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Search for "carboxylic acid recognition" in Full Text gives 1 result(s) in Beilstein Journal of Organic Chemistry.

Quinoline based receptor in fluorometric discrimination of carboxylic acids

Kumaresh Ghosh,
Suman Adhikari,
Asoke P. Chattopadhyay and
Purnendu Roy Chowdhury

Beilstein J. Org. Chem. 2008, 4, No. 52, doi:10.3762/bjoc.4.52

value and did not form any excimer upon complexation with the same acids under similar conditions. This established the role of quinoline ring nitrogen in binding with the acids. Keywords: carboxylic acid recognition; excimer emission; naphthalene; quinoline; Introduction The sensing and monitoring of

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Graphical Abstract

Figure 1: Structures of compounds 1 and 2.

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Scheme 1: Syntheses of receptors 1 and 2.

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Figure 2: UV-vis spectra of 1 (c = 5.05 × 10⁻⁵ M) in different solvents.

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Figure 3: UV-vis spectra of 2 (c = 5.05 × 10⁻⁵ M) in different solvents.

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Figure 4: UV spectra of the complex of 1 with citric acid (c = 1.67 × 10⁻⁵ M) and its change of absorbance on...

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Figure 5: UV spectra of the complex of 1 with D-(−)-tartaric acid (c = 1.67 × 10⁻⁵ M) and its change of absor...

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Figure 6: UV spectra of the complex of 2 with citric acid (c = 1.67 × 10⁻⁵ M) and its change of absorbance on...

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Figure 7: UV spectra of the complex of 2 with D-(−)-tartaric acid (c = 1.67 × 10⁻⁵ M) and its change of absor...

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Figure 8: Fluorescence change of 1 in CHCl₃ in the presence of carboxylic acids (λ_ex = 290 nm).

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Figure 9: Plot of the ratio of excimer to monomer emission vs concentration of the complex of 1 with citric a...

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Figure 10: Fluorescence change of 1 in CHCl₃ (c = 1.67 × 10⁻⁵ M) upon addition of citric acid dissolved in CHCl...

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Figure 11: Fluorescence change of 1 in CHCl₃ (c = 1.67 × 10⁻⁵ M) upon addition of D-(−)-tartaric acid dissolve...

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Figure 12: Fluorescence change of 2 in CHCl₃ in the presence of carboxylic acids (λ_ex = 290 nm).

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Figure 13: Fluorescence change of 2 in CHCl₃ (c = 1.67 × 10⁻⁵ M) upon addition citric acid dissolved in CHCl₃ ...

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Figure 14: ¹H NMR (in CDCl₃) spectra of receptor 1 (c = 3.57 × 10⁻³ M; bottom) and the 1:1 complex with citric...

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Figure 15: AM1 optimized geometries of the complexes of 1 with (a) citric acid, hydrogen bond distances: a = 2...

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Figure 16: AM1 optimized geometry of the complex of 2 with citric acid, hydrogen bond distances: a = 2.12 Å, b...

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Published 17 Dec 2008

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