ChemSusChem. 2014 Feb;7(2):529-35. doi: 10.1002/cssc.201300836.
We report an efficient protocol for the synthesis of monodisperse crystals of an aluminum (Al)-based metal organic framework (MOF) while obtaining excellent control over the size and shape solely by tuning of the reaction parameters without the use of a template or structure-directing agent. The size of the hexagonal crystals of the Al-MOF can be selectively varied from 100 nm to 2000 nm by simply changing the reaction time and temperature via its nucleation-growth mechanism. We also report a self-assembly phenomenon, observed for the first time in case of Al-MOF, whereby hollow spheres of Al-MOF were formed by the spontaneous organization of triangular sheet building blocks. These MOFs showed broad hysteresis loops during the CO2 capture, indicating that the adsorbed CO2 is not immediately desorbed upon decreasing the external pressure and is instead confined within the framework, which allows for the capture and subsequent selective trapping of CO2 from gaseous mixtures.
我们报告了一种高效的合成方法，可用于制备单分散的铝（Al）基金属有机骨架（MOF）晶体，同时仅通过调整反应参数即可获得出色的尺寸和形状控制，而无需使用模板或结构导向剂。通过其成核-生长机制，Al-MOF 的六方晶的尺寸可以通过简单地改变反应时间和温度，从 100nm 到 2000nm 之间进行选择性变化。我们还报告了一种自组装现象，这是首次在 Al-MOF 中观察到的，其中 Al-MOF 的空心球体是由三角形片状结构单元自发组织形成的。这些 MOF 在 CO2 捕获过程中表现出宽滞后环，表明吸附的 CO2 不会在降低外部压力时立即解吸，而是被限制在框架内，从而允许从气体混合物中捕获和随后选择性捕获 CO2。
