title: Densely Packed Hydrophobic Clustering: Encapsulated Valerates Form a High-Temperature-Stable {Mo132 } Capsule System.
abstract: Porous molecular nanocontainers of {Mo132 }-type Keplerates offer unique opportunities to study a wide variety of relevant phenomena. An impressive example is provided by the highly reactive {Mo132 -CO3 } capsule, the reaction of which with valeric acid results in the very easy release of carbon dioxide and the uptake of 24 valerate ions/ligands that are integrated as a densely packed aggregate, thus indicating the unique possibility of hydrophobic clustering inside the cavity. Two-dimensional NMR techniques were used to demonstrate the presence of the 24 valerates and the stability of the capsule up to ca. 100 °C. Increasing the number of hydrophobic parts enhances the stability of the whole system. This situation also occurs in biological systems, such as globular proteins or protein pockets.
authors.affiliation: Fakultät für Chemie, Universität Bielefeld, Postfach 100131, 33501, Bielefeld, Germany.
authors.forename: Somenath
authors.identifier: 0000-0002-3923-8089
authors.initials: S
authors.lastname: Garai
authors.affiliation: Fakultät für Chemie, Universität Bielefeld, Postfach 100131, 33501, Bielefeld, Germany.
authors.forename: Hartmut
authors.initials: H
authors.lastname: Bögge
authors.affiliation: Fakultät für Chemie, Universität Bielefeld, Postfach 100131, 33501, Bielefeld, Germany.
authors.forename: Alice
authors.initials: A
authors.lastname: Merca
authors.affiliation: Forschungszentrum Jülich GmbH, INM-5, Wilhelm-Johnen-Straße, 52425, Jülich, Germany.
authors.forename: Olga A
authors.initials: OA
authors.lastname: Petina
authors.affiliation: Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel.
authors.forename: Alina
authors.initials: A
authors.lastname: Grego
authors.affiliation: Institut Parisien de Chimie Moléculaire UMR CNRS 8232, Université Pierre et Marie Curie, Paris 06, 4 place Jussieu, 75252, Paris, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Gouzerh
authors.affiliation: Universität Hamburg, Fachbereich Chemie, Institut für Anorganische und Angewandte Chemie, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany.
authors.forename: Erhard T K
authors.identifier: 0000-0002-8615-0688
authors.initials: ET
authors.lastname: Haupt
authors.affiliation: Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel.
authors.forename: Ira A
authors.identifier: 0000-0002-6701-2001
authors.initials: IA
authors.lastname: Weinstock
authors.affiliation: Fakultät für Chemie, Universität Bielefeld, Postfach 100131, 33501, Bielefeld, Germany. a.mueller@uni-bielefeld.de.
authors.forename: Achim
authors.identifier: 0000-0003-0117-4021
authors.initials: A
authors.lastname: Müller
keywords: NMR spectroscopy; confinement effects; dense packing; hydrophobic interactions; porous capsules