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              <p>Constructing sophisticated luminescent dyes around a tetrahedral boron(III) center is a particular approach that has fueled the creativity of chemists motivated by their use in organic electronics and applied photonics or as molecular probes in biomedical analysis, sensors and materials science. Among these dyes, Boranils have attracted particular interest over the past decade with potential application for energy transfer, protein labeling, or NLO imaging. More recently, these dyes have been used to trigger photoinduced electron transfer to viologen-based acceptors (4,4'-bipyridinium salts). This strategy has proven effective in controlling conformational changes at the molecular level or the degree of organization of gel-forming supramolecular assemblies. We are also working on developing switchable materials for circularly polarized luminescence (CPL). Preliminary results on new chiroptical fluorophores based on Boranils will be described. We plan to use these new structures to develop bistable CPL-active metamorphic materials for which stimulation changes the organization of supramolecular self-assembled monolayers on surfaces.</p>
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