Systematic study on the optimization of a bis( N , N -diethyl)aniline based NLO chromophore via a stronger electron acceptor, extended π-conjugation and isolation groups

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New chromophores which contains the optimal structure of the same bis( N , N -diethyl)aniline donor were synthesized and the hyperpolarizability β can be effectively translated into large electro-optic coefficients in poled polymers.