| 树形分子保护下铜原子簇的制备 |
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| 引用本文： | 李国平,罗运军,徐厚才. 树形分子保护下铜原子簇的制备[J]. 无机化学学报, 2004, 20(1): 61-64 |
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| 作者姓名： | 李国平 罗运军 徐厚才 |
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| 作者单位： | 北京理工大学材料科学与工程学院,北京,100081 |
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| 基金项目： | 教育部跨世纪优秀人才基金，国防科工委基础研究计划资助项目(No.J1500E002) |
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| 摘 要： | 纳米粒子由于其独特的光、电、磁和热学性质,在基础理论和应用研究方面都引起了广泛的关注.其中过渡金属纳米粒子因在催化、磁流体等领域的应用前景而引起人们浓厚的兴趣.过渡金属纳米粒子的性质不仅与粒子的大小有关,还受其形状、均匀性、团聚状况和氧化态的影响.因此制备大小和形状可控的原子簇一直是纳米材料科学中富有挑战性的课题.自从1985年Tomalia等[1]首次用发散法合成聚酰胺-胺树形分子以来,树形分子就因其独特的结构特点而成为材料学领域研究的热点之一.
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| 关 键 词： | 树形分子 铜原子簇 模板 |
| 修稿时间： | 2003-06-18 |
Preparation of Dendrimer-Protected Copper Cluster |
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| LI Guo-Ping,LUO Yun-Jun and XU Hou-Cai. Preparation of Dendrimer-Protected Copper Cluster[J]. Chinese Journal of Inorganic Chemistry, 2004, 20(1): 61-64 |
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| Authors: | LI Guo-Ping LUO Yun-Jun XU Hou-Cai |
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| Affiliation: | School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081,School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081 and School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081 |
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| Abstract: | Because the redox potential of copper is lower,it is difficult to preparation well-stabilized copper cluster.Copper cluster which is well-stabilized,well-degree of dispersion,smaller in diameter,can be obtained in presence of dendrimer as a template and hydrazine as a reductant under air.UV-Visible absorption and transmission electron microscopy are used to study the structure and property of copper cluster.The data show that the reduced Cu does not exist as isolated atoms,but rather as cluster. Change of the pH value of solution great influences the particle size, dispersion and stability. The results show that the solution at pH 7.0±0.5, the stability and dispersion of the obtained copper cluster are too better. |
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| Keywords: | dendrimer copper cluster template |
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