Issue 47, 2020

General strategy for tuning the Stokes shifts of near infrared cyanine dyes

Abstract

We report a significant Stokes shift enhancement in near-infrared fluorescing cyanines as a result of C4′-substitution with cyclic or acyclic amines. Based on a combined experimental and density functional study, a simple strategy for optimizing the Stokes shift is proposed. By tuning the relative energies of cyanine-like and bis-dipolar conformers, differing in the rotational angle of the amine substituent, it is possible to develop molecules that undergo conformational change upon excitation, resulting in a predictable Stokes shift.

Graphical abstract: General strategy for tuning the Stokes shifts of near infrared cyanine dyes

Supplementary files

Article information

Article type
Paper
Submitted
30 iyl 2020
Accepted
25 sen 2020
First published
05 okt 2020

J. Mater. Chem. C, 2020,8, 16769-16773

Author version available

General strategy for tuning the Stokes shifts of near infrared cyanine dyes

J. Zhang, M. Moemeni, C. Yang, F. Liang, W. Peng, B. G. Levine, R. R. Lunt and B. Borhan, J. Mater. Chem. C, 2020, 8, 16769 DOI: 10.1039/D0TC03615C

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