金纳米簇的合成与性质的研究

发布时间：2018-05-29 02:35

本文选题：Au_6纳米簇 + Au_8纳米簇　；参考：《长春理工大学》2017年硕士论文

【摘要】：金纳米簇作为一种新型材料备受研究者的关注。纳米簇是指尺寸小于2nm,原子个数在200左右、基团保护的、具有精确原子个数的纳米粒子。纳米簇的结构与传统的金纳米粒子完全不同,传统纳米粒子采取面心立方结构,具有表面等离子共振效应。对于纳米簇来说,其表面等离子共振效应消失,电子能带由连续的导带变成非连续的能带。因此纳米簇表现出量子效应和独特的化学和物理性质。本文主要合成了不同尺寸的金纳米簇,并且探索不同尺寸金纳米簇之间的转换关系。主要内容如下:一、室温条件,用比较简单的方法成功合成双膦配体保护的Au_6纳米簇、Au_8纳米簇和Au_(11)纳米簇。所制备的几种金纳米簇的纯度均通过二维线性离子阱静电场轨道肼组合式高分辨质谱仪和紫外-可见分光光度计等手段来进行表征。二、研究了在室温下,控制氧化/还原条件实现[Au_6(dppp)_4]~(2+)纳米簇和[Au_8(dppp)_4Cl_2]~(2+)纳米簇之间的可逆转换过程,本文不仅提供[Au_6(dppp)_4]~(2+)纳米簇和[Au_8(dppp)_4Cl_2]~(2+)纳米簇之间的关系,也为控制不同金簇结构的演变提供了一个方法。为研究纳米簇之间的转换提供简单可行的方法。三、Au_6纳米簇在加热条件下,在没有任何配体存在的条件下,通过刻蚀Au_6纳米簇而得到Au_(11)纳米簇。此外,在室温条件下,通过还原剂还原Au_(11)纳米簇得到了Au_6纳米簇。进而实现Au_6纳米簇与Au_(11)纳米簇之间的可逆转换。
[Abstract]:As a new material, gold nanoclusters have attracted much attention. Nanoclusters are nanoparticles whose size is less than 2 nm, the number of atoms is about 200 and the number of atoms is accurate. The structure of the nanoclusters is completely different from that of the traditional gold nanoparticles. The traditional nanoparticles have a face-centered cubic structure and have a surface plasmon resonance effect. For nanoclusters, the surface plasmon resonance effect disappears and the electron band changes from a continuous conduction band to a discontinuous band. Therefore, nanoclusters exhibit quantum effects and unique chemical and physical properties. In this paper, gold nanoclusters of different sizes have been synthesized and the conversion relationship between different sizes of gold nanoclusters has been explored. The main contents are as follows: 1. At room temperature, the Au_6 nanoclusters protected by bisphosphine ligands have been successfully synthesized by using a relatively simple method. The purity of the gold nanoclusters was characterized by two-dimensional linear ion trap electrostatic field orbital hydrazine combination mass spectrometer and UV-Vis spectrophotometer. Secondly, the reversible conversion process between [Au_6(dppp)_4] Nano clusters and [Au_8(dppp)_4Cl_2] Nano clusters at room temperature is studied by controlling the redox / reduction conditions. The relationship between [Au_6(dppp)_4] Nano clusters and [Au_8(dppp)_4Cl_2] Nano clusters is not only provided in this paper. It also provides a method for controlling the evolution of different gold clusters. It provides a simple and feasible method for studying the conversion between nanoclusters. Au_6 nanoclusters were prepared by etching Au_6 nanoclusters under heating condition and without any ligand. In addition, at room temperature, the Au_6 nanoclusters were obtained by reducing Aus _ (11) nanoclusters with reductant. The reversible conversion between Au_6 nanoclusters and Ausd / 11) nanoclusters can be realized.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O614.123;TB383.1

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