126795 20241125101141.0 doi 10.1002/admt.202300571 sideral 134127 ART-2023-134127 eng Royo, Raquel Universidad de Zaragoza Highly Efficient Photoninitiators Based on 4H-Pyranylidene Derivatives for Two-Photon Laser Printing 2023 Access copy available to the general public Unrestricted A series of four donor–acceptor–donor derivatives bearing 4H-pyranylidene and 4-methylcyclohexan-1-one units as donor and acceptor groups respectively is designed, synthesized, and photophysically characterized. Both experimental and theoretical studies reveal good two-photon absorption (2PA) properties for these systems. Decoration of the exocyclic position of the 4H-pyranylidene moiety with a thiophene ring results in high 2PA cross-section values (σ2PA) ≈700 nm, and remarkably, in the region between 900 and 1000 nm. Furthermore, all chromophores are evaluated as photoinitiators (PIs) for two-photon-laser printing at 780 nm, showing superior performance compared to the commonly used commercially available PI, phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide. Among the studied PIs, the ones equipped with a thiophene unit at the exocyclic position of the 4H-pyranylidene moiety exhibit the highest efficiency, enabling fast printing using low laser powers with even lower concentrations of PI. Overall, this study shows the great potential of this new class of PIs for application in the field of 3D nanoprinting. info:eu-repo/grantAgreement/ES/DGA/E47-20R info:eu-repo/grantAgreement/ES/DGA/E47-23R info:eu-repo/grantAgreement/ES/MICINN/PID2019-104293GB-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2019-104307GB-I00-AEI-10.13039-501100011033 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 6.4 2023 MATERIALS SCIENCE, MULTIDISCIPLINARY 100 / 439 = 0.228 2023 Q1 T1 1.694 2023 Industrial and Manufacturing Engineering 2023 Q1 Mechanics of Materials 2023 Q1 Materials Science (miscellaneous) 2023 Q1 10.2 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Mainik, Philipp Benitez-Martin, Carlos Andreu, Raquel Universidad de Zaragoza (orcid)0000-0002-3206-9868 Blasco, Eva Najera, Francisco Villacampa, Belén Universidad de Zaragoza (orcid)0000-0001-9814-0834 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 8, 23 (2023), 2300571 [10 pp.] Adv. Mater. Technol. Advanced Materials Technologies 2365-709X 1511934 http://zaguan.unizar.es/record/126795/files/texto_completo.pdf Versión publicada 2438929 http://zaguan.unizar.es/record/126795/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:126795 articulos driver 2024-11-22-12:02:43 ARTICLE