Abstract
π-π Intermolecular interactions among adjacent conjugated azobenzenes chemisorbed on (non-)flat Au surfaces can be tuned by varying the curvature of the Au nanoparticles. Here we show that such interactions rule the thermal cis-trans isomerization kinetics, towards a better control on the azobenzene bistability for its optimal integration as a responsive material.
Highlights
Au nanoparticle scaffolds modulating intermolecular interactions among the conjugated azobenzenes chemisorbed on curved surfaces: tuning the kinetics of cis–trans isomerisation†
In order to gain a direct insight into the role of intermolecular interactions, in particular among the first nearest neighbour molecules, in the trans–cis isomerisation, we have chosen a thiolated azobenzene derivative (AZO) able to form tightly packed self-assembled monolayers (SAMs) on planar[6] and non-planar[7] Au surfaces
We demonstrate that the AuNP scaffold can be used to regulate the kinetics of cis to trans isomerization in a fully conjugated azobenzene derivative forming a tightly packed chemisorbed SAM on its surface
Summary
Au nanoparticle scaffolds modulating intermolecular interactions among the conjugated azobenzenes chemisorbed on curved surfaces: tuning the kinetics of cis–trans isomerisation†. We show that the kinetics of the back cis to trans isomerization in azobenzene chemisorbed on Au nanoparticles with different sizes depends on the interactions between individual adjacent molecules in the condensed phase of a SAM which can be tuned by modifying the size of the Au nanoparticle acting as a structural scaffold.
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