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 ν = 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 |
|---|---|
| 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 > Molecular Assembly, Function & Structure Faculty of Natural and Environmental Sciences > Chemistry > Structure & Materials Group |
| Item ID: | 343221 |
| Date Deposited: | 01 Oct 2012 13:35 |
| Last Modified: | 01 Oct 2012 13:35 |
| Contributors: | Brewer, Adam Y. (Author) Friscic, Tomislav (Author) Day, G.M. (Author) Overvoorde, Lois M. (Author) Parker, Julia E. (Author) Richardson, Chris N. (Author) Clarke, Stuart M. (Author) |
| Date: | 10 July 2012 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/343221 |
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