Volume 51, Issue 9, September 2022

We investigated the structural properties of microemulsions (MEs) dispersed in oil base including hydrophobic deep eutectic solvents (DESs) and their skin permeabilities. DES caused the structural transition of MEs from a sphere to a cylinder and to a bicontinuous system. MEs dispersed in the solvent containing a moderate amount of DES, which formed a cylindrical structure, penetrated the skin most.

The first kinetically stabilized 2,2-dihydrosilene 1 bearing 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt) and 2,6-diisopropylphenyl (Dip) groups was synthesized as a stable compound. The formation of 1 was confirmed by multinuclear and 2D NMR studies and extensive theoretical calculations.

A staple-shaped linear coordination polymer containing a single metal node was constructed via conformational adaptive synthesis strategy. The emissive complex CP 1 showed excellent photocatalytic activity for azide alkyne cycloaddition reaction (CuAAC) in solution at room temperature.

Novel UV-curable bio-based polymers were prepared from cashew nut shell liquid (CNSL), a non-edible biomass, at room temperature via thiol-ene photoclick reaction. The resultant UV-cured polymers showed flexibility, transparency with highly gloss, thermal resistance, and long-term stability as compared with other CNSL-based polymers. This UV-curable polymer can be very advantageous in application of flexible coating and film.

Nitrile oxides afford 2-isoxazolines upon [2 + 3] cycloaddition with alkenes. Herein, we prepared oxime-substituted nitrile oxides bound to allylic-alcohol derivatives through a silicon atom and demonstrated their intramolecular cycloaddition reactions. The desired cycloadducts were obtained as single regioisomers in good yields. Furthermore, face-selective cycloaddition reactions were achieved using α-substituted allylic-alcohol derivatives, affording the desired cycloadducts with high diastereoselectivity.

Operando Ce K-edge XANES measurements of CeO₂-supported Ni (Ni/CeO₂) catalysts for chemical looping dry reforming of methane (CLDRM) were performed. Low-loading Ni/CeO₂ was effective for selectively promoting the partial oxidation of CH₄. Operando XANES measurements revealed that the reoxidation of reduced Ce oxide during CO₂ reduction was faster than the reduction of Ce oxide during CH₄ oxidation.

A highly selective molecularly imprinted polymer was prepared via self-assembly of dopamine to attach aflatoxin B1 as the template onto the surface of ferroferric oxide nanoparticles, and aflatoxin B1 and B2 are recognized owing to homologous cavities of the magnetic materials, and quantified by UPLC-FLD with a large volume flow cell after desorption with methanol.

The generation of CO₂ in glucose and derivatives fuel cells has been confirmed. The cell was composed of KOH solution/PEDOT:PSS, PtRu and SWCNT anode/Pt cathode. The volumes of CO₂ per released charges (Q_out) were evaluated after the measurement of discharge capacity. The results indicate that all carbons in fuel molecules convert into CO₂.

Fe-added zirconium oxide electrocatalysts were synthesized from pyrazine carboxylic acid for oxygen reduction reaction (ORR) in acidic media. The optimization of the Fe-additive ratio led to the highest ORR activity among that of previous studies. It was owing to the formation of high-quality active sites and an effective electron supply path to the active site using pyrazine carboxylic acid complexes.

We developed a rational synthetic approach for benzoheterole-fused porphyrins and demonstrated the synthesis of benzothiophene- and indole-fused porphyrins using the approach. In addition, the π-circuit of indole-fused Co^II porphyrin can be switched by oxidation of central Co^II ion.

Novel sandwich-type ruthenium complexes [Ru(η⁶-arene)(p-cymene)](BF₄)₂, in which the η⁶-arene ligands have long alkyl chains, were prepared. These complexes were dispersed in water to form corresponding micelles. [Ru(p-undecyloxyanisole)(p-cymene)]²⁺ was converted to [Ru(η⁶-p-methoxyphenolate)(p-cymene)]⁺ through the unexpected demethylation by treatment with Na₂CO₃ with the micelle remaining. The micelle collapsed when a similar ruthenium complex bearing dodecyl 2-(4-methoxyphenoxy)acetate was treated with Na₂CO₃ aq.

The prepared 8-HQ intercalated MMT (8HQ-MMT) by the ion exchange method is an acid-/alkali-/salt- multi-responsive composite corrosion inhibitor. The corrosion inhibition efficiency of Q235 steel in 3.5%NaCl + 1.0 g/L 8HQ-MMT solution can reach 56.16%. The coating mixed with 8HQ-MMT can significantly improve the corrosion resistance of coating, and especially for endowing the self-healing ability to a certain extent.

A lignin-based membrane was fabricated using aminated lignin and trimesoyl chloride as raw materials by interfacial polymerization. The membrane possesses excellent water permeability, high retention rates to multivalent salts and organic dyes, satisfactory acid-alkali and chlorine resistances, and separation-performance stability. It also shows better retention capability and alkaline stability than those of the membrane fabricated with pristine alkaline lignin.

The nucleophilic addition of aniline was examined using a diketo cage-opened C₆₀ derivative possessing an acid anhydride moiety. While the imination occurred at the 1,4-dicarbonyl moiety, the aminalization dominantly proceeded on the anhydride moiety in the presence of zinc(II). The aminal could be transformed into an isoimide-embedded open-cage C₆₀ derivative under acidic conditions.

An efficient method for the silylation of alcohols was developed using N,O-bis(tert-butyldimethylsilyl)acetamide (BTBSA) and 3 mol % of N,N-dimethyl-4-aminopyridine N-oxide (DMAPO). Monosilylation of 1,2-diols was successfully achieved with high chemoselectivity. In addition, several control experiments revealed that a phenolic hydroxy group was silylated much faster than a primary alcohol in both an inter- and intramolecular manner.

In this paper, Zn-doped SnO₂ nanoparticles constructed by hydrothermal synthesis can effectively reduce the grain size and can increase vacancies in the sample, which is conducive to adapt to the volume change during the circulation process, reduce the internal resistance of battery and increase the conductivity. The most favorable Zn-doped content can be found by researching the samples formed at different Zn-doped content.

Toward CO₂ capture from air, highly-permeable nanomembranes of poly(dimethylsiloxane) (PDMS) were mechanically reinforced by thin layers of carbon nanotube (CNT), giving CO₂ permeability and gas selectivity of 42,500 GPU and 10 (CO₂/N₂), respectively in the case of the 27-nm-thick, composite membrane.

Preparation of functional materials with main group elements was achieved with dendrimer templates. Stepwise assembly of bismuth salts realized tunable photoluminescent materials. BH₃ in the dendrimer played as a reducing capsule for synthesis of size-controlled particles. 13 atom assembly of AlCl₃ or GaCl₃ enabled a solution-phase synthesis of superatoms which has been expected to be new building blocks.

Polyiodide species were synthesized under the conditions of both an acidic environment in the nanospace of single-walled carbon nanotube and light irradiation. The results strongly support the existence of nano-restricted acidic phase that plays an essential role for the production of polyiodide. Carbon nanospace can stabilize the acidic condition even in the basic aqueous solution environment.

Urea segments were attached to a rigid three-dimensional π-framework, trinaphtho[3.3.3]propellane. The resulting perimidin-2-one-fused molecule formed strong hydrogen bonds and provided void-containing solids different from other propellane molecules. Due to the hydrogen-bonding units and intrinsic free volume, the solid showed selective adsorption of alkane and CO₂ gases with preference of CO₂ over CH₄.