Abstract
We discuss the photo-induced multielectron transfer in organic mixed-stack charge-transfer crystals, close to the neutral-ionic interface. The quasi-one-dimensional architecture of the stacks stimulates intermolecular electron transfer and the energy gain due to Coulomb interaction creates highly cooperative electronic excitations, the charge-transfer strings. At the neutral-ionic interface charge-transfer exciton is no longer elementary excitation and a pair of neutral-ionic domain walls plays such a role. Photo-generated strings proliferates as a motion of lattice-relaxed neutral-ionic domain walls, a “domino effect” caused by electron-phonon coupling. We show that the cooperative multielectron transfer in tetrathiafulvalene-chloranil (TTF-CA) crystal can be photo-induced as bidirectional transition between neutral and ionic phases. Apart from many application-oriented aspects, the discussed phenomena, photo-induced cooperative multielectron transfer, may serve as a model for he electron-transfer self-organization, the frontier problem in natural sciences.
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Luty, T., Koshihara, S., Cailleau, H. (2000). Photo-Induced Multielectron Transfer in Organic Crystals with Mixed-Stack Architecture. In: Kajzar, F., Agranovich, M.V. (eds) Multiphoton and Light Driven Multielectron Processes in Organics: New Phenomena, Materials and Applications. NATO Science Series, vol 79. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4056-0_29
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DOI: https://doi.org/10.1007/978-94-011-4056-0_29
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