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Solvent-Sensitive Emitting Urea-Bridged bis-BODIPYs: Ready Access by a One-Pot Tandem Staudinger/Aza-Wittig Ureation

AutorCristóbal López, J.; Rio, Mayca del; Oliden, A.; Bañuelos Prieto, Jorge; López-Arbeloa, Íñigo; Garcia-Moreno, I. ; Gómez, A.M.
Fecha de publicación2017
EditorJohn Wiley & Sons
CitaciónChemistry - A European Journal 23: 17511- 17520 (2017)
ResumenHerein we describe the synthesis, and computationally aided photophysical characterization of a new set of urea-bridged bis-BODIPY derivatives. These new dyads are efficiently obtained by a one-pot tandem Staudinger/aza-Wittig ureation protocol, from easily accessible meso-phenyl ortho-azidomethyl BODIPYs. These symmetric bis-BODIPYs outstand by a high absorption probability and excellent fluorescence and laser emission in less polar media. Nevertheless, this emission ability decreases in more polar media, which is ascribed to a light-induced charge-transfer from the urea spacer to the dipyrrin core, a process that can be modulated by appropriate changes in the substitution pattern of the BODIPY core. Furthermore, this ureation protocol can also be employed for the direct conjugation of our BODIPY-azides to amine-containing compounds, thus providing access to fluorescent non-symmetric ureas.
URIhttp://hdl.handle.net/10261/165649
Identificadoresdoi: 10.1002/chem.201703383
issn: 1521-3765
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