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Nanoparticle organic hybrid materials (NOHMs) have shown great potential as absorbents for CO2 capture owing to their attractive properties, including macroscopic liquid-like behavior, good dispersion properties, and tunable structures. However, only a few NOHMs are used as fillers to prepare mixed-matrix composite membranes (MMMs) for CO2 capture. Here, we demonstrated novel MMMs comprising a Pebax-1657 polymer matrix and NOHM fillers for separating a CO2/N2 mixture. Various types of NOHMs with a core/corona/canopy structure based on a CNT/SiO2 composite core were prepared and incorporated into the Pebax-1657 matrix. In particular, the effect of the composite core composition on CO2/N2 mixture permeation was systematically investigated. Benefiting from the dispersion properties of liquid-like NOHMs, excellent interfacial compatibility was obtained. Furthermore, functional groups on the canopy of NOHMs were confirmed to enhance the CO2-philic properties for separation. Specifically, the as-prepared membrane presented optimal performance regarding CO2 permeability (148.3 Barrer) and the separation factor (66.5 for CO2/N2), while also showing improvements in CO2 permeability by 142.3% and the CO2/N2 separation factor by 62.5% compared with neat Pebax membrane, overcoming the Robeson upper bound. Finally, the influence of the composite core composition (CNT/SiO2 weight ratio) in NOHMs on CO2 selective separation was investigated. A possible CO2 selective separation mechanism was also proposed. [ABSTRACT FROM AUTHOR]

This paper analyzed the trend of seed industry development in-depth and studied changes in quantity and quality of demands for seed industry talents. To adapt to "breeding, propagating and selling" integration and internationalized trend of seed industry, it stated that hierarchical training mode is an ideal mode for training outstanding seed industry talents. Finally, it elaborated specific objectives and requirements of the hierarchical training mode, i. e. undergraduate - master - doctor. [ABSTRACT FROM AUTHOR]

Porous liquids (PLs), an emerging kind of liquid materials with permanent porosity, have attracted increasing attention in gas capture. However, directly turning metal-organic frameworks (MOFs) into PLs via a covalent linkage surface engineering strategy has not been reported. Additionally, challenges including reducing the cost and simplifying the preparation process are daunting. Herein, we proposed a general method to transform Universitetet i Oslo (UiO)-66-OH MOFs into PLs by surface engineering with organosilane (OS) and oligomer species via covalent bonding linkage. The oligomer species endow UiO-66-OH with superior fluidity at room temperature. Meanwhile, the resulting PLs showed great potential in both CO 2 adsorption and CO 2 /N 2 selective separation. The residual porosity of PLs was verified by diverse characterizations and molecular simulations. Besides, CO 2 selective capture sites were determined by grand canonical Monte Carlo (GCMC) simulation. Furthermore, the universality of the covalent linkage surface engineering strategy was confirmed using different classes of oligomer species and another MOF (ZIF-8-bearing amino groups). Notably, this strategy can be extended to construct other PLs by taking advantages of the rich library of oligomer species, thus making PLs promising candidates for further applications in energy and environment-related fields, such as gas capture, separation, and catalysis.

A cascade coupling reaction toward a variety of phenanthridine derivatives has been developed. This cascade transformation proceeds via the copper-catalyzed coupling reaction of diaryliodonium salts and nitriles, and undergoes cyclization into the phenanthridine core.

A mild gold-catalyzed three-component dehydrogenative coupling of terminal alkynes to amines and indole-2-carboxaldehyde has been developed, which provides a practical synthetic strategy for the synthesis of indole derivatives.