Synthesis and electro-optic activities of novel polycarbonates bearing tricyanopyrroline-based nonlinear optical chromophores with excellent thermal stability of dipole alignment

Construction of a simple crosslinking system and its influence on the poling efficiency and oriental stability of organic electro-optic materials

“…All the T g s appear at nearly 150 C before poling and crosslinking processes. Unlike the EO polycarbonates reported previously, 12,25 the T g values changed slightly with the variation of chromophores content. The EO polymer lms P1-P3 have a high glass transition temperature T g (>145 C) and far more than P (T g ¼ 136 C) which were high enough for the progress of the EO device operation, as shown in Fig.…”

“…The weak change of such reaction conditions can destroy the D-p-A conjugated system and inuence the yield of chromophore A. Comparing with the traditional side chain polycarbonate NLO materials, 12,25 the strategy used in this manuscript avoids the damage of conjugated chromophores caused by high temperature during polycarbonate synthesis or the coupling process, so that the chromophore content in the polymer can be more accurately controlled.…”

The influence of pentafluorophenyl groups on the nonlinear optical (NLO) performance of high generation dendrons and dendrimers

“…For example, to control the shape of the chromophore by the introduction of isolation groups has been proved to be an efficient approach to minimize the strong interactions among chromophore moieties and enhance the poling efficiency; and the spherical shape was considered as the most ideal conformation for the NLO property 17 18 26 . Based on this point, many novel series of NLO dendronized polymers 27 28 29 30 , hyperbranched polymers 31 32 33 , and dendrimers 34 35 36 , which had highly 3D branched structure with the isolation groups, were prepared and exhibited large NLO coefficients. Earlier in 2010, we have discussed the influence of generation number of dendrons.…”

Novel poly(aryl ether ketone) with electro-optic chromophore side chains for light modulators

“…To solve this problem, researchers have focused on either the preparation of novel host polymers containing nonlinear optical chromophores in the main chains with high glass transition temperatures or they have introduced cross linking groups into the electro optic polymer systems [19][20][21][22][23][24]. Else, some advanced material structures (binary system) and poling or devices preparing technologies (slot electrode structure) were added to organic EO materials.…”