Aromatic sulfonium salt compound, photo-acid generator comprising the same and photopolymerizable composition containing the same, resin composition for optical three-dimensional shaping, and method of optically forming three-dimensional shape

An aromatic sulfonium salt compound expressed by a general formula (I),

• wherein, R1 to R17 are identical or different and are a group selected from the group consisting of hydrogen, halogen, nitro, hydroxyl, alkyl, alkoxy, acyl, phenoxy, ester, aryl, thioether, thiocarbonyl, sulfinyl, sulfonyl, amino, amide, imide, nitrile, phosphino, phospho, phosphoryl and fluoroalkyl groups of 1-8 carbon atoms,
• wherein the moieties other than the functional groups of these groups can be saturated aliphatic hydrocarbon, unsaturated aliphatic hydrocarbon, alicyclic hydrocarbon, carbocyclic aromatic hydrocarbon or heterocyclic aromatic hydrocarbon of 1-12 carbon atoms, and R5 and R6 can be condensed together with to form a covalent bond, provided that R1 to R5 are not all hydrogen at the same time, and that R6 to R10 are not all hydrogen at the same time, X is the same described above, and
• wherein at least one of R1 to R17 is acyl group having of the formula R—CO— or Ar—CO—, where
• Ar is
• and R is straight or branched alkyl group, or alicyclic hydrocarbon group, and R18 to R63 are identical or different, respectively hydrogen. halogen, hydroxyl, alkyl or alkoxy.