fr
Article scientifique
Accès libre
Anglais

Beyond the Threshold: A Study of Chalcogenophene-Based Two-Photon Initiators

Publié dansChemistry of materials, vol. 34, no. 7, p. 3042-3052
Date de publication2022-03-22
Date de mise en ligne2022-03-22
Résumé

A series of nine soluble, symmetric chalcogenophenes bearing hexyl-substituted triphenylamines, indolocarbazoles, or phenylcarbazoles was designed and synthesized as potential two-photon absorption (2PA) initiators. A detailed photophysical analysis of these molecules revealed good 2PA properties of the series and, in particular, a strong influence of selenium on the 2PA cross sections, rendering these materials especially promising new 2PA photoinitiators. Structuring and threshold tests proved the efficiency and broad spectral versatility of two selenium-containing lead compounds as well as their applicability in an acrylate resin formulation. A comparison with commercial photoinitiators Irg369 and BAPO as well as sensitizer ITX showed that the newly designed selenium-based materials TPA-S and TPA-BBS outperform these traditional initiators by far both in terms of reactivity and dose. Moreover, by increasing the ultralow concentration of TPA-BBS, a further reduction of the polymerization threshold can be achieved, revealing the great potential of this series for application in two-photon polymerization (2PP) systems where only low laser power is available.200020-184607

eng
Groupe de recherche
Citation (format ISO)
LUNZER, Markus et al. Beyond the Threshold: A Study of Chalcogenophene-Based Two-Photon Initiators. In: Chemistry of materials, 2022, vol. 34, n° 7, p. 3042–3052. doi: 10.1021/acs.chemmater.1c04002
Fichiers principaux (1)
Article (Published version)
Identifiants
ISSN du journal0897-4756
129vues
117téléchargements

Informations techniques

Création27.04.2022 14:04:00
Première validation27.04.2022 14:04:00
Heure de mise à jour16.03.2023 06:25:51
Changement de statut16.03.2023 06:25:50
Dernière indexation12.02.2024 12:22:16
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack