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Synthèse et caractérisation des propriétés optiques de structures donneur-accepteur conjuguées par un système hétérocyclique central

Abstract : The synthesis of organic compound as components of materials for nonlinear optics has been the focus of many researches because of their potential uses in the fields of optical communications, information process, imagery ... Most often, the molecules with strong hyperpolarizabilitie [bêta] values incorporate a pair of donor-acceptor groups connected via a [pi] -conjugated system. Those containing heterocycles motifs received considerable attention in the field of nonlinear optics due to their relative facility of preparation. We are interested in designing of new molecules with the structure previously described. The structural changes have focused on the donor group (alkoxy, dialkylamino carried by an aromatic ring), the acceptor group (dicyanovynil, cyanoacrylic acid and thiobarbituric acid) and [pi]-conjugated system (thiophene, thieno[3,2-b]thiophene and bithiophene). The optical properties of these compounds have been studied and we have established some links between some structural changes and optical properties. The high values of [bêta] obtained clearly show the potential of compounds prepared and used to explore other structural modifications to improve these values
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Cyril Herbivo. Synthèse et caractérisation des propriétés optiques de structures donneur-accepteur conjuguées par un système hétérocyclique central. Autre. Université Paul Verlaine - Metz, 2009. Français. ⟨NNT : 2009METZ035S⟩. ⟨tel-01752659⟩

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