We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
A Rational Design of Electrochemically and Photophysically Tunable Triarylamine Luminophores by Consecutive (Pseudo‐)Four‐Component Syntheses.
- Authors
Kohlbecher, Regina; Müller, Thomas J. J.
- Abstract
The concatenation of Suzuki coupling and two‐fold Buchwald‐Hartwig amination in sequentially palladium‐catalyzed consecutive multicomponent syntheses paves a concise, convergent route to diversely functionalized para‐biaryl‐substituted triarylamines (p‐bTAAs) from simple, readily available starting materials. An extensive library of p‐bTAAs permits comprehensive investigations of their electronic properties by absorption and emission spectroscopy, cyclic voltammetry, and quantum chemical calculations, which contribute to a deep understanding of their electronic structure. The synthesized p‐bTAAs exhibit tunable fluorescence from blue to yellow upon photonic excitation with quantum yields up to 98 % in solution and 92 % in the solid state. Furthermore, a pronounced bathochromic shift of the emission maxima by increasing solvent polarity indicates positive emission solvatochromism. Aggregation‐induced enhanced emission (AIEE) in dimethyl sulfoxide (DMSO)/water mixtures causes the formation of intensely blue fluorescent aggregates. Cyclic voltammetry shows reversible first and second oxidations of p‐bTAAs at low potentials, which are tunable by variation of the introduced para substituents. 3D Hammett plots resulting from the correlation of oxidation potentials and emission maxima with electronic substituent parameters emphasize the rational design of tailored p‐bTAAs with predictable electrochemical and photophysical properties.
- Subjects
LUMINOPHORES; SUZUKI reaction; CYCLIC voltammetry; EMISSION spectroscopy; ELECTRONIC structure; DIMETHYL sulfoxide
- Publication
Chemistry - A European Journal, 2024, Vol 30, Issue 17, p1
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202304119