Electrochimie organique photoassistee: Une reaction photoinduite du radical cation de la tetraphenylporphyrine de zinc

Galland, Bruno; Moutet, Jean‐Claude; Reverdy, Gilbert

doi:10.1016/0013-4686(87)87029-9

Cited by 3 publications

(1 citation statement)

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“…The excited ZnTPPS •3-/ MV •+ state may also involve the porphyrin radical anion (ZnTPPS •3-) that has lower lying excited states. ZnTPP •+ has been shown to perform electron transfer under continuous illumination with 400 nm light, 39 and Okhrimenko and coworkers have shown a 17 ps relaxation time of ZnTPP •+ excited at 400 nm which they interpreted as a D 1 f D 0 internal conversion and a conformational/vibrational relaxation process. 40 The difference spectrum of the excited ZnTPP •+ in ref 40 shows a rather opposite behavior to the one seen for the excited MV •+ , however, and cannot explain the differences seen in Figure 9.…”

Section: Resultsmentioning

confidence: 99%

Ultrafast Electron Transfer Dynamics of a Zn(II)porphyrin−Viologen Complex Revisited: S₂ vs S₁ Reactions and Survival of Excess Excitation Energy

et al. 2010

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The photoinduced electron transfer reactions in a self-assembled 1:1 complex of zinc(II)tetrasulphonatophenylporphyrin (ZnTPPS(4-)) and methylviologen (MV(2+)) in aqueous solution were investigated with transient absorption spectroscopy. ZnTPPS(4-) was excited either in the Soret or one of the two Q-bands, corresponding to excitation into the S(2) and S(1) states, respectively. The resulting electron transfer to MV(2+) occurred, surprisingly, with the same time constant of τ(FET) = 180 fs from both electronic states. The subsequent back electron transfer was rapid, and the kinetics was independent of the initially excited state (τ(BET) = 700 fs). However, ground state reactants in a set of vibrationally excited states were observed. The amount of vibrationally excited ground states detected increased with increasing energy of the initial excited state, showing that excess excitation energy survived a two-step electron transfer reaction in solution. Differences in the ZnTPSS(•3-)/MV(•+) spectra suggest that the forward electron transfer from the S(2) state at least partially produces an electronically excited charge transfer state, which effectively suppresses the influence of the inverted regime. Other possible reasons for the similar electron transfer rates for the different excited states are also discussed.

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Section: Resultsmentioning

confidence: 99%

Ultrafast Electron Transfer Dynamics of a Zn(II)porphyrin−Viologen Complex Revisited: S₂ vs S₁ Reactions and Survival of Excess Excitation Energy

et al. 2010

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Poly(pyrrole-metallotetraphenylporphyrin)-modified electrodes

Deronzier

Devaux

Limosin

et al. 1992

Journal of Electroanalytical Chemistry

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Applications to Reaction Mechanism Studies of Organic Systems

Majima¹

2003

Charged Particle and Photon Interactions With Matter

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Electrochimie organique photoassistee: Une reaction photoinduite du radical cation de la tetraphenylporphyrine de zinc

Cited by 3 publications

References 8 publications

Ultrafast Electron Transfer Dynamics of a Zn(II)porphyrin−Viologen Complex Revisited: S₂ vs S₁ Reactions and Survival of Excess Excitation Energy

Ultrafast Electron Transfer Dynamics of a Zn(II)porphyrin−Viologen Complex Revisited: S₂ vs S₁ Reactions and Survival of Excess Excitation Energy

Poly(pyrrole-metallotetraphenylporphyrin)-modified electrodes

Applications to Reaction Mechanism Studies of Organic Systems

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Electrochimie organique photoassistee: Une reaction photoinduite du radical cation de la tetraphenylporphyrine de zinc

Cited by 3 publications

References 8 publications

Ultrafast Electron Transfer Dynamics of a Zn(II)porphyrin−Viologen Complex Revisited: S2 vs S1 Reactions and Survival of Excess Excitation Energy

Ultrafast Electron Transfer Dynamics of a Zn(II)porphyrin−Viologen Complex Revisited: S2 vs S1 Reactions and Survival of Excess Excitation Energy

Poly(pyrrole-metallotetraphenylporphyrin)-modified electrodes

Applications to Reaction Mechanism Studies of Organic Systems

Contact Info

Product

Resources

About

Ultrafast Electron Transfer Dynamics of a Zn(II)porphyrin−Viologen Complex Revisited: S₂ vs S₁ Reactions and Survival of Excess Excitation Energy

Ultrafast Electron Transfer Dynamics of a Zn(II)porphyrin−Viologen Complex Revisited: S₂ vs S₁ Reactions and Survival of Excess Excitation Energy