Three series of Au(I)-imidazole complexes with stoichiometries of [Au(Cn-bim)Cl], [Au(Cn-im)Cl], and [Au(Cn-im)2][NO3]·2H2O (Cn-bim = N–CnH2n+1-substituted benzimidazole and Cn-im = N–CnH2n+1-substituted imidazole) together with the compound of [Au(C18-bim)2][NO3] are synthesiszed. Typical structures of each series are determined by single crystal X-ray diffraction. The last series of compounds, are liquid crystals, and exhibit a wider mesophase range than their Ag(I) analogues. These Au(I) complexes form Au nanostructures both through chemical reduction or thermolysis. For the first time, N-long chain imidazole is utilized to stabilize colloidal Au in solution. Also for the first time, unique examples of simple thermolysis to produce large Au plates of nanothickness are demonstrated. Formation of a plate-like morphology through fusion of sphere-like nanoparticles at an early stage is evidenced by TEM images.
合成了三类Au(I)-
咪唑配合物,其
化学计量比为[Au(Cn-bim)Cl]、[Au(Cn-im)Cl]和[Au(Cn-im)2][NO3]·2H2O(Cn-bim = N–CnH2n+1取代的
苯并咪唑,Cn-im = N–CnH2n+1取代的
咪唑),以及化合物[Au(C18-bim)2][NO3]。通过单晶X射线衍射确定了每个系列的典型结构。最后一系列化合物是液晶,并且展现出比其Ag(I)类似物更宽的介观相范围。这些Au(I)配合物通过
化学还原或热解形成Au纳米结构。首次利用长链
咪唑在溶液中稳定胶体Au。同时,首次展示了简单热解法以产生纳米厚度的大Au板的独特例子。透射电子显微镜(
TEM)图像显示,早期阶段通过球形纳米粒子的融合形成了板状形态。