Search results for "molecular switches"
showing 3 items of 3 documents
Tuning Azoheteroarene Photoswitch Performance through Heteroaryl Design
2017
International audience; Photoswitchable compounds, which can be reversibly switched between two isomers by light, continue to attract significant attention for a wide array of applications. Azoheteroarenes represent a relatively new but understudied type of photoswitch, where one of the aryl rings from the conventional azobenzene class has been replaced with a five-membered heteroaromatic ring. Initial studies have suggested the azoheteroarenes – the arylazopyrazoles in particular – to have excellent photoswitching properties (quantitative switching and long Z isomer half-life). Here we present a systematic computational and experimental study to elucidate the origin of the long thermal hal…
Chemical design of coordination polymers and functional materials: from pore control in MOFs through spin dynamics in nanomagnets to rotaxanes in mol…
2022
El trabajo de esta tesis se enmarca en el diseño químico de polímeros de coordinación y de materiales funcionales para poder ser utilizados en el campo de los materiales moleculares. El capítulo 1 ofrece una visión de los avances más significativos en la química de coordinación, así como una introducción general de los materiales moleculares más relevantes en la actualidad. El objetivo es proporcionar al lector el conocimiento necesario para establecer las bases sobre los campos a tratar. El resto de capítulos está organizado de acuerdo con un aumento de la dimensionalidad, empezando con moléculas discretas y terminando con polímeros de coordinación. El capítulo dos describe dos estructuras…
Design, Synthesis and Characterization of a Visible-Light-Sensitive Molecular Switch and Its PEGylation Towards a Self-Assembling Molecule.
2022
HBDI-like chromophores represent a novel set of biomimetic switches mimicking the fluorophore of the green fluorescent protein that are currently studied with the hope to expand the molecular switch/motor toolbox. However, until now members capable of absorbing visible light in their neutral (i. e. non-anionic) form have not been reported. In this contribution we report the preparation of an HBDI-like chromophore based on a 3-phenylbenzofulvene scaffold capable of absorbing blue light and photoisomerizing on the picosecond timescale. More specifically, we show that double-bond photoisomerization occurs in both the E-to-Z and Z-to-E directions and that these can be controlled by irradiating …