The design, synthesis and nonlinear optical properties of a novel, Y-type polyurethane containing tricyanovinylthiophene of high thermal stability

Synthesis and nonlinear optical properties of novel Y-type polyurethane containing nitrothiazolylazoresorcinoxy groups with highly enhanced thermal stability of second harmonic generation

“…Physically crosslinked systems via hydrogen bonds have advantages such as homogeneity and good processability relative to chemically crosslinked systems, which suffer from significant optical loss and poor solubility. Recently we prepared novel polyurethanes containing tricyanovinylthienylresorcinol, tricyanovinylthienylcatechol, tricyanovinythiazolylazoresorcinol and nitrophenylazoresorcinol as NLO chromophores. The resulting polymers exhibit enhanced thermal stability of second harmonic generation (SHG), which stems from the stabilization of the dipole alignment of the NLO chromophores at high temperature.…”

Synthesis and nonlinear optical properties of branched pyrroline chromophores

“…But there are still some disadvantages in their practical applications, such as: the strong intermolecular electrostatic interaction, the incompatibility of the chromophores in polymers, and poor solubility in most common organic solvents. Fortunately, controlling the shape, size and conformation of the chromophores has been proved to be an effective approach for minimizing intermolecular electrostatic interaction and enhancing the poling efficiency of electro‐optic (EO) materials 3–5, 6–8.…”

Synthesis and Properties of Novel T-type Nonlinear Optical Polyurethane Containing Tricyanovinylthienyl Group with Enhanced Thermal Stability of Dipole Alignment

“…The TGA thermogram of the polymer 7 is shown in Fig. 2 24 However, the T g value is rather lower than that of the Y-type polyurethane, which is near 163 o C. 27 The TGA and DSC studies show that the decomposition temperature of the polymer 7 is higher than that of poling temperature. This indicates that corona poling at 160 o C for a short term is feasible without damaging the NLO chromophore.…”

“…Recently we reported novel Y-type NLO polyurethanes with enhanced thermal stability of second harmonic generation. [21][22][23][24][25][26][27] The resulting polymers exhibit high thermal stability of second harmonic generation (SHG), which stems from the stabilization of dipole alignment of the NLO chromophore. In this work reported here, we have prepared a novel polyurethane containing 1-(2,5-dioxyphenyl)-2-(5-(1,2,2-tricyanovinyl)-2-thienyl)ethane.…”