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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Collective and Cooperative Phenomena in Molecular Functional Materials
verfasst von : Anna Painelli, Francesca Terenziani
Erschienen in: Non-Linear Optical Properties of Matter
Verlag: Springer Netherlands
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We discuss cooperative and collective behavior resulting from classical electrostatic intermolecular interactions in molecular materials with negligible intermolecular overlap. With reference to materials based on push-pull chromophores, we discuss the merits of several approximation schemes for the calculation of linear and non-linear optical susceptibilities. Collective and cooperative behavior is recognized in important deviations of the material properties from the oriented gas approximation scheme, and/or from the exciton model. Extreme collective and cooperative behavior in attractive clusters is discussed, where bistable behavior and the phenomenon of multielectron-transfer appear