The influence of surface proximity on photoswitching activity of stilbene-functionalized N-heterocyclic carbene monolayers.

Autor: Dery, Shahar, Alshanski, Israel, Mervinetsky, Evgeniy, Feferman, Daniel, Yitzchaik, Shlomo, Hurevich, Mattan, Gross, Elad
Předmět:
Zdroj: Chemical Communications; 6/28/2021, Vol. 57 Issue 51, p6233-6236, 4p
Abstrakt: Self-assembly of photo-responsive molecules is a robust technology for reversibly tuning the properties of functional materials. Herein, we probed the crucial role of surface–adsorbate interactions on the adsorption geometry of stilbene-functionalized N-heterocyclic carbenes (stilbene-NHCs) monolayers and its impact on surface potential. Stilbene-NHCs on Au film accumulated in a vertical orientation that enabled high photoisomerization efficiency and reversible changes in surface potential. Strong metal–adsorbate interactions led to flat-lying adsorption geometry of stilbene-NHCs on Pt film, which quenched the photo-isomerization influence on surface potential. It is identified that photo-induced response can be optimized by positioning the photo-active group in proximity to weakly-interacting surfaces. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index