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Due to the existence of hypoxic microenvironment, the efficacy of photodynamic therapy (PDT) is frequently weakened. As a result, targeted treatment toward oxygen‐rich mitochondria is considered as a promising cancer therapy. Herein, both triphenylphosphine (TPP) and folic acid (FA) are simultaneously grafted onto nanoscale metal‐organic frameworks (NMOFs) to realize dual‐targeting delivery of the nanoplatforms into cancer cells and their mitochondria via the proposed phosphorylation modification strategy. A large amount of highly efficient photosensitizer of porphyrinic molecules is integrated into the NMOFs with a uniform particle size of about 65 nm. Thanks to the strong Zr−O−P bonding, a dense coverage of phosphonate‐conjugating targeting molecules on NMOFs is obtained and each surficial unsaturated Zr−O cluster is adequately occupied. The resultant dual‐targeting NMOFs feature high biostability and biocompatibility, as well as improved cellular uptake and mitochondrial accumulation. The PDT efficacy of these dual‐targeting NMOFs is significantly improved with a low IC50 of 0.74 μM upon 10 min light radiation, which is at least four times higher than that of non‐targeting counterparts. This phosphorylation strategy would be hopeful for immobilizing a variety of biogenic groups on NMOFs to make them targetable to various specific organelles and to improve the therapy efficacy on related diseases. [ABSTRACT FROM AUTHOR]

In this paper, the effects of several addictives, such as citric acid, sodium silicate, phosphoric acid, alum and polypropylene fiber, on the mechanical properties and water resistance of magnesium oxysulfate cement were studied. The phase composition and microstructure of the hydration products were analyzed by XRD, FT-IR, and SEM. The results show that a large number of needle-shaped 5Mg(OH)2⋅MgSO4⋅7H2O(517 phase) crystals were formed in the modified magnesium oxysulfate cement. In the absence of fiber reinforcement, using citric acid and alum as compound additives had the best modification effect, and their flexural strength, compressive strength and water resistance were greatly improved, meanwhile, the modification mechanism of alum was discussed for the first time. In addition, it has been found that magnesium oxysulfate cement and polypropylene fiber had good binding ability, which provided a new idea for strengthening and modifying magnesium oxysulfatecement. [ABSTRACT FROM AUTHOR]

Metal–organic frameworks (MOFs) have exhibited huge potential in the field of CO2 electroreduction but highly stable and active ones are still scarce. This study reports a (5,10,15,20-tetrakis(4-carboxyphenyl)porphyrinato)-Fe(III) chloride (FeTCPPCl) co-building UiO-66 electrocatalyst for CO2 reduction in an aqueous solution. In situ X-ray absorption spectroscopy (XAS) measurements characterized its robust structure under catalysis. The unique framework of UiO-66 provides the available proton facilitator for improving CO2 reduction activity on iron porphyrin, and a concerted proton–electron transfer (CPET) mechanism might be considered for the catalytic pathway, achieving the highest faradaic efficiency of nearly 100% at an overpotential of 450 mV for turning CO2 to CO in the reported MOFs. [ABSTRACT FROM AUTHOR]

Simple and effective separation of isomeric organic molecules is an important but challenging task. Herein, we successfully developed a selective crystallization strategy to separate the mixtures of isomeric dicarboxylic acids (DCAs) for the first time. The target DCAs could be preferably combined with crystallization inducer of Zr4+ ions to form a pre‐designed metal‐organic frameworks (MOFs) crystal structure whereas the entry of non‐target isomeric DACs into the MOFs lattice could be exclusively inhibited. Several isomeric pairs were exemplified to verify the extensibility and validity of the developed strategy. iSelect! An extensible strategy has been proposed to separate the mixtures of isomeric dicarboxylic acids by selectively crystallizing the target isomers into a pre‐designed MOFs crystal. [ABSTRACT FROM AUTHOR]

A novel metal–organic framework of RuUiO-67 was successfully fabricated and exploited as a chemical sensor for the colorimetric detection of Hg2+. The chromophoric Ru complex in RuUiO-67 was designed as a Hg2+ recognition site and a signal reporter. The elaborated probe exhibited a rapid colorimetric response, high selectivity, and sub-micromolar sensitivity for Hg2+ detection. [ABSTRACT FROM AUTHOR]

Bergman cyclization has shown great promise in constructing conjugated polymers. However, the application of this reaction in polymer science is still limited due to the harsh reaction condition and ill-defined structure of the achieved polymers. To this end, the cycloaromatization polymerization of enediynes catalyzed by a series of transition metal catalysts is investigated in this work, by taking advantage of the coordination chemistry of the enediyne with the transition metal complexes. According to the nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR), ultraviolet-visble (UV-Vis) spectroscopies and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) analysis, the cycloaromatization polymerization of enediynes proceeds under milder conditions and in a more controlled manner in the presence of palladium(II) complexes, giving structurally regulated conjugated polymers in high yields. [ABSTRACT FROM AUTHOR]

Owing to the high toxicity of CrVI species to human health and the ecosystem, much attention has been paid to the development of efficient adsorbents for CrVI. Herein, MIL-100(Fe) was successfully utilized as a precursor for the carbothermal reductive synthesis of nanoscale zero-valent iron functionalized porous carbon (nZVI@C) for the effective removal of CrVI. The organic ligands in MIL-100(Fe) were transformed into a porous carbon matrix, whereas the Fe-O clusters were reduced in situ to nZVI owing to the strong reducibility of pyrolytic carbon. Additionally, the nZVI was distributed uniformly in the carbon support with a high loading and controllable particle size. Highly toxic CrVI species were efficiently degraded into less toxic CrIII species at the nZVI reductive sites, and then the CrIII species precipitated as (CrxFe1-x)(OH)3 in the porous hybrids. The CrVI adsorption capacity of the developed nZVI@C reached 206 mg g-1 under optimal conditions. Furthermore, the excellent magnetic performance of nZVI@C makes it convenient for CrVI remediation through simple magnetic separation. These outstanding characteristics indicate the promising potential of the developed material as an adsorbent for the efficient removal of CrVI from industrial wastewater. [ABSTRACT FROM AUTHOR]

Given the serious harm of CrVI to human health, development of efficient techniques for its degradation and subsequent in situ adsorptive removal is highly desirable. Herein, UiO-66 type metal-organic frameworks (MOFs) integrated with various hydroxyl groups (UiO-66, UiO-66-OH, and UiO-66-(OH)2) were successfully explored for the efficient decontamination of CrVI from aqueous solution. The abundant hydroxyl groups in organic ligands not only served as reductive sites for the degradation of CrVI to less toxic CrIII but also acted as inherent anchorages for the efficient capture of CrIII. Thanks to their inherent hydroxyl groups and high porosity, UiO-66-(OH)2 presented almost complete removal of Cr species in simulated industrial wastewater. The total Cr content could be reduced from 5 ppm to 48 ppb under optimized adsorption conditions, which is much lower than the limits of total Cr in drinking water established by the US Environmental Protection Agency (EPA). These outstanding CrVI decontamination features, combined with the exceptional chemical stability as well as high porosity prefigured the great potentials of the current adsorbents for the remediation of real-world CrVI-containing industrial wastewater. [ABSTRACT FROM AUTHOR]

A novel approach is developed to study the electromagnetic wave absorption properties based on chemical molecular structure in this work. The MWNT- g-ABPBO composite with core-shell structure, initiated by macromolecule MWNT-benzocyclobutene(ethyl 2-bromoisobutyrate) (MWNT-BCB(EBIB)) via ATRP method, exhibits outstanding electromagnetic wave absorption properties in the Ku band. Traditionally, the electromagnetic wave absorption occurs around the wavelength of 3 cm (at 8 GHz), while the studies on materials with absorption properties at the wavelength slightly under 1.5 cm (at 20 GHz), namely part of the Ku band, are limited. The absorption peak of MWNT- g-ABPBO composite, with the thickness of 2.8 mm, can reach −36 dB at 17.4 GHz, because of the excellent impedance matching between the initiator and monomers bearing highly conjunction chemical structure introduced by ATRP. Meanwhile, the maximum reflection loss (RL) was −47 dB at the frequency of 15.5 GHz and the effective absorption bandwidth (<−10 dB) is from 13 to 18 GHz. [ABSTRACT FROM AUTHOR]