Dept. of Chemistry, Yale University, Box 208107, New Haven, Connecticut 06520-8107, USA.
J Am Chem Soc. 2009 Mar 11;131(9):3392-5. doi: 10.1021/ja809831a.
We studied Ar, Kr, CO, and N(2) going into and out of a chemically opened fullerene, 1. We measured the equilibrium constant, K(eq), for the formation of X@1. K(eq) is particularly large for Ar, probably due to the large van der Waals attraction between the Ar atom and the fullerene cage. We measured rate constants and activation energies for the unimolecular reaction X@1-->X + 1 (X = Ar, CO, N(2)). The reactions show an unusually small pre-exponential factor, probably due to the loose binding of X inside the cage.
我们研究了 Ar、Kr、CO 和 N(2)进出一个化学开启的富勒烯 1。我们测量了 X@1 的形成平衡常数 K(eq)。对于 Ar，K(eq)特别大，可能是由于 Ar 原子和富勒烯笼之间的大范德华吸引力。我们测量了 X@1 到 X + 1（X = Ar、CO、N(2)）的单分子反应的速率常数和活化能。这些反应表现出异常小的指数前因子，可能是由于 X 在笼内的松散结合。
