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Journal articles
Photoactive Boron-Nitrogen-Carbon Hybrids: From Azo-borazines to Polymeric Materials
Abstract : In this paper, we describe synthetic routes for preparing a novel switchable BNC-based chromophore, composed of a borazine core peripherally functionalized with azobenzene moieties. Capitalizing on the Pd-catalyzed Suzuki cross-coupling reaction between a tris-triflate borazine and an organoboron azobenzene derivative, a photoswtichable azo-borazine derivative was successfully prepared. The molecule showed reversible E/Z photoisomerization upon irradiation at the maximum of the intense π–π* absorption feature (360 nm). X-ray crystallographic investigations revealed a nonplanar orientation of the three azobenzene moieties and the trans configuration of the −N═N– bonds. Building on the synthetic versatility of the borazine-azobenzene derivative, we used this photoactive scaffold to engineer soluble BN-doped polythiophene polymers. Photophysical characterization performed in solvents of different polarity suggested that the polymer undergoes intramolecular charge transfer (ICT).
Cited literature [78 references]
https://hal-univ-rennes1.archives-ouvertes.fr/hal-02278423
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Friday, October 18, 2019 - 3:48:56 PM
Last modification on : Wednesday, April 7, 2021 - 3:18:12 PM
Long-term archiving on: : Sunday, January 19, 2020 - 3:26:27 PM
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Friday, October 18, 2019 - 3:48:56 PM
Last modification on : Wednesday, April 7, 2021 - 3:18:12 PM
Long-term archiving on: : Sunday, January 19, 2020 - 3:26:27 PM
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