Artificial cells:: Temperature-dependent, reversible Li+-ion uptake/release equilibrium at metal oxide nanocontainer pores
Artificial cells:: Temperature-dependent, reversible Li+-ion uptake/release equilibrium at metal oxide nanocontainer pores
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DOI：
10.1002/anie.200453762
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发表时间：
2004-01-01
影响因子：
16.6
通讯作者：
Heinze-Brückner, G
中科院分区：
文献类型：
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作者：
Müller, A;Rehder, D;Heinze-Brückner, G
在此，我们报道了这种类型的胶囊在溶液中的稳定性和使用/适用性(关于不同配体的胶囊在不同溶剂中的相对稳定性的详细信息将在稍后公布)。还显示了一个依赖于温度的平衡过程，该过程涉及通过胶囊孔和通道吸收/释放Li+离子。这些结果为临床化学研究中锂离子的转运过程提供了一定的模型。通过对组成上述胶囊骨架的化合物2溶液的~7Li核磁共振光谱分析，研究了Li+离子的吸收/释放。在[(CH3)2NH2]+阳离子的存在下，用Li2SO4处理1的水溶液(使化合物可溶于DMSO)，得到了化合物2，其特征通过元素分析、热重分析(以确定结晶水的量)、火焰光度法(以确定Li+阳离子的数目)、氧化还原滴定(以确定MOV中心的数目)、光谱分析(IR、拉曼、UV/Vis)以及X射线单晶结构分析[4](包括键价和计算)和7Li核磁共振光谱[5]来表征。
Herein, we report the stability and the use/applicability of this type of capsule in solution (details about the relative stabilities of capsules with different ligands in different solvents will be published later). A temperature-dependent equilibrium process that involves the uptake/release of Li+ ions through the capsule pores and channels is also shown to be present. The results bear some relation as a model for Li+-ion transport processes in clinical chemistry research. The uptake/release of Li+ ions was studied by 7Li NMR spectroscopic analysis of solutions of compound 2, which comprises the capsule skeleton mentioned earlier. Treatment of an aqueous solution of 1 with Li2SO4 in the presence of [(CH3) 2NH2]+ cations (to render the compound soluble in DMSO) led to the formation of compound 2, which was characterized by elemental analysis, thermogravimetry (to determine the amount of water of crystallization), flame photometry (to determine the number of Li+ cations), redox titrations (to determine the number of MoV centers), spectroscopy (IR, Raman, UV/Vis), as well as X-ray singlecrystal structure analysis [4](including bond valence sum calculations), and 7Li NMR spectroscopy.[5]