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Cover Picture: OFF‐ON‐OFF Red‐Emitting Fluorescent Indicators for a Narrow pH Window (Chem. Eur. J. 8/2017)
Author(s) -
Cidlina Antonin,
Miletin Miroslav,
FathiRasekh Mahtab,
Nemykin Victor N.,
Zimcik Petr,
Novakova Veronika
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201605516
Subject(s) - protonation , fluorescence , intramolecular force , chemistry , molecule , amine gas treating , charge (physics) , tertiary amine , nitrogen , photochemistry , crystallography , stereochemistry , ion , organic chemistry , physics , quantum mechanics
Two switches are shown to control the fluorescence in an efficient red‐emitting fluorescent indicator with a steep sensing profile. Intramolecular charge transfer from the peripheral tertiary amine and protonation of azomethine nitrogen atoms in azaphthalocyanine are involved in the sensing mechanism. The particular pH range is driven by the basicity of these two centers and can be simply tuned by structural changes in the molecule. More information can be found in the Full Paper by V. Nemykin, P. Zimcik, V. Novakova et al. on page 1795 ff.