Nonlinear optical response of photochromic azobenzene-functionalized self-assembled monolayers

Structure and excitonic coupling in self-assembled monolayers of azobenzene-functionalized alkanethiols.

Optical properties and the geometric structure of self-assembled monolayers of azobenzene-functionalized alkanethiols have been investigated by UV/visible and near edge X-ray absorption fine structure spectroscopy in combination with density-functional theory. By attaching a trifluoro-methyl end group to the chromophore both the molecular tilt and twist angle of the azobenzene moiety are access...

Localized surface plasmon resonance investigations of photoswitching in azobenzene-functionalized self-assembled monolayers on Au.

Localized plasmon resonance (LSPR) spectroscopy, employing gold nanodisk substrates, is applied for studies of photoswitching in self-assembled monolayers of azobenzene-containing thiols. By choosing customized samples in which the sharp LSPR resonance is well separated from the spectral regime of the molecular absorption bands, the photoisomerization kinetics of the adlayer can be monitored in...

Self-Assembled Monolayers of Azobenzene-Incorporated Alkanethiol on Silver

In the past decade, self-assembled monolayers (SAMs) have received a great deal of attention for their fundamental importance in understanding interfacial properties as well as for their potential applications in molecular technologies. SAMs have been used in the design of various interfaces for chemical sensors, nonlinear optical materials, optical switches, and high density memory devices. Th...

Ultrafast Dynamics in Quasi-One-Dimensional Organic Molecular Crystals Self-Assembled Monolayers of Photochromic Molecules

Self-assembled solvato-morphologically controlled photochromic crystals.

Here we describe, for the first time, intriguing solvato-morphological control of spiropyran-based microcrystalline structures. These microstructures exhibit reversible photoisomerization upon light irradiation (UV/Vis) in the solid-state. Finally, light-guided aggregation of these microstructures at the liquid/air interface is also demonstrated.