title: Tailoring chemically converted graphenes using a water-soluble pyrene derivative with a zwitterionic arm for sensitive electrochemiluminescence-based analyses.
abstract: We report a method to tailor chemically converted graphenes (CCGs) using a water-soluble pyrene derivative (1) with a zwitterionic arm, and the feasibility of the tailored CCGs to sensitive electrochemiluminescence (ECL)-based analyses. The compound 1 serves the dual purpose of improving the dispersion of the CCGs in aqueous solutions and further tailoring the catalytic activity of the CCGs with dendrimer-encapsulated catalytic nanoparticles. As a model system, we conjugated dendrimer-encapsulated Pt nanoparticles to the 1-functionalized CCGs on indium tin oxide (ITO) electrodes. The resulting ITOs exhibited significantly increased ECL emission of the luminol/H2O2ECL system; i.e. two orders-of-magnitude enhancement in the ECL compared to that obtained from bare ITOs, which allowed a ca. 154 times more sensitive ECL-based analysis of cholesterol using the modified ITOs compared with the use of bare ITOs.
authors.affiliation: Department of Chemistry, Kyung Hee University, Seoul 130-701, Republic of Korea.
authors.forename: Jihye
authors.initials: J
authors.lastname: Kwon
authors.affiliation: Department of Chemistry, Kyung Hee University, Seoul 130-701, Republic of Korea.
authors.forename: Seo Kyoung
authors.initials: SK
authors.lastname: Park
authors.affiliation: Department of Chemistry, Kyung Hee University, Seoul 130-701, Republic of Korea.
authors.forename: Yongwoon
authors.initials: Y
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Kyung Hee University, Seoul 130-701, Republic of Korea. Electronic address: leejs70@khu.ac.kr.
authors.forename: Je Seung
authors.initials: JS
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Kyung Hee University, Seoul 130-701, Republic of Korea; KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 130-701, Republic of Korea. Electronic address: jkim94@khu.ac.kr.
authors.forename: Joohoon
authors.initials: J
authors.lastname: Kim
mesh_terms: D015374:Biosensing Techniques / Q000379:methods; D002784:Cholesterol / Q000032:analysis*; D050091:Dendrimers / Q000737:chemistry; D055664:Electrochemical Techniques / Q000379:methods; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D008165:Luminol / Q000737:chemistry*; D008958:Models, Molecular; D053758:Nanoparticles / Q000737:chemistry; D011721:Pyrenes / Q000737:chemistry*; D012995:Solubility; D017971:Tin Compounds / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D050091:Dendrimers; D049408:Luminescent Agents; D011721:Pyrenes; D017971:Tin Compounds; D014867:Water; D008165:Luminol; C109984:indium tin oxide; D006108:Graphite; D002784:Cholesterol; C030984:pyrene; D006861:Hydrogen Peroxide
keywords: Chemically converted graphene; Electrochemiluminescence; Indium tin oxide; Pyrene