Antagonistic Two-Color Control of Polymer Network Formation
Marco, Arnau (Universitat Autònoma de Barcelona. Departament de Química)
Villabona, Marc (Universitat Autònoma de Barcelona. Departament de Química)
Eren, Tugce Nur (Forschungzentrum Karlsruhe)
Feist, Florian (Forschungzentrum Karlsruhe)
Guirado López, Gonzalo (Universitat Autònoma de Barcelona. Departament de Química)
Sebastián Pérez, Rosa Maria (Universitat Autònoma de Barcelona. Departament de Química)
Hernando Campos, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Barner-Kowollik, Christopher (Queensland University of Technology)

Date:	2025
Abstract:	Offering high spatiotemporal resolution, dual wavelength-controlled soft matter network formation paves the way to advanced printing techniques with optimized performance. One of the most promising approaches is the antagonistic control of covalent bond-forming reactions with two colors of light, where photoexcitation with one wavelength induces a photochemical reaction, while irradiation with the other ceases it in the presence of the first color. Herein, we combine a photoactivatable diene precursor and a photoswitchable dienophile, establishing a dual-wavelength-gated cycloaddition reaction capable of controlling polymer crosslinking. Upon incorporation of the diene precursor into a methacrylate copolymer and the synthesis of a difunctional dienophile cross-linker, selective polymer network formation is promoted under sole UV illumination, while it can be efficiently suppressed with simultaneous redlight irradiation. Critically, the methodology is used for the preparation of solid polymer materials with antagonistic two-color control of their cross-linking status, ultimately allowing the fabrication of spatially patterned polymer films.
Grants:	Agencia Estatal de Investigación PID2022-141293OB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00064 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00052
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Antagonistic two-color photochemistry ; Diels-Alder cycloaddition ; Dithienylethenes ; Light-controlled polymerization ; O-methoxybenzaldehydes
Published in:	Advanced Functional Materials, Vol. 35, Issue 7 (February 2025) , art. 2415431, ISSN 1616-301X

DOI: 10.1002/adfm.202415431

9 p, 1.9 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group in Electrochemistry, Photochemistry and Organic Reactivity (GEFRO)
Articles > Research articles
Articles > Published articles