Work

Boramidine: a boron-based photoacidic fluorophore

Year: 2025

Type: article

Abstract: Boramidine is a small water-soluble organic fluorophore that was recently introduced as a versatile building block of fluorescent probes. Herein, we show that boramidine is protonated in highly protic solvents. This behaviour explains the surprisingly large difference in the absorption spectrum reported previously when going from an organic to an aqueous environment. Transient absorption measurements reveal that the invariance of the fluorescence spectrum to the environment arises from an excited-state proton transfer to the solvent occurring a few ps after photoexcitation of the protonated boramidine. This photoacidity of boramidine is a further add-on to the polyvalence of this fluorophore.

Source: Chemical Communications

DOI: 10.1039/d5cc02043c

Authors: Estefanía Sucre-Rosales, Nidal Saleh, Jerôme Lacour, Eric Vauthey

Institution: University of Geneva

Language: English

Topic: Photochemistry and Electron Transfer Studies

Subfield: Physical and Theoretical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Funder: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

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