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1 article(s) from Yeung, Chi-Chung

Ratiometric fluorescent probe for enantioselective detection of D-cysteine in aqueous solution

Xiao-bo Zhou,
Wing-Hong Chan,
Albert W. M. Lee and
Chi-Chung Yeung

Beilstein J. Org. Chem. 2011, 7, 1508–1515, doi:10.3762/bjoc.7.176

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Graphical Abstract

Figure 1: Structures of biological active thiols.

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Figure 2: The structure of ACAQ.

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Figure 3: Emission spectra of (a) Zn²⁺–ACAQ or (b) Cd²⁺–ACAQ complex (5 μM) at increasing concentrations of C...

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Figure 4: Job’s plot of Cd²⁺–ACAQ in 10 mM HEPES buffer (pH 7.4) at 298 K. The sum of the concentrations of t...

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Figure 5: Fluorescence spectra of Cd²⁺–ACAQ (10 µm) upon the titration of (a) D-Cys and (b) L-Cys in buffer s...

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Figure 6: Fluoresence emission change of Cd²⁺–ACAQ at 500 nm in response to the addition of 15 equiv amino ac...

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Figure 7: Fluorescence spectra of (10 µm) Cd²⁺–ACAQ upon the titration of various amino acids in buffer solut...

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Figure 8: UV spectra of Cd²⁺–ACAQ (25 µm) upon the titration of (a) D-Cys, (b) L-Cys (0–12 equiv) in buffer s...

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Figure 9: Partial ¹H NMR spectra (400 MHz) of ACAQ (5 mM) before and after the addition of Cd²⁺ and then incr...

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Figure 10: Proposed binding model of Cd²⁺–ACAQ with cysteine.

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Figure 11: Reversibility study. Emission spectra of Cd²⁺–ACAQ complex (5 μM) with 10 equiv L-Cys in buffer sol...

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Full Research Paper

Published 09 Nov 2011

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