Overall 21 imidazole-based chromophores have been synthesized and fully characterized.The imidazole core was systematically substituted with donors (NMe 2 and OMe) and acceptors (NO 2 and CN groups) additionally separated from the imidazole by π-spacers such as 1,4-phenylen, styryl or thiophen-2-yl in order to finely tune their intramolecular charge transition.The target chromophores were further investigated by UV/Vis spectroscopy as potentially NLO-active compounds.
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Bureš et al. (2009) studied this question.
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