As an emerging class of porous crystalline materials, covalent organic frameworks (COFs) are excellent candidates for various applications. In particular, they can serve as ideal platforms capturing CO2 to mitigate the dilemma caused by greenhouse effect. Recent research achievements using COFs capture highlighted. A background overview is provided, consisting a brief statement on current issue, summary representative materials utilized capture, and introduction COFs. Research progresses on:...

Heavy metal contamination in water is a serious risk to the public health and other life forms on earth. Current research nanotechnology developing new nanosystems nanomaterials for fast efficient removal of pollutants heavy metals from water. Here, we report graphene oxide-based microbots (GOx-microbots) as active self-propelled systems capture, transfer, (i.e., lead) its subsequent recovery recycling purposes. Microbots' structure consists nanosized multilayers oxide, nickel, platinum,...

Covalent organic frameworks (COFs) are excellent platforms with tailored functionalities in photocatalysis. There still challenges increasing the photochemical performance of COFs. Therefore, we designed and prepared a series COFs for photocatalytic hydrogen generation. Varying different ratios β-ketoenamine to imine moieties linkages could differ ordered structure, visible light harvesting, bandgap. Overall, β-ketoenamine-linked exhibited much better activity than those having both on...

Covalent organic frameworks (COFs) are excellent candidates for various applications. So far, successful methods the constructions of COFs have been limited to a few condensation reactions based on only one type covalent bond formation. Thus, exploration new judicious synthetic strategy is crucial and emergent task development this promising class porous materials. Here, we report orthogonal reaction construct by reversible formations two types bonds. The obtained consisting multiple...

In order to selectively target malignant cells and eliminate severe side effects of conventional chemotherapy, biocompatible redox-responsive hollow nanocontainers with tumor specificity were fabricated. The mechanized achieved by anchoring mechanically interlocked molecules, i.e., [2]rotaxanes, onto the orifices mesoporous silica nanoparticles via disulfide bonds as intermediate linkers for intracellular glutathione-triggered drug release. [2]rotaxane employed was mainly composed U.S. Food...

A highly porous metal‐organic framework (MOF) incorporating two kinds of second building units (SBUs), i.e., dimeric paddlewheel (Zn 2 (COO) 4 ) and tetrameric (O)(CO 6 ), is successfully assembled by the reaction a tricarboxylate ligand with Zn II ion. Subsequently, single‐crystal‐to‐single‐crystal metal cation exchange using constructed MOF investigated, results show that Cu Co ions can selectively be introduced into without compromising crystallinity pristine framework. This...

Two new two-dimensional covalent–organic frameworks are synthesized using a three-connected building block, showing ultrahigh iodine capture capacities of 5.625 g g⁻¹ and 4.820 on account physical–chemical adsorption.

Covalent-organic frameworks (COFs) as porous crystalline materials show promising potential applications. However, developing facile strategies for the construction of COFs directly from amorphous covalent organic polymers (COPs) is still a great challenge. To this end, we report novel approach easy preparation COPs through linkage replacement under different types reactions. Four with high crystallinity and porosity were constructed via substitution polyimide-linked to imine-linked well...

Abstract The field of covalent organic frameworks (COFs) has been developed significantly in the past decade on account their important characteristics and vast application potential. On other hand, discovery novel synthetic methodology is still a challenging task to further promote preparation COFs. Herein, an interesting protocol for conversion amorphous nonporous polymers (COPs) COFs was established, affording four with high crystallinity porosity. Specifically, imine‐linked COP‐1...

Guest molecules may endow porous materials with new or enhanced properties as well functions. Here, a hydrogen-bonded organic framework (HOF) constructed from three-armed triphenylamine derivative is used to investigate how guests regulate photoluminescence and trigger force-stimuli response. It was found that guest solvents in pores might HOF's luminescence. Interestingly, acetic acid endowed HOF longer emission wavelengths triggered the responses mechanical force stimuli. Under shear...

A butterfly-shaped phenothiazine derivative, PTTCN, was synthesized to obtain pure organic porous crystals for the highly efficient absorptive separation of toluene (Tol) and methylcyclohexane (Mcy). Due presence three polar cyano groups nonplanar conformation, these molecules self-assembled into a hydrogen-bonded framework (X-HOF-5) with distinct cavities capable accommodating Tol through multiple hydrogen-bonding interactions. Upon solvent removal via heating, activated X-HOF-5 retained...

A new 3D azido-bridged coordination polymer, [Co1.5(N3)(OH)(Isonic)]n (1), has been synthesized and characterized its magnetic properties studied. Isonicotinate acts as a bridging coligand in this complex. In 1, all of the ligands take tridentate modes, overall structure 1 exhibits 3,6-connected net topology.

By simply modifying the expansion of ligand tether length, two Cd(ii) metal-organic frameworks have been constructed from linear tetranuclear and trinuclear cadmium clusters, respectively, which present an unprecedented 10-connected uninodal bct net.

Through the use of a series structurally related benzoates bearing different substituents as coligands, three new azido-copper compounds, [Cu(benzoate)(N(3))](n) (1), [Cu(2-methyl-benzoate)(N(3))](n) (2), and [Cu(1-naphthoate)(N(3))](n) (3), have been successfully obtained magnetically characterized. Single-crystal structure analyses indicated that uncoordinating in greatly affect complexes. Complex 1 displays isolated ferromagnetic chains with largest Cu-N-Cu angle known...

A new 2D coordination polymer with an azide-bridged 1D homospin chain is synthesized, which shows slow magnetic relaxation and step hysteresis loop, ascribed to be a typical Ising-type single-chain magnet.

A series of structurally related rigid imidazole ligands, 1,4-bis(imidazol-1-yl)benzene (L1), 1,4-bis(benzoimidazol-1-yl)benzene (L2), and 4,4′-bis(benzoimidazol-1-yl)biphenyl (L3), have been utilized to construct coordination polymers. The reactions CdX2 (X = BF4− or ClO4−) with these ligands afford three new three-dimensional networks, {[Cd(L1)3](BF4)2(CHCl3)2}∞ (1), {[Cd(L2)3](ClO4)2(CHCl3)4(CH3OH)2}∞ (2), {[Cd(L3)3](ClO4)2}∞ (3). Compounds 1−3 are all α-Po metal−organic frameworks (MOFs)...

Through the combination of Sm(III) spin carriers with a Fe(III) system, largest Fe-Ln cluster so far has been synthesized. To our knowledge, new complex, Fe(12)Sm(4), is first single-molecule magnet. Furthermore, Fe(12)La(4) and Fe(12)Gd(4) have also synthesized to help understand magnetic exchange interactions origin anisotropy in Fe(12)Sm(4).

A one-step multipurpose strategy is developed to realize a sophisticated design that simultaneously integrates three desirable components of nitrogen dopant, 3D graphene, and 1D mesoporous metal oxide nanowires into one hybrid material. This facile synthetic includes hydrothermal reaction followed by topotactic calcination. The utilization urea as the starting reagent enables precipitation precursor concurrent doping heteroatoms on graphene during reaction, while at same time nanosheets are...

Abstract An imine‐based nitrogen‐rich covalent‐organic framework (COF) was successfully synthesized using two triangular building units under solvothermal reaction condition. The gas adsorption properties of the obtained microporous COF were investigated. results indicated that activated material presented good up take capabilities CO 2 and CH 4 at 61.2 43.4 cm 3 ·g −1 1 atm 273 K, respectively, showing its application potential in selective capture separation.

Abstract Supramolecular self‐assembly stands for the spontaneous aggregation of small organic compounds or polymers into ordered structures at any scale. When being induced by inherent molecular chiral centers ambient asymmetric factors, spatial arrangement between building units shall occur, which is defined as supramolecular chirality. Except design, utilizing external stimulus factors to tune chirality a promising approach. In this Concept article, we particularly discuss important role...

Two 2D COFs with high crystallinity and large specific surface area are constructed using a three-connected distorted building block. High porosity dense chemisorption sites effectively improved their iodine adsorption capacity.