Triphenylsulfonium trifluoromethane

Phenyl groups show a weak absorption at 280 nm and strong absorption at 200 nm. Therefore, most PAGs show a moderate absorption at 248 nm and a strong absorption at 248 nm. Ohwa reported absorption spectra of various PAGs. Absorption coefficients of PAG estimated from their spectra are shown in Table 2.1. Triphenylsulfonium trifluoromethane... 

---