Tuning the Photophysical Properties of Aza‐BODIPYs in the Near‐Infrared Region by Introducing Electron‐Donating Thiophene Substituents
Résumé
This study presents the synthesis, the spectroscopic and electrochemical properties of new bis- and tetra- substituted azaboron-dipyrromethene (aza-BODIPY) dyes sub- stituted by different electron donating groups connected to the aza-BODIPY core through a thiophene unit. In line with theoretical calculations, experimental measurements point out the positive impact of the thiophene group that behave as a secondary donor group leading to an enhancement of the intramolecular charge transfer process in comparison to previously reported aza-BODIPY dyes. This heterocycle has also been found to tune the oxidative potential and to stabilize the electro-generated species.
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