Exploring Aromatic S-Thioformates as Photoinitiators
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In: Polymers, Vol. 15.2023, No. 7, 1647, 04.2023.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Exploring Aromatic S-Thioformates as Photoinitiators
AU - Rieger, Paul
AU - Pueschmann, Sabrina
AU - Haas, Michael
AU - Schmallegger, Max
AU - Guedes de la Cruz, Gema del Carmen
AU - Grießer, Thomas
N1 - Publisher Copyright: © 2023 by the authors.
PY - 2023/4
Y1 - 2023/4
N2 - Thiyl radicals were generated from aromatic S-thioformates by photolysis. The corresponding photo-initiated decarbonylation allows initiating polymerization reactions in both acrylate- and thiol-acrylate-based resin systems. Compared to aromatic thiols, the introduction of the photolabile formyl group prevents undesired reactions with acrylate monomers allowing photoinitiators (PIs) with constant reactivity over storage. To demonstrate the potential of S-thioformates as PIs, the bifunctional molecule S,S′-(thiobis(4,1-phenylene))dimethanethioate (2b) was synthesized, providing reactivity under visible light excitation. Consequently, acrylate-based formulations could successfully be processed by digital light processing (DLP)-based stereolithography at 405 nm in high resolution.
AB - Thiyl radicals were generated from aromatic S-thioformates by photolysis. The corresponding photo-initiated decarbonylation allows initiating polymerization reactions in both acrylate- and thiol-acrylate-based resin systems. Compared to aromatic thiols, the introduction of the photolabile formyl group prevents undesired reactions with acrylate monomers allowing photoinitiators (PIs) with constant reactivity over storage. To demonstrate the potential of S-thioformates as PIs, the bifunctional molecule S,S′-(thiobis(4,1-phenylene))dimethanethioate (2b) was synthesized, providing reactivity under visible light excitation. Consequently, acrylate-based formulations could successfully be processed by digital light processing (DLP)-based stereolithography at 405 nm in high resolution.
KW - photochemistry
KW - photoinitiator
KW - thiol-ene
UR - http://www.scopus.com/inward/record.url?scp=85152860854&partnerID=8YFLogxK
U2 - 10.3390/polym15071647
DO - 10.3390/polym15071647
M3 - Article
AN - SCOPUS:85152860854
VL - 15.2023
JO - Polymers
JF - Polymers
SN - 2073-4360
IS - 7
M1 - 1647
ER -
