654050-45-0Relevant academic research and scientific papers
New polymethacrylic nonlinear optical materials containing multichromophores in the side chain
Vakhonina, Tatyana A.,Kadyrova, Alfira A.,Sarvarov, Timur M.,Smirnov, Maksim A.,Ivanova, Nataliya V.,Khamatgalimov, Ayrat R.,Balakina, Marina Yu.,Sinyashin, Oleg G.
, p. 272 - 274 (2018)
New polymer materials based on methacrylic copolymers with chromophore-containing dendritic fragments in the side chain have been obtained. The nonlinear optical coefficients of 22, 23 and 28 pm V–1 have been determined for polymers with 18, 21 and 30 mol% content of dendritic fragments, respectively.
Sequentially adsorbed electrostatic multilayers of branched side-chain polyelectrolytes bearing donor-acceptor type azo chromophores
Wang, Haopeng,He, Yaning,Tuo, Xinlin,Wang, Xiaogong
, p. 135 - 146 (2004)
Two newly synthesized polyelectrolytes (PBANT-AC and PBACT-AC) functionalized with branched side chains bearing electron donor-acceptor type azobenzene chromophores were used as polyanions to build up multilayer films through an electrostatic sequential adsorption process by using poly(diallyldimethylammonium chloride) (PDAC) as the polycation. When dissolved in anhydrous DMF and a series of DMF-H2O mixed solvents with different DMF to H2O ratios, both azo polyelectrolytes could form uniform multilayer films through the layer-by-layer adsorption process. Altering the water content of the dipping solutions of both azo polyelectrolytes was found to dramatically change the thickness of the sequentially adsorbed bilayers, chromophore orientation, and surface roughness of the multilayer films. On the other hand, the solvent effect on the H-aggregation in the multilayer films was determined by the structural details of the azo polyelectrolytes. After the irradiation with a linearly polarized Ar+ laser beam at 488 nm, significant dichroism was induced in the PBANT-AC/PDAC multilayer films prepared from the DMF dipping solution. Upon exposure to an interference pattern of Ar+ laser beam at modest intensities, optically induced surface modulation on the multilayer surfaces was observed.
Development of new nonlinear optical polymers based on epoxy- amine oligomers with Bi-chromophore fragments in the side chain
Nazmieva, Gulshat N.,Vakhonina, Tatiana А.,Ivanova, Nataliya V.,Sharipova, Anastasiya V.,Fominykh, Olga D.,Smirnov, Maxim A.,Balakina, Marina Yu,Sinyashin, Oleg G.
, p. 253 - 265 (2018/07/13)
For the first time bichromophore nonlinear optically active compounds, 3,5-bis [2- (N-ethyl-4- (4′-nitrophenylazo) anilino) ethoxy] benzyl alcohol, DF1, and 3,5-bis [6- (N-methyl-4- (4′-nitrophenylazo) anilino) hexaoxy] benzyl alcohol, DF2, have been synthesized. The synthesis of the epoxy-amine oligomers containing DF1 and DF2 dendritic fragments in the side chain was preceded by molecular design which demonstrated that the hexyl groups, binding the chromophores to the branching center in DF2, are able to provide greater mobility of the chromophores compared to the ethyl groups in DF1, thus determining the preference of the former from the viewpoint of NLO activity. Bi-chromophore compounds were introduced into the side chain of epoxy amine oligomers using the esterification reaction under mild conditions by the Steglich method. As a result, oligomers OAB-DF1 (Tg = 122 °C) and OAB-DF2 (Tg = 107 °C) were obtained with good yields, the degree of functionalization was 60 mol% and 45 mol%, respectively. The values of the NLO coefficients, d33, were measured by second harmonic generation technique; they are equal to 29 pm/V for OAB-DF1 and 40 pm/V for OAB-DF2.
