Two inorganic–organic hybrid complexes based on bi-capped Keggin-type cluster, {([CuII(2,2′-bpy)2]2[PMoVI8VV2VIV2O40(VIVO)2])[CuI(2,2′-bpy)]}∙2H2O (1) and {[CuII(2,2′-bpy)2]2[SiMoVI8.5MoV2.5VIVO40(VIVO)2]}[CuI0.5(2,2′-bpy)(H2O)0.5] (2) (bpy = bipyridine), had been hydrothermally synthesized and structurally characterized by elemental analysis, FT-IR, TGA, PXRD and X-ray single-crystal diffraction analysis. Compound 1 consists of a novel 1-D chain structure constructed from [CuI(2,2′-bpy)]+ unit linking bi-supported POMs anion {[CuII(2,2′-bpy)2]2[PMoVI8VV2VIV2O40(VIVO)2]}−. Compound 2 is a bi-capped Keggin cluster bi-supported Cu-bpy complex. The main highlights of the two compounds are that Cu-bpy cations contain both CuI and CuII complexes. Furthermore, the fluorescence properties, the catalytic properties, and the photocatalytic performance of compounds 1 and 2 have been assessed, and the results show that both compounds are active for styrene epoxidation and degradation and adsorption of Methylene blue (MB), Rhodamine B (RhB) and mixed aqueous solutions.

A new compound, [ $${\text{Cu}}_{2}^{{{\text{II}}}}$$ Cl(2,2'-Bipy)4]{[CuII(2,2'-Bipy)2][ $${\text{BW}}_{{12}}^{{{\text{VI}}}}$$ O40]}·2H2O (I) (2,2'-Bipy = 2,2'-bipyridine), has been hydrothermally synthesized and characterized by elemental analysis, infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), thermal gravimetric (TG) analysis, power X-ray diffraction (PXRD) and X-ray single-crystal diffraction analysis (CCDC no. 1936106). Compound I consists of a Keggin polyoxotungstate mono-supported CuII-2,2'-Bipy complex, a dinuclear Cl-bridged Cu(II) complex and two water molecules. The [ $${\text{Cu}}_{2}^{{{\text{II}}}}$$ Cl(2,2'-Bipy)4]3+ unit is a counter ion which is anchored to the polyanion via non-covalent intermolecular interaction. In addition, the fluorescence and both the catalytic performance for the epoxidation styrene and the photocatalytic property for degradation of Rhodamine B (RhB), Methylene blue (MB) and RhB + MB aqueous solutions under UV irradiation of compound I have been investigated and shown good properties.

对金属氧簇基光催化剂的设计合成及性能进行了研究.以磷钼酸钠、五氧化二钒、氯化锰和1,2,4-三氮唑为主要原料,利用水热合成技术制得一种簇基杂化材料:{[PMo12O40(VO)2][V(C2N3H3)4]2}·H2O(1)(C2N3H3=1,2,4-三氮唑),采用红外光谱(IR)、元素分析、X-射线粉末衍射(XRD)、X射线光电子能谱(XPS)和X-射线单晶结构分析等对化合物1进行表征.结构分析显示,化合物1是二帽Keggin型簇阴离子{PMo12O40(VO)2}8-经[V(C2N3H3)4]4+配合物阳离子连接成的具有新颖结构的二维层状簇聚物.此外,在不同酸性条件下,研究了化合物1对罗丹明B(Rhodamine B,RhB)的光催化降解能力.

Two new supramolecular complexes, [H3PMo12O40](2 )[C5H6N2](6) (1) and [H2PMo12V2O42] center dot [C5H6N2](5) center dot 3H(2)O( 2) (C5H6N2 = 2-pyridylamine), were synthesized and characterized by means of elemental analysis , infrared spectroscopy (FTIR ), UV-Vis spectrum (UV-Vis), X-ray photoelectron spectroscopy (XPS), thermal gravimetric (TG) analysis , power X-ray diffraction (PXRD) and single-crystal X-ray diffraction analysis. Both of compounds 1 and 2 consisting of different clusters were assembled into 3D inorganic supramoleculae network with different packing modes. In addition, the catalytic properties of two complexes were investigated using the epoxidation of styrene.

对簇基无机-有机杂化材料的合成方法及表征手段进行了研究.采用水热合成技术,以硅钨酸、4,4'-联吡啶、三氧化二锑等为主要原材料合成了一个具有新颖结构的Keggin型簇基无机-有机超分子材料:[SiW12O40][4,4'-Hbpy]2[4,4'-H2bpy]·4H2O(1)(4,4'-bpy=4,4'-联吡啶).通过元素分析、红外光谱、X-射线光电子能谱、荧光及X-射线单晶衍射方法和手段对化合物进行了结构表征.结构分析显示,Keggin型簇阴离子[SiW12O40]4-、质子化的4,4'-bpy和水分子通过氢键作用形成新颖的三维超分子网络.此外,利用罗丹明B模拟有机污染物研究了杂化材料的光催化性能.

In the present research, we produced porous silicon carbide (SiC) scaffolds with lamellar and uniformly distributed structures by unidirectional and quick freeze casting, respectively. Subsequently, we prepared the ZL205A/SiC composites with lamellar and uniformly distributed structures by infiltrating a molten ZL205A alloy into the porous SiC scaffolds. The influence of freezing speed on the damage-tolerance behavior and the toughening mechanism of the resultant composites were investigated. We found that because of multiple toughening mechanisms, the layered composites exhibited much higher strength and toughness as compared with the uniformly distributed composites. The lamellar composites manifested superior specific modulus and a unique combination of specific strength and toughness, which was comparable to those of titanium and magnesium alloys. We also observed that the thicknesses of alloy layers and SiC lamellae of the composites reduced with decreasing cooling temperature in freeze casting. Furthermore, the refinement of lamellae size at higher freezing speeds caused a decrease in the damage-tolerance ability of the composites because of weak toughening effect

对过渡金属掺杂的缺位Keggin型簇基杂化材料的合成方法及表征手段进行了研究.采用水热合成技术制备了一个具有新颖结构的无机-有机杂化材料{K(H2O)2[Cu0.5(en)][CuSiW11O39]}(H2en)2(1,en=乙二胺),利用元素分析、红外光谱、X射线光电子能谱、TG及X射线单晶衍射等技术对晶体结构进行了分析,并对化合物1的光催化性能进行了研究.结构分析显示,簇基杂化材料是由过渡金属掺杂的缺位Keggin型簇阴离子[SiCuW11O39]6-通过(μ-O)单桥氧原子连接成以簇阴离子为结构单元的1-D链,两个相邻的1-D簇阴离子链再经K(H2O)2[Cu0.5(en)]配合物阳离子通过共价键连接成新颖的1-D"梯子"状双链,质子化的乙二胺填充于网络之中.

In this paper,the crystal synthesis and performance of inorganic-organic hybrid materials with metallic oxy-gen cluster were studied. A new cluster-polymers(H2en)2(H3O)12[Si2MoVI14MoV2VV2VIV10O84]1(en=ethylenediamine) has been hydrothermally synthesized and characterized by elemental analysis,IR,XPS,ESR spectrum,TG and sin-gle-crystal X-ray diffraction analysis. Compound 1 is possessed of 1D chain-like structure which was built up dimer with two bicapped Keggin polyoxoanions[Si(1)MoVI6MoV2VIV6O42]10- and[Si(2)MoVI8VV2VIV4O42]6-,which were further in-terconnected via(μ2-O)2 terminal oxygen atoms. Furthermore,through hydrogen bond contacts with water and adjacent 1D cluster polyoxoanion chains,extended 3D polyoxoanions supramolecular networkwas formed in the solid of 1. The protonated H2en2+ and H3O+ cation is located in the holes of the network. The magnetic susceptibility of 1 demonstrated the presence of antiferromagnetic interactions.

Novel bio-inspired ZL205A/SiC composites with a lamellar-interpenetrated structure were successfully fabricated via gas-pressure infiltration of a commercial ZL205A alloy into freeze-cast porous SiC scaffolds. The influences of initial ceramic content (20, 30 and 40 vol%) on the microstructure and damage-tolerance behavior of the resultant composites as well as their toughening mechanism were investigated. With an increase in the ceramic content in the composite, the flexural strength and fracture toughness in the longitudinal direction gradually decreased; whereas, in the transverse direction they showed a first increase and then decrease but their elastic modulus increased. The composites displayed significant damage-tolerance anisotropy, with higher strength and toughness in the longitudinal direction (parallel to the lamellae) than that in the transverse direction (perpendicular to the lamellae). In the longitudinal bending, the ZL205A/20 vol%SiC composite exhibited the maximum flexural strength (760 MPa) and the largest fracture toughness (33.0 MPa m(1/2)). The excellent damage tolerance of the composites was attributed to multiple toughening mechanisms such as plastic deformation in the matrix alloy, crack blunting, deflection and branching, and uncracked-ligament bridging of the ductile alloy layers. However, in the transverse bending, the crack propagated along the ceramic layer in the composites and thus greatly weakened their damage-tolerance capability.

Two new compounds, [Ni(en)2]{[Ni(en)2]2[MoVI 6MoV 2VIV 8O40(SiO4)]}[(NH2)2(C2H4)2NH]·2H2O(1) and [Ni(en)2]{[Ni(en)2]2[MoVI 5MoV 3VIV 8O40(VO4)]}(en)·H2O(2)(en=ethylenediamine), have been hydrothermally synthesized and characterized by elemental analysis, infrared(IR), X-ray photoelectron spectroscopy(XPS), electron spin-resonance(ESR) and thermogravimetric(TG) analysis and single-crystal X-ray diffraction(XRD) analysis. Both the compounds exhibit a 1D chain composed of bi-supporting tetra-capped Keggin clusters and nickle coordination fragments. The 1D chains are further assembled into a 3D supramolecular network with different packing modes via hydrogen bonds. The magnetic susceptibility of compound 1 demonstrates the presence of antiferromagnetic interactions.

Two supramolecular compounds based on Keggin polyoxotungstates, (4,4′-H2bpy){[Cu(4,4′-bpy)]2[SiW12O40]} (1) and (4,4′-H2bpy)2[SiW12O40]·2H2O (2) have been synthesized and characterized by elemental analyses, IR, UV, XPS spectra, TG analyses, and single crystal X-ray diffraction analyses. Compound 1 exhibits an infinite 1-D ladder like structure, which is further interconnected into a 3-D supramolecular framework via hydrogen bonding interactions. Compound 2 contains 4,4′-bipyridine (4,4′-bpy), pseudo-Keggin polyoxoanions [SiW12O40]4−, and water molecules. Polyoxoanions together with water molecules in 2 construct a 3-D inorganic supramolecular network through O···O and O···Ow(1) interactions. The electrochemical behaviors and photocatalytic properties of 1 and 2 have been investigated.

材料物理是一门兼备理论性与实践性的课程，是学生将来从事科研和工作不可或缺的专业基础课。结合建筑类院校材料物理课程的特点，提出教学内容应该特色化、信息技术化和一体化的原则；教师应根据专业特点和学生实际需要，充分利用多媒体教学手段，采用案例式教学方法；教学中激发学生的学习动力，训练学生的专业素质，为走向社会储备专业知识和创新能力。

《材料研究方法与测试技术》是普通高校材料科学与工程专业一门具有重要学科意义且实用性极强的公共技术基础课程之一。本文从材料专业的发展和对材料人才的需求出发，以提高学生学习能力、实践能力、创新能力为目的，对材料科学与工程专业《材料研究方法与测试技术》课程的教学内容、教学方法、教学手段和实验教学模式等方面的建设与改革进行了探讨。

材料物理的实验教学是学生掌握材料物理性能的基本理论、材料分析手段和提高实验技能的重要手段。在实验教学中优化教材、精心设计实验，体现建筑特色、开展探索性实验、完善考核手段，是培养具有创新精神及严肃认真、实事求是科学作风的新型高素质人才的重要途径。

A new compound, [Cu(en)2]2[WⅥ4.5WV2 VVVⅣ9.5O44{Cu(en)2(H2O)}2]·3H2O(1, en=ethy- lenediamine) , was hydrothermally synthesized and characterized by elemental analysis, Fourier transform infrared spectroscopy ( FTIR ) , X-ray photoelectron spectroscopy ( XPS ) , electron paramagnetic resonance (ESR), X-ray diffraction analysis(XRD), thermogravimetric(TG) analysis and single-crystal X-ray diffrac- tion analysis. Compound 1 represents a 2D layer structure constructed from tetra-capped bi-supporting Keggin tungstovanadates and transition metal complexes. Adjacent layers are further interconnected into a 3D supra- molecular structure via hydrogen bonds. The magnetic susceptibility of compound 1 demonstrates the presence of ferromagnetic interactions. In addition, the photocatalytic activity of compound 1 for the phtodegradation of Rhodamine B( RhB) was also investigated.

本科生导师制是我国普通高校加强个性化教育、实行学分制后积极探索实践的一项旨在培养具有创新精神和创新能力的优秀人才的新型教育管理模式。本文介绍了本科生导师制的起源、作用和意义、运行效果及存在的问题，阐述了本科生导师制改革的必要性，并提供完善和优化班导师制度的措施。

A new compound, [Cu(en)(2)](2)[(W4.5W2VV9.5O44)-W-VI-V-V-V-V-O-IV{Cu(en)(2)(H2O)}(2)]center dot 3H(2)O(1, en = ethylenediamine), was hydrothermally synthesized and characterized by elemental analysis, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (ESR), X-ray diffraction analysis(XRD), thermogravimetric (TG) analysis and single-crystal X-ray diffraction analysis. Compound 1 represents a 2D layer structure constructed from tetra-capped bi-supporting Keggin tungstovanadates and transition metal complexes. Adjacent layers are further interconnected into a 3D supramolecular structure via hydrogen bonds. The magnetic susceptibility of compound 1 demonstrates the presence of ferromagnetic interactions. In addition, the photocatalytic activity of compound 1 for the phtodegradation of Rhodamine B (RhB) was also investigated.

The fluorescent carbon nanoparticles (average diameter: 10~50 nm) are prepared by using a simple and eco-friendly hydrothermal process, and show a stronge blue emission. The fluorescence of the water soluble carbon nanoparticles could be quenched effectively by H 2 O 2 without obvious shift in maximum photoluminescence emission wavelength, which can be used for the detection of H 2 O 2 .

A new supramolecular compound, [Co (en)3]2[H3PMo8V6O42]∙5H2O (1) has been hydrothermally synthesized and structurally characterized by the elemental analysis, IR and single crystal X-ray diffraction. Compound 1 consists of [Co (en)2]2+ transition metal coordination fragment, [H3PMo8V6O42]4- building blocks and crystal water molecules, which are linked together via hydrogen-bonding interactions to form a new 3-D supramolecular networks. The degradation of methylene blue (MB) under UV-vis irradiation with 1 as the heterogeneous photocatalyst has been investigated, showing a good photocatalytic property of 1 for MB degradation.

A 1-D chain-like POM - based organic-inorganic hybrid compound with the chemical formula of [Ni (en)2]{[Ni (en)2]2[Mo8V8O40(VO4)]}[(NH2)2(C2H4)2NH]2·2H2O (en = ethylenediamine) (1) has been hydrothermally synthesized and structurally characterized by the elemental analysis, and single crystal X-ray diffraction. Compound 1 consists of the bi-supported tetra-capped Keggin-type {[Ni (en)2]2[Mo8V8O40(VO4)]}2-building blocks and [Ni (en)2]2+metal organic cationic moieties are connected together to form 1-D chain through covelent-bonding interactions, which is further linked into 3-D supramolecular networks . The degradation of methylene blue (MB) under UV irradiation with 1 as the heterogeneous photocatalyst has been investigated, showing a good photocatalytic property of 1 for MB degradation.