Premium
Molecular Engineering of UV/Vis Light‐Emitting Diode (LED)‐Sensitive Donor–π–Acceptor‐Type Sulfonium Salt Photoacid Generators: Design, Synthesis, and Study of Photochemical and Photophysical Properties
Author(s) -
Wu Xingyu,
Jin Ming,
Xie Jianchao,
Malval JeanPierre,
Wan Decheng
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201703414
Subject(s) - sulfonium , photochemistry , chemistry , absorption spectroscopy , electron acceptor , conjugated system , absorption (acoustics) , acceptor , salt (chemistry) , light emitting diode , irradiation , electron donor , polymer chemistry , materials science , organic chemistry , optoelectronics , catalysis , polymer , optics , physics , nuclear physics , composite material , condensed matter physics
A series of donor–π–acceptor‐type sulfonium salt photoacid generators (PAGs) were designed and synthesized by systematically changing electron‐donating groups, π‐conjugated systems, electron‐withdrawing groups, and the number of branches through molecular engineering. These PAGs can effectively decompose under UV/Vis irradiation from a light‐emitting diode (LED) light source because of the matching absorption and emitting spectra of the LEDs. The absorption and acid‐generation properties of these sulfonium salts were elucidated by UV/Vis spectroscopy and so forth. Results indicated that the PAG performance benefited from the introduction of strong electron‐donating groups, specific π‐conjugated structures, certain electron‐withdrawing groups, or two‐branched structures. Most sulfonium salts showed potential as photoinitiators under irradiation by a wide variety of UV and visible LEDs.