Three new Cu(i) based metal halides with excellent optical properties were developed by rational structural design, and a high-performance WLED was fabricated with the resulting material.

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The design of microwave absorbent with hierarchical interfacial structure has become one of the effective methods to scatter microwaves. Metal/carbon composites deriving from metal−organic frameworks (MOFs) have attracted considerable attention...

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Low-concentration ethane capture is crucial for environmental protection and natural gas purification. The ideal physisorbent with strong C 2 H 6 interaction and large C 2 H 6 uptake at low-concentration level has rarely been reported, due to the large pK a value and small quadrupole moment of C 2 H 6 . Herein, we demonstrate the perfectly size matching between the ultramicropore (pore size of 4.6 Å) and ethane (kinetic diameter of 4.4 Å) in a nickel pyridine-4carboxylate metal-organic framework (IISERP-MOF2), which enables the record-breaking performance for low concentration C 2 H 6 capture. IISERP-MOF2 exhibits the large C 2 H 6 adsorption enthalpy of 56.7 kJ/mol, and record-high C 2 H 6 uptake at low pressure of 0.01-0.1 bar and 298 K (1.8 mmol/g at 0.01 bar). Molecule simulations and C 2 H 6loading crystal structure analysis revealed that the maximized interaction sites in IISERP-MOF2 with ethane molecule originates the strong C 2 H 6 adsorption. The dynamic breakthrough experiments for gas mixtures of C 2 H 6 /N 2 (1/999, v/v) and C 2 H 6 /CH 4 (5/95, v/v) proved the excellent low-concentration C 2 H 6 capture performance.Ethane (C 2 H 6 ) has been proved harmful to the atmosphere and human health, as suggested by the American Conference of Governmental Industrial Hygienists (threshold limit of 1000 ppm). [1] The total global ethane emissions to the air are estimated at 10-13 teragrams (1 Tg = 10 12 g) per year. [2] The main source of ethane in the air comes from the inevitable release from production, processing, transmission, and use of natural gas (mainly CH 4 , 5-10 % for C 2 H 6 ). [1,3] Low concentration C 2 H 6 capture from air and natural gas is vital for controlling the C 2 H 6 level, however rarely investigated. Compared to traditional distillation technology with large energy input, physisorption based separation process could be a better alternative to address this issue owing to its fast sorption kinetics and low regeneration energy.Relatively chemical inertness of ethane (small quadrupole moment and large pK a : 0.65 × 10 À 26 esu cm 2 and 50) make it only strongly adsorbed in porous material by effective superposition of weak Van der Waals and hydrogen bonding interaction, in which pore size is a very important factor. [4] The exquisite pore structure control (pore size and pore chemistry) endows the new type of porous material (metal-organic framework/MOF, [5] also noted as metal-organic material/MOM [6] or porous coordination polymer/PCP) [7] with the significant power to manipulate these weak interaction sites inside to enhance C 2 H 6 adsorption. [8] For MOF structure with much larger pore size (c. a. > 7 Å, Figure 1a) than kinetic diameter of ethane molecule [a

In the early days of the founding of the People's Republic of China, the hot issues of Ethnic minority bilingual education was creating and improving written languages for ethnic minorities; since the reform and opening up period, was the popularization of mandarin and bilingual teaching; Since the new century, the focus has been on language protection. By describing the development and evolution of the hot issues of minority bilingual education, it reflects the change of language view from "rights" to "resources", discusses that the language rights view and the language resources view are the focus in different periods. National policy, the development of linguistics theory and the evolution of the hot issues of ethnic minority bilingual education are the three reasons for the change of language view.

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