新一代信息基础设施推动能源发展的路径安排和绩效研究

随着信息技术的迅猛发展,其带来的变革浪潮涌动在各个角落。作为社会的运行动脉,能源的产生运转和利用体系享受新一代信息基础设施的优势,发生着巨大变化。文章研究了新一代信息基础设施对于能源革命的推动传导方式的影响,分析了在这一过程中新一代信息基础设施普及对能源行业及能源使用方式的影响。基于过往信息化数据、已有理论及当下流行的5G运用方式,做回溯性探究,前瞻未来能源革命的蓝图。     

Highly stretchable,self-adhesive,and self-healable double network hydrogel based on alginate/polyacrylamide with tunable mechanical properties

A number of synthetic hydrogels suffer from low mechanical strength. Despite of the recent advances in the fabrication of tough hydrogels, it is still a great challenge to simultaneously construct high stretchability, and self-adhesive and self-healing capability in a hydrogel. Herein, a new type of double network hydrogel was prepared based on irreversible cross-linking of polyacrylamide chains and Schiff-base reversible cross-linking between glycidyl methacrylate-grafted ethylenediamine and oxidized sodium alginate (OSA). The combination of both cross-linkings and their synergistic effect provided a novel hydrogel with high strength, stretchable, rapid self-healing, and self-adhesiveness to different material. Besides, the hydrogels with diverse OSA content could maintain their original shapes after loading–unloading tensile test. The resulting hydrogel has a great potential in various fields for supporting and load-bearing substance.     

Unveiling the binding interaction of zinc (II) complexes of homologous Schiff-base ligands on the surface of BSA protein: A combined experimental and theoretical approach

Four new zinc (II) complexes [Zn (HL¹H)Br₂] (1), [Zn (HL¹H)Cl₂] (2), [Zn₂(HL²)Br₃] (3), and [Zn (HL²)Cl] (4) have been synthesized by adopting template synthetic strategy and utilizing two homologous Schiff base ligands (H₂L¹ = 4-bromo-2-{[2-(2-hydroxyethylamino)-ethylimino]-methyl}-6-methoxyphenol, H₂L² = 4-bromo-2-{[3-(2-hydroxyethylamino)propylimino]methyl}-6-methoxyphenol), differing in one -CH₂- unit in the ligating backbone, by adopting template synthetic strategy. All the complexes have been characterized by single crystal X-ray diffraction analysis as well as by other routine physicochemical techniques. Ligand mediated structural variations have been observed and rationalized by density functional theoretical (DFT) calculations. Interaction of the complexes 1–4 with Bovine Serum Albumin protein (BSA) has been studied by different spectroscopic techniques. A complete thermodynamic profile (ΔH^o, ΔS^o and ΔG^o) was evaluated initially from the change in absorption and fluorescence spectra upon addition of BSA to the complexes. Appreciable binding constant values in the range ~ 0.94–4.51 × 10⁴ M⁻¹ indicate efficient binding tendency of the complexes to BSA with the sequence 1 ≅ 2 > 3 ≅ 4. Circular dichroism (CD), isothermal calorimetric titration experiments, molecular docking and molecular dynamics have been performed to gain deep insight into the binding regions of complex 1 to BSA. Experimental evidences suggest an interaction of zinc complexes at the surface of BSA protein and this particular binding has been exploited to determine unknown concentration of BSA protein. For this purpose complex 1 was explored as a BSA protein quantification tool.     

Synthesis,structural, spectroscopic,and thermal studies of some transition-metal complexes of a ligand containing the amino mercapto triazole moiety

A new series of transition-metal complexes of Schiff base ligand containing the amino mercapto triazole moiety ( HL ) was prepared. The Schiff base and its metal complexes were elucidated by different spectroscopic techniques (infrared [IR], ¹H nuclear magnetic resonance, UV–Visible, mass, and electron spin resonance [ESR]), and magnetic moment and thermal studies. Quantum chemical calculations have been carried out to study the structure of the ligand and some of its complexes. The IR spectra showed that the ligand is chelated with the metal ion in a neutral, tridentate, and bidentate manner using NOS and NO donors in complexes 1 – 6 , 10–12 , and 7 and 8 , respectively, whereas it behaves in a monobasic tridentate fashion using NOS donor sites in copper(II) nitrate complex ( 9 ). The magnetic moment and electronic spectra data revealed octahedral and square pyramidal geometries for complexes 2 , 11 , 12 , and 5 – 8 and 10 , respectively. However, the other complexes were found to have tetrahedral ( 4 ), trigonal bipyramidal ( 1 and 3 ), and square planar ( 9 ) structures. Thermal studies revealed that the chelates with different crystallized solvents undergo different types of interactions and the decomposition pathway ended with the formation of metal oxygen (MO) and metal sulfur (MS) as final products. The ESR spectrum of copper(II) complex 10 is axial in nature with hyperfine splitting with ²B_1g as a ground state. By contrast, complexes 7 and 8 undergo distortion around the Cu(II) center, affording rhombic ESR spectra. The HL ligand and some of its complexes were screened against two bacterial species. Data showed that complex 12 demonstrated a better antibacterial activity than HL ligand and other chelates.     

基于紧耦合结构的宽带基站天线设计

随着5G移动通信频段的公布,传统基站天线已不足以覆盖其工作频段。文章以紧耦合阵列天线理论为基础,提出了一种基于紧耦合结构的交叉偶极子宽带基站天线。该天线由两对正交的领结状偶极子天线构成,通过两对交叉偶极子之间的耦合效应,有效地展宽了天线的阻抗带宽。同时,通过在天线和金属反射板之间加载电阻型频率选择表面,吸收由反射板引入的谐振反射波,改善天线高频端辐射性能。仿真及测试结果表明:该天线在1.7-3.6 GHz 频率范围内,可以满足基站天线的设计指标,两端口驻波比均小于1.5,两端口之间隔离度大于55 dB,半功率波束宽度满足65°±5°范围,且整个频段内增益均大于8.5 dBi。     

Synthesis and characterization of copper(II) Schiff base complex supported on Fe3O4 magnetic nanoparticles: a recyclable catalyst for the one‐pot synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones

Fe₃O₄–Schiff base of Cu(II) is found to be a recyclable and heterogeneous catalyst for the rapid and efficient synthesis of various 2,3‐dihydroquinazolin‐4(1H)‐one derivatives from the two‐component condensation of 2‐aminobenzamide and an aldehyde. This reaction is simple, green and cost‐effective. Separation and recycling can also be easily done by magnetic decantation of the Fe₃O₄ nanoparticles with an external magnet. The prepared catalyst was characterized using thermogravimetry, Fourier transform infrared spectroscopy, vibrating sample magnetometry, inductively coupled plasma analysis, X‐ray diffraction and scanning electron microscopy. Copyright © 2015 John Wiley & Sons, Ltd.     

Structure and characterization of O,O-diethylthiophosphorylhydrazine o-vanillin Schiff base nickel(II) complex: NiC24H36N4O8P2S2

The crystal and molecular structure of the complex of Ni[(C₂H₅O)₂PSNHNCPh(o-O)OMe]₂ has been determined by X-ray crystallography. The compound crystallizes in the monoclinic system, space group P2₁/n, with lattice parameters a = 14.805(3), b = 7.9550(16), c = 15.176(3) Å, = 117.94(3), and Z = 2. The unit cell contains two centrosymmetric molecules of O,O-diethylthiophosphorylhydrazine o-vanillin Schiff base nickel(II). The nickel(II) ion is coordinated in a slightly distorted trans square-planar configuration, the distortion consisting of a reduction of the N—Ni—O angle with the chelate rings from the ideal value of 90° to 87.69°. The coordination geometry of nickel(II) is square planar with two equivalent Ni—N and Ni—O bonds. The two phenyl rings and the phosphorylhydrazine moieties are in one plane forming an extensive delocalized system. Within each molecule, the two ligands are linked by a pair of N—H···O hydrogen bonding interactions. In the solid state, the title compound form a hydrogen bonding network through C—H···O intermolecular hydrogen bonding.     

两个一维之字链异三金属配位聚合物的合成、结构和磁性

用分步合成法得到了2个结构新颖的一维之字链异三金属配位聚合物{[Cu(Me_2valpn)Dy(DMF)_2(H_2O)Fe(CN)_6]·1.5H_2O·0.5CH_3OH}n(1)和{[Cu(Me_2valpn)Tb(DMF)_2(H_2O)Fe(CN)_6]·H_2O·CH_3OH}n(2)(H_2Me_2valpn=N,N′-双(3-甲氧基-水杨醛)缩-2,2-二甲基-1,3-丙二胺)。X射线单晶衍射分析表明每个[Fe(CN)_6]3-用顺式的2个氰根分别连接2个相邻构筑单元[Cu(Me_2valpn)Ln(DMF)_2(H_2O)]_3+的Cu(Ⅱ)和Ln(Ⅲ)。除了Cu(Ⅱ)和Ln(Ⅲ)之间的双酚氧桥之外,链中还包含Fe-C≡N-Cu和Fe-C≡N-Ln两类弯曲的桥联结构。配合物1在9.5~300 K的直流变温磁化率数据符合居里-韦斯定律,韦斯常数(θ)为13.17 K,表明配合物1总体上表现铁磁相互作用。交流磁化率测试表明配合物1没有表现出缓慢磁弛豫现象。     

席夫碱类三明治型铽/镝金属配合物的合成、表征及磁性

以N,N′-二(4-甲氧基水杨基)邻苯二胺(H2L)为配体合成了2个新的稀土配合物[M_2L_3(H_2O)](M=Tb (1),Dy (2)),并对它们进行了红外分析、元素分析和单晶结构分析。单晶衍射结果表明,配合物1和2均为三明治型双核配合物。此外还研究了配合物1和2的磁学性质,结果表明配合物1和2都表现出反铁磁性作用和场诱导效应引起的慢弛豫行为。配合物2的有效能垒和驰豫时间分别为35.45 cm-1和2.7×10~(-10) s。     

Organic superbase-induced chemiluminescent decomposition of a hydroxyaryl-substituted dioxetane: Unique effect of a bifunctional guanidine base on the chemiluminescence profile of a bicyclic dioxetane bearing a 4-(benzoxazol-2-yl)-3,5-dihydroxyphenyl moiety

Organic superbases represented by TBD (1,5,7-triazabicyclo[4.4.0]dec-5-ene) effectively induced the decomposition of hydroxyaryl-substituted dioxetanes in acetonitrile to give bright light. The color of the chemiluminescence from a dioxetane bearing a 4-(benzoxazol-2-yl)-3,5-dihydroxyphenyl moiety varied depending on the base used. In addition to this change in the color of emission, TBD increased the chemiluminescence efficiency 2- to 5-fold compared to the results with other base systems and accelerated decomposition of the dioxetane. These unique effects of TBD may be due to its “bifunctional” character, which is different from those of other organic superbases. Chemiluminescent decomposition of the dioxetane was effectively induced by superbases even in apolar p-xylene.