Reaction of Phthalocyanines with Graphene on Ir(111)
详细信息 查看全文
- 作者：Simon J. Altenburg ; Marie Lattelais ; Bin Wang ; Marie-Laure Bocquet ; Richard Berndt
- 刊名：Journal of the American Chemical Society
- 出版年：2015
- 出版时间：July 29, 2015
- 年：2015
- 卷：137
- 期：29
- 页码：9452-9458
- 全文大小：604K
- ISSN：1520-5126
文摘
Iron phthalocyanine (FePc) is adsorbed to graphene on Ir(111) at cryogenic temperature. In addition to mobile FePc with four lobes, imaging and spectroscopy with a scanning tunneling microscope reveal immobile molecules that exhibit fewer lobes. A reversible transformation between four- and three-lobed molecules has been induced by current injection. The data are consistent with chemical bonding of lobes to graphene on Ir, pinning down the graphene area toward Ir. Similar observations are made from NiPc, CoPc, CuPc, and H2Pc. The experimental findings can be explained by ab initio calculations, which suggest that a Diels鈥揂lder-type reaction may be involved with an allyl unit of graphene in the top-fcc moir茅 registry.