Channu, B. C. and Kalpana, H. N. and Ramesh, L. and Dass, Chhabil and Eregowda, G. B. and Thimmaiah, K. N. (2000) Spectral and Cyclic Voltammetric of Oxidized Products of 10-[4′-(N-Diethylamino)Butyl]-2-Chlorophenoxazine and its Applications in Redox Titrimetry. Mikrochimica Acta, 134 (3-4). pp. 125-132.
Full text not available from this repository. (Request a copy)Abstract
10-4'-(N-diethylamino)butyl]-2-chlorophenoxazine (DBCP) undergoes a reversible one-electron oxidation with cerium (IV) to form a pink coloured radical cation DBCP+.] in the presence of stoichiometric amounts DBCP: Ce(IV)= 1:1] of the reactants. The radical cation underwent a second one-electron oxidation to form a brownish yellow coloured dication DBCP2+] in the presence of more than one equivalent of cerium(IV), which was characterized by UV-vis, IR and mass spectrometry. The cyclic voltammogram of DBCP exhibited two anodic waves at 721 mV and 1158 mV and two cathodic waves at 653 mV and 1076 mV at a scan rate of 24 mV/s. The peak at 721 mV corresponds to the oxidation of DBCP to the radical cation DBCP+.] and the second anodic peak at 1158 mV stands for the oxidation of the radical cation to the dication DBCP2+]. Bromine oxidizes DBCP to three products as evidenced by HPLC and the tentatively predicted structures based on the mass-spectral data support the formation of brominated oxidized products. In order to explore the analytical applications, the optimum conditions for the successful use of DBCP as a redox indicator in the macro and micro estimation of ascorbic acid, methionine, isoniazid, phenylhydrazine hydrochloride and biotin using chloramine-B as oxidant, have been developed. The indicator gives sharp and stoichiometric end-points.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | phenoxazine derivative; redox indicator |
| Subjects: | C Chemical Science > Chemistry |
| Divisions: | Department of > Chemistry |
| Depositing User: | C Swapna Library Assistant |
| Date Deposited: | 18 Dec 2020 10:18 |
| Last Modified: | 23 Sep 2022 06:53 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/14239 |
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