"Functionalized cationic [4]helicenes with unique tuning of absorption, fluorescence and chiroptical properties up to the far-red range" by I. Hernández Delgado

Article

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

Chemical Science (2016)

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. C. Tovar, San Jose State University
J. L. Lunkley, San Jose State University
Gilles Muller, San Jose State University
J. Lacour, University of Geneva

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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).

Disciplines

Chemistry

Publication Date

2016

DOI

10.1039/C6SC00614K

Publisher Statement

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

Citation Information

I. Hernández Delgado, S. Pascal, A. Wallabregue, R. Duwald, et al.. "Functionalized cationic [4]helicenes with unique tuning of absorption, fluorescence and chiroptical properties up to the far-red range" Chemical Science Vol. 7 Iss. 7 (2016) p. 4685 - 4693
Available at: http://works.bepress.com/gilles_muller/59/