Chemistry of nanocontainers by Stefan Kubik (auth.), Markus Albrecht, Ekkehardt Hahn (eds.)

By Stefan Kubik (auth.), Markus Albrecht, Ekkehardt Hahn (eds.)

Molecular Cages and tablets with Functionalized internal Surfaces, through Stefan Kubik. Drug supply by means of Water-Soluble Organ metal Cages, by way of Bruno Therrien. Reversibly increased Encapsulation Complexes, through Dariush Ajami und Julius Rebek. box Molecules in accordance with Imine kind Ligands, by way of A. Carina Schulze und Iris M. Oppel. Molecular pills Derived from Resorcin[4]arenes via Metal-Coordination, by means of Tobias Schröder, Satya Narayan Sahu und Jochen Mattay. Coronates, round packing containers, Bowl-Shaped Surfaces, Porous 1D-, 2D-, 3D-Metallo-Coordination Polymers, and Metallodendrimers, via Rolf W. Saalfrank und Andreas Scheurer.

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Particularly stable complexes are formed with ammonium sulfate salts even in relative polar media (CD3OD/ CDCl3 3:1), but chloride ions can also induce the formation of such complexes Molecular Cages and Capsules with Functionalized Inner Surfaces 29 albeit only in CDCl3. In the absence of cations that can be bound inside the calixarene cavities, no interaction between anions and 39 was observed, demonstrating the importance of ion-pairing for complex stabilization. A self-assembling molecular capsule with inwardly directed hydrogen bond acceptors and donors composed of two identical resorcarene derivatives with phenylalanine residues on each aromatic subunit, L-40, was recently reported by Kuberski and Szumna [87].

Among other metal carbonyl derivatives, the reaction of Ru3(CO)12 with dicarboxylic acid leads, after addition of axial ligands, to cage-like macrocycles, tetranuclear loops, hexanuclear triangles or octanuclear squares, depending on the nature of the dicarboxylato spacers [22]. Molecular triangles are obtained using terephthalic acid [23] or 4,40 -diphenyldicarboxylic acid [24], while squares are isolated with oxalic acid [25] (Fig. 7a). 1 A space of its triangular structure (Fig. 7b). Using a directional bonding approach, Stang and coworkers have prepared a series of dinuclear organometallic clips from platinum metal atoms coordinated to s-bonded acetylene derivatives to generate, after addition of two tridentate ligands, organometallic metalla-prisms of different cavity sizes [26].

Mainly employed in catalysis [29], half-sandwich complexes are now being extensively evaluated as anticancer agents [30], and they have also been used to generate metalla-assemblies [31]. 42 B. Therrien 4 Organometallic Metalla-Assemblies Composed of Half-Sandwich Complexes In analogy to the three carbonyl groups in the fac-Re(CO)3 unit, Z5-cyclopentadienyl and Z6-arene ligands can be used to control accessibility of the remaining coordination sites of an octahedral metal centre. The aromatic ligand occupies three of the six coordination sites at the metal centre, and the resulting coordination geometry is pseudo-tetrahedral, thus allowing better control of the synthesis of two- or three-dimensional assemblies.

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