Covalent organic frameworks (COFs) are crystalline porous materials bearing microporous or mesoporous pores. The type and size of pores play crucial roles in regulating the properties COFs. In this work, a novel COF, which bears two different kinds ordered with controllable sizes: one within range (7.1 Å) other (26.9 Å), has been constructed via one-step synthesis. structure dual-pore COF was confirmed by PXRD investigation, nitrogen adsorption-desorption study, theoretical calculations.

The self-assembly of well-defined 2D supramolecular polymers in solution has been a challenge chemistry. We have designed and synthesized rigid stacking-forbidden 1,3,5-triphenylbenzene compound that bears three 4,4'-bipyridin-1-ium (BP) units on the peripheral benzene rings. Three hydrophilic bis(2-hydroxyethyl)carbamoyl groups are introduced to central ring suppress 1D stacking triangular backbone ensure solubility water. Mixing preorganized molecule with cucurbit[8]uril (CB[8]) 2:3 molar...

It is very important to create novel topologies and improve structural complexity for covalent organic frameworks (COFs) that might lead unprecedented properties applications. Despite the progress achieved over past decade, diversity of COFs are quite limited. In this Communication, we report construction bearing three different kinds pores through heterostructural mixed linker strategy involving condensation a D2h-symmetric tetraamine two C2-symmetric dialdehydes lengths. The complicated...

Abstract Self-assembly has emerged as a powerful approach to generating complex supramolecular architectures. Despite there being many crystalline frameworks reported in the solid state, construction of highly soluble periodic networks three-dimensional space is still challenge. Here we demonstrate that encapsulation motif, which involves dimerization two aromatic units within cucurbit[8]uril, can be used direct co-assembly tetratopic molecular block and cucurbit[8]uril into organic...

The topology of a covalent organic framework (COF) is generally believed to be dictated by the symmetries monomers used for condensation reaction. In this context, use with different usually required afford COFs topologies. Herein, we report conceptual strategy regulate 2D introducing alkyl substituents into skeleton parent monomer. resulting monomers, sharing same C2 symmetry, were assembled D2h symmetric tetraamine generate dual-pore COF or single-pore COFs, depending on sizes...

Systematically tuning the spatial environment around active sites of synthetic catalysts is a difficult challenge. Here, we show how this can be accomplished in pores multicomponent metal–organic frameworks. This relies on embedding catalytic unit pore MUF-77 framework and then its by introducing different functional groups to surrounding linkers. approach benefits from structural regularity MUF-77, which places each component precise location circumvent disorder. Prolinyl groups, are...

Without or with the assistance of CB[8], a triangular radical monomer can self-assemble into 2D supramolecular organic frameworks in water.

Interest in two-dimensional (2D) polymers has increased rapidly since the isolation of graphene. However, approaches to preparation graphene-like materials still face great challenges. Herein we report a facile method prepare single molecular thick 2D by simply running polymerization reaction flask without aid any templates and postmodification techniques. The strategy is use triptycene scaffold, rigid three-dimensional skeleton, as one monomeric unit substantially suppress interlayer...

Metal–organic frameworks (MOFs) exhibit a broad range of luminescence characteristics due to the vast array metal ions and organic linkers available as building blocks. Systematic control over emissive output MOFs is highly sought after. Methods for tuning emission profiles are emerging based largely on luminescent encapsulation guests. Herein, we show how functionalization series multicomponent MUF-77 (MUF = Massey University Framework) materials can methodically tune their spectral output....

Controlling chemical reactions in porous heterogeneous catalysts is a tremendous challenge because of the difficulty producing uniform active sites that can be tuned with precision. However, analogous to enzymes, when catalytic pocket provides complementary close contacts and favorable intermolecular interactions reaction participants, efficiency selectivity may tuned. Here, we report an isoreticular family based on multicomponent metal–organic framework MUF-77. The microenvironment around...

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 non-emissive was observed upon formation 2D SOF, which displayed highly selective sensitive recognition picric acid over variety nitroaromatics.

ZSM-5/MCM-41 zeolite composites with varying mesopore sizes were prepared through alkali-desilication and surfactant-directed recrystallization different chain length of alkyltrimethylammonium bromide. XRD TEM revealed that the possessed characteristics both ZSM-5 mesoporous MCM-41 hexagonal symmetry. N2-adsorption–desorption, 27Al MAS NMR, NH3-TPD in situ FT-IR results suggested mesopores accessibility acid sites could be affected greatly by bromide used. Catalytic cracking n-dodecane over...

Single-layer two-dimensional supramolecular organic frameworks were constructed through self-assembly of rigid vertexes, flexible edges, and cucurbit[8]uril hosts.

The self-assembly of a new type three-dimensional (3D) supramolecular polymers from tetrahedral monomers in both organic and aqueous media is described. We have designed synthesized two tetraphenylmethane derivatives T1 T2, which bear four tetrathiafulvalene (TTF) units. When the TTF units were oxidized to radical cation TTF(.+) , their pre-organized arrangement remarkably enhanced intermolecular dimerization, leading formation 3D spherical polymers. structure has been inferred on basis...

Uniform CuCoP embedded in N-doped carbon frameworks with efficient bifunctional oxygen electrocatalytic performance are derived from ZIF-67<italic>via</italic>a polymer-coating method.

Hydrogels have been constructed from monolayered two-dimensional (2D) supramolecular polymers in water. The as-prepared hydrogels exhibited extremely high thermal stabilities, which demonstrates how the 2D structure can impact bulk properties of soft materials.

The construction of supramolecular systems in aqueous media is still a great challenge owing to the limited sources building blocks. In this study, series 4-aryl-N-methylpyridinium derivatives have been synthesized. They formed very stable host-guest (1:2) complexes with CB[8] water (binding constants up 10(14) M(-2)) two guest molecules arranged head-to-tail manner and showed high thermostability, which was revealed by (1) H NMR UV/Vis spectroscopic studies, ITC, crystallographic analysis.

A series of π-conjugated oligomeric viologens have been synthesized, from which supramolecular radical polymers were constructed through the stacking their cations.

Abstract Bone infection is an inflammatory bone disease caused by infectious microorganisms, which can lead to progressive destruction and loss. It still urgent unmet clinical need develop a rapid effective sterilized method reduce infection. In this study, near‐infrared (NIR) light‐responsive polydopamine (PDA) adherent Copper nanoparticles (Cu‐NPs) are constructed using electrospun poly lactic acid (PLLA) fibers as substrate (PLLA@PDA/Cu). Dopamine (DA) self‐polymerized synthesize the PDA...

A novel dual responsive nanomaterial sensitive to both photo- and pH stimuli has been successfully developed. The polymer-based nanoparticles were fabricated from a specially designed pH-responsive amino-substituted azobenzene monomer, 4-amino-4′-methacrylatylazobenzene (AMAAB), via free radical polymerization with trimethylolpropane trimethacrylate (TRIM) cross-linkers. trans-cis photoisomerization properties of AMAAB retained after incorporation into the rigid three-dimensional...

Two new types of supramolecular polymers have been constructed via the self-assembly rigid rod-like monomers and cucurbit[8]uril (CB[8]) in water. These possessed backbones further aggregated into stick-like bunched fibres.

Metal-organic frameworks (MOFs) can respond to light in a number of interesting ways. Photochromism is observed when structural change the framework induced by absorption light, which results color change. In this work, we show that introducing quinoxaline ligands MUF-7 and MUF-77 (MUF = Massey University Framework) produces photochromic MOFs from yellow red upon 405 nm light. This photochromism only units are incorporated into not for standalone solid state. Electron paramagnetic resonance...

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

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