Time filter

Source Type

Mirloup A.,Laboratoire Of Chimie Organique Et Spectroscopie Avancees | Retailleau P.,CNRS Natural Product Chemistry Institute | Ziessel R.,Laboratoire Of Chimie Organique Et Spectroscopie Avancees
Tetrahedron Letters | Year: 2013

The synthesis of photoactive arrays consisting of Bodipy scaffoldings is described. The synthetic strategy involved first the construction of functionalised modules, then the use of specific Knoevenagel reactions. Boron-protection is required to avoid self-condensation. Comparison of thienylBodipy dyes with their phenyl analogues showed them to be both less chemically stable and more weakly fluorescent. In the multichromophoric species, efficient cascade energy transfer occurs upon absorption in the highest energy unit. The redox activity of the mixed dyes is analysed in terms of the behaviour of specific reference compounds. © 2013 Elsevier Ltd. All rights reserved.


Harriman A.,Northumbria University | Alamiry M.A.H.,Northumbria University | Hagon J.P.,Northumbria University | Hablot D.,Laboratoire Of Chimie Organique Et Spectroscopie Avancees | Ziessel R.,Laboratoire Of Chimie Organique Et Spectroscopie Avancees
Angewandte Chemie - International Edition | Year: 2013

Energy transfer: For large electronic systems in close proximity it is shown that the coulombic mechanism accounts for the rates of electronic energy transfer for both linear and perpendicular geometries across distances from 36 to 16 Å. Replacing the ideal dipole approximation with either a revised extended dipole or atom-localized charges improves agreement between theory and experiment. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Frath D.,Laboratoire Of Chimie Organique Et Spectroscopie Avancees | Massue J.,Laboratoire Of Chimie Organique Et Spectroscopie Avancees | Ulrich G.,Laboratoire Of Chimie Organique Et Spectroscopie Avancees | Ziessel R.,Laboratoire Of Chimie Organique Et Spectroscopie Avancees
Angewandte Chemie - International Edition | Year: 2014

Multidisciplinary research on novel organic luminescent dyes is propelled by potential applications in plastic electronics and biomedical sciences. The construction of sophisticated fluorescent dyes around a tetrahedral boron(III) center is a particular approach that has fueled the creativity of chemists. Success in this enterprise has been readily achieved with simple synthetic protocols, the products of which display unusual spectroscopic behavior. This account is a critical review of recent advances in the field of boron(III) complexes (excluding BODIPYs and acetylacetonate boron complexes) involving species displaying similar coordination features, and we outline their potential development in several disciplines. Dye by boron: N,N or N,O complexes of boron(III) are easy to prepare and handle, and they display outstanding fluorescence properties in both solution and the solid state. These novel dyes were classified by the number of atoms in the ring systems and by the number of aromatic rings participating in the π conjugation. The optical properties are discussed, and various applications in light-emitting devices as well as probes are anticipated. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Loading Laboratoire Of Chimie Organique Et Spectroscopie Avancees collaborators
Loading Laboratoire Of Chimie Organique Et Spectroscopie Avancees collaborators