theoretical study on the second hyperpolarizailities of oligomeric systems composed of carbon and silicon π-structures

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ID: 226589
2016
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Abstract
To explore the prospect of molecules involving silicon-silicon multiple bonds as nonlinear optical molecular systems, the relationship between the structure and the second hyperpolarizabilities γ of the oligomeric systems composed of carbon and silicon π-structures is investigated using the density functional theory method. It is found that these compounds indicate intramolecular charge transfer (ICT) from the silicon units to the carbon units together with nonzero diradical characters. The γ values of these compounds are shown to be 2–13 times as large as those of the carbon analogs. Although asymmetric carbon and silicon π-systems exhibit comparable enhancement to the corresponding symmetric systems, donor-π-donor structures exhibit remarkable enhancement of γ despite of their both-end short silicon π-chain moieties (donor units). Further analysis using the odd electron and γ densities clarifies that the intermediate diradical character also contributes to the enhancement of γ. These results predict that even short π-conjugated silicone moieties can cause remarkable enhancement of γ by introducing them into π-conjugated hydrocarbon structures.
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matsui2016moleculestheoretical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Hiroshi Matsui;Takanori Nagami;Shota Takamuku;Soichi Ito;Yasutaka Kitagawa;Masayoshi Nakano
Journal Journal of ethnopharmacology
Year 2016
DOI
10.3390/molecules21111540
URL
Keywords Keywords not found

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