Triarylsulfonium hexafluoroantimonate

Figure 25 (a) Emission spectra at 293 K of/ac-ClRe(CO)3(4.7-Ph2-phcn) in the mixed epoxy system of bisphenol-A/novalac and DGEBA resin (0.05-mm thin film) containing a triarylsulfonium hexafluoroantimonate photoinitiator as a function of UV-irradiation time (A) 0 s, (B) 15 s, (C) 30 s, and (D) 60 s. The emission spectra are uncorrected for photomultiplier response and vertically displaced for clarity. Excitation wavelength is 420 nm in each case, (b) Plot of emission intensity at the MLCT band maximum of /ac-ClRe(CO)3(4,7-Ph2-phen) as a function of UV-irradiation time. (From Ref. 100.)... 

Figure 3.80. Two-photon induced dual-channel fluorescence image formation within a photosensitive polymer film containing 43e2 and triarylsulfonium hexafluoroantimonate as photoinduced acid generator. (From Ref. [118] with permission of the American Chemical Society.)...

Chem. Descrip. Mixed triarylsulfonium hexafluoroantimonate salts in propylene carbonate... 

The cationic UV photo-initiator (UVI) is a triarylsulfonium hexafluoroantimonate salt in propylene carbonate. This initiator can undergo photolysis to yield radical species as well as a strong acid for cationic polymerization initiation (75). The relative degrees of conversion and ring opening of the resultant polymers were obtained from the IR spectra with emphasis on the carbonyl and vinyl absorption regions. 

Recently, Versace et al. examined the effect of cationic photoinitiator in a one-step grafting process in water, efficient enough to avoid homopolymerization under UV irradiation. It has been shown that triarylsulfonium hexafluoroantimonate salts formed species able to abstract hydrogen from PHBHV surface. PHBHV surfaces were further grafted with HEMA and MAA (Fig. 6.8). 

Materials. Caprolactone polyols (Tone 0201 Mn= 530, and Tone 0305 Mn= 540), cycloaliphatic diepoxide (UVR-6105), triarylsulfonium hexafluoroantimonates (UVI-6974) were provided by Union Carbide Corporation. Surfactant L-7604 was procured from Witco Corporation. Caprolactone polyols were dried and stored with molecular sieves (4A). Tetraethyl orthosilicate (TEOS, 98 %) and xylene (99 %) were purchased from Aldrich. Xylene was purified according to reported literature [3]. Aluminum panels were purchased from Q-Panel Lab Products. All the materials were used as received unless specified otherwise. 

Aryldiazonium (ArNjZ-), diaryliodonium (Ar2I+Z ), and triarylsulfonium (Ar3S+Z ) salts, where Z is a nonnucleophilic and photostable anion such as tetrafluoroborate (BF4), hexafluoroantimonate (SbFg), and tetraperfluorophenylborate [(CgFsXB-], and... 

Only by application of the electron beam technique in connection with cationic catalysts like triarylsulfonium or diaryliodonium hexafluoroantimonates, hexa-... 

---