Collaborative Research Center (SFB) 677 - Function by Switching

B08: Spectroscopic Investigation of the Switching of Azobenzene-based Monolayers on Gold and SiO2 (2011 - 2015)


The efficiency of light-driven molecular switches in self-assembled monolayers on surfaces depends on the substrate and on the local environment of the functional units. The influence of the surfaces and the resulting photochemical dynamics are studied in selected model systems using complementary submonolayer-sensitive, structure-specific, and femtosecond time-resolved optical spectroscopies (SFG, SHG, fs-absorption and fluorescence). Comparisons of chemically related systems on extended surfaces and on nanoparticles allow for a separation of the effects of, e.g., sterical hindrance, competing energy transfer processes, the 2D phase stability, and the solvent.

Project Graphical Abstract