Scanning tunneling microscopy investigation of an inclusion complex between the beta-cyclodextrin and the sodium salt of the trisulfonated triphenylphosphine

Citation
A. Da Costa et al., Scanning tunneling microscopy investigation of an inclusion complex between the beta-cyclodextrin and the sodium salt of the trisulfonated triphenylphosphine, SURF SCI, 470(3), 2001, pp. 275-283
Citations number
23
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
SURFACE SCIENCE
ISSN journal
00396028 → ACNP
Volume
470
Issue
3
Year of publication
2001
Pages
275 - 283
Database
ISI
SICI code
0039-6028(20010101)470:3<275:STMIOA>2.0.ZU;2-3
Abstract
Scanning tunneling microscopy has been used to image on a highly orientated pyrolytic graphite substrate an inclusion complex between the sodium salt of the trisulfonated triphenylphosphine (TPPTS) and the beta -cyclodextrin (CyD). The images were in very good agreement with the structure that has b een reported for this inclusion complex and it is postulated that beta -CyD /TPPTS inclusion complex lies on the apolar graphite substrate by its prima ry face. A correlation of image contrast with the frontier orbitals of the inclusion complex is also clearly established for the first time in the cas e of CyD-based supramolecular assemblies. The self-assembly of the inclusio n complexes on the graphic surface is also discussed. (C) 2001 Elsevier Sci ence B.V. All rights reserved.