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대한화학회 제124회 학술발표회 및 총회 Peroxidase-mimetic catalytic activity of dendrimer-encapsulated Pt nanoparticles for bioanalyses

등록일
2019년 8월 22일 12시 50분 23초
접수번호
1078
발표코드
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발표시간
목 09시 : 00분
발표형식
구두발표
발표분야
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
공동저자
Youngwon Ju, Joohoon Kim*
Department of Chemistry, Kyung Hee University, Korea
In this presentation, we present the peroxidase-mimetic activity of dendrimer-encapsulated Pt nanoparticles (Pt DENs) for H2O2-mediated oxidation of chromogenic substrates and enhanced chemiluminescence (CL) of luminol/H2O2. Specifically, we found that Pt DENs exhibit peroxidase-like activity catalyzing the H2O2-mediated oxidation of 3,3’5,5’-tetramethylbenzidine (TMB) to blue-colored products. We also synthesized Pt DENs having different sizes with sub-nanometer accuracy by adjusting the stoichiometry between the dendrimer and complexed precursor Pt ions. The Pt DENs exhibited size-dependent catalytic activity for the highly enhanced CL of the luminol/H2O2 due to the peroxidase-like activity of Pt DENs. The size-dependent catalytic activity of Pt DENs was ascribed to the different chemical states of the Pt DENs as well as to their different surface areas depending on their sizes. A brief description of how the peroxidase-mimetic catalytic activities of Pt DENs could be utilized for various analytical applications is also provided.
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