血红素在有序分子膜中的行为研究

本文研究了血红素(Heme)在硬脂酸(SA)单分子膜和Langmuir-B1odgett(LB)膜中的行为。Heme及其与SA的混合物均能在纯水亚相形成稳定的单分子膜。当摩尔分数x

The Investigation of Behavior of Heme in Ordered Molecular Films

The monolayer formation and the deposition of Langmuir-Blodgett films of the mixtures of Heme and stearic acid with different molar ratio were investigated. The result shows that they can form stable monolayer on pure water subphase. When xHeme＜0. 3, Heme lies on a‘face on 'position in the monolayer. When xHeme≥0.3, Heme lies on an‘edge on'position. The Langmuir-Blodgett(LB)films of Heme and its mixtures with stearic acid were deposited on the hydrophilic quartz plates.Some information about the orientation of Heme in LB films were obtained from the UV-visible and polarized UV-visible spectra, low angle X-ray diffraction, and fluorescent spectra. The absorbance of the mixed LB films of Heme-SA is greatly increased with the increase of deposition pressure or the molar fraction of Heme. Although the increase of absorbance may be resulted from the increase of the Heme concentration in LB films at higher surface pressure, most of the increase was resulted from the ordered arrangement of Heme molecules. These results provide a good guidance for the further research and applications of Heme derivatives.