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Sulfur Tuning of [1,3]‐Dioxolo[4.5‐ f ]benzodioxole (DBD) Fluorescent Dyes
Author(s) -
Wessig Pablo,
John Leonard,
Sperlich Eric,
Kelling Alexandra
Publication year - 2021
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.202001418
Subject(s) - chemistry , sulfur , fluorescence , photochemistry , biomolecule , absorption (acoustics) , quantum efficiency , oxygen atom , molecule , organic chemistry , optoelectronics , optics , biochemistry , physics
The replacement of oxygen by sulfur atoms of [1,3]‐dioxolo[4.5‐ f ]benzodioxole (DBD) fluorescent dyes is an efficient way to adjust the photophysical properties (sulfur tuning). While previously developed S 4 ‐DBD dyes exhibit considerably red‐shifted absorption and emission wavelength, the heavy atom effect of four sulfur atoms cause low fluorescence quantum yields and short fluorescence lifetimes. Herein, we demonstrate that the replacement of less than four sulfur atoms (S 1 ‐DBD, 1,2‐S 2 ‐DBD, and 1,4‐S 2 ‐DBD dyes) permits a fine‐tuning of the photophysical properties. In some cases, a similar influence on the wavelength without the detrimental effect on the quantum yields and lifetimes is observed. Furthermore, the synthetic accessibility of S 1 ‐ and S 2 ‐DBD dyes is improved, compared with S 4 ‐DBD dyes. For coupling with biomolecules a series of reactive derivatives of the new dyes were developed (azides, OSu esters, alkynes, maleimides).