Oxidation of an Organic Adlayer: A Bird鈥檚 Eye View
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- 作者：Thomas Waldmann ; Daniela K眉nzel ; Harry E. Hoster ; Axel Gro脽 ; R. J眉rgen Behm
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：May 30, 2012
- 年：2012
- 卷：134
- 期：21
- 页码：8817-8822
- 全文大小：375K
- 年卷期：v.134,no.21(May 30, 2012)
- ISSN：1520-5126
文摘
The reaction of O2 with an adlayer of the oligopyridine 2-phenyl-4,6-bis(6-(pyridine-2-yl)-4-(pyridine-4-yl)-pyridine-2-yl)pyrimidine (2,4鈥?BTP), adsorbed on the (111) surfaces of silver and gold and on HOPG 鈥?which can be considered as a model system for inorganic|organic contacts 鈥?was investigated by fast scanning tunneling microscopy (video STM) and dispersion corrected density functional theory (DFT-D) calculations. Only on Ag(111), oxidation of the 2,4鈥?BTP adlayer was observed, which is related to the fact that under the experimental conditions O2 adsorbs dissociatively on this surface leading to reactive O adatoms, but not on Au(111) or HOPG . There is a distinct regiospecifity of the oxidation reaction caused by intermolecular interactions. In addition, the oxidation leads to a chiral ordering. The relevance of these findings for reactions involving organic monolayers is discussed.