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A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser
Versatile substituted electron-deficient trichloromethylarenes can easily be synthesized and combined with a Safranine O/triarylalkylborate salt to form a highly efficient three-component photo-initiation system that starts free radical polymerization to finally form holographic gratings with a sing...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8539560/ https://www.ncbi.nlm.nih.gov/pubmed/34685280 http://dx.doi.org/10.3390/polym13203517 |
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author | Berneth, Horst Bruder, Friedrich Karl Fäcke, Thomas Hansen, Sven Kawamura, Koichi Pitzer, Lena Kern, Stephan Wewer, Brita Rölle, Thomas |
author_facet | Berneth, Horst Bruder, Friedrich Karl Fäcke, Thomas Hansen, Sven Kawamura, Koichi Pitzer, Lena Kern, Stephan Wewer, Brita Rölle, Thomas |
author_sort | Berneth, Horst |
collection | PubMed |
description | Versatile substituted electron-deficient trichloromethylarenes can easily be synthesized and combined with a Safranine O/triarylalkylborate salt to form a highly efficient three-component photo-initiation system that starts free radical polymerization to finally form holographic gratings with a single-pulsed laser. The mechanism of this photo-initiation most likely relies on an electron transfer from the borate salt into the semi-occupied HOMO of the excited dye molecule Safranine O, which after fragmentation generates an initiating alkyl radical and longer-lived dye radical species. This dye radical is most probably oxidized by the newly introduced trichloromethylarene derivative as an electron acceptor. The two generated radicals from one absorbed photon initiate the photopolymerization and form index gratings in a suitable holographic recording material. This process is purely photonic and does not require further non-photonic post treatments. |
format | Online Article Text |
id | pubmed-8539560 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-85395602021-10-24 A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser Berneth, Horst Bruder, Friedrich Karl Fäcke, Thomas Hansen, Sven Kawamura, Koichi Pitzer, Lena Kern, Stephan Wewer, Brita Rölle, Thomas Polymers (Basel) Article Versatile substituted electron-deficient trichloromethylarenes can easily be synthesized and combined with a Safranine O/triarylalkylborate salt to form a highly efficient three-component photo-initiation system that starts free radical polymerization to finally form holographic gratings with a single-pulsed laser. The mechanism of this photo-initiation most likely relies on an electron transfer from the borate salt into the semi-occupied HOMO of the excited dye molecule Safranine O, which after fragmentation generates an initiating alkyl radical and longer-lived dye radical species. This dye radical is most probably oxidized by the newly introduced trichloromethylarene derivative as an electron acceptor. The two generated radicals from one absorbed photon initiate the photopolymerization and form index gratings in a suitable holographic recording material. This process is purely photonic and does not require further non-photonic post treatments. MDPI 2021-10-13 /pmc/articles/PMC8539560/ /pubmed/34685280 http://dx.doi.org/10.3390/polym13203517 Text en © 2021 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 Berneth, Horst Bruder, Friedrich Karl Fäcke, Thomas Hansen, Sven Kawamura, Koichi Pitzer, Lena Kern, Stephan Wewer, Brita Rölle, Thomas A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser |
title | A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser |
title_full | A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser |
title_fullStr | A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser |
title_full_unstemmed | A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser |
title_short | A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser |
title_sort | new three-component photo-initiating system for visible light recording of volume holograms with single-pulsed laser |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8539560/ https://www.ncbi.nlm.nih.gov/pubmed/34685280 http://dx.doi.org/10.3390/polym13203517 |
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