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.
High r33 and poling efficiency at 1310 nm were achieved for the film containing 100 wt% Y-type chromophores L2–L3 with double donors.
A strong modifiable double donor based on a bis(N-ethyl-N-hydroxyethyl)aniline-derived structure was developed and applied to nonlinear optical materials which show a large r33 value of 351 pm V−1 for the first time.
Direct transfer hydrogenation from a strong electron donor to highly polarizable hemicyanines was discovered in the synthesis of push–pull chromophores. The reaction mechanism and experimental results were elucidated using DFT calculations.
Novel D–π–A–π–A′ chromophores with different substituents in the donor moiety were synthesized and NLO coefficients for composite polymer materials doped with them were measured.