0000000000512248
AUTHOR
Till J. B. Zähringer
showing 6 related works from this author
Metal‐Free Twofold Electrochemical C−H Amination of Activated Arenes: Application to Medicinally Relevant Precursor Synthesis
2020
Abstract The efficient production of many medicinally or synthetically important starting materials suffers from wasteful or toxic precursors for the synthesis. In particular, the aromatic non‐protected primary amine function represents a versatile synthetic precursor, but its synthesis typically requires toxic oxidizing agents and transition metal catalysts. The twofold electrochemical amination of activated benzene derivatives via Zincke intermediates provides an alternative sustainable strategy for the formation of new C−N bonds of high synthetic value. As a proof of concept, we use our approach to generate a benzoxazinone scaffold that gained attention as a starting structure against ca…
Purely organic Vis-to-UV upconversion with an excited annihilator singlet beyond 4 eV
2022
The conversion of visible light into high-energy UV photons via sensitized triplet–triplet annihilation (TTA-UC) could pave the way for several energy-demanding applications. However, only a handful of annihilator chromophores for Vis-to-UV upconversion are known and the current limit for the excited-state energy of the UV emitter in TTA-UC schemes is below 4 eV, i.e., in the spectral region (>310 nm) where the sun still provides a considerable photon flux. Herein, we present a novel biphenyl-based annihilator with a highly fluorescent singlet state at 4.04 eV. This annihilator can be combined with a widely-used TADF sensitizer to yield an efficient blue-light (2.77 eV) driven upconversion …
CCDC 1998477: Experimental Crystal Structure Determination
2021
Related Article: Lars J. Wesenberg, Erika Diehl, Till J. B. Zähringer, Carolin Dörr, Dieter Schollmeyer, Akihiro Shimizu, Jun‐ichi Yoshida, Ute A. Hellmich, Siegfried R. Waldvogel|2020|Chem.-Eur.J.|26|17574|doi:10.1002/chem.202003852
CCDC 1998478: Experimental Crystal Structure Determination
2021
Related Article: Lars J. Wesenberg, Erika Diehl, Till J. B. Zähringer, Carolin Dörr, Dieter Schollmeyer, Akihiro Shimizu, Jun‐ichi Yoshida, Ute A. Hellmich, Siegfried R. Waldvogel|2020|Chem.-Eur.J.|26|17574|doi:10.1002/chem.202003852
CCDC 1998475: Experimental Crystal Structure Determination
2021
Related Article: Lars J. Wesenberg, Erika Diehl, Till J. B. Zähringer, Carolin Dörr, Dieter Schollmeyer, Akihiro Shimizu, Jun‐ichi Yoshida, Ute A. Hellmich, Siegfried R. Waldvogel|2020|Chem.-Eur.J.|26|17574|doi:10.1002/chem.202003852
CCDC 1998476: Experimental Crystal Structure Determination
2021
Related Article: Lars J. Wesenberg, Erika Diehl, Till J. B. Zähringer, Carolin Dörr, Dieter Schollmeyer, Akihiro Shimizu, Jun‐ichi Yoshida, Ute A. Hellmich, Siegfried R. Waldvogel|2020|Chem.-Eur.J.|26|17574|doi:10.1002/chem.202003852