Published in
American Chemical Society, Journal of the American Chemical Society, 49(125), p. 14968-14969, 2003
DOI: 10.1021/ja037407z
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Bias-Dependent Visualization of Electron Donor (D) and Electron Acceptor (A) Moieties in a Chiral DAD Triad Molecule
,
Zhijian Chen,
I. Hiroshi Uji,
Hiroshi Uji-I.,
Steven De Feyter ,
Magdalena Zdanowska,
Pascal Jonkheijm,
Aphj Albert Schenning,
Albertus P. H. J. Schenning,
Ew Bert Meijer,
E. W. Meijer,
Frank Würthner,
Fc Frans De Schryver,
Frans C. De Schryver
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Abstract
The 2D crystal lattice structure and bias-dependent contrast of a chiral electron donor-acceptor-donor triad system, composed of two oligo(p-phenylene vinylene) electron donors and a perylenediimide electron acceptor (OPV4-PDI-OPV4), have been studied by means of scanning tunneling microscopy (STM) at the liquid-graphite interface. OPV4-PDI-OPV4 is ordered in rows and forms a well-ordered 2D crystal lattice structure. The electrical properties of the donor and acceptor parts are distinguished by the contrast in bias-dependent STM imaging.