Thiazolothiazole compound and thiazolothiazole polymer

1. A thiazolothiazole polymer represented by the following Formula (II):

wherein each Y is the same and represents a divalent hydrocarbon group; each R 2 is the same and represents a hydrogen atom, a substituted or unsubstituted phenyl group, a substituted or unsubstituted toluoyl group, or a substituted or unsubstituted aralkyl group; each m is the same and represents an integer of from 1 to 5; p represents an integer of from 5 to 5000; and A represents a unit represented by the following Formula (III):

wherein each Ar 1 is the same and represents a substituted or unsubstituted monovalent aromatic group; n represents an integer of 0 or 1; and each (x) represents a point at which the unit represented by Formula (III) attaches to the thiazolothiazole polymer represented by Formula (II).

2. The thiazolothiazole polymer of claim 1 , wherein Ar 1 in Formula (III) represents one selected from the group consisting of: a substituted or unsubstituted phenyl group, a substituted or unsubstituted monovalent polynuclear aromatic hydrocarbon group having 2 to 20 aromatic rings, a substituted or unsubstituted monovalent condensed aromatic hydrocarbon group having 2 to 20 aromatic rings, a substituted or unsubstituted monovalent aromatic heterocyclic group, and a substituted or unsubstituted monovalent aromatic group having at least one aromatic heteroring.

3. The thiazolothiazole polymer of claim 1 , wherein Ar 1 in Formula (III) represents one selected from the group consisting of a substituted or unsubstituted phenyl group and a substituted or unsubstituted monovalent polynuclear aromatic hydrocarbon group.

4. The thiazolothiazole polymer of claim 1 , wherein Ar 1 in Formula (III) represents one selected from the group consisting of a substituted or unsubstituted phenyl group and a substituted or unsubstituted biphenylene group.

5. The thiazolothiazole polymer of claim 1 , wherein Y in Formula (II) represents one selected from the group consisting of the following Formulae (IV-1) to (IV-7):

wherein R 3 and R 4 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted aralkyl group; h and i each independently represent an integer of 1 to 5; j and q each independently represent an integer of 0 to 6; 1 and r each independently represent 0 or 1; and V represents a group selected from groups represented by the following Formulae (V-1) to (V-11):

wherein in Formulae (V-1), (V-10) and (V-11), e represents an integer of 1 to 5, and f and g each represent an integer of 0 to 5.

6. The thiazolothiazole polymer of claim 1 , having a weight-average molecular weight (Mw) of from 10,000 to 300,000.