Herein, we report the single-crystal X-ray diffraction analysis of supramolecular host–guest systems based on triflate-functionalized pillar[5]arenes and 1,4-dibromobutane or n-hexane. The guest molecule was stabilized inside pillar[5]arene cavity by C–H⋯π C–H⋯O interactions. These inclusion complexes were further self-assembled into networks various non-bonding interactions such as C-H⋯O, C-H⋯...

The Cover Feature shows a fullerene molecule included in nanocage constructed from anthracene and triptycene units. strong affinity the supramolecular aromatic complex is attributed to multipoint CH⋅⋅⋅π interactions between cage host spherical guest. showed higher selectivity toward C70 compared C60. More information can be found Full Paper by S. Toyota co-workers.

Viologens are among the most studied guests for cucurbit[8]uril (CB[8]) and their complexation is usually driven by bipyridyl core inclusion inside cavity to maximize both hydrophobic cation-dipole interactions. The presence of alkyl substituents on guest alters this mode, switching aliphatic chain in U-folded conformation. Herein, we report a thorough study influence length binding mode methyl...

The synthesis of a double-cavity porphyrin with interesting allosteric binding properties toward viologens (N,N'-disubstituted 4,4'-bipyridines) is described. The porphyrin host forms very strong 1:2 complexes with viologens, displaying a negative allosteric behavior. The first viologen guest binds exceptionally tight (K > 107 M-1), and the second guest binds much more weakly (DeltaDeltaG = 9-1...

The fabrication, characterisation and controlled burst release of naphthol-functionalised micellar (NFM) nanostructures, which were grafted onto gold surfaces through cucurbit[8]uril (CB[8]) mediated host-guest interactions are described. NFMs undergo a facile change in morphology from micelles to diblock copolymers in direct response to exposure to organic solvents, including tetrahydrofuran (...

We describe the use of two series of aryl-extended calix[4]pyrrole receptors bearing two and four electronically tunable phenyl groups, respectively, in their meso-positions as model systems for the quantification of CH-π interactions in solution. The "four-wall" and the "two-wall" receptors formed thermodynamically stable 1:1 complexes in acetonitrile solution with both trimethylamine N-oxide ...

In several recent studies we have observed that stepwise encapsulation of simple redox partners by weakly interacting molecular hosts can exert substantial kinetic and/or energetic effects upon thermal (self exchange) and/or optical (intervalence) electron transfer (ET) reactions.1-3 The previous studies featured encapsulation via either hydrogen bonding (ammine ruthenium guests with crown ethe...

Structural changes at the active site of an enzyme induced by binding to a substrate molecule can result in enhanced activity biological systems. Herein, we report that new hybrid ultramicroporous material sql-SIFSIX-bpe-Zn exhibits fit mechanism when exposed acetylene, C2H2. The resulting phase change affords exceptionally strong C2H2 turn enables highly selective C2H2/C2H4 and C2H2/CO2 separa...

The ability of an E-configured azobenzene guest to undergo photoisomerisation is controlled by the presence of a complementary host. Addition of base/acid allowed for a weakening/strengthening of the interactions in the divalent pseudo[2]rotaxane complex and hence could switch on/off photochromic activity.

We show an approach based on a combination of site-directed mutagenesis, NIL and multivalent host-guest interactions for the realization of engineered ordered functional arrays of purified components of the photosynthetic system, the membrane-bound LH2 complex. In addition to micrometer-scale patterned structures, we demonstrated the use of nanometer-scale hard NIL stamps to generate functional...