New Methods for the Synthesis of Highly Fluorescently Substituted Heterocyclic Boranils: Structural Identification and Photophysical Properties
Soumaya Agren, Jamal El Haskouri, Emmanuel Beyou, Mohamed Hassen V. Baouab
Abstract
ABSTRACT We report the synthesis, structural, thermal, and photophysical properties of six boranils ((A‐F)‐BF2). Compounds (A‐C)‐BF2 were synthesized at low temperature, while nitro and pyridine derivatives were obtained at 80°C with yields up to 66%. Tert‐butyl and chloro‐substituted boranils showed thermal stability up to 300 °C. All boranils were fluorescent, with properties tuned by phenyl substitution and boron difluoride complexation. The lowest energetic gap (2.210 eV) was found in (D‐BF2), which exhibited a remarkable red‐shift in absorption and emission due to charge transfer between donor and acceptor groups. This work is part of ongoing studies on metal cation detection and photocatalysis.