US 2020/0401045 Al  4  Dec. 24, 2020  -continued  (A5)  (Ql)  (Q2)  (Q3)  (Q4)  (Q5)  (Q6)  (Q7)  [0068]  In (Al) to  (AS),  T 11  represents a single bond, a  divalent hydrocarbon ring group, or a divalent heterocyclic  group, TI $^{2 }$represents a trivalent hydrocarbon ring group or  a trivalent heterocyclic group, TI $^{3 }$represents a tetravalent  hydrocarbon ring group or a tetravalent heterocyclic group,  TI 4  represents a pentavalent hydrocarbon ring group or a  pentavalent heterocyclic group, and TI $^{5 }$represents a hexava› lent hydrocarbon ring group or a hexavalent heterocyclic  group.  [0064]  L  11  represents a single bond or an m+ 1-valent  linking group.  [0069]  The hydrocarbon ring group may be an aromatic  hydrocarbon ring group or an aliphatic hydrocarbon ring  group. The number of carbon atoms included in the hydro› carbon ring group is preferably 6 to 18, and more preferably  6  to 14.  [0071]  In addition, in (Al) to  (AS),  L$^{2}$I to L  40  each  independently represent a single bond or a divalent linking  group.  (Al)  (A2)  (A3)  (A4)  [0077]  y 11 - represents a group selected from the group  consisting of anionic functional groups represented by Gen› eral Formulae (Yl) to (YS).  [0076]  The alkylene group, the alkenylene group, and  the alkynylene group represented by each ofL $^{2}$I to L  40  may each have a substituent. As the substituent, a  halogen atom is preferable, and a fluorine atom is more  preferable.  [0075]  The alkynylene group preferably has 2 to 10  carbon atoms, more preferably has 2 to 6 carbon atoms,  and still more preferably has 2 to 4 carbon atoms.  [0074]  The alkenylene group preferably has 2 to 10  carbon atoms, more preferably has 2 to 6 carbon atoms,  and still more preferably has 2 to 4 carbon atoms.  [0073]  The alkylene group preferably has 1 to 10 carbon  atoms, more preferably has 1 to 6 carbon atoms, and  still more preferably has 1 to 4 carbon atoms.  [0072]  Examples of the divalent linking group repre› sented by each of L $^{2}$I to L  40  include -N N-,  ---0-, -S-,  -NRa-,  -CO-, an alkylene group  (which may be in any of cyclic, branched, and linear  forms), an alkenylene group, an alkynylene group, or a  divalent group formed by combination of these groups.  Ra  represents a hydrogen atom or a substituent (for  example, an alkyl group).  [0070]  The heterocyclic group may be either an aro› matic heterocyclic group or an aliphatic heterocyclic  group. The heterocycle is preferably a 5- to IO-mem› bered ring, more preferably a 5- to 7-membered ring,  and still more preferably a 5- or 6-membered ring, each  of which has at least one N atom, 0 atom, S atom, or  Se atom in the ring structure.  [0067]  The LsI is preferably an alkyl group having 1 to  20 carbon atoms (which may be in any of linear,  branched, and cyclic forms).  [0066]  It should be noted that in a case where y 11 - which will be described later is an anionic functional  group represented by General Formula (Y) which will  be described later, L$^{11 }$represents *I----CO-O-LsI_*2.  LsI represents a divalent linking group which includes  no -O----CO-. Further, in a case where  y 11 - which  will be described later is an anionic functional group  represented by General Formula (Y2) which will be  described later, L $^{11 }$includes neither a phenylene group  nor a lactone structure.  [0065]  The m+l-valent linking group represented by  L  11  is not particularly limited, and examples thereof  include groups represented by (Al) to (A). Further, in  (Al) to (A), *I represents a bonding position to P 11 , and  *2 represents a bonding position to y 11 -.  -CH=CH2  -CH=CH-CH3  -CH=CH-C2Hs  -CH=CH-n-C3H7  -C=CH2  I  CH3  -CH=C-CH3  I  CH3  -c==cH 