A new and efficient hydrophilicity-directed approach (HDA) is developed to encapsulate large guest molecules beyond the aperture size limitation in the nanospace of metal-organic frameworks (MOFs), as exemplified by the self-assembly of a metal-organic polyhedral (MOP) M6L4 into MIL-101. This strategy is based on the different hydrophilicities between inner and outer surfaces of the preformed MOF that may direct the self-assembly of the MOP in the MOF pores by using a two-solvent system. Importantly, as the MOP guest molecule is larger than the MOF aperture size, aggregation and leaching are effectively prevented, endowing the encapsulated MOP with significantly enhanced reactivity and stability in the catalytic transformations as compared to the pristine MOP.

Core–shell Pd@Ag nanoparticles are formed within the pores of MOFs via a seed mediated growth strategy with activated hydrogen atoms as the reducing agent, leading to a family of bimetallic core–shell MOF nanomaterials with excelling catalytic performance in room temperature reactions.

A highly efficient, simple, and versatile transition-metal-free metal-organic framework catalytic system is proposed for the oxidative coupling of amines to imines. The catalytic protocol features high activities and selectivities to target products; compatibility with a variety of substrates, including aliphatic amines and secondary amines; and the possibility to efficiently and selectively promote amine cross-coupling reactions. A high stability and recyclability of the catalyst is also observed under the investigated conditions. Insights into the reaction mechanism indicate the formation of a superoxide species able to efficiently promote oxidative couplings.

A simple and versatile synthetic route is develped to modulate the growth and distribution of MOF-graphene oxide (GO) nanohybrid materials, achieving dense and ordered MOFs featuring different sizes and morphologies on GO. After pyrolysis, the resulting metal-containing/rGO nanomaterials demonstrate a superior catalytic activity in organic transformations.

A facile strategy was designed for the encapsulation of C–N-decorated Pd sub-nanoclusters/single atoms into MOF pores by the confined thermolysis of metal–organic polyhedra (MOPs). The obtained hybrids exhibited excellent catalytic performance in various important chemical processes.

Research on reliability of distribution network has very important meaning and function to ensure the quality of power supply. This paper introduces some basic concepts of reliability in distribution network, including distribution network reliability definition, task and index. The classical reliability evaluation method was reviewed, and focused on specific distribution network, an example analysis was given, and specific reliability evaluation indexes were calculated. Finally, the future development of distribution network reliability evaluation was made a simple prospect.

The parallel capacitors are the most important reactive power compensation devices in power system, while the power system harmonic pollution is becoming increasingly serious in recent years, the accident that caused capacitors fault and damage by overload harmonic always happened. Based on this background and summary of the existing research results, thermal effect and performance index of capacitors are introduced, and analyzed the mechanism of interaction between harmonic and capacitor, then the effect and harm of running capacitor under harmonic conditions are elaborated, finally summarized the feasible measures for harmonic suppression and protection of capacitor devices.