Tuning the Photophysical Properties of Push‐Pull Azaheterocyclic Chromophores by Protonation: A Brief Overview of a French‐Spanish‐Czech Project. Issue 5 (22nd October 2019)

• Record Type: Journal Article
• Authors: Achelle, Sylvain; Rodríguez‐López, Julián; Bureš, Filip; Robin‐le Guen, Françoise
• Is Part Of: Chemical record. Volume 20:Issue 5(2020)
• Page Start: 440
• Page End: 451
• Publication Date: 2019-10-22
• Subjects: white-light emission -- push-pull chromophores -- nitrogen heterocycles -- protonation -- photoluminescence.; Chemistry -- Periodicals; 540
• DOI: 10.1002/tcr.201900064
• Languages: English
• ISSNs: 1527-8999

Abstract

Abstract: Conjugated push‐pull molecules that incorporate nitrogen heterocycles as electron‐withdrawing units are interesting materials because of their luminescence properties. These chromophores can be easily and reversibly protonated at the nitrogen atom of the heterocyclic ring and this can cause dramatic color changes. White and multi‐color photoluminescence both in solution and in the solid state can be obtained by an accurate control of the amount of acid. Thus, with a suitable design these compounds have potential applications in the development of colorimetric pH sensors and the fabrication of OLEDs based on only one material. We provide here a brief overview of our collaborative efforts made in this area. Abstract : An account is provided of our studies on the effect that the addition of acid has on the photophysical properties of π‐extended push‐pull chromophores that incorporate azaheterocyclic rings as electron‐withdrawing moieties. The work carried out to afford white light‐emitting materials based on an equilibrium between neutral and protonated forms that emit complementary colors is described.