Synthesis, X‐ray Crystal Structures, and Solid‐State Fluorescence Properties of 5,5‐Dialkyl‐9‐dibutylamino‐5H‐benzo[b]naphtho[1,2‐d]furan‐6‐one and 3,3‐Dialkyl‐9‐dibutylamino‐3H‐benzo[kl]xanthen‐2‐one

Abstract

Heterocyclic fluorophores 5,5-dibutyl-9-dibutylamino-5H-benzo [b]naphtho[1,2-d]furan-6-one (4) and 3,3-dibutyl-9-dibutylamino-3H-benzo[kl]xanthen-2-one (7) with dialkyl substituents linked in a nonconjugated fashion to the chromophore skeleton have been derived from quinol-type compounds 1 and 2, and their photophysical properties were investigated in solution and in the solid state. Fluorophores 4 and 7 exhibit strong fluorescence intensity in the solid-state relative to that of quinols 1 and 2; however, 1 and 4 or 2 and 7 exhibit similar fluorescence intensities in solution. To elucidate the dramatic effect of the dialkyl substituent on the solid-state fluorescence excitation and emission spectra, we

Solid-State Emissive BODIPY Dyes with Bulky Substituents As Spacers

“…Emissive solids are highly in demand for various applications, including photoelectric conversion and LED (OLED) applications. However, organic compounds with emissions in the solid state are rare.…”