Supramolecular Network of Triaminotriptycene and Its Water Cluster Guest: Synthesis, Structure, and Characterization of [(tatp)₄·17H₂O]_n

Abstract

A hydrated triaminotriptycene solid, [(tatp)4·17H2O] n (1) (tatp = 2,6,12-triaminotriptycene), has been obtained by solution phase crystal growth techniques. The structure established through X-ray structural analysis shows that this hydrated solid, ascribed to cubic Fd3̅ space group, Z = 8 (a = 25.56(2) Å, V = 16699(3) Å3), crystallizes in a sodalite-like tatp porous supramolecular architecture that captures a bigger-sized heptadecameric water cluster guest. This hydrated solid is rather stable, even with removal of its guest waters in ambient temperature, and exhibits an interesting light response behavior with the crystal color converting from pale yellow to brown under a xenon lamp or sunlight irradiation.

Two Zinc-Viologen Interpenetrating Frameworks with Straight and Offset Stacking Modes Respectively Showing Different Photo/Thermal Responsive Characters

“…Recently, many fascinating photosensitive systems have been developed by integrating carboxylate, phosphate, or halogen donor groups with viologen acceptor components. − Different wavelength ranges of photoresponsive and various coloration characters are observed for these photoactive devices. Among them, it is interesting to reveal that one species shows reversible photochromic character via photo/thermal stimuli, while the others display photo coloration and thermal coloration behaviors by photo/thermal stimuli toward a single direction. − In view of the fact that intermolecular interactions, such as π···π and C–H···π interactions, hydrogen bonding, and halogen bonding, play important roles in manipulating the self-assembly of building blocks and thus affect the charge/energy transfer reactions, we intend to build metal-viologen frameworks with different packing modes by a crystal engineering approach to investigate their various stimuli-responsive characters. − …”

Crystallization of a Supramolecular Coassembly of an Atomically Precise Nanoparticle with a Crown Ether

“…Six water molecules were trapped inside the cavity of these supramolecular cages (Figure S7). Similar molecular cages were also observed in the case of hexameric assemblies of resorcarenes, 35 calixarenes, 36 insulin, 37 etc., and such cages usually act as hosts for trapping guest molecules, 38 and also as molecular capsules for catalyzing certain reactions. 39 Thus, crystal structure of Ag 29 -DB18C6 may be described as a "lattice inclusion compound" or "lattice clathrate", 40 where guest molecules (crown ether hexamers) get crystallized in the In the structure of I/II, two types of host-guest interactions may be visualized: first, at the molecular level where crown ethers trap Na + and secondly, complexation of these crown ethers with the cluster, where the cluster can be considered as a colloidal-level molecule.…”

A Highly Efficient Near-Infrared-Activated Photocatalyst Based on an Electron-Deficient Copper-Viologen-Polyoxometalate Framework with a Copper {Cu3} Cluster Decorated Phosphotungstate as a Building Block

“…It is a challenge to design and synthesis efficient photocatalysts with well-defined structures and precise knowledge about the distribution of catalytically active sites. As transition metal coordination polymers (CPs) with nitrogen heterocycles as ligands are excellent candidates for light sensitizers, they have been selected to support POMs clusters recently. − These complexes have hybrid frameworks built by metal nodes and bridging ligands that enable their structures to be readily fine-tuned by crystal engineering principles. − Many visible-light-active photocatalysts are created based on CP-support POMs. , The strategy broadens the light absorption range of the catalysts from UV to Vis via the introduction of organic components. Nowadays, in view of the near-infrared light (NIR) occupying more than 50% of the solar energy, it is desired to develop NIR light responsive photocatalysts for efficient energy conversion and use. , Until now, high-efficient NIR light responsive photocatalysts based on POMs have not been well exploited for organic pollutant degradation.…”