Solid-phase support, ligand-binding solid-phase support, method for detecting or separating target substance, and method for producing the solid-phase support

1. A solid-phase support, formed by binding a chain polymer at least to the surface, wherein the chain polymer is a block polymer comprising a first block constituted from repetitions of a hydrophilic structural unit and a second block constituted from repetitions of a structural unit having a reactive functional group,

wherein

a content ratio of the number of moles “a” of the reactive functional group contained in the chain polymer and the number of moles “b” of the whole structural unit contained in the chain polymer, (a/b), is from 0.05 to 0.23,

a density of the chain polymer occupying the surface of the solid-phase support is 0.3 to 2.0 polymers/nm 2 ,

the reactive functional group of the structural unit of the second block is a carboxy group, and

the hydrophilic structural unit comprises a hydrophilic group of formula (1) or formula (3):

wherein in the formula (1),

R 1 and R 2 each independently represent a single bond or a divalent organic group having 1 to 10 carbons,

R 3 represents —(C═O)O − , and

R 4 and R 5 each independently represent a methyl group: or

wherein in the formula (3),

R 11 represents a hydrogen atom or a methyl group,

R 12 represents —(C═O)—O—* or —(C═O)—NR 14 —*, where * represents attachment position to R 13 , where R 14 represents a hydrogen atom, and

R 13 represents a group represented by the following formula (4),

—R 15 —OH  (4)

wherein in the formula (4), R 15 represents a divalent organic group.

2. The solid-phase support according to claim 1 , wherein the first block is a block directly binding to the surface of the solid-phase support.

3. The solid-phase support according to claim 1 , wherein a molecular weight distribution of the chain polymer is from 1.0 to 2.5.

4. The solid-phase support according to claim 1 , wherein a number average molecular weight of the chain polymer is from 1,000 to 100,000.

5. The solid-phase support according to claim 1 , which is a bead.

6. The solid-phase support according to claim 5 , which is a magnetic bead.

7. The solid-phase support according to claim 1 , wherein a content of the reactive functional group is from 1 to 300 μmol per g of solid content in the solid-phase support.

8. The solid-phase support according to claim 1 , wherein in formula (3), R 12 represents —(C═O)—NR 14 —*.

9. The solid-phase support according to claim 1 , wherein the reactive functional group is represented by the following formula (5):

wherein

R 16 represents a hydrogen atom or a methyl group,

R 17 represents —(C═O)—O—*, wherein * represents attachment position to R 18 , and R 18 represents a hydrogen atom or

an organic group represented by the following formula (6),

—R 20 —Y  (6)

wherein in the formula (6),

Y represents a carboxy group, and

R 20 represents a divalent hydrocarbon group, and where the divalent organic group is a divalent hydrocarbon group, the number of carbons is from 1 to 6.