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Bisthiocarbohydrazones as colorimetric and “Turn on” fluorescent chemosensors for selective recognition of fluoride / Saravana Loganathan Ashok Kumar in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12379-12383 Titre : Bisthiocarbohydrazones as colorimetric and “Turn on” fluorescent chemosensors for selective recognition of fluoride Type de document : texte imprimé Auteurs : Saravana Loganathan Ashok Kumar, Auteur ; Ramalingam Tamilarasan, Auteur ; Moorthy Saravana Kumar, Auteur Année de publication : 2012 Article en page(s) : pp. 12379-12383 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Bisthiocarbohydrazone  Heterocyclic Résumé : Bisthiocarbohydrazone derivatives of two heterocyclic ketones were designed and synthesized to selectively sense fluoride ion from a biologically competing solvent dimethylsulfoxide (DMSO). The selective recognition of fluoride is clearly visible to the naked eye with a distinct color change. The recognition mechanism has been investigated by UV–visible, fluorescence spectroscopy, and 1H NMR titration experiments. From the Benesi–Hidebrand equation and Job's plot, it was inferred that both compounds bind to fluoride with a 1:1 stoichiometry. 1H NMR titration data indicates deprotonation of the NH protons by fluoride as a prominent step in the recognition. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2013696 [article] Bisthiocarbohydrazones as colorimetric and “Turn on” fluorescent chemosensors for selective recognition of fluoride [texte imprimé] / Saravana Loganathan Ashok Kumar, Auteur ; Ramalingam Tamilarasan, Auteur ; Moorthy Saravana Kumar, Auteur . - 2012 . - pp. 12379-12383. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12379-12383 Mots-clés : Bisthiocarbohydrazone  Heterocyclic Résumé : Bisthiocarbohydrazone derivatives of two heterocyclic ketones were designed and synthesized to selectively sense fluoride ion from a biologically competing solvent dimethylsulfoxide (DMSO). The selective recognition of fluoride is clearly visible to the naked eye with a distinct color change. The recognition mechanism has been investigated by UV–visible, fluorescence spectroscopy, and 1H NMR titration experiments. From the Benesi–Hidebrand equation and Job's plot, it was inferred that both compounds bind to fluoride with a 1:1 stoichiometry. 1H NMR titration data indicates deprotonation of the NH protons by fluoride as a prominent step in the recognition. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2013696