The article Flexible pores of a metal oxide-based capsule permit entry of comparatively larger organic guests (J. Am. Chem. Soc. 2009, 131, 6380-6382), co-authored by Ayala Ziv, Alina Grego, Sivil Kopilevich, Leila Zeiri, Pere Miro, Carles Bo, Achim Müller, and Ira A. Weinstock, has been highlighted on the front-cover of the Journal of the American Chemical Society on issue 18.
In this article a remarkable phenomenon is reported: Carboxylates negotiate passage through flexible Mo9O9 pores of a 3 nm diameter “capsule-like” open-framework macro-ion that functions as a soluble analogue of a porous metal oxide. Branched-alkane-substituted carboxylate “guests” enter the host/capsule even though they are larger than the size of the capsule’s metal oxide pores.
