Reaction of exciplex formation in the gas phase. Potential curve crossing approach

Deperasińska, Irena; Prochorow, J.

doi:10.1016/0301-0104(87)80114-3

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…Such a collisional mechanism involving electron transfer at a relatively large distance, of the order of 7 in Ñuid solutions,18 with formation Ó of an ion pair (harpooning) is assumed to occur also in the case of gas-phase collisions. 19 Even the DÈBÈA bichromophoric systems in the case of long, Ñexible chains B, for which the AÉ É ÉD interaction in the initial state is negligible may be treated in terms of " intramolecular collisions Ï. 11 On the other hand, photoinduced ET in a molecular system bound in its ground state may be considered as a halfcollision : a local excitation of the AD to the A*D or AD* state,¤ followed by ET : AD ] hl ] A*D , A~D`or AD ] hl ] AD* , A~DT his problem will be discussed in more detail in Section 5.…”

Section: Introductionmentioning

confidence: 99%

Photoinduced electron transfer in isolated, jet-cooled molecular systems

Brenner¹,

Millié²,

Piuzzi³

et al. 1997

Faraday Trans.

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Information about photoinduced electron transfer (ET) in isolated (collision free) molecular systems may be deduced from Ñuorescence and Ñuorescence excitation spectra of jet-cooled donorÈacceptor (DÈA) complexes and bridged donorÈacceptor bichromophores (DÈBÈA). The structures of their di †erent isomeric forms may be obtained by semi-empirical calculations. The relation between structures and essential parameters of ET processes (rates, energy thresholds, etc.) is treated in terms of a model based on the theory of radiationless transitions. Two distinct cases of a rapid (direct) ET corresponding to broad-band excitation spectra and of sequential processes in the systems with narrow-band spectra are discussed. The necessity of further studies and especially of time-resolved experiments at the picosecond timescale is emphasized.

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Section: Introductionmentioning

confidence: 99%

Photoinduced electron transfer in isolated, jet-cooled molecular systems

Brenner¹,

Millié²,

Piuzzi³

et al. 1997

Faraday Trans.

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“…It can be expected that in spite of the high yield of the above process, the energy of complex formation is low [38,39] which follows from the nature of interactions leading to the complex formation [11,40,41]. Most probably these remarks apply also to the complex formed by XT in the Τ1-state and C6H6 molecule in the S0-state.…”

Section: Discussionmentioning

confidence: 99%

Effects of Solute-Solvent Interactions on Radiationless Decay of Thioketones Excited to Their S₂- and T₁-States

et al. 1996

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Spectral and photophysical properties of a few aromatic thioketones in their S2-and T1-state, in particular those determined by their interactions with solvents, are discussed. The reasons for a drastically different behaviour of thioketones in interactions with benzene as well as saturated hydrocarbons and perfluoroalkanes are analysed in more detaił. Results of the time-resolved transient absorption measurements in the pico-and nanosecond time scale are given. An analysis of these results proves that a product of the decay of the S2-state of xanthione in benzene is a new transient (τile > 60 ps) individuum which, regarding the system properties and the conditions of the experiment, has been identified as an exciplex in S 2 -state formed as a result of an efficient interaction with benzene molecule. Also in xanthione/alkane systems the involvement of a transient individuum was proved. Most probably, this individuum was a thioketyl radical which could be formed by hydrogen abstraction from a hydrocarbon molecule by xanthione in the S2 -state. Such individua act as intermediates in passing excitation to the triplet states of thioketones and are effective channels of the S2-state decay. The changes observed in the transient absorption spectra of xanthione in C 6 Η6 in the time range of 10 -7 -10 -6 s can be attributed to the formation of an excimer in the T1-state as a result of the T1-state selfquenching.

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Long‐Range Charge Separation in Solvent‐Free Donor–Bridge–Acceptor Systems

Wegewijs

Verhoeven

1999

Advances in Chemical Physics

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Reaction of exciplex formation in the gas phase. Potential curve crossing approach

Cited by 6 publications

References 24 publications

Photoinduced electron transfer in isolated, jet-cooled molecular systems

Photoinduced electron transfer in isolated, jet-cooled molecular systems

Effects of Solute-Solvent Interactions on Radiationless Decay of Thioketones Excited to Their S₂- and T₁-States

Long‐Range Charge Separation in Solvent‐Free Donor–Bridge–Acceptor Systems

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Reaction of exciplex formation in the gas phase. Potential curve crossing approach

Cited by 6 publications

References 24 publications

Photoinduced electron transfer in isolated, jet-cooled molecular systems

Photoinduced electron transfer in isolated, jet-cooled molecular systems

Effects of Solute-Solvent Interactions on Radiationless Decay of Thioketones Excited to Their S2- and T1-States

Long‐Range Charge Separation in Solvent‐Free Donor–Bridge–Acceptor Systems

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Product

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Effects of Solute-Solvent Interactions on Radiationless Decay of Thioketones Excited to Their S₂- and T₁-States