Structure, phase (aggregate) state, and optical properties of a new heat-resistant polymer with a nonlinear optical chromophore

10.1007/s11451-008-3027-3

“…For samples C and D (the mechanical mixture with the chromophore), we obtained conventional time dependences of the SHG signal intensity previously described in [1]: a monotonic decrease in the SHG signal with time from the maximum value observed immediately after completion of the polarization.…”

“…This work is a continuation of the investigation started in [1] and has been devoted to the study of the interrelation between the macromolecular structure, the degree of organization of a nonlinear optical chromophore (dye) in the polymer, and the efficiency of its nonlinear optical properties. In particular, we investigated the effect of the onium salt, i.e., triphenylsulfonium hexafluorophosphate, on the processes promoting the formation of oriented ensembles of chromophore molecules chemically bonded to the polymer and the formation of a new nonlinear optical medium.…”

“…Structural investigations of powdered samples of silicon-containing poly( o -hydroxyamide) (hereafter, it will be referred to as the copolymer I ) containing the nonlinear optical chromophore, i.e., 4'-{(6-chlorohexyl)methylamino}-4-nitroazobenzene, in the side chain by x-ray diffraction and differential scanning calorimetry revealed that the covalent attachment of the nonlinear optical chromophore having a crystal structure to the side chain of the amorphous polymer leads to the formation of the domain structure with an ordered crystal packing [1]. This structure of the macromolecule seems to be promising for the fabrication of nonlinear optical media, because the formation of the given structure can lead to a substantial increase in the stability of nonlinear optical properties of polymer films.…”