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Citation: DIAO Yu-Xia, ROHDE Dirk, WAN Li-Jun. Ordered Self-assembled Monolayers of β-dicarbonyl Derivatives Studied by STM[J]. Acta Physico-Chimica Sinica, ;2006, 22(06): 691-695. doi: 10.1016/S1872-1508(06)60028-4 shu

Ordered Self-assembled Monolayers of β-dicarbonyl Derivatives Studied by STM

1.
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China

Received Date: 16 December 2005
Available Online: 31 May 2006

The adsorption of four β-dicarbonyl derivatives on highly oriented pyrolytic graphite (HOPG) surface was studied by scanning tunneling microscopy (STM) in an ambient environment. All the molecules include π-conjugated part and alkyl chains in their chemical structures. The molecules were dissolved in toluene and a drop of the solution was deposited on HOPG to form self-assembled adlayer. The characteristic stripe-like structure in the self-assembled monolayer (SAM) on the high-resolution STM images of the compounds was observed. Different molecular structures led to different SAMs. It was found that noncovalent interactions such as hydrogen bonds and dipole-dipole interactions played an important role in the formation of different SAMs.
- Scanning tunneling microscopy;β-dicarbonyl derivatives;Self-assembled monolayer;HOPG
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