US 2012/0003590 Al  97  Jan. 5, 2012  (PA-99)  (PA-100)  (PA-101)  (PA-102)  [0426]  In the present invention, a compound (PA) other  than the compound capable of generating a compound repre› sented by formula (PA-1) can be also appropriately selected.  For example, a compound that is an ionic compound and has  a proton acceptor site in the cation moiety may be used. More  specifically, examples of such a compound include a com› pound represented by the following formula (7):  [0427]  In the formula, A represents a sulfur atom or an  iodine atom.  [0428]  mrepresents 1 or 2, nrepresents 1 or 2, provided that  when A is a sulfur atom, m+n=3 and whenA is an iodine atom,  m+n=2.  [0429]  R represents an aryl group.  [0430]  RN  represents an aryl group substituted with a pro› ton acceptor functional group.  [0431]  x- represents a counter anion.  [0432]  Specific examples ofx- are the same as those ofx› in formula  (ZI).  [0433]  Specific preferred examples of the aryl group of R  and  RN  include a phenyl group.  [0434]  Specific examples of the proton acceptor functional  group contained in  RN  are the same as those of the proton  acceptor functional group described above in formula (PA-1 ).  [0435]  In the composition of the present invention, the ratio  of the compound (PA) blended in the entire composition is  preferably from 0.1 to 10 mass%, more preferably from 1 to  8 mass%, based on the entire solid content of the composi› tion.  [0436]  Other examples of the compound which can be used  in the composition of the present invention include the com- (7)  -continued  (PA-97)  (PA-98)  CQ /  j 