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  • 02월 26일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제115회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis and Characterization of Highly Purified Bimetallic Nanoclusters

2015년 2월 26일 10시 42분 55초
ANAL.O-52 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 11시 : 42분
분석화학 - Oral Presentation of Young Analytical Chemists
저자 및
김민석, 이동일*
연세대학교 화학과, Korea
Bimetallic nanoclusters differ from their homometallic nanoclusters in many ways, which has become a topic of increasing interest in recent years. One major area of interest involves the study of Au25(SR)18 nanoclusters with bimetallic compositions such as Pt1Au24(SR)18, Pd1Au24(SR)18, Ag1~13Au24~12(SR)18 and Cu1~9Au24~16(SR)18 nanoclusters, where SR is thiolate ligand. Quantum-size of these nanoclusters induce distinctive quantum confinement effects, which result in unique optical and electrochemical properties. Recently we tried to synthesize highly purified Pt- and Pd-doped Au25 nanoclusters and clearly defined their optical, electronic, and catalytic properties. In our synthetic method, a mixture of Pt1Au24(C6S)18 (or Pd1Au24(C6S)18) and Au25(C6S)18 was produced via judicious control of reaction conditions and size-focusing process. Relatively short complexation time interrupted the appearance of Au25(C6S)18 and increased the production of bimetallic gold nanoclusters. The reaction product was further purified by selective decomposition of Au25(C6S)18 using H2O2 and subsequent solvent extraction, resulting in highly pure Pd1Au24(C6S)18 and Pt1Au24(C6S)18 nanoclusters. Successful syntheses of Pd1Au24(C6S)18 and Pt1Au24(C6S)18 nanoclusters were confirmed by UV-Vis absorption spectroscopy, mass spectrometry and X-ray photoelectron spectroscopy (XPS) studies.