摘要：Layered inorganic materials provide an essential platform for constructing new structural configurations of materials with exceptional ***,precise control over the interlayer molecular arrangement remains a significant challenge,impeding in-depth exploration in physics and chemistry ***,we demonstrated a new layered organic-inorganic superlattice composed of a S-Ta-S inorganic lattice and bilayer linear molecules,providing superhigh heat insulation.A series of interlayer-confined intercalations of alkylamines with increasing chain length in the layered inorganic materials were achieved through precisely ordered molecule design(TaS_(2)-Cn,n=3,6,8,12).Systematic spectral analysis reveals that as the length of the intercalated alkyl chain increases,the alkyl chain between layers becomes more ordered and linear,and the gauche conformation ***,the more linear and ordered alkyl chain conformation results in lower thermal *** thermal conductivity of TaS_(2)-C12 is 0.426 W m^(−1) K^(−1),which is only one-third that of the pristine TaS_(2) *** anticipate that this layered organic-inorganic superlattice design will pave a new avenue for developing new organic-inorganic functional materials and probing the limits of ultralow thermal conductivity materials.

摘要：新型冠状病毒感染引起的新冠肺炎传播已经导致了全世界数百万人的死亡。因此,深入了解新冠病毒的生物学基础对研发控制其传播的新手段至关重要。新冠病毒的核衣壳蛋白(N蛋白)是一个重要的诊断和治疗靶点,它在病毒生命周期中具有多种重要功能。目前已有多个关于新冠病毒N蛋白的结构与功能方面的研究报道。本综述总结了这个进化上高度保守的N蛋白的最新数据,以期提供有关该蛋白的结构和多种功能特征的全面信息。

摘要：α-Diimide catalysts have attracted widespread attention due to their unique chain walking characteristics.A series ofα-diimide nickel/palladium catalysts with different electronic effects and steric hindrances were designed and synthesized for olefin *** this work,we synthesized a series of asymmetricα-diimide nickel complexes with different steric hindrances and used them for ethylene *** nickel catalysts have high ethylene polymerization activity,up to 6.51×10^(6)g·mol^(−1)·h^(−1),and the prepared polyethylene has a moderate melting point and high molecular weight(up to 38.2×10^(4)g·mol^(−1)),with a branching density distribution between 7 and 94 branches per 1000 *** importantly,the polyethylene prepared by these catalysts exhibits excellent tensile properties,with strain and stress reaching 800%and 30 MPa,respectively.