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- W2078341103 abstract "In order to give an insight of the special spectra of isolated π systems, a series of pyrene–fluorene derivatives, with conjugated or non-conjugated pyrene groups, were systematically studied. Besides absorption of non-conjugated pyrene itself and main conjugation chain, all the pyrene-non-conjugated large conjugated materials show a characteristic sharp absorption peak at ∼352 nm. Through systematical investigation, this special absorption peak was attributed to the intramolecular through-space interaction between the two isolated large π systems. Such interaction could also be defined as π – π hyperconjugation. And from quantum calculation, this intramolecular interaction does shorten the length of single bond. Through systematical research, the condition of this intramolecular through-space interaction is proved to be that the non-conjugated pyrene must have projection on fluorene plane. And then this effect is applied to explain the improved injection ability of the materials by bringing out one simple hopping model." @default.
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- W2078341103 date "2013-03-01" @default.
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- W2078341103 title "Isolated large π systems in pyrene–fluorene derivatives for intramolecular through-space interaction in organic semiconductors" @default.
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- W2078341103 doi "https://doi.org/10.1016/j.orgel.2012.12.035" @default.
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