Synthesis and NLO properties of 4-(4H-chalcogenopyran-4-ylidene and 4H-chalcogenochromen-4-ylidene)-1-(phenylthio)but-2-enylidene complexes - Electronic influence of the carbene fragment - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Journal of Inorganic Chemistry Année : 2006

Synthesis and NLO properties of 4-(4H-chalcogenopyran-4-ylidene and 4H-chalcogenochromen-4-ylidene)-1-(phenylthio)but-2-enylidene complexes - Electronic influence of the carbene fragment

Résumé

The synthesis of 4-(4H-chalcogenopyran-4-ylidene and 4H-chalcogenochromen-4-ylidene)-1-(phenylthio)but-2-enyl-idene complexes is described and their non-linear optical (NLO) properties have been investigated (as mu beta by EFISH). NMR studies and X-ray crystallographic analyses show that the (phenylthio)carbene fragment has a better electron-withdrawing capability than the methoxy analogues and, likewise, the corresponding thiocarbenes have a more significant pyrylium character. The mu beta values of these complexes were obtained from EFISH experiments. The microscopic NLO response is sensitive to the nature of the intracyclic chalcogen atom, the nature of the metal centre and the benzo-annulation of the heterocycle.

Dates et versions

hal-00172475 , version 1 (17-09-2007)

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Nadège Faux, Françoise Robin-Le Guen, Pascal Le Poul, Bertrand Caro, Keitaro Nakatani, et al.. Synthesis and NLO properties of 4-(4H-chalcogenopyran-4-ylidene and 4H-chalcogenochromen-4-ylidene)-1-(phenylthio)but-2-enylidene complexes - Electronic influence of the carbene fragment. European Journal of Inorganic Chemistry, 2006, 17, pp.3489-3497. ⟨10.1002/ejic.200600300⟩. ⟨hal-00172475⟩
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