Design and synthesis of Phenylaminothiophene donor-based chromophore with enhanced electro-optic activity

A modifiable double donor based on bis(N-ethyl-N-hydroxyethyl)aniline for organic optical nonlinear chromophores

“…However, a dual peak and large red-shift for a long-wavelength peak were observed for BLD1 and BLD3 when the dielectric constant of the solvent exceeds that of chloroform in those chromophores suggesting the transition from the neutral polyene limit to a molecule with partial zwitterionic (cyanine) character. 15,17,33…”

“…However, a dual peak and large red-shift for a long-wavelength peak were observed for BLD1 and BLD3 when the dielectric constant of the solvent exceeds that of chloroform in those chromophores suggesting the transition from the neutral polyene limit to a molecule with partial zwitterionic (cyanine) character. 15,17,33 The absorption maxima (l max ) of chromophores BLD1-BLD4 in film were (l max ) 1105 nm, 733 nm, 1099 nm and 748 nm, respectively, which were different from the absorption in solution which may be due to the polar environment in the solid-state. 33,34…”

“…The electro-optic coefficients of chromophores BLD2 and BLD4 were also near 200 pm V À1 due to the high chromophore content and large hyperpolarizability which were higher than those of traditional chromophores capped with the TCF acceptor. 40…”

“…13 Aniline-based donors (triarylamino, alkylaniline etc. ), [14][15][16][17] heterocyclic or polyene bridges, 12,16,18 TCF or CF 3 -TCF derived acceptors 19,20 are the most common chromophore structures. The rational combination of a strong donor, acceptor and suitable electron bridge would result in large first-order hyperpolarizability.…”

Quadratic nonlinear optical response of composite polymer materials based on push–pull quinoxaline chromophores with various groups in the aniline donor moiety

“…3 Various attempts were made to improve chromophore properties; one of them is the modification of the donor moiety. Many D–π–A chromophores with donors based on the aniline structure: triarylamino-, 4 tetrahydroquinoline-, 5 julolidine-, 6 and phenothiazine-derivatives, 7 as well as aminothiophene or aminopyrrole structure 4 b ,8 and those based on various fused heterocycles and carbocycles: aminobenzothiophene-, 9 aminobenzofuran-, 10 indolizine- 11 and aminofluorene derivatives, 12 have been synthesized and the electrooptic (EO) and/or NLO properties of the composite materials containing these dyes as guests were studied. A new strategy exploited recently to improve the first hyperpolarizability of chromophores is focused on the modification and improvement of donors via the introduction of heteroatom-containing groups or the use of double donor structure to increase the electron-donating ability of the donors; the thienothiophene moiety was explored as a replacement for the phenyl unit in the donor part of the chromophore.…”