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The remarkable phase behavior for binary mixtures of large-core polynuclear aromatic species and small-core discogens cannot be explained simply in terms of net quadrupolar or charge-transfer interactions. The stable π stacking in these mixtures can instead be rationalized by invoking a complimentary polytopic interaction. The picture shows the stacking (in elevation and plan views) between such species.
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Arikainen et al. (2000) studied this question.
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