Carbazole- and Fluorene-Fused Aza-BODIPYs: NIR Fluorophores with High Brightness and Photostability.

ABSTRACT: Three new aza-BODIPY dyes incorporating fused fluorene or carbazole moieties have been prepared. The dyes show significant enhancement of photophysical properties compared to the parent 1,3,5,7-tetraphenyl aza-BODIPY (TPAB): a bathochromic shift of the absorption maximum (up to 2700 cm^-1 ) and emission maximum (up to 2270 cm^-1 ); an almost threefold increase in molar absorption coefficients (to ca. 230 000 M^-1  cm^-1 ) and a significant increase in the fluorescence quantum yield to 49-66 %. Owing to the combination of these properties, the new aza-BODIPY dyes belong to the brightest NIR dyes reported. The dyes also show excellent photostability. Due to their outstanding properties, the new dyes represent a promising platform for further exploratio

SUBMITTER: Rappitsch T 

PROVIDER: S-EPMC8362076 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature