Azaphthalocyanines: Red Fluorescent Probes for Cations

Light up a red crown: Chelation of sodium and potassium cations by aza[15]crown‐5 switches on strong red fluorescence in azaphthalocyanines. This is due to an inhibition of ultrafast intramolecular charge transfer by coordination of the cations to the donor center. Sodium cations fit well into a cav...

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Bibliographic Details
Published in:Chemistry : a European journal 2013-04, Vol.19 (16), p.5025-5028
Main Authors: Novakova, Veronika, Lochman, Lukáš, Zajícová, Ivana, Kopecky, Kamil, Miletin, Miroslav, Lang, Kamil, Kirakci, Kaplan, Zimcik, Petr
Format: Article
Language:English
Subjects:
Aza Compounds - chemistry
Cations
Chelation
Chemistry
crown compounds
Fluorescence
Fluorescent Dyes - chemistry
fluorescent probes
Holes
Indoles - chemistry
Molecular Structure
phthalocyanines
Potassium
Potassium - chemistry
Sodium
Sodium - chemistry
Stoichiometry
Switches
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Summary:Light up a red crown: Chelation of sodium and potassium cations by aza[15]crown‐5 switches on strong red fluorescence in azaphthalocyanines. This is due to an inhibition of ultrafast intramolecular charge transfer by coordination of the cations to the donor center. Sodium cations fit well into a cavity of the recognition moiety, while potassium forms supramolecular assemblies of azaphthalocyanines with 1:2 stoichiometry.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201300079