V=0.895 9(5) nm3, Z=2. In the molecule, Pd(Ⅱ) atom is four-coordinated and located at the centre of a planar quadrangle. The complex is assembled via intramolecular π-π stacking interactions and hydrogen bonds, which forms 2D network. The cyclic voltammetric behavior of the complex was also investigated. 相似文献
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1 INTRODUCTION As the first inorganic antitumor complex[1], cis- platin (cis-DDP) possesses prominent therapeutic ef- fect for encephaloma, lung cancer and several kinds of genital system tumors[2]. However, cis-DDP has toxic side-effect to a larger extent. Especially due to its damage to kidney, the dose is strictly limited[3]. Therefore, other Pt(II) complexes including carbon- platin were developed[4]. Pd(II) complex is struc- turally similar to Pt(II) complex, so the antitumor … 相似文献
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