Zheng Yao-Rong, Stang Peter J
Department of Chemistry, University of Utah, 315 South 1400 East, RM 2020, Salt Lake City, Utah 84112, USA.
J Am Chem Soc. 2009 Mar 18;131(10):3487-9. doi: 10.1021/ja809788x.
The direct observation of dynamic ligand exchange between Pt-N coordination-driven self-assembled supramolecular polygons (triangles and rectangles) has been achieved using stable (1)H/(2)D isotope labeling of the pyridyl donors and electrospray ionization mass spectrometry combined with NMR spectroscopy. Both the thermodynamic and kinetic aspects of such exchange processes have been established on the basis of quantitative mass spectral results. Further investigation has shown that the exchange is highly dependent on experimental conditions such as temperature, solvent, and the counteranions.
通过对吡啶基供体进行稳定的¹H/²D同位素标记,并结合电喷雾电离质谱和核磁共振光谱,实现了对铂-氮配位驱动的自组装超分子多边形(三角形和矩形)之间动态配体交换的直接观察。基于定量质谱结果,已经确定了这种交换过程的热力学和动力学方面。进一步的研究表明,这种交换高度依赖于温度、溶剂和抗衡阴离子等实验条件。