谷胱甘肽和三氧化钨表面微观结构的AFM表征

Characterization of surface microstructure of glutathione and WO_3 by AFM

用AFM表征了络合锌的谷胱甘肽与三氧化钨溶胶掺铂晶化薄膜的表面分子结构,结果表明:络合锌的谷胱甘肽的分子为七连环状结构,七连环上的两个离子或离子基团与两条长链相连,一个离子或离子基团与一条短链相连;这解释了谷胱甘肽与Zn2+、Fe3+等过渡金属离子络合并使其被螯离,消除了其氧化性,从而提高了谷胱甘肽的抗氧化性．三氧化钨溶胶掺铂薄膜经460℃热处理后晶化,其元胞为正六面体,内含一个WO6八面体,氧离子位居六个面心,钨离子处于体心,自然生长面为002面,晶格常数为(0．75±0．05)nm,氧离子的间距为(0．55±0．05)nm．解释了谷胱甘肽与Zn2+、Fe3+等过渡金属离子络合并使其被螯离,从而消除了其氧化性,以及掺杂一定含量的铂后改善了三氧化钨溶胶的氢敏特性的机理．

The molecular morphosis of glutathione adulterated with zinc and WO3 sol crystal film adulterated with platinum were investigated by AFM.IPC-208B. The results show that the molecular structure of glutathione adulterated with zinc is heptagonal annularity, on which two ions （or ion groups） and one ion （or ion group） are connected with two long-chains and one short-chain, respectively; WO3 sol film adulterated with platinum has been cubic crystal after annealing at 460 ℃, its crystal cell includes a WO6 octahedron in which six oxygen ions locate in the center of six planes of cube and one tungsten ion locates in the center of cube, its natural growth surface is （002） plane, and its lattice parameter is about （0.15±0.05） nm and the distance between adjacent oxygen ions is about （0.55± 0.05）nm. The complexation between glutathione and the transitional metal ions（such as Zn^2＋ and Fe^3＋） and the chelation of these transitional metal ions were explained, which removes their oxidizability. The property sensitive to hydrogen of WO3 sol film is greatly improved by adulteration of platinum.