Novel efficient nonlinear optical azo- and azomethine polymers containing an antipyrine fragment: synthesis and characterization

Abstract

<p>Set of azo- and azomethine dyes with antipyrine fragments, including one bent shaped azomethine, its homo- and copolymers with MMA were synthesized. The materials demonstrated efficient refractive nonlinear optical response <italic>via</italic> self-action effect.</p>

Tautomeric influence on the photoinduced birefringence of 4-substituted phthalimide 2-hydroxy Schiff bases in PMMA matrix

“…This type of photoinduced conversion leads to effects of practical significance such as reversible reorientation of the chromophores, photorefractive phenomenon, reversible optical information storage, inscribing of surface relief gratings or inducing of chirality [45][46][47][48]. The molecular movement during the E/Z isomerization, which involves π-π* electron transitions, is related to the formation of anisotropic domains of the azo, azomethine and stilbene compounds making them valuable birefringent and dichroic materials [49][50][51][52][53][54]. Taking into account the properties of the illuminating light (intensity and propagation direction) on the rate of E/Z conversation according to the equation P = kIcos 2 , where k is a coefficient of proportionality, I is the intensity of the incident light and θ is the angle between the major axis of the chromophore (the chromophores themselves are anisotropic) and the electric vector of light [55,56], the studied SB's could be exploited as anisotropic materials with potential reversible optical storage effect.…”

Probing Optical Nonlinearities of Unconventional Glass Nanocomposites Made of Ionic Liquid Crystals and Bimetallic Nanoparticles

“…The Z-scan scheme with an open aperture (OA) was used for the investigation of the nonlinear absorption process in the samples. The fitting of the obtained data was performed according to the equations [ 34 , 35 ]: …”