title: Single Heteroatom Fine-Tuning of the Emissive Properties in Organoboron Complexes with 7-(Azaheteroaryl)indole Systems.
abstract: The application of organoboron compounds as light-absorbing or light-emitting species in areas as relevant as organic electronics or biomedicine has motivated the search for new materials which contribute to the progress of those applications. This article reports the synthesis of four-coordinate boron complexes based on the unexplored 7-(azaheteroaryl)indole ligands. An easy synthetic approach has enabled the fine-tuning of the electronic structure of the organoboron species by modifying a heteroaromatic component in the conjugated system. Furthermore, a comprehensive characterization by X-ray diffraction, absorption and emission spectroscopy, both in solution and in the solid state, cyclic voltammetry, and computational methods has evidenced the utility of this simple strategy. Large Stokes shifts have been achieved in solid thin-films which show a range of emitted light from blue to orange. The synthesized compounds have been used as biocompatible fluorophores in cell bioimaging.
authors.affiliation: Department of Organic Chemistry, Faculty of Chemistry, University of Murcia , Campus of Espinardo, Murcia 30100, Spain.
authors.forename: Miriam
authors.initials: M
authors.lastname: Más-Montoya
authors.affiliation: Department of Organic Chemistry, Faculty of Chemistry, University of Murcia , Campus of Espinardo, Murcia 30100, Spain.
authors.forename: Laura
authors.initials: L
authors.lastname: Usea
authors.affiliation: Department of Organic Chemistry, Faculty of Chemistry, University of Murcia , Campus of Espinardo, Murcia 30100, Spain.
authors.forename: Arturo
authors.initials: A
authors.lastname: Espinosa Ferao
authors.affiliation: Department of Biochemistry and Molecular Biology A, School of Biology, University of Murcia , Campus of Espinardo, Murcia 30100, Spain.
authors.forename: María F
authors.initials: MF
authors.lastname: Montenegro
authors.affiliation: Department of Organic Chemistry, Faculty of Pharmacy, University of Valencia , c/Vicente Andrés Estelles s/n, Burjassot 46100, Spain.
authors.forename: Carmen
authors.initials: C
authors.lastname: Ramírez de Arellano
authors.affiliation: Department of Organic Chemistry, Faculty of Chemistry, University of Murcia , Campus of Espinardo, Murcia 30100, Spain.
authors.forename: Alberto
authors.initials: A
authors.lastname: Tárraga
authors.affiliation: Department of Biochemistry and Molecular Biology A, School of Biology, University of Murcia , Campus of Espinardo, Murcia 30100, Spain.
authors.forename: José N
authors.initials: JN
authors.lastname: Rodríguez-López
authors.affiliation: Department of Organic Chemistry, Faculty of Chemistry, University of Murcia , Campus of Espinardo, Murcia 30100, Spain.
authors.forename: David
authors.initials: D
authors.lastname: Curiel