Crystal engineering in two dimensions: An approach to molecular nanopatterning

Nath, Krishna G., Ivasenko, Oleksandr, MacLeod, Jennifer M., Miwa, Jill A., Wuest, James D., Nanci, Antonio, Perepichka, Dmitrii F., & Rosei, Federico (2007) Crystal engineering in two dimensions: An approach to molecular nanopatterning. The Journal of Physical Chemistry C, 111(45), pp. 16996-17007.

View at publisher


We describe a surprising cooperative adsorption process observed by scanning tunneling microscopy (STM) at the liquid−solid interface. The process involves the association of a threefold hydrogen-bonding unit, trimesic acid (TMA), with straight-chain aliphatic alcohols of varying length (from C7 to C30), which coadsorb on highly oriented pyrolytic graphite (HOPG) to form linear patterns. In certain cases, the known TMA “flower pattern” can coexist temporarily with the linear TMA−alcohol patterns, but it eventually disappears. Time-lapsed STM imaging shows that the evolution of the flower pattern is a classical ripening phenomenon. The periodicity of the linear TMA−alcohol patterns can be modulated by choosing alcohols with appropriate chain lengths, and the precise structure of the patterns depends on the parity of the carbon count in the alkyl chain. Interactions that lead to this odd−even effect are analyzed in detail. The molecular components of the patterns are achiral, yet their association by hydrogen bonding leads to the formation of enantiomeric domains on the surface. The interrelation of these domains and the observation of superperiodic structures (moiré patterns) are rationalized by considering interactions with the underlying graphite surface and within the two-dimensional crystal of the adsorbed molecules. Comparison of the observed two-dimensional structures with the three-dimensional crystal structures of TMA−alcohol complexes determined by X-ray crystallography helps reveal the mechanism of molecular association in these two-component systems.

Impact and interest:

83 citations in Scopus
Search Google Scholar™
83 citations in Web of Science®

Citation counts are sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 89933
Item Type: Journal Article
Refereed: Yes
DOI: 10.1021/jp0762774
ISSN: 1932-7455
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2007 American Chemical Society
Deposited On: 06 Apr 2016 02:54
Last Modified: 06 Apr 2016 02:54

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page