Patent ID: 8822722

Claim:
A fluorescent hydrogel, which has a structure represented by the following chemical formula 1: in the chemical formula 1, X 1 and X 2 , which are optionally the same or different, are C1-30 alkylene which optionally comprises at least one substituent selected from the group consisting of —COO—, —OCO—, —CH 2 NR—, —NR—, —NRCO—, —CONR—, —SO 2 NR—, —NRSO 2 —, —O—, —S—, —SS—, —NRCOO—, —OCONR— and —CO—, in this case, R is a hydrogen atom, or substituted or unsubstituted straight or branched C1-10 alkyl, Z 2 , Z 3 and Z 4 , which are optionally the same or different, are —O— or —NR′—, in this case, R′ is a hydrogen atom, or substituted or unsubstituted straight or branched C1-10 alkyl, Q, Q′, Q″ and Q′″, which are optionally the same or different, are hydrogen atoms, hydroxy, substituted or unsubstituted straight or branched C1-10 alkyl, C2-11 acyl, substituted or unsubstituted straight or branched C1-10 alkoxy, halogen atom-containing groups, carboxyl, carboxylic acid ester, carboxylic acid amide, cyano, nitro, amino or C1-10 alkylamino, and at least one of Q and Q′, and Q″ and Q′″ optionally join together to form an aromatic ring or a heterocycle, Y 1 and Y 2 , which are optionally the same or different, are divalent organic residues which are optionally substituted, or single bonds, in this case, at least one of Y 1 and Y 2 optionally contains a structure represented by the following chemical formula 3 or the following chemical formula 4, in the chemical formula 3 and the chemical formula 4, n is 2 to 5, j is 1 to 5, m is 1 to 200, and * represents a binding point, A 1 , A 2 , A 3 and A 4 , which are optionally the same or different, are hydrogen atoms or methyl, U 1 , U 2 , U 3 and U 4 , which are optionally the same or different, are hydrogen atoms, or substituted or unsubstituted straight or branched C1-10 alkyl, D 1 and D 2 , which are optionally the same or different, are groups represented by the following chemical formula 6, in the chemical formula 6, R 1 is a hydrogen atom, or straight or branched C1-10 alkyl, in this case, R 1 optionally forms a bond with L 1 , L 2 , Z 1 or Z 2 , to which D 1 and D 2 are not bound, s is an integer from 2 to 5 and t is an integer from 1 to 200, L 1 and L 2 , which are optionally the same or different, are groups selected from the group consisting of a single bond, —U 5 —, —U 5 —NR 2 —, —U 5 —O—, —U 5 —S—, —U 5 —SS—, —U 5 —NR 2 CO—, —U 5 —CONR 2 —, —U 5 —OCO—, —U 5 —COO—, a group represented by the following chemical formula 7, and a group represented by the following chemical formula 8, in this case, U 5 is substituted or unsubstituted straight or branched C1-10 alkylene, and R 2 is a hydrogen atom, or substituted or unsubstituted straight or branched C1-10 alkyl, the molar ratio of p 1 and q 1 (p 1 :q 1 ) and the molar ratio of p 2 and q 2 (p 2 :q 2 ) are 1:50 to 1:6,000, and the molar ratio of p 1 and r 1 (p 1 :r 1 ) and the molar ratio of p 2 and r 2 (p 2 :r 2 ) are 1:5 to 1:3,000.