Xiong Yujie, Xie Yi, Li Zhengquan, Wu Changzheng
Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026 P R China.
Chemistry. 2003 Apr 4;9(7):1645-51. doi: 10.1002/chem.200390189.
A new coordination-polymer-precursor route has been developed to synthesize nanowires under hydrothermal conditions. In the present work, well-aligned gamma-MnO(2) nanowires, growing along the [0 0 2] axis, have successfully been prepared by selecting an appropriate coordination polymer [Mn(SO(4))(4,4'-bpy)(H(2)O)(2)] as precursor. In comparison with the experimental results from other coordination-polymer precursors, it is found that only [Mn(SO(4))(4,4'-bpy)(H(2)O)(2)] is appropriate for the formation of gamma-MnO(2) crystal lattices during the process of oxidization. The IR absorption spectra of as-obtained precipitates at different reaction intervals minutely describe the reaction process, due to the different coordination abilities of ligands in the coordination polymer. More evidence about the mechanism will be further explored in the future study. Further observations show the ordered alignment of nanowires' tops and such well-aligned nanowires provide more possible applications in lithium batteries.
一种新的配位聚合物前驱体路线已被开发出来，用于在水热条件下合成纳米线。在目前的工作中，通过选择合适的配位聚合物[[Mn(SO₄)(4,4'-bpy)(H₂O)₂]ₙ]作为前驱体，成功制备了沿[0 0 2]轴生长的排列良好的γ-MnO₂纳米线。与其他配位聚合物前驱体的实验结果相比，发现在氧化过程中只有[[Mn(SO₄)(4,4'-bpy)(H₂O)₂]ₙ]适合形成γ-MnO₂晶格。由于配位聚合物中配体的配位能力不同，所获得的沉淀物在不同反应间隔的红外吸收光谱精确地描述了反应过程。关于该机理的更多证据将在未来的研究中进一步探索。进一步的观察表明纳米线顶部的有序排列，并且这种排列良好的纳米线在锂电池中提供了更多可能的应用。
