TiO₂光催化作用下半导体磷脂双分子层界面水合效应的证据。
Evidence for the hydration effect at the semiconductor phospholipid-bilayer interface by TiO2 photocatalysis.
作者信息
Suwalsky M, Schneider C, Mansilla H D, Kiwi J
机构信息
Faculty of Chemical Sciences, University of Concepcion, Casilla 160-C, Concepcion, Chile.
出版信息
J Photochem Photobiol B. 2005 Mar 1;78(3):253-8. doi: 10.1016/j.jphotobiol.2004.11.016.
The interactions of TiO2 with phospholipid bilayers found in cell membrane walls were observed to perturb the bilayer structure under UVA light irradiation. The structure changes in the phospholipid bilayers upon contact with TiO2 under light and in the dark were followed by X-ray diffraction. Hydration effects at the semiconductor-phospholipid interface played an important role in the degradation of dimyristoylphosphatidylcholine (DMPC) and dimyristoylphosphatidylethanolamine (DMPE) bilayers taken as cell wall lipid bilayer models. Evidence is provided that the fluidity of the phospholipid bilayers plays a significant role when interacting in the dark with the TiO2 or in processes mediated by TiO2 under light irradiation.
观察到在紫外线照射下，二氧化钛（TiO₂）与细胞膜壁中磷脂双层的相互作用会扰乱双层结构。通过X射线衍射跟踪了磷脂双层在光照和黑暗条件下与TiO₂接触时的结构变化。以二肉豆蔻酰磷脂酰胆碱（DMPC）和二肉豆蔻酰磷脂酰乙醇胺（DMPE）双层作为细胞壁脂质双层模型，半导体 - 磷脂界面的水合作用在其降解过程中起重要作用。有证据表明，磷脂双层的流动性在黑暗中与TiO₂相互作用或在光照下由TiO₂介导的过程中起重要作用。
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