Department of Applied Chemistry, National Chi Nan University, No.1 University Rd., Puli, Nantou, Taiwan.
Chemistry. 2013 Aug 5;19(32):10573-9. doi: 10.1002/chem.201202161. Epub 2013 Jun 21.
Three unconventional dendrimers that contained rigid NH-triazine linkages and peripheral tert-butyl moieties were prepared by using a convergent approach and characterized by (1)H and (13)C NMR spectroscopy, mass spectrometry, and elemental analysis. Based on a thermogravimetric analysis study, these dendrimers were observed to display thermal stability at about 300 °C. The NH-triazine moiety, which possessed protonated and proton-free nitrogen sites (like the imidazole unit), displayed the capture of polarizable CO2 molecules through hydrogen-bond and/or dipole-quadrupole interactions. In addition, the adsorption of various amounts of CO2 and N2 at different pressures suggests that the dendritic pores, which arise from the stacking of the middle co-planar and rim protuberant dendrimers, Gn -N∼N-Gn (n=1-3), either swell or shrink at high pressure, thus indicating that these dendrimers may have a breathing ability.
三种非传统树状分子，它们含有刚性 NH-三嗪键和外围叔丁基部分，是通过收敛方法制备的，并通过 1H 和 13C NMR 光谱、质谱和元素分析进行了表征。基于热重分析研究，这些树状分子在约 300°C 时表现出热稳定性。NH-三嗪部分具有质子化和非质子化的氮位（如咪唑单元），通过氢键和/或偶极-四极相互作用显示出对可极化 CO2 分子的捕获。此外，在不同压力下吸附不同量的 CO2 和 N2 表明，由于中间共面和边缘突出树状分子 Gn-N∼N-Gn（n=1-3）的堆叠而产生的树状分子孔在高压下膨胀或收缩，这表明这些树状分子可能具有呼吸能力。
