The present invention discloses a new class of triarylsulfonium salt photoacid generators (PAGs), which are thermally stable and can be activated by long wavelength UV or visible light. The sulfonium PAGs of the present invention are additionally soluble in monomers that can be polymerized by cationic polymerization chemistry, and mixtures of said sulfonium PAGs and monomers can be stored for long periods of time without undergoing polymerization. Furthermore, typical holographic recording media comprising one of these sulfonium PAGs, polymerizable monomer(s), a sensitizing dye, and a binder can be stored for long periods of time without exhibiting significant loss of recording sensitivity. Preferred sulfonium PAGs of the present invention are sulfonium PAGs substituted with one or more fluoro or fluoroalkyl groups.
本发明揭示了一种新型的三芳基
硫鎓盐光酸发生剂(PAGs),它们具有热稳定性并可被长波紫外线或可见光激活。本发明的
硫鎓PAGs还可溶于可以通过阳离子聚合
化学反应聚合的单体中,这些
硫鎓PAGs和单体的混合物可以长时间存储而不发生聚合反应。此外,典型的全息记录介质包括这些
硫鎓PAGs、可聚合单体、敏化
染料和粘合剂,可以长时间存储而不会显着损失记录灵敏度。本发明的优选
硫鎓PAGs是一种或多种
氟或氟烷基取代的
硫鎓PAGs。