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Issue 8, 2012
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Photophysics of aminophenyl substituted pyrrolopyrrole cyanines

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Abstract

A series of novel pyrrolopyrrole cyanines (PPCys) bearing various aminophenyl substituents at the diketopyrrolopyrrole (DPP) core are presented. Compared to their alkoxyphenyl substituted analogues, these dyes feature additional intense electronic transitions of charge-transfer character which give detailed insight into the optical properties of PPCys. The energetic mixing of the involved orbitals has pronounced effects on the absorption and fluorescence behavior. Protonation of the amino function suppresses these effects and leads to a pronounced increase in fluorescence quantum yield. The photophysics of the dyes can be rationalized by means of a simple energy scheme.

Graphical abstract: Photophysics of aminophenyl substituted pyrrolopyrrole cyanines

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Publication details

The article was received on 21 Oct 2011, accepted on 22 Dec 2011 and first published on 23 Dec 2011


Article type: Paper
DOI: 10.1039/C2CP23330D
Citation: Phys. Chem. Chem. Phys., 2012,14, 2921-2928

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    Photophysics of aminophenyl substituted pyrrolopyrrole cyanines

    S. Wiktorowski, G. M. Fischer, M. J. Winterhalder, E. Daltrozzo and A. Zumbusch, Phys. Chem. Chem. Phys., 2012, 14, 2921
    DOI: 10.1039/C2CP23330D

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