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Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives
Polymer films doped by different porphyrins, obtained by crystallization from the acetone solutions, differ in absorption and fluorescence spectra, which we attribute to the differences in the structuring and composition of the rotational isomers in the polymer chains. According to the infrared spec...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9920957/ https://www.ncbi.nlm.nih.gov/pubmed/36770525 http://dx.doi.org/10.3390/nano13030564 |
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author | Kochervinskii, Valentin V. Gradova, Margaret A. Gradov, Oleg V. Sergeev, Andrey I. Lobanov, Anton V. Buryanskaya, Evgeniya L. Ilina, Tatiana S. Kiselev, Dmitry A. Malyshkina, Inna A. Kirakosyan, Gayane A. |
author_facet | Kochervinskii, Valentin V. Gradova, Margaret A. Gradov, Oleg V. Sergeev, Andrey I. Lobanov, Anton V. Buryanskaya, Evgeniya L. Ilina, Tatiana S. Kiselev, Dmitry A. Malyshkina, Inna A. Kirakosyan, Gayane A. |
author_sort | Kochervinskii, Valentin V. |
collection | PubMed |
description | Polymer films doped by different porphyrins, obtained by crystallization from the acetone solutions, differ in absorption and fluorescence spectra, which we attribute to the differences in the structuring and composition of the rotational isomers in the polymer chains. According to the infrared spectroscopy data, the crystallization of the films doped with tetraphenylporphyrin (TPP) proceeds in a mixture of α- and γ-phases with TGTG(−) and T(3)GT(3)G(−) conformations, respectively. Three bonds in the planar zigzag conformation ensures the contact of such segments with the active groups of the porphyrin macrocycle, significantly changing its electronic state. Structuring of the films in the presence of TPP leads to an increase in the low-voltage AC-conductivity and the registration of an intense Maxwell-Wagner polarization. An increased conductivity by an order of magnitude in TPP-doped films was also observed at high-voltage polarization. The introduction of TPP during the film formation promotes the displacement of the chemical attachment defects of “head-to-head” type in the monomeric units into the surface. This process is accompanied by a significant increase in the film surface roughness, which was registered by piezo-force microscopy. The latter method also revealed the appearance of hysteresis phenomena during the local piezoelectric coefficient d(33) measurements. |
format | Online Article Text |
id | pubmed-9920957 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-99209572023-02-12 Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives Kochervinskii, Valentin V. Gradova, Margaret A. Gradov, Oleg V. Sergeev, Andrey I. Lobanov, Anton V. Buryanskaya, Evgeniya L. Ilina, Tatiana S. Kiselev, Dmitry A. Malyshkina, Inna A. Kirakosyan, Gayane A. Nanomaterials (Basel) Article Polymer films doped by different porphyrins, obtained by crystallization from the acetone solutions, differ in absorption and fluorescence spectra, which we attribute to the differences in the structuring and composition of the rotational isomers in the polymer chains. According to the infrared spectroscopy data, the crystallization of the films doped with tetraphenylporphyrin (TPP) proceeds in a mixture of α- and γ-phases with TGTG(−) and T(3)GT(3)G(−) conformations, respectively. Three bonds in the planar zigzag conformation ensures the contact of such segments with the active groups of the porphyrin macrocycle, significantly changing its electronic state. Structuring of the films in the presence of TPP leads to an increase in the low-voltage AC-conductivity and the registration of an intense Maxwell-Wagner polarization. An increased conductivity by an order of magnitude in TPP-doped films was also observed at high-voltage polarization. The introduction of TPP during the film formation promotes the displacement of the chemical attachment defects of “head-to-head” type in the monomeric units into the surface. This process is accompanied by a significant increase in the film surface roughness, which was registered by piezo-force microscopy. The latter method also revealed the appearance of hysteresis phenomena during the local piezoelectric coefficient d(33) measurements. MDPI 2023-01-30 /pmc/articles/PMC9920957/ /pubmed/36770525 http://dx.doi.org/10.3390/nano13030564 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kochervinskii, Valentin V. Gradova, Margaret A. Gradov, Oleg V. Sergeev, Andrey I. Lobanov, Anton V. Buryanskaya, Evgeniya L. Ilina, Tatiana S. Kiselev, Dmitry A. Malyshkina, Inna A. Kirakosyan, Gayane A. Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives |
title | Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives |
title_full | Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives |
title_fullStr | Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives |
title_full_unstemmed | Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives |
title_short | Optical and Electrophysical Properties of Vinylidene Fluoride/Hexafluoropropylene Ferroelectric Copolymer Films: Effect of Doping with Porphyrin Derivatives |
title_sort | optical and electrophysical properties of vinylidene fluoride/hexafluoropropylene ferroelectric copolymer films: effect of doping with porphyrin derivatives |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9920957/ https://www.ncbi.nlm.nih.gov/pubmed/36770525 http://dx.doi.org/10.3390/nano13030564 |
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