Abstract

MUNOZ-FLORES, Blanca M. et al. Synthesis and chemical-optical characterization of push-pull stilbenes. Rev. latinoam. quím [online]. 2012, vol.40, n.3, pp.178-186. ISSN 0370-5943.

In this work we report the synthesis and spectroscopic characterization of push pull stilbenes. These compounds were prepared in good yield and characterized by ¹H and ¹³C NMR, IR and MS. Single-crystal X-ray diffraction analysis of acids 1 and 2 evidenced the existence of intermolecular hydrogen bonding which in the case of compound 1 [(Z)-isomer] involves interaction between the acid group and a methoxy group other neighbor molecule in contrast for in (E)-isomer (2) the intermolecular hydrogen bonding is between the acid groups promoting the formation of centrosymmetric dimmers. From acids 1 and 2 was obtained the ester 3, for which was improved its solubility properties. Lineal and non linear optical characterization of ester derivative was carried out in particular the second molecular hyperpolarizability using the Maker-Fringe technique.

Keywords : Stilbene; push-pull; nonlinear optics; NLO; X-ray diffraction.

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