Effect of iron-iron oxide particles on the rate of isomerization of azobenzene moieties in polymeric liquid crystals at air-water interface

We have studied the effect of iron-iron oxide particles on the trans-cis isomerization of azobenzene moieties in the novel polyethylene glycol itaconate-azobenzene based side chain liquid crystalline polymer (PEGIA). Langmuir monolayers of the PEGIA molecules are spread at air-water interface, with...

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Published in:Colloid and polymer science 2021-04, Vol.299 (4), p.603-609
Main Authors: Raghavendra, Gupta, Satyam Kumar, Kumar, Bharat
Format: Article
Language:English
Subjects:
Azo compounds
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Food Science
Iron oxides
Isomerization
Liquid crystal polymers
Liquid crystals
Monomolecular films
Nanotechnology and Microengineering
Original Contribution
Physical Chemistry
Polyethylene glycol
Polymer Sciences
Soft and Granular Matter
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cited_by cdi_FETCH-LOGICAL-c356t-3834cae611c798a052e1189fb3a410f7df36aaa4694557e56bc30f8c902f0d273
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description We have studied the effect of iron-iron oxide particles on the trans-cis isomerization of azobenzene moieties in the novel polyethylene glycol itaconate-azobenzene based side chain liquid crystalline polymer (PEGIA). Langmuir monolayers of the PEGIA molecules are spread at air-water interface, with water subphase containing different concentrations of iron-iron oxide particles. The kinetics of the isomerization of azobenzene moieties in the polymer was studied by surface manometry technique. We find that the presence of iron-iron oxide particles in the subphase affects the rate constant of trans-cis photoisomerization and it decreases exponentially as a function of concentration of particles in the subphase. The critical concentration of iron-iron oxide particles above which the rate constant of photoisomerization negligibly changed was found to be about 2.468 μg cm − 3 .
doi_str_mv 10.1007/s00396-020-04776-4
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subjects Azo compounds
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Food Science
Iron oxides
Isomerization
Liquid crystal polymers
Liquid crystals
Monomolecular films
Nanotechnology and Microengineering
Original Contribution
Physical Chemistry
Polyethylene glycol
Polymer Sciences
Soft and Granular Matter
title Effect of iron-iron oxide particles on the rate of isomerization of azobenzene moieties in polymeric liquid crystals at air-water interface
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