Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Epr Spectra of $\alpha$-1,2,3-$[H_{n}PV(IV)V_{2}W_{9}O_{40}]^{(7-n)-}$(n = 1, 2 or 3). The Effects of Protonation on the Electron Transfer Rate

  • Published : 1986.04.20
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Abstract

The solution epr spectra of ${\alpha}-1,2,3-[H_nPV(IV)V_2W_9O_{40}]^{(7-n)-}$were measured at various pH and three protonated species have been identified. The spectrum of $H_3PV(IV)Ⅴ_2$ consisting of 8 lines indicates that the V-OH-V bridge prevents effectively the electron transfer between the vanadium atoms. The spectrum of $H_2PV(IV)V_2$ consisting of 15 lines can be interpreted by assuming that the electron is hopping fast between the two vanadium atoms in the V-O-V sequence. The multi-line spectrum of $HPV(IV)V_2$ is interpreted as a poorly resolved 43-line spectrum which originates from the electron hopping among the three vanadium atoms with the forward and backward transition probabilities of 4:1 in the OH-V-O-V sequence.

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References

  1. Bull. Korean Chem. Soc. v.7 C.W. Lee;H. So;K.R. Lee
  2. J. Am. Chem. Soc. v.102 M.M. Mossoba;C.J. O'Connor;M.T. Pope;E. Sinn;G. Herve;A. Teze
  3. J. Am. Chem. Soc. v.105 S.P. Harmalker;M.A. Leparulo;M.T. Pope
  4. J. Am. Chem. Soc. v.105 P.J. Domaille

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