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Issue 26, 2020
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Novel efficient nonlinear optical azo- and azomethine polymers containing an antipyrine fragment: synthesis and characterization

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Abstract

A set of new methacrylate monomers based on azobenzene/azomethine moieties coupled with an antipyrine heterocyclic fragment was designed. Their free radical polymerization provided six homo-/copolymers with photoactive side chains. These novel materials were characterized with NMR, IR and UV-vis spectroscopies, as well as DSC and SEC. Their THF solutions demonstrated an efficient refractive nonlinear optical (NLO) response with an optical quality factor, FOM, of 102 – 2 × 103via self-action of single picosecond range laser pulses at a wavelength of 532 nm. Their efficiency enhances in the following set of chromophores: azomethine < azo < bis-azomethine. The polymers exhibit higher cubic hyperpolarizabilities against their corresponding initial molecules, while the fractional contribution of the photoactive group reduces. Incorporation of bis-structured units improves both the polymer properties and the NLO response efficiency of the materials. The fractional contribution of a photochromic group to the macromolecular refractive/absorptive NLO optical responses was analyzed for the first time.

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

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Article information


Submitted
02 Apr 2020
Accepted
23 May 2020
First published
25 May 2020

J. Mater. Chem. C, 2020,8, 9032-9045
Article type
Paper

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

V. M. Ovdenko, V. V. Multian, A. V. Uklein, I. V. Kulai, O. Yu. Kolendo and V. Ya. Gayvoronsky, J. Mater. Chem. C, 2020, 8, 9032
DOI: 10.1039/D0TC01657H

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