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Photochromic spiropyran- and spirooxazine-homopolymers in mesoporous thin films by surface initiated ROMP

Krohm, F. ; Kind, J. ; Savka, R. ; Alcaraz Janßen, Marcel ; Herold, Dominik ; Plenio, H. ; Thiele, Christina Marie ; Andrieu-Brunsen, Annette (2021):
Photochromic spiropyran- and spirooxazine-homopolymers in mesoporous thin films by surface initiated ROMP. (Publisher's Version)
In: Journal of Materials Chemistry C, 4 (18), pp. 4067-4076. Royal Society of Chemistry (RSC), ISSN 2050-7526, e-ISSN 2050-7534,
DOI: 10.26083/tuprints-00019927,
[Article]

Abstract

The control of ionic permselectivity in porous films is an interesting aspect in the context of lab-on-chip devices and μ-electronics. Especially, visible light triggered ionic permselectivity control is of relevance because control by light can be maintained externally without changing internal system parameters. In addition, light is a sustainable energy source if sunlight is used. Here, we present the first mesoporous films modified with two different photochromic homopolymers by surface-initiated ring opening metathesis polymerization (SI-ROMP). Spiropyran- and spirooxazine functionalized norbornene monomers and the corresponding ROMP homopolymers are synthesized in solution and in mesopores and compared concerning their optical properties such as photochromic conversion kinetics, photostability, and the ratio of converted molecules. Optical properties are investigated using UV/VIS spectroscopy and 1H-NMR spectroscopy. Especially, spirooxazine, whose surface functionalization has not been studied in detail, shows fast switching properties and higher ratios of photochromically interconverted molecules. After grafting spiropyran- and spirooxazine norbornene homopolymers into mesopores, a slightly faster photochromic interconversion of polymers located inside the mesopores is observed compared to the solution polymers.

Item Type: Article
Erschienen: 2021
Creators: Krohm, F. ; Kind, J. ; Savka, R. ; Alcaraz Janßen, Marcel ; Herold, Dominik ; Plenio, H. ; Thiele, Christina Marie ; Andrieu-Brunsen, Annette
Origin: Secondary publication service
Status: Publisher's Version
Title: Photochromic spiropyran- and spirooxazine-homopolymers in mesoporous thin films by surface initiated ROMP
Language: English
Abstract:

The control of ionic permselectivity in porous films is an interesting aspect in the context of lab-on-chip devices and μ-electronics. Especially, visible light triggered ionic permselectivity control is of relevance because control by light can be maintained externally without changing internal system parameters. In addition, light is a sustainable energy source if sunlight is used. Here, we present the first mesoporous films modified with two different photochromic homopolymers by surface-initiated ring opening metathesis polymerization (SI-ROMP). Spiropyran- and spirooxazine functionalized norbornene monomers and the corresponding ROMP homopolymers are synthesized in solution and in mesopores and compared concerning their optical properties such as photochromic conversion kinetics, photostability, and the ratio of converted molecules. Optical properties are investigated using UV/VIS spectroscopy and 1H-NMR spectroscopy. Especially, spirooxazine, whose surface functionalization has not been studied in detail, shows fast switching properties and higher ratios of photochromically interconverted molecules. After grafting spiropyran- and spirooxazine norbornene homopolymers into mesopores, a slightly faster photochromic interconversion of polymers located inside the mesopores is observed compared to the solution polymers.

Journal or Publication Title: Journal of Materials Chemistry C
Journal Volume: 4
Issue Number: 18
Publisher: Royal Society of Chemistry (RSC)
Divisions: DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 1194: Interaction between Transport and Wetting Processes
Profile Areas
Profile Areas > Thermo-Fluids & Interfaces
07 Department of Chemistry
07 Department of Chemistry > Fachgebiet Anorganische Chemie
07 Department of Chemistry > Fachgebiet Anorganische Chemie > Organometallchemie
Date Deposited: 19 Nov 2021 13:23
DOI: 10.26083/tuprints-00019927
URL / URN: https://tuprints.ulb.tu-darmstadt.de/19927
URN: urn:nbn:de:tuda-tuprints-199275
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