메뉴 건너뛰기




Volumn 119, Issue 26, 1997, Pages 6095-6106

Reactivity toward dioxygen of dicobalt face-to-face diporphyrins in aprotic media. Experimental and theoretical aspects. Possible mechanistic implication in the reduction of dioxygen

Author keywords

[No Author keywords available]

Indexed keywords

COBALT; DIMER; OXYGEN; PORPHYRIN DERIVATIVE;

EID: 0004149190     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9618659     Document Type: Article
Times cited : (72)

References (109)
  • 52
    • 0000653246 scopus 로고
    • Dolphin, D., Ed.; Academic Press: New York
    • (c) James, B. R. In The Porphyrins; Dolphin, D., Ed.; Academic Press: New York, 1978; Vol. V, Part C, p 205.
    • (1978) The Porphyrins , vol.5 , Issue.PART C , pp. 205
    • James, B.R.1
  • 57
    • 16944364371 scopus 로고    scopus 로고
    • note
    • Throughout the present paper, P designates the π-rings of the porphyrins. The dot designates an electron delocalized over the two π-rings, and the three dashes are the equivalent of a weak π-π bond obtained by pairing of two electrons (see ref 17). In the following the formal redox states of the cobalt will be omitted unless the issue of the electron repartition is specifically addressed.
  • 58
    • 16844387585 scopus 로고    scopus 로고
    • note
    • 17,18 we designate (i) by process the global abstraction of two electrons from the dimer, corresponding to one electron for each monomeric unit constituting the dimer, and (ii) by step each of the individual electrochemical reactions. Each process can thus take place either in two one-electron steps or in one two-electron step, not excluding that they may be intermingled.
  • 61
    • 16944362423 scopus 로고
    • Thèse d'Etat, Université de Bretagne Occidentale, Brest, France
    • (c) Le Mest, Y. Thèse d'Etat, Université de Bretagne Occidentale, Brest, France, 1988.
    • (1988)
    • Le Mest, Y.1
  • 67
    • 16944365170 scopus 로고    scopus 로고
    • note
    • III redox state.
  • 69
    • 0002092712 scopus 로고
    • Dolphin, D., Ed.; Academic Press: New York
    • (a) Felton, R. H. In The Porphyrins; Dolphin, D., Ed.; Academic Press: New York, 1978; Vol. V, Part C, p 53.
    • (1978) The Porphyrins , vol.5 , Issue.PART C , pp. 53
    • Felton, R.H.1
  • 70
    • 0001430189 scopus 로고
    • Dolphin, D., Ed.; Academic Press: New York
    • (b) Fajer, J.; Davis, M. S. In The Porphyrins; Dolphin, D., Ed.; Academic Press: New York, 1979; Vol. IV, Part B, p 197.
    • (1979) The Porphyrins , vol.4 , Issue.PART B , pp. 197
    • Fajer, J.1    Davis, M.S.2
  • 71
    • 16944366351 scopus 로고    scopus 로고
    • note
    • 2O, and a mixture of electronic configurations (e.g., a triplet state).
  • 74
    • 0022129437 scopus 로고
    • (c) Scheme 1 corresponds almost exactly to that proposed by Savéant et al. from similar observations as a model example. Thermodynamic treatment for the determination of the constants was made following the same procedure. Lexa, D.; Rentien, P.; Savéant, J. M.; Xu, F. J. Electroanal. Chem. 1985, 191, 253.
    • (1985) J. Electroanal. Chem. , vol.191 , pp. 253
    • Lexa, D.1    Rentien, P.2    Savéant, J.M.3    Xu, F.4
  • 75
    • 0000618347 scopus 로고
    • and references therein
    • An IPP (isopotential point) is the equivalent in voltammetry of an isosbestic point in spectroscopy; it arises when one electroactive species undergoes a transformation to form another. The existence of an IPP implies that the transformation is quantitative and the sum of the reactants and products remains constant. If there are any side reactions involving either set of species, an IPP does not occur. See: Gaudiello, J. G.; Wright, T. C.; Jones, R. A.; Bard, A. J. J. Am. Chem. Soc. 1985, 107, 888 and references therein.
    • (1985) J. Am. Chem. Soc. , vol.107 , pp. 888
    • Gaudiello, J.G.1    Wright, T.C.2    Jones, R.A.3    Bard, A.J.4
  • 76
    • 46549098867 scopus 로고
    • max of the Soret band of the oxy form of the complexes (400-410 nm range), where the absorbance variations are maximal. The data were computed with the "Micmac" program for nonlinear least-squares multiparametric refinement of Laouenan et al., which allows the direct determination of the equilibrium constants. See: Laouénan, A.; Suet, E. Talanta 1985, 32, 245.
    • (1985) Talanta , vol.32 , pp. 245
    • Laouénan, A.1    Suet, E.2
  • 77
    • 16944367305 scopus 로고    scopus 로고
    • note
    • O2(2) are constant within this range, and the averages are presented in Table 2.
  • 78
    • 16944365960 scopus 로고    scopus 로고
    • note
    • 16 and consequently the observation of isosbestic sets of spectra.
  • 79
    • 16944366107 scopus 로고    scopus 로고
    • Solomon, E. I.; Hemming, B. L.; Root, D. E. In ref 12a
    • (a) Solomon, E. I.; Hemming, B. L.; Root, D. E. In ref 12a.
  • 80
    • 16944366622 scopus 로고    scopus 로고
    • Tyeklár, Z.; Karlin, K. D. Ibid
    • (b) Tyeklár, Z.; Karlin, K. D. Ibid.
  • 84
    • 37049049612 scopus 로고
    • Pauling, L. Nature 1964, 203, 182.
    • (1964) Nature , vol.203 , pp. 182
    • Pauling, L.1
  • 95
    • 16944366539 scopus 로고    scopus 로고
    • (e) The compound of Kitajima et al. has been found to model accurately the structure of the Limulus polyphemus oxyhemocyanin reported sometime later:
    • Limulus Polyphemus
  • 99
    • 0001568219 scopus 로고
    • For a recent review on theoretical studies of metal-dioxygen complexes see: Bytheway, I.; Hall, M. B. Chem. Rev. 1994, 94, 639.
    • (1994) Chem. Rev. , vol.94 , pp. 639
    • Bytheway, I.1    Hall, M.B.2
  • 102
    • 16944366311 scopus 로고    scopus 로고
    • note
    • 11
  • 103
  • 106
    • 16944365693 scopus 로고    scopus 로고
    • note
    • 3
  • 108
    • 16944366189 scopus 로고    scopus 로고
    • note
    • 2 complexes would require a higher level of theory. Such calculations are in progress.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.