4.4 Article

Highly selective colorimetric/fluorometric chemodosimeters for cyanide ions in aqueous solution based on Michael addition to C-atom possessing different polar substituents

Journal

TETRAHEDRON LETTERS
Volume 55, Issue 45, Pages 6281-6285

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2014.09.096

Keywords

Cyanide; Sensor; Dosimeter; Colorimetric; Fluorometric

Funding

  1. UGC, New Delhi

Ask authors/readers for more resources

Two simple chemosensors, 3-(4-aminophenyl)-2-cyanoacrylic acid (1) and 3-(3-aminophenyl)-2-cyanoacrylic acid (2), exhibited visual colour and fluorescence changes selectively with cyanide ions in aqueous solution. Their anion sensing properties were investigated using UV-vis, fluorescence and H-1 & C-13 NMR spectral studies and theoretical studies. The mechanism of sensing involves Michael addition of CN- to C=C bond. The addition reaction was found to occur relatively easier with p-NH2C6H4 group (Taft's sigma* 0.16) substituted C=C bond than that with m-NH2C6H4 group (sigma* 0.58) substituted compound. The detection limits were calculated to be 33 pM and 0.2 nM for the receptors 1 and 2, respectively, which are lower than the maximum permissible concentration of cyanide ion in drinking water (1.9 mu M) set by the World Health Organization (WHO). (C) 2014 Elsevier Ltd. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.4
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
Article Chemistry, Organic

Pyrrolidine-based C1-symmetric chiral transition metal complexes as catalysts in the asymmetric organic transformations

Geeta Devi Yadav, Pooja Chaudhary, Balaram Pani, Surendra Singh

Summary: Chiral transition metal complexes with privileged ligands are efficient catalysts for various asymmetric organic transformations. Transition metal complexes of C1-symmetric pyrrolidine-based ligands have been widely used in asymmetric organic reactions. However, a comprehensive review article on the transition metal complexes of chiral C1-symmetric pyrrolidine-based ligands derived from (L)-proline has not been published.

TETRAHEDRON LETTERS (2024)