Functionalized cationic [4]helicenes with unique tuning of absorption, fluorescence and chiroptical properties up to the far-red range

Authors

I. Hernández Delgado, University of Geneva
S. Pascal, University of Geneva
A. Wallabregue, University of Geneva
R. Duwald, University of Geneva
C. Besnard, University of Geneva
L. Guénée, University of Geneva
C. Nançoz, University of Geneva
E. Vauthey, University of Geneva
R. Tovar, San Jose State University
J. Lunkley, San Jose State University
Gilles Muller, San Jose State University
J. Lacour, University of Geneva

Document Type

Article

Publication Date

January 2016

Publication Title

Chemical Science

Volume

7

Issue Number

7

First Page

4685

Last Page

4693

DOI

10.1039/C6SC00614K

Disciplines

Chemistry

Abstract

Unprecedented regioselective post-functionalization of racemic and enantiopure cationic diaza [4]helicenes is afforded. The peripheral auxochrome substituents allow a general tuning of the electrochemical, photophysical and chiroptical properties of the helical dyes (26 examples). For instance, electronic absorption and circular dichroism are modulated from the orange to near-infrared spectral range (575–750 nm), fluorescence quantum efficiency is enhanced up to 0.55 (631 nm) and circularly polarized luminescence is recorded in the red (|glum| ∼ 10−3).

Comments

This article was originally published in Chemical Science, 7, 7, 2016. It can be found online at this link.

Recommended Citation

I. Hernández Delgado, S. Pascal, A. Wallabregue, R. Duwald, C. Besnard, L. Guénée, C. Nançoz, E. Vauthey, R. Tovar, J. Lunkley, Gilles Muller, and J. Lacour. "Functionalized cationic [4]helicenes with unique tuning of absorption, fluorescence and chiroptical properties up to the far-red range" Chemical Science (2016): 4685-4693. https://doi.org/10.1039/C6SC00614K