| Budget Amount *help |
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2016: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
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| Outline of Final Research Achievements |
We found that amphiphilic block copolymer (PEG-b-DPA) composed of poly(ethylene glycol) (PEG) as hydrophilic segment and 2,2-dipicolylamine (DPA) as hydrophobic and metal-coordination segment can be highly stable template for synthesizing platinum (Pt) NPs. PEG-b-DPA-Pt(II) obtained by the complexation with K2PtCl4 self-assembled into micelles with partially-localized Pt(II) in micelle core. The following reduction of Pt (II) provided homogeneously distributed Pt NPs (1-2 nm) in micelle (PEG-b-DPA-Pt(NPs)).
The significantly high redox-activity of PEG-b-DPA-Pt(NPs) promoted the spontaneous reduction of Ag ions. Elemental analysis suggested the formation of core-shell type (Pt@Ag) bimetallic NPs. These results suggested that the improved redox-activity by the combination of PEG-b-DPA with Pt NPs was attributed to the interchange of redox-active species between DPA and Pt NPs. Furthermore, redox activity of the Pt@Ag NPs was studied from chemical and biological view points.
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