The monolayer structure of 1,2-bis(4-pyridyl)ethylene physisorbed on a graphite surface


Brewer, Adam Y., Friscic, Tomislav, Day, G.M., Overvoorde, Lois M., Parker, Julia E., Richardson, Chris N. and Clarke, Stuart M. (2012) The monolayer structure of 1,2-bis(4-pyridyl)ethylene physisorbed on a graphite surface. Molecular Physics, 1-7. (doi:10.1080/00268976.2012.702229).

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Description/Abstract

The crystalline monolayer of 1,2-bis(4-pyridyl)ethylene physisorbed on a graphite surface at 0.44 monolayers coverage has been observed and characterized by synchrotron X-ray diffraction and differential scanning calorimetry. The experimentally determined monolayer structure has p2 symmetry with lattice parameters a?=?17.77?Å, b?=?13.69?Å and ??=?39.7°. The unit cell contains two molecules, which are oriented in a plane parallel to the surface. It is proposed that the molecules are arranged such that they are able to form a weak C–H?···?N hydrogen bond between pyridine groups. The monolayer melts at 414?K, which is unusually close to the bulk melting point for a sub-monolayer coverage system. This molecule is chiral when adsorbed on the surface, but both isomers appear in the unit cell leading to no overall chirality in the monolayer.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1080/00268976.2012.702229
ISSNs: 0026-8976 (print)
1362-3028 (electronic)
Keywords: monolayer, synchrotron, physisorption, 1,2-bis(4-pyridyl)ethylene, graphite
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions : Faculty of Natural and Environmental Sciences > Chemistry
Faculty of Natural and Environmental Sciences > Chemistry > Organic Chemistry: Synthesis, Catalysis and Flow
?? uos2011-F6-EB-SM ??
ePrint ID: 343221
Accepted Date and Publication Date:
Status
10 July 2012Published
Date Deposited: 01 Oct 2012 13:35
Last Modified: 31 Mar 2016 14:34
URI: http://eprints.soton.ac.uk/id/eprint/343221

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