▎ 摘　　要

NOVELTY - A phenylboronic acid-modified polymerized ionic liquid is prepared by performing chloropropene substitution reaction with polypyrrole/graphene oxide composite, obtaining chloropropene/polypyrrole/graphene oxide composite, polymerizing the surface of the chloropropene/polypyrrole/graphene oxide composite using N-vinylimidazole monomer and azobisisobutyronitrile, obtaining poly(N-vinylimidazole)-modified polypyrrole/graphene oxide composite nanosheets, and performing substitution reaction with 4-bromomethylbenzeneboronic acid. USE - Phenylboronic acid-modified polymerized ionic liquid is used in preparation of electrochemical sensor in simultaneous identification and detection of acetaminophen and dopamine (all claimed). ADVANTAGE - The phenylboronic acid-modified polymerized ionic liquid enables efficient identification and detection of acetaminophen and dopamine with excellent stability and sensitivity. DETAILED DESCRIPTION - A polypyrrole/graphene oxide composite is prepared by mixing graphene oxide prepared by Hummer's method, and pyrrole monomer, such that graphene oxide and pyrrole monomer are bonded through hydrogen bonds, to obtain polypyrrole/graphene oxide composite, performing substitution reaction with chloropropene, obtaining chloropropene/polypyrrole/graphene oxide composite, performing polymerization reaction on the surface of the chloropropene/polypyrrole/graphene oxide composite using N-vinylimidazole as a monomer and azobisisobutyronitrile as an initiator, obtaining poly(N-vinylimidazole)-modified polypyrrole/graphene oxide composite nanosheets, and performing substitution reaction with 4-bromomethylbenzeneboronic acid. INDEPENDENT CLAIMS are included for the following: (1) usage method of phenylboronic acid-modified polymerized ionic liquid in detection of acetaminophen and dopamine, which involves ultrasonically dispersing the phenylboronic acid-modified polymerized ionic liquid in ethanol, then applying the resultant solution on an electrode, and obtaining modified electrode used in detection of acetaminophen and dopamine.