Bulletin of the Korean Chemical Society

  • 제31권11호
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  • Pages.3133-3138
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  • 2010
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Electrochemical and Spectroelectrochemical Behaviors of Vitamin K1/Lipid Modified Electrodes and the Formation of Radical Anion in Aqueous Media

  • 투고 : 2010.07.28
  • 심사 : 2010.09.17
  • 발행 : 2010.11.20
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초록

The electrochemical properties of the liposoluble vitamin $K_1$ adsorbed on bare and lipid coated glassy carbon electrodes (GCEs) were studied in unbuffered and well buffered aqueous media. The reduction products of vitamin $K_1$ were characterized by employing cyclic voltammetry and the in situ UV-visible spectroelectrochemical technique. The radical species of vitamin $K_1$ cannot be observed at the bare GCEs in well buffered media. The formation of the anion radical of vitamin $K_1$ was observed in unbuffered solutions above pH 5.9 or at the lipid coated GCE in a well-buffered solution. UV-visible absorption bands of neutral vitamin $K_1$ were observed at 260 nm and 330 nm, and a band corresponding to the anion radical species was observed at 450 nm. The derivative cyclic voltabsorptometric (DCVA) curves obtained for electrochemical reduction of vitamin $K_1$ confirmed the presence of both neutral and anion radical species. The anion radical of vitamin $K_1$ formed at the hydrophobic conditions with phosphatidylcholine (PC) lipid coated electrode was stable enough to be observed in the spectroelectrochemical experiments.

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피인용 문헌

  1. Voltammetry of the liposoluble vitamins (A, D, E and K) in organic solvents vol.12, pp.1, 2012, https://doi.org/10.1002/tcr.201100005
  2. Produced in Aqueous–Organic Solutions Exists in Equilibrium with Its Hydrogen-Bonded Semiquinone Anion Radical vol.117, pp.8, 2013, https://doi.org/10.1021/jp4003966
  3. Voltammetry within structured liquid nanosystems: Towards the design of a flexible, three-dimensional framework for artificial photosystems vol.70, pp.None, 2010, https://doi.org/10.1016/j.electacta.2012.03.052
  4. Deconvoluting Surface-Bound Quinone Proton Coupled Electron Transfer in Unbuffered Solutions: Toward a Universal Voltammetric pH Electrode vol.141, pp.2, 2010, https://doi.org/10.1021/jacs.8b11518
  5. Simultaneous Determination of Vitamin E and Vitamin K in Food Supplements Using Adsorptive Stripping Square-Wave Voltammetry at Glassy Carbon Electrode vol.10, pp.14, 2010, https://doi.org/10.3390/app10144759