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The compounds were fully characterized by NMR, FTIR and UV\/Vis spectroscopy and their electrochemical behaviour studied by cyclic voltammetry. Quadratic hyperpolarizabilities (<jats:italic>\u03b2<\/jats:italic>) were determined by hyper\u2010Rayleigh scattering measurements at a fundamental wavelength of 1500 nm. Density functional theory calculations were employed to rationalize the second\u2010order non\u2010linear optical properties of these complexes.<\/jats:p>","DOI":"10.1002\/ejic.201300048","type":"journal-article","created":{"date-parts":[[2013,5,31]],"date-time":"2013-05-31T09:36:09Z","timestamp":1369992969000},"page":"3506-3517","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Benzo[<i>c<\/i>]thiophene Chromophores Linked to Cationic Fe and Ru Derivatives for NLO Materials: Synthesis Characterization and Quadratic Hyperpolarizabilities"],"prefix":"10.1002","volume":"2013","author":[{"given":"Tiago J. 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