Design and preparation of novel diazo chromophores with flexible isolated groups

Abstract

Novel nonlinear optical chromophore with strong electron donor, diazo electron bridge and isolation groups on both sides were synthesized and characterized by mass spectrum and hydrogen nuclear magnetic resonance. Strong electron donor and diazo electron bridge improve the nonlinear optical activities of the chromophore, large and reactive isolated groups improve the chromophore’s solubility and reduced the interaction among the chromophores. Second order nonlinear optical polymers with different chromophore loading densities were prepared and showed us the smallest glass transition temperature change. Large second order nonlinear optical coefficients were also gotten by second harmonic generation method 15.3, 27.2 and 33.4 pm/V for chromophore loading density at 10, 22.5 and 27.5 wt% respectively.