Chemical structure, aggregate structure and optical properties of adsorbed dye molecules investigated by scanning tunnelling microscopy

摘要

We describe in this Letter experiments on three related cyanine dye molecules and their aggregation on silver bromide model surfaces. By using a combination of diffuse reflectance spectroscopy, scanning tunnelling microscopy and molecular modelling, insight has been gained in the relationship between chemical structure, aggregate structure and optical properties. Our results confirm the three types of aggregate structures (J-, H- and Herringbone) expected from theories on absorption spectra. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 22]