文献类型：期刊文献

英文题名：Hydrogen Bonding Controls the Dynamics of Catechol Adsorbed on a TiO₂(110) Surface

作者：Li, Shao-Chun[1];Chu, Li-Na[2];Gong, Xue-Qing[2];Diebold, Ulrike[1,3]

机构：[1]Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA;[2]E China Univ Sci & Technol, Labs Adv Mat, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[3]Vienna Univ Technol, Inst Appl Phys, A-1040 Vienna, Austria

年份：2010

卷号：328

期号：5980

起止页码：882

外文期刊名：SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000277618800045)】；

基金：S. L. and U. D. acknowledge financial support by the U.S. Department of Energy (grant DE-FG02-05ER15702) and by NSF (grant CHE-0715576). X. Q. G. is grateful for financial support from the National Nature Science Foundation of China (grant 20703017) and the 111 project (grant B08021). Valuable discussions with A. Selloni are gratefully acknowledged.

语种：英文

摘要：Direct studies of how organic molecules diffuse on metal oxide surfaces can provide insights into catalysis and molecular assembly processes. We studied individual catechol molecules, C6H4(OH)(2), on a rutile TiO2(110) surface with scanning tunneling microscopy. Surface hydroxyls enhanced the diffusivity of adsorbed catecholates. The capture and release of a proton caused individual molecules to switch between mobile and immobile states within a measurement period of minutes. Density functional theory calculations showed that the transfer of hydrogen from surface hydroxyls to the molecule and its interaction with surface hydroxyls substantially lowered the activation barrier for rotational motion across the surface. Hydrogen bonding can play an essential role in the initial stages of the dynamics of molecular assembly.