Abstract
Photoisomerisation of Irgacure PAG 103 followed by photocyclisation and fragmentation leads to three tricyclic thieno[2,3-b]quinoline-4-carbonitrile heterocyclic compounds. The release of acid which can catalyse polymer resist modifications is indicated by the low pH of an aqueous extract. These reactions are discussed in view of possible mechanisms and how these might influence future design strategies.
Original language | English |
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Pages (from-to) | 19875-19879 |
Number of pages | 5 |
Journal | ACS Omega |
Volume | 4 |
Issue number | 22 |
Early online date | 12 Nov 2019 |
DOIs | |
Publication status | Published - 26 Nov 2019 |
Bibliographical note
AcknowledgmentsWe are grateful to BASF (Cheadle UK) for the donation of Irgacure PAG 103, the UK National Mass Spectrometry Service, and the UK National Crystallography Service.
Keywords
- Irgacure PAG 103
- chemical amplification
- photoacid generator
- oxime sulfonate
- DESIGN
- CHEMICAL AMPLIFICATION RESISTS
- CONTAINED PHOTOACID GENERATOR
- PHOTOCYCLIZATION
- CATIONIC-POLYMERIZATION