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Shi, Yanrong; Lou, Alexander J.-T; He, Guang S; Baev, Alexander; Swihart, Mark T; Prasad, Paras N; Marks, Tobin J
Journal of the American Chemical Society, 04/2015, Letnik: 137, Številka: 14Journal Article
We report a new class of hybrid π-electron chromophores with a large, sign-tunable third-order nonlinear optical (NLO) response, achieved via cooperative coupling of cyanine dye bond-length alternation effects with the rich density of states in zwitterionic twisted π-system chromophores. A combined synthetic, linear/nonlinear spectroscopic, and quantum chemical study reveals exceptional third-order response exceeding the sum of the individual chromophore contributions.
