Facile modification of phosphole-based aggregation-induced emission luminogens with sulfonyl isocyanates† † Electronic supplementary information (ESI) available: Methods, synthesis, crystallographic data, compound spectra, optical properties and theoretical calculations. CCDC 2219165–2219173. For ESI and crystallographic data in CIF or other electronic format see DOI: https://doi.org/10.1039/d3sc00308f

ABSTRACT: Phosphole oxides undergo a highly chemoselective reaction with sulfonyl isocyanates forming sulfonylimino phospholes in high yields. This facile modification proved to be a powerful tool for obtaining new phosphole-based aggregation-induced emission (AIE) luminogens with high fluorescence quantum yields in the solid state. Changing the chemical environment of the phosphorus atom of the phosphole framework results in a significant shift of the fluorescence maximum to longer wavelengths. In this work, we present a powerful synthetic strategy for selectively converting phosphole oxides by reaction with sulfonyl isocyanates into the corresponding sulfonylimino phospholes, which show a decrease or increase in solid-state emission.

SUBMITTER: Konig N 

PROVIDER: S-EPMC9977459 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature