Edgewood Chemical Biological Center, 5183 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010, USA.
J Am Chem Soc. 2012 Jan 25;134(3):1486-9. doi: 10.1021/ja211182m. Epub 2012 Jan 13.
Metal organic frameworks (MOFs) are a leading class of porous materials for a wide variety of applications, but many of them have been shown to be unstable toward water. Cu-BTC (1,3,5 benzenetricarboxylic acid, BTC) was treated with a plasma-enhanced chemical vapor deposition (PECVD) of perfluorohexane creating a hydrophobic form of Cu-BTC. It was found that the treated Cu-BTC could withstand high humidity and even submersion in water much better than unperturbed Cu-BTC. Through Monte Carlo simulations it was found that perfluorohexane sites itself in such a way within Cu-BTC as to prevent the formation of water clusters, hence preventing the decomposition of Cu-BTC by water. This PECVD of perfluorohexane could be exploited to widen the scope of practical applications of Cu-BTC and other MOFs.
金属有机骨架（MOFs）是一类广泛应用的多孔材料，但是它们中的很多都对水不稳定。采用等离子体增强化学气相沉积（PECVD）对 1,3,5-苯三甲酸（BTC）处理得到了全氟己烷的疏水形式的 Cu-BTC。结果表明，处理后的 Cu-BTC 可以更好地耐受高湿度，甚至可以在水中浸泡，而不会受到干扰的 Cu-BTC。通过蒙特卡罗模拟发现，全氟己烷在 Cu-BTC 中以这样的方式自组装，以防止水簇的形成，从而防止 Cu-BTC 被水分解。这种全氟己烷的 PECVD 可以用来拓宽 Cu-BTC 和其他 MOFs 的实际应用范围。
