64  US 8,852,845 B2  63  specific preferred examples thereof include a cyclopentyl  group, a cyclohexyl group, a norbornyl group and an adaman› tyl group.  The aryl group as L$_{1 }$ and L$_{2 }$ is, for example, an aryl group  having a carbon number of 6 to 15, and specific preferred  examples thereof include a phenyl group, a tolyl group, a  naphthyl group and an anthryl group.  The aralkyl group as L$_{1 }$ and L$_{2 }$ is, for example, an aralkyl  group having a carbon number of 6 to 20, and examples  thereof include a benzyl group and a phenethyl group.  Examples of the divalent organic linking group as M  include an alkylene group (e.g., methylene, ethylene, propy› lene, butylene, hexylene, octylene), a cycloalkylene group  (e.g., cyclopentylene, cyclohexylene), an alkenylene group  (e.g., ethylene, propenylene, butenylene), an arylene group  (e.g., phenylene, tolylene, naphthylene), -S-, ---0-,  -CO-, -SO$_{2}$-,  -N(R$_{0}$)-, and a divalent linking group  formed by combining a plurality of these groups. R$_{0 }$ repre› sents a hydrogen atom or an alkyl group (for example, an  alkyl group having a carbon number of 1 to 8, specifically, a  methyl group, an ethyl group, a propyl group, an n-butyl  group, a sec-butyl group, a hexyl group or an octyl group).  The total carbon number of the divalent organic linking group  is preferably from 1 to 20, more preferably from 1 to 15, still  more preferably from 2 to 10.  Examples of the alkyl group and cycloalkyl group as Qare  the same as those of the alkyl group and cycloalkyl group of  L$_{1 }$ andL$_{2}$ .  Examples of the alicyclic group and aromatic ring group in  the alicyclic group that may contain a heteroatom and the  aromatic ring group that may contain a heteroatom, as Q,  include a cycloalky 1 group and an ary 1 group as L $_{1 }$and L$_{2}$ , and  the carbon number thereof is preferably from 3 to 15.  Examples of the heteroatom-containing alicyclic or aro› matic ring group include a group having a heterocyclic struc- ture, such as thiirane, cyclothiolane, thiophene, furan, pyr› role, benzothiophene, benzofuran, benzopyrrole, triazine,  imidazole, benzimidazole, triazole, thiadiazole, thiazole and  pyrrolidone, but the ring structure is not limited thereto and  may be sufficient if it is a structure generally called a hetero› cyclic ring ( a ring composed of carbon and heteroatom or a  ring composed ofheteroatom).  As for the 5- or 6-membered ring that may be formed by  combining at least two members out of Q, Mand Li, there is  included a case where at least two members ofQ, Mand L$_{1 }$ combine to form, for example, a propylene group or a buty› lene group, thereby forming a 5- or 6-membered ring con› taining an oxygen atom.  Each of the groups represented by L$_{1}$ ,  L$_{2}$ ,  M and Q in  formula (II) may have a substituent, and examples of the  substituent include those described above for the substituent  which R$_{36 }$to R$_{39}$ , R $_{0}$i, R$_{02}$ , R 03 , Ar andAr $_{1 }$may have. The  carbon number of the substituent is preferably 8 or less.  The group represented by -M-Q is preferably a group com› posed of 1 to 30 carbons, more preferably a group composed  of 5 to 20 carbons.  Specific examples of the repeating unit represented by  formula  (I)  are set forth below, but the present invention is not  limited thereto. 