4.6 Article

Color-Tunable Multifunctional Excited-State Intramolecular Proton Transfer Emitter: Stimulated Emission of a Single Dye

Journal

CHEMISTRY-A EUROPEAN JOURNAL
Volume 28, Issue 44, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202201327

Keywords

deprotonation; laser chemistry; photochemistry; proton transfer; stimulated emission

Funding

  1. National Science Centre, Poland [2018/31/B/ST8/02832]
  2. CNRS
  3. ANR

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Excited-state intramolecular proton transfer chromophores are considered good materials for laser generation due to their four-level photocycle. By rational engineering, it is possible to fabricate tunable lasers with dual fluorescence emission and the potential for white light generation.
The excited-state intramolecular proton transfer chromophores were regarded as good materials for laser action generation due to their inherent four-level photocycle. The excitation-dependent properties of these compounds enable light amplification from two distinct forms: both enol and keto, making it possible to obtain dual fluorescence emission. Herein, we report that a third option is possible for the first time stimulated emission was realized with a deprotonated ESIPT molecule based on a novel rigidified 2-(2'-hydroxyphenyl)benzothiazole derivative, triggering the possibility to fabricate real-time tunable active material. Through the rational engineering of the ratio of each emissive species, a red-green-blue device was fabricated with the possibility of white light generation. The degenerated two-wave mixing setup was applied to construct a continuously tunable distributed feedback laser.

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