Cyclic Oxothiomolybdates: Building Blocks for Cyclodextrin-Based Open Frameworks.

Desolvation processes, though common in self-assembled biological structures, are rarely evidenced and utilized in the design of crystalline architectures. In this study, we introduce a novel approach using the [MoSO(OH)(guest)] complex, formed by the self-condensation of four [Mo OS] fragments around a guest unit (MoOH or oxalate), as a chaotropic scaffold for crystallizing hybrid organic-inorganic systems with natural cyclodextrins. Our findings reveal that β-cyclodextrin (β-CD) facilitates the formation of host-guest complexes, while α-cyclodextrin (α-CD) induces the formation of a Kagome-type structure with significant voids.

Gigantic supramolecular assemblies built from dynamic hierarchical organization between inorganic nanospheres and porphyrins.

Noncovalent ionic interactions between nanosized Keplerate-type capsules {Mo} and tetra-cationic porphyrins have been investigated in aqueous solution using small-angle X-ray scattering, H NMR and photophysical methods. These complementary multiscale methods reveal the formation of large hybrid oligomers built from a short-range organization in which the cationic porphyrin is glued onto the large POM surface. The local structuring appears to be strongly dependent on the dye : {Mo} ratio changing the morphology of the oligomers from linear to dense aggregates.