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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’-substiution 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.

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Article information


Submitted
30 Jul 2020
Accepted
25 Sep 2020
First published
05 Oct 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

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. Lunt and B. Borhan, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/D0TC03615C

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