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The difluoropropargyl group is a useful moiety for biological applications such as in vivo click chemistry for molecular imaging techniques. Silyl-protected bromodifluoropropyne is an important difluoropropargylation reagent with previously unexplored radical reactivity. Herein, we report visible-light-induced thiyl-radical-catalyzed hydrodifluoropropargylation reactions between silyl-protected bromodifluoropropyne and alkenes in the presence of benzothiazoline as a critical reductant.

Because of their desired features, including very specific surface areas and designable framework architecture together with their possibility to be functionalized, Metal Framework (MOF) is a promising platform for supporting varied materials in respect of catalytic applications in water treatment. In this work, a novel visible-light-responsive photocatalyst that comprised BiVO₄ together with MIL-125(Ti), was synthesized by a two-step hydrothermal approach. The characterization of as-obtained samples as performed by X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, Fourier transform infrared spectroscope, X-ray photoelectron spectroscopy and ultraviolet-visible diffuse reflection spectra. Rhodamine B was selected being a target for the evaluation of the photocatalytic function of as-developed photocatalyst. The photocatalytic reaction parameters, for example, the content of BiVO₄ as well as initial concentration of Rhodamine B was researched. The composite photocatalyst possessing Bi:Ti molar ratio of 3:2 brought to light the fact that the greatest photocatalytic activity had the ability to degrade 92% of Rhodamine B in 180 min. In addition to that, the BiVO₄/MIL-125(Ti) composite could keep its photocatalytic activity during the recycling test. The phenomenon of disintegration of the photo-generated charges in the BiVO₄/MIL-125(Ti) composite was brought to discussion as well.

A novel visible-light responsive photocatalyst of BiVO₄/MIL-125(Ti) was synthesized via a two-step hydrothermal method. The BiVO₄/MIL-125(Ti) composite shows prior photocatalytic performance than parent materials. The enhancement of catalytic activity was attributed to the increasing separation rate of photogenerated charge carriers based on the formation of interface between BiVO₄ and MIL-125(Ti).

Three-dimensional MOF superstructures with hierarchical porosity can overcome the limitation of the intrinsic confined pore sizes of MOFs. Here a hydrophobic hierarchical metal–organic framework (HZIF-8) containing unusual micro-, meso-, and macropores was synthesized by a facile template strategy. HZIF-8 displayed significantly improved capacities for the adsorption of liquid oils, while maintaining low water uptake. More information can be found in the Full Paper by L. Wang, W. Shi, P. Cheng, et al. (DOI: 10.1002/chem.201704929).

Fast and effective adsorbents for the selective removal of Hg^II and Pb^II ions were prepared by the reaction of Zn(NO₃)₂⋅6H₂O, H₂BDC, and N₁,N₂-bis(pyridin-4-ylmethylene) ethane-1,2-diamine (L) that yields an unprecedented two-dimensional layer-based supramolecular framework, {Zn(BDC)(L*)}⋅DMF (TMU-40), by solvothermal reaction. The formation of this framework involved an in situ C=C coupling of L to L* [L*=5,6-di(pyridin-4-yl)-1,2,3,4-tetrahydropyrazine]. As L* contains free nitrogen atoms, direct reaction of L* and metals led to metallated products. Post-synthetic modification of this novel MOF (TMU-40) with H₂O₂ gives a new framework (O-TMU-40) by same structure and different ligand, which also bears free nitrogen atoms. FTIR spectra, TGA analysis, X-ray diffraction, Zeta Potential analysis and ¹H NMR spectroscopy were used to characterize the prepared frameworks. The TMU-40 and O-TMU-40 frameworks were used for heavy-metal removal from aqueous solutions. Maximum adsorption values of 269 mg g⁻¹ for Hg^II with TMU-40 and 215 mg g⁻¹ for Pb^II with O-TMU-40 were achieved in 10 min at 298 Kwithout changes in the pH of the adsorption medium with pseudo-second order kinetics based on the Langmuir model. The extremely fast kinetics of TMU-40 means this adsorbent can reduce heavily contaminated water containing Hg^II concentrations of 40 ppm down to the acceptable limit of 2 ppb.

Heavy metal in the MOF pit: Fast and effective adsorbents for selective removal of Hg^II and Pb^II ions were prepared by the solvothermal reaction of Zn(NO₃)₂⋅6H₂O, H₂BDC and N₁,N₂-bis(pyridin-4-ylmethylene) ethane-1,2-diamine (L) that yields an unprecedented two-dimensional layer-based supramolecular framework, {Zn(BDC)(L*)}⋅DMF (TMU-40). Post-synthetic modification with H₂O₂ results in new framework O-TMU-40 also bearing free nitrogen atoms available for mercury and lead adsorption.

Covalent organic frameworks (COFs) are attractive candidates for advanced water-treatment membranes owing to their high porosity and well-organized channel structures. Herein, the continuous two-dimensional imine-linked COF-LZU1 membrane with a thickness of only 400 nm was prepared on alumina tubes by in situ solvothermal synthesis. The membrane shows excellent water permeance (ca. 760 L m⁻² h⁻¹ MPa⁻¹) and favorable rejection rates exceeding 90 % for water-soluble dyes larger than 1.2 nm. The water permeance through the COF-LZU1 membrane is much higher than that of most membranes with similar rejection rates. Long-time operation demonstrates the outstanding stability of the COF-LZU1 membrane. As the membrane has no selectivity for hydrated salt ions (selectivity <12 %), it is also suitable for the purification of dye products from saline solutions. The excellent performance and the outstanding water stability render the COF-LZU1 membrane an interesting system for water purification.

Color filter: A continuous, high-quality two-dimensional imine-linked COF membrane with ordered and tunable pore channels was prepared on tubular alumina supports. The COF-LZU1 membrane shows excellent water permeance and high rejection rates for various water-soluble dyes, as well as high stability during water purification.