Excitation-Wavelength-Dependent Photophysics of a Torsionally Disordered Push–Pull Dye DOI
Ina Fureraj, Johannes Wega, Evangelos Balanikas

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(31), P. 7857 - 7862

Published: July 25, 2024

The torsional disorder of conjugated dyes in the electronic ground state can lead to inhomogeneous broadening S1 ←S0 absorption band, allowing for selective photoexcitation molecules with different amounts distortion. Here, we investigate how this affects transitions upper excited states. We show that torsion a core-alkynylated push–pull dye have opposite effects on oscillator strength its lowest-energy transitions. Consequently, photoselection planar and twisted be achieved by exciting distinct bands. Whereas has limited effect liquids due fast planarization molecules, it strongly overall photophysics polymeric environment, where motion is hindered, fluorescence quantum yields intersystem-crossing dynamics.

Language: Английский

Iridium-Catalyzed Asymmetric Allylic Substitution with Sequential Boron Incorporation DOI

Wan-Yi Xu,

Lihong Zhang, Le Wang

et al.

Organic Letters, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

An iridium-catalyzed asymmetric allylic substitution with sequential boron incorporation is reported. The reaction accommodates a wide range of substrates, affording chiral N,O-bidentate difluoroboron complexes in excellent yields high enantioselectivities. Furthermore, decigram-scale reaction, synthetic transformations, as well photophysical property investigations the are explored.

Language: Английский

Citations

0
Excitation-Wavelength-Dependent Photophysics of a Torsionally Disordered Push–Pull Dye DOI
Ina Fureraj, Johannes Wega, Evangelos Balanikas

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(31), P. 7857 - 7862

Published: July 25, 2024

The torsional disorder of conjugated dyes in the electronic ground state can lead to inhomogeneous broadening S1 ←S0 absorption band, allowing for selective photoexcitation molecules with different amounts distortion. Here, we investigate how this affects transitions upper excited states. We show that torsion a core-alkynylated push–pull dye have opposite effects on oscillator strength its lowest-energy transitions. Consequently, photoselection planar and twisted be achieved by exciting distinct bands. Whereas has limited effect liquids due fast planarization molecules, it strongly overall photophysics polymeric environment, where motion is hindered, fluorescence quantum yields intersystem-crossing dynamics.

Language: Английский

Citations

3