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• W2140069172 endingPage "186" @default.
• W2140069172 startingPage "177" @default.
• W2140069172 abstract "Abstract The photophysical properties of a prototypic donor–acceptor dyad, featuring a conventional boron dipyrromethene (Bodipy) dye linked to a dicyanovinyl unit through a meso ‐phenylene ring, have been recorded in weakly polar solvents. The absorption spectrum remains unperturbed relative to that of the parent Bodipy dye but the fluorescence is extensively quenched. At room temperature, the emission spectrum comprises roughly equal contributions from the regular π, π* excited‐singlet state and from an exciplex formed by partial charge transfer from Bodipy to the dicyanovinyl residue. This mixture moves progressively in favor of the locally excited π, π* state on cooling and the exciplex is no longer seen in frozen media; the overall emission quantum yield changes dramatically near the freezing point of the solvent. The exciplex, which has a lifetime of approximately 1 ns at room temperature, can also be seen by transient absorption spectroscopy, in which it decays to form the locally excited triplet state. Under applied pressure ( P <170 MPa), formation of the exciplex is somewhat hindered by restricted rotation around the semirigid linkage and again the emission profile shifts in favor of the π, π* excited state. At higher pressure (170< P <550 MPa), the molecule undergoes reversible distortion that has a small effect on the yield of π, π* emission but severely quenches exciplex fluorescence. In the limiting case, this high‐pressure effect decreases the molar volume of the solute by approximately 25 cm 3 and opens a new channel for nonradiative deactivation of the excited‐state manifold." @default.
• W2140069172 created "2016-06-24" @default.
• W2140069172 creator A5001830404 @default.
• W2140069172 creator A5012851455 @default.
• W2140069172 creator A5038705766 @default.
• W2140069172 creator A5047552946 @default.
• W2140069172 creator A5057806321 @default.
• W2140069172 date "2013-12-20" @default.
• W2140069172 modified "2023-10-12" @default.
• W2140069172 title "Exciplex Emission from a Boron Dipyrromethene (Bodipy) Dye Equipped with a Dicyanovinyl Appendage" @default.
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• W2140069172 doi "https://doi.org/10.1002/cphc.201300805" @default.
• W2140069172 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24376111" @default.
• W2140069172 hasPublicationYear "2013" @default.
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