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The solvothermal reaction of 2-nitro-[1,1′-biphenyl]-4,4′-dicarboxylic acid (H2bpdcNO2) with Zn(NO3)2·6H2O in DMF solvent does not give a functionalised variant of IRMOF-9. Single-crystal X-ray diffraction analysis shows the major initial product of this reaction, WUF-21 (WUF = Wollongong University Framework), is a porous interpenetrated diamondoid metal–organic framework (MOF) with a secondary building unit that 'doubly straps' eight bridging bpdcNO2 ligands in a distorted tetrahedral shape around an unusual pentazinc core. A second porous MOF phase (WUF-23) containing a large and novel dodecazinc secondary building unit forms in the same reaction and eventually predominates in solutions containing formate anion, which arises from the hydrolysis of DMF. Doping the starting ligand with [1,1′-biphenyl]-4,4′-dicarboxylic acid (H2bpdc) provides a facile way to grow nitro-functionalised IRMOF-9, hereafter denoted as WUF-22, where the dopant is carried through into the product. Activated WUF-22 is a microporous solid with an apparent Brunauer–Emmett–Teller (BET) surface area of 2497 m2 g−1, which matches well with geometric surface area calculations. The CO2 adsorption properties of WUF-22 are reported. Solvothermal reaction of pure 2-nitro-[1,1′-biphenyl]-4,4′-dicarboxylic acid (H2bpdcNO2) with Zn(NO3)2·6H2O in DMF solvent gives two highly open MOFs with pentazinc and dodecazinc secondary building units. Spiking H2bpdcNO2 with H2bpdc directs phase selection to the IRMOF-9-type framework. The gas adsorption properties of the latter framework are discussed. [ABSTRACT FROM AUTHOR]

A novel porous organic polymer (POP) has been constructed through the condensation of triptycene tricatechol and 1,3,5-benzenetris(4-phenylboronic acid). This triptycene-based POP exhibited high H2 uptake (up to 1.84 wt% at 77 K, 1 bar), large CO2 adsorption capacity (up to 18.1 wt% at 273K, 1 bar), and excellent CO2/N2 adsorption selectivity (up to 120/1). The influence of solvent on the gas adsorption performance of the POP has also been investigated. [ABSTRACT FROM AUTHOR]

A triptycene-based microporous organic polymer (MOP) in which 2,6-bis(benzimidazol-2-yl)pyridine (bbp) is incorporated as linkage and coordination site is designed and synthesized. Pd(II) ions are further immobilized in this MOP through the coordination interactions between Pd(II) ion and nitrogen atoms of bbp. The resulting material shows high stability and exhibits excellent heterogeneously catalytic activity for the Suzuki-Miyaura cross-coupling reaction. Its high efficiency can be maintained after being reused for a number of cycles. [ABSTRACT FROM AUTHOR]

The construction of supramolecular systems in aqueous media is still a great challenge owing to the limited sources of building blocks. In this study, a series of 4-aryl- N-methylpyridinium derivatives have been synthesized. They formed very stable host-guest (1:2) complexes with CB[8] in water (binding constants up to 1014 M−2) with the two guest molecules arranged in a head-to-tail manner and the complexes showed high thermostability, which was revealed by 1H NMR and UV/Vis spectroscopic studies, ITC, and crystallographic analysis. [ABSTRACT FROM AUTHOR]

Abstract: A series of fully rigid rod–rod type amphiphilic molecules have been constructed by using 4,4′-bipyridin-1-ium or 4,4′-bipyridin-1,1′-diium (viologen) as a hydrophilic segment and phenyl, biphenyl or para-tert-phenyl as a hydrophobic unit. The crystal structures of four of the molecules have been elucidated. TEM, SEM, AFM, and DLS experiments revealed that these stiff amphiphiles could self-assemble into diverse architectures, including spherical micelles, ultra-long straight nanofibers (>1 mm), and nanotubes in water, which depend on the hydrophilic/hydrophobic fraction ratios of the molecules. [Copyright &y& Elsevier]

Interestin two-dimensional (2D) polymers has increased rapidly since the isolationof graphene. However, approaches to the preparation of graphene-likematerials still face great challenges. Herein we report a facile methodto prepare single molecular thick 2D polymers by simply running thepolymerization reaction in a flask without the aid of any templatesand postmodification techniques. The strategy is to use the triptycenescaffold, a rigid three-dimensional skeleton, as one monomeric unitto substantially suppress the interlayer interaction between the as-formedpolymeric 2D monolayers. The new individual monolayered 2D polymersfloat freely in solution and can be further transferred onto solidsurface for characterization. It is also found that the resulting2D polymeric monolayers can further evolve into monolayered or multilayeredhollow spheres, which might be regarded as a model for the transformationof graphene to fullerene. [ABSTRACT FROM AUTHOR]

Reverse vesicles exhibiting functions similar to thoseof normalvesicles have been constructed through the self-assembly of TTF/CBPQT4+-based pseudo[2]rotaxanes in a nonpolar solvent. The endsof the threads of the pseudo[2]rotaxanes are attached with a Fréchet-typeG-3 dendron and a hydrogen-bonded arylamide foldamer. These vesiclesexhibit a response to redox. By exploiting the dynamic featurespontaneouslyslow disassociation of the pseudorotaxanesthe sustained releaseof dyes embedded in the reverse vesicles has been demonstrated, whichcan be further tuned by changing the solvent polarity. [ABSTRACT FROM AUTHOR]

The cover page of the May 2015 issue of the "Chinese Journal of Chemistry" with reference of the article "A Triptycene-Based Porous Organic Polymer that Exhibited High Hydrogen and Carbon Dioxide Storage Capacities and Excellent CO2/N2 Selectivity" by Xin Zhao is presented.

A two-dimensional (2D) supramolecular organic framework (SOF) has been constructed through the co-assembly of a triphenylamine-based building block and cucurbit[8]uril (CB[8]). Fluorescence turn-on of the non-emissive building block was observed upon the formation of the 2D SOF, which displayed highly selective and sensitive recognition of picric acid over a variety of nitroaromatics. [ABSTRACT FROM AUTHOR]

Chiral amplification is an interesting phenomenon in supramolecular chemistry mainly observed in complicated systems in which cooperative effect dominate. Herein, chiral, supramolecular, propeller-like architectures have been constructed through coassembly of an achiral disk-shaped molecule and chiral amino acid derivatives driven by intermolecular hydrogen bonding. Both the 'sergeants-and-soldiers' principle and 'majority-rules' effect are applicable in these discrete four-component supermolecules, which are the simplest supramolecular system ever reported that exhibit chiral amplification. [ABSTRACT FROM AUTHOR]

The self-assembly of a new type of three-dimensional (3D) supramolecular polymers from tetrahedral monomers in both organic and aqueous media is described. We have designed and synthesized two tetraphenylmethane derivatives T1 and T2, both of which bear four tetrathiafulvalene (TTF) units. When the TTF units were oxidized to the radical cation TTF.+, their pre-organized tetrahedral arrangement remarkably enhanced their intermolecular dimerization, leading to the formation of new 3D spherical supramolecular polymers. The structure of the supramolecular polymers has been inferred on the basis of UV/Vis absorption, electron paramagnetic resonance, cyclic voltammetry, and dynamic light scattering (DLS) analysis, as well as by comparing these properties with those of the self-assembled structures of mono-, di-, and tritopic control compounds. DLS experiments revealed that the spherical supramolecular polymers had hydrodynamic diameters of 68 nm for T1 (75 μ M) in acetonitrile and 105 nm for T2 (75 μ M) in water/acetonitrile (1:1). The 3D spherical structures of the supramolecular polymers formed in different solvents were also supported by SEM and AFM experiments. [ABSTRACT FROM AUTHOR]

A chiral supramolecular alternate block copolymer has been self-assembled from a ureidopyrimidinone (UPy)-terminated arylamide-based hydrogen bonded foldamer and a structurally flexible pentamer, which is driven by the ion-pair binding of the two arylamide segments toward chiral ammonium and carboxylate guests. [ABSTRACT FROM AUTHOR]

Two chiral (A)6B-typed supramolecular cages were constructed from hydrogen-bonded C6-symmetric zinc porphyrin hexamers and chiral C3-symmetric pyridyl hexadentates with a core of 1,3,5-triphenylbenzene. Circular dichroism and molecular simulations revealed that the symmetry of the supramolecular cages switched from pseudo- C3 v to C3 with the rotational confinement of the biphenyl backbones at low temperatures, which generated conformationally chiral transfer and amplification. This unique phenomenon suggests a new strategy to develop smart materials with high sensitivity and excellent reversibility. [ABSTRACT FROM AUTHOR]