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Chinese Science Bulletin

, Volume 46, Issue 15, pp 1285–1288 | Cite as

Voltammetric studies on free radicals of lower fatty alcohols

  • Junfeng Song
  • Huafeng Fu
  • Wei Guo
Notes

Abstract

In this work, both generation and reduction processes of the α-radicals of lower fatty alcohols were studied by voltammetry in lower fatty alcohols/peroxydisulfate/phosphate buffer system. Experimental results showed that such three reactions were successively completed at negative potential on mercury electrode surface: (i) sulfate radical anion SO 4 was generated electrochemically from one-electron reduction of peroxydisulfate ion S2O 8 2− , (ii) the SO 4 oxidized lower fatty alcohols to the corresponding α-radicals and (iii) the α-radicals were reduced in one-electron and one-proton addition to produce their own reduction waves. The apparent free energy ΔrGm of the α-radicals of lower straight-chain fatty alcohols such as methanol, ethanol, propanol, butanol and pentanol obtained were 107.09, 116.74, 122.53, 126.39 and 129.28 kJ · mol/L, respectively. The proposed method is more simple and convenient than the current approaches based on the radical-chain reaction for studying alcohol oxidation.

Keywords

lower fatty alcohols alcohol α-radical peroxydisulfate sulfate radical anion voltammetry 

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Copyright information

© Science in China Press 2001

Authors and Affiliations

  • Junfeng Song
    • 1
  • Huafeng Fu
    • 1
  • Wei Guo
    • 2
  1. 1.Institute of Electroanalytical ChemistryNorthwest UniversityXi’anChina
  2. 2.Department of ChemistryNorthwest UniversityXi’anChina

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