An investigation of naphthalenediimides as central building blocks in model compounds for scanning tunneling microscope induced light emission experiments and förster resonance energy transfer studies

Abstract
Scanning tunnelling microscopy (STM) is a powerful technique to observe surfaces at the atomic level. The resolution of this STM technique is good enough to study the electronic properties of single molecules adsorbed onto metallic substrates. An important step towards controllable single molecular technologies is the determination of how the molecule substrate interaction changes the local molecular electronic structure. Since this electronic structure of molecules is strongly perturbed by the electrons of the underlying metallic substrate, an electronic decoupling of the molecules from the metal surface is required to isolate the electronic properties of an individual molecule.
Förster resonance energy transfer (FRET) has found many applications in different fields of science, because it allows the determination of the distance between two chromophores in the 1 10 nm range. In addition to other factors, this energy transfer is also dependent on the relative orientation of donor and acceptor chromophores to each other.
This thesis describes the design, synthesis and investigations of model compounds for:
1). STM induced light emission experiments from single molecules and
2). for FRET studies.