基于5-(4-羟基吡啶基甲基)间苯二甲酸配体的两种Zn(Ⅱ)的配位聚合物的合成、结构和荧光性质

采用水热合成的方法,在以5-（4-羟基吡啶基甲基）间苯二甲酸（H₂L）作主配体、4,4''-联吡啶（4,4''-bpy）和1,2-二（4-吡啶基）乙烯（bpe）作辅配体的条件下,得到2种新颖的Zn（Ⅱ）配位聚合物{[Zn（L）（4,4''-bpy）_0.5]·2H₂O}_n（1）和{[Zn（L）（bpe）_0.5]·2H₂O}_n（2）。配合物通过单晶X射线衍射的方法进行了结构分析,并进一步通过红外光谱（IR）、元素分析、PXRD和热重分析（TG）的方法进行了表征。结构分析表明配合物1展现出的是一种三维三重互穿网络;聚合物2为二维双层结构,并进一步组合成了三重平行互穿的2D→3D的空间网络。此外,研究了配合物的荧光性质。     

两个三维柱层式单一手性配位化合物:合成、结构和性质（英文）

在溶剂热合成条件下得到2个单一手性配位聚合物,即[Cd3((R)-CIA)2(bipy)2.5(H2O)2]·xGuest(1)和[Zn3((R)-CIA)(bmib)2(H2O)2 Cl]·H2O·xGuest(2)((R)-H3CIA=(R)-5-(1-羧基乙氧基)间苯二甲酸,bipy=4,4′-联吡啶,bmib=1,4-双(2-甲基-1H-咪唑-1-基)苯)。X射线单晶结构分析揭示配合物1和2都是柱层式结构的三维框架。从拓扑分析的角度看,配位物1具有(3,3,3,6,6)-连接的网络,拓扑符号为(4.5^2)2(4.8^2)2(42.6^8.8^3.10^2)(4^2.6^8.8^3.9^2)(5.8.9)2,而配合物2是(3,4,4)-连接的网络,拓扑符号为(6·7^2)2(6·7^5)2(6^2·7^4)。此外,对上述配合物的热稳定性、圆二色谱和荧光性质也做了研究。     

多酸基金属-有机框架的构筑及其催化性能

在水热条件下合成了两个基于Keggin型磷钨酸盐的金属-有机框架化合物(MOFs)[Er_2H(μ-O)_2(dpdo)_4(H_2O)_2][PW_(12)O_(40)]·3H_2O(1)和[Tm_2H(μ-O)2(dpdo)4(H_2O)_2][PW_(12)(O_(40)]·3H_2O(2)(dpdo=4,4′-bis(pyridine-N-oxide),并通过元素分析、红外光谱(IR)、紫外光谱(UV)及单晶X射线衍射(XRD)的方法对其进行了结构表征.此外,通过紫外-可见分光光度法,在EPPS缓冲溶液中,考察了两种化合物在非均相体系中催化DNA模型磷酸二酯双(对硝基苯酚)磷酸二酯(BNPP)的水解进程.催化结果表明,在50℃,pH=4的条件下,两种催化剂对BNNP催化的一级水解裂解速率为10-7~10-6 s-1,最终产物为无机磷酸盐和对硝基苯酚.此外,该催化体系具有很好的重现性,并且催化剂可循环使用.     

八面体纳米笼构筑的金属-有机框架化合物

利用半刚性的三足羧酸配体1,3,5-tris[3-(carboxyphenyl)oxamethyl]-2,4,6-trimethylbenzene acid (H₃TBTC)与金属离子自组装成功合成了两例八面体纳米笼构建的金属-有机框架化合物: {[Zn₃TBTC₂(DMA)(H₂O)]·3DMA·3H₂O}_n (1), {[Cd₃TBTC₂(DMA)₂(H₂O)₂]·2DMA·2H₂O}_n (2). TBTC^3-配体在化合物中呈现出cis,cis,cis-和cis,trans,trans-两种构型. cis,cis,cis-构型的TBTC^3-配体与Zn₃(COO)₆次级结构基元(secondary building units, SBUs)构筑了畸变的八面体金属-有机纳米笼, 因而化合物的结构可以看成是八面体金属-有机纳米笼作为超分子构建单元(supramolecular building blocks, SBBs), 在空间上与cis,trans,trans-构型的配体相连, 最终形成具有(3,18)-连接的三维无限网络. 荧光测试结果表明, 化合物1～2的荧光都是基于配体的发射. 相对于配体的发射光谱, 化合物1～2的发射光谱展现出蓝移的现象. 气体吸附测试结果表明, 化合物1～2具有选择性吸附二氧化碳的能力.     

基于羟乙氧基间苯二甲酸配体的Cd(Ⅱ)和Pb(Ⅱ)金属有机框架的合成、晶体结构及荧光性质

以5-（2-羟乙氧基）-1,3-苯二甲酸二甲酯（Me₂L）为配位前驱物分别与二水合醋酸镉和三水合醋酸铅在水热条件下发生原位水解-配位反应,得到2个基于5-（2-羟乙氧基）-1,3-苯二甲酸配体和Cd（Ⅱ）或Pb（Ⅱ）的三维金属有机框架化合物{[Cd（L）（H₂O）₂]·1.5H₂O}_n（1）和[Pb（L）·H₂O]_n（2）。对这2个化合物进行了红外、元素分析和X射线单晶衍射分析,获得了其单晶结构并进一步使用X射线粉末衍射技术证明了所获得的产物具有单一晶相。对比固态下配体和2个金属有机框架化合物的荧光发射性质,能发现金属有机框架化合物较配体有了较大的红移,且红移程度与金属离子种类有关,Pb（Ⅱ）离子构建的金属有机框架化合物具有更大的红移程度。     

基于5-(4-羟基吡啶基甲基)间苯二甲酸配体的两种Zn(Ⅱ)的配位聚合物的合成、结构和荧光性质

采用水热合成的方法,在以5-（4-羟基吡啶基甲基）间苯二甲酸（H₂L）作主配体、4,4’-联吡啶（4,4’-bpy）和1,2-二（4-吡啶基）乙烯（bpe）作辅配体的条件下,得到2种新颖的Zn（Ⅱ）配位聚合物{[Zn（L）（4,4’-bpy）_0.5]·2H₂O}_n（1）和{[Zn（L）（bpe）_0.5]·2H₂O}_n（2）。配合物通过单晶X射线衍射的方法进行了结构分析,并进一步通过红外光谱（IR）、元素分析、PXRD和热重分析（TG）的方法进行了表征。结构分析表明配合物1展现出的是一种三维三重互穿网络;聚合物2为二维双层结构,并进一步组合成了三重平行互穿的2D→3D的空间网络。此外,研究了配合物的荧光性质。     

制备金属-有机框架材料的教学实验设计*

为了探索新型的“材料化学实验”课堂教学案例,对铜基多孔金属-有机框架材料(Cu-MOF)的制备条件进行精心优化和设计,使其满足实验课堂教学的要求。以5-氨基间苯二甲酸(AIPA)为配体分别和不同阴离子铜盐(如硝酸铜、三氟甲磺酸铜、氯化铜、硫酸铜)配位。为了降低实验成本、能耗和提高反应产率,通过优化实验条件,探究适合材料化学实验教学的最佳物料配比、反应温度和反应时间等条件,并对所得产物进行粉末X射线衍射(PXRD)测试,表征材料的相纯度。课堂实践表明,学生对晶态材料的实验方法和表征手段表现出浓厚的学习兴趣。     

金属-有机框架色谱固定相的研究进展

金属-有机框架材料(Metal-Organic Frameworks,MOFs),又称为多孔配位聚合物(Porous Coordination Pol-ymers,PCPs),是一类由金属离子与多齿有机配体通过配位键组装形成的网状结构的配位聚合物。由于具有比表面积高、热稳定性、机械稳定性和化学稳定性好和孔的可调性等特性,使其分析化学领域表现出了诱人的应用前景。本文综述了所有有关金属-有机框架色谱柱的研究进展。主要从色谱柱的类型方面进行论述,分析了不同类型色谱柱的优缺点。重点介绍了几种金属-有机框架色谱柱对芳香烃和烷烃的分析,并对MOFs色谱柱的发展方向和应用前景进行了展望。     

新型三维金属-有机骨架[Er2（HO-bdc）2（m-bdc）（phen）]·3H2O的水热合成及晶体结构（英文）

以5-羟基间苯二甲酸(HO-H2bdc)、5-甲基间苯二甲酸(m-H2bdc)和1,10-菲啰啉(phen)为配体,在水热条件下合成了饵金属-有机骨架[Er2(HO-bdc)2(m-bdc)(phen)].3H2O。通过X-射线单晶衍射仪测定其晶体结构,结果表明该化合物包含一个三维[Er2(HO-bdc)2(m-bdc)(phen)]框架,而结晶水分子位于其中。该化合物中丰富的氢键作用和1,10-菲啰啉芳香环之间的π-π堆积作用进一步稳固了其三维结构。     

铂纳米颗粒修饰的多孔卟啉基金属-有机框架化合物高效光催化产氢

通过双溶剂法及其后续的光还原法成功地将2.5 nm的Pt纳米颗粒嵌入到卟啉基金属-有机框架化合物PCN-222的介孔中（Pt@PCN-222）。该复合材料Pt@PCN-222上的卟啉官能团可以有效地吸收可见光并促进光解水制氢,氢气产量为253μmol ·g^-1·h^-1。     

一个具有杂金属链和蜂巢状纳米孔道结构的三维配位聚合物的合成与表征

在溶剂热条件下,用预先合成的5-羟甲基间苯二甲酸(H_2HIA)与Zn2+及K+反应构建出1个具有三维开放框架结构的配位聚合物[Zn_(0.5)K_(0.5)(HIA)(H_2O)]·x Guest(1).在配合物1中,Zn~(2+),K~+与H_2HIA构建出了无限长的杂金属链和具有亲水表面的蜂巢状纳米孔道.粉末X射线衍射和热失重分析结果表明,配合物1为纯相,330℃后有机体开始分解.此外,对配合物1的荧光性质也进行了研究.     

Construction of three new metal-organic frameworks with distinct SBUs: trinuclear {Cd3(COO)6} clusters,inorganic -Cd-O-Cd- chains,and heterometallic trinuclear {Cd2Ba(COO)4} clusters

Three metal-organic frameworks (MOFs), [Cd₃(OABDC)₂(e-urea)₄]_n (1), [Cd₃(OABDC)₂(H₂O)₅)]_n (2) and [Cd₂Ba(OABDC)₂(H₂O)₇]_n (3) (H₃OABDC = 5-oxyacetate isophthalic acid, e-urea = 2-imidazolidinone), were prepared using H₃OABDC and metal salts. Single-crystal X-ray diffraction analyses reveal that 1 features a 2-D layered structure constructed from trinuclear {Cd₃(COO)₆} SBUs and represents a (3,6)-connected kgd topology. Compounds 2 and 3 are 3-D inorganic–organic hybrid frameworks; 2 employs infinite inorganic –Cd–O–Cd– chains as SBUs, whereas (3,6)-connected ant-type 3 employs heterometallic trinuclear {Cd₂Ba(COO)₄} clusters as SBUs. The structures of these three compounds indicate that the SBUs play an important role in the construction of MOFs. Moreover, the thermal stabilities and solid-state photoluminescent properties of these three compounds have also been investigated.     

Aromatic polyisophthalamides with N-benzylidene pendant groups

A new series of modified polyisophthalamides bearing N-benzylidene pendant groups was prepared by reacting various aromatic diamines with 5-(N-benzylidene) isophthalic acid. The latter was synthesized from the reaction of 5-aminoisophthalic acid with benzaldehyde and characterized by IR and ¹H-NMR spectroscopy. Triphenyl phosphite and pyridine was used as condensing agents for preparing polyamides. In addition, the corresponding unsubstituted polyisophthalamides were prepared under identical experimental conditions for comparative purposes. Characterization of modified polyamides was accomplished by IR as well as inherent viscosity measurements. They showed a slightly lower solubility in various media than the corresponding unsubstituted polyamides. The cured modified polyamides displayed significantly higher thermal stability than the cured unsubstituted polyamides. They were stable up to 355–308°C in N₂ or air and afforded anaerobic char yield of 66–61% at 800°C. © 1992 John Wiley & Sons, Inc.     

基于一种柔性和角型有机芳香多酸配体的两种3D配位聚合物的合成、结构和荧光性

通过水热合成的方法制得具有三维超分子结构的2种配位聚合物{[Zn（L）（bpa）_0.5（H₂O）₂]·2.25H₂O}_n （1）和{[Cd（L）（H₂O）]·2H₂O}_n （2）,其中,H₃LCl为氯化5-（4-羟基吡啶基甲基）间苯二甲酸,bpa为1,2-二（4-吡啶基）乙烷。这2种化合物的结构通过单晶X射线衍射、红外光谱（IR）、元素分析、热重分析（TG）等方法进行了表征。结构解析表明：化合物1是一种梯型链式结构,并通过链间氢键作用延伸成了3D超分子网络;化合物2为含有大量一维隧道空腔的2D配位网络。此外,研究了这2种化合物的荧光性质。     

基于一种柔性和角型有机芳香多酸配体的两种3D配位聚合物的合成、结构和荧光性

通过水热合成的方法制得具有三维超分子结构的2种配位聚合物{[Zn（L）（bpa）_0.5（H₂O）₂]·2.25H₂O}_n（1）和{[Cd（L）（H₂O）]·2H₂O}_n（2）,其中,H₃LCl为氯化5-（4-羟基吡啶基甲基）间苯二甲酸,bpa为1,2-二（4-吡啶基）乙烷。这2种化合物的结构通过单晶X射线衍射、红外光谱（IR）、元素分析、热重分析（TG）等方法进行了表征。结构解析表明：化合物1是一种梯型链式结构,并通过链间氢键作用延伸成了3D超分子网络;化合物2为含有大量一维隧道空腔的2D配位网络。此外,研究了这2种化合物的荧光性质。     

A twofold interpenetrated 3-D Cu(II) coordination polymer based on 5-(pyridin-4-yl)isophthalic acid: synthesis,crystal structure,and magnetic properties

A new copper(II) coordination polymer, [Cu(PIA)·2H₂O]_n (1) [H₂PIA = 5-(pyridin-4-yl)isophthalic acid], has been synthesized and characterized by elemental analysis, IR spectroscopy, TGA, powder, and single-crystal X-ray diffraction. Structural analysis shows that each PIA^2? in 1 bridges three Cu(II) ions, and likewise each Cu(II) ion connects to three PIA^2? ligands, giving a 3-D framework with utp topology and left-/right-handed helical channels. Interestingly, two such identical frameworks interlock with each other to generate a twofold interpenetrated structure that is stabilized by hydrogen bonding and π–π interactions. In addition, the thermal stability and the magnetic properties of 1 have been investigated.     

Syntheses,structure and characterization of a fourfold interpenetrated 3D Cd(II) organic framework constructed with a zwitterionic ligand

A 3-D cadmium(II) organic framework with a fourfold interpenetrated diamond topological structure, {[CdLBDC]·(H₂O)₂}_n (1), was synthesized through zwitterionic ligand H₃LBr₃ (1,1′,1″-(2,4,6-trimethylbenzene-1,3,5-triyl)-tris(methylene)tris(4-carboxypyridinium)tribromide), secondary ligand H₂BDC (1,4-benzenedicarboxylic acid) and Cd(NO₃)₂·4H₂O by solvothermal method. Compound 1 was characterized by elemental analyses, FT-IR spectroscopy, powder, and single-crystal X-ray diffraction and thermogravimetric analysis. The photophysical properties of 1 were investigated by solid-state diffuse reflectance spectrum. In 1, each L is linked by two separate Cd(II)-centered distorted tetrahedra, which are also linked by two L, thereby forming a head-to-tail connected 2-D layer structure and further building the 3-D framework through BDC^2?-chelating-bridging between layers.     

Synthesis, Crystal Structure and Photoluminescent Property of a 3D Hydrogen-bonded Supramolecular Compound with Large Channels

The title compound, [Pd（2,2′-bipy）2]（Haadip）2·4H2O, was synthesized via the hydrothermal reaction of PdCl2 with 5-aminodiacetic isophthalic acid （H4adip） in an acetic acid water solution. It was characterized by elemental analysis and infrared spectrum. Crystal data for C44H44N6O20Pd： monoclinic, space group P21/n, a = 11.0674（2）, b = 9.9716（2）, c= 20.5770（3）A, β = 92.7300（3）°, V = 2268.29（7）A^3, Z = 2, Mr = 1083.25, Dc = 1.586 g/cm^3, F（000） = 1112,μ = 0.499 mm^-1, 2（MoKa） = 0.71073 A, T = 293（2） K, 2θmax = 51.38°, GOOF = 1.067, R = 0.0268 and wR = 0.0710 for 3770 reflections with 1 〉 2σ（I）. X-ray diffraction studies reveal that the title compound has an interesting 3D microporous architecture via hydrogen bonds with the cations located inside the channel.     

3D semiconducting Co–MOFs based on 5‐(hydroxymethyl)isophthalic acid and imidazole derivatives: syntheses and crystal structures

Two three‐dimensional cobalt‐based metal–organic frameworks with 5‐(hydroxymethyl)isophthalic acid (H₂HIPA), namely poly[[μ₂‐1,4‐bis(2‐methyl‐1H‐imidazol‐1‐yl)benzene‐κ²N³:N^3′][μ₂‐5‐(hydroxymethyl)isophthalato‐κ²O¹:O³]cobalt(II)], [Co(C₉H₆O₅)(C₁₄H₁₄N₄)]_n ( 1 ), and poly[tris[μ₂‐1,4‐bis(1H‐imidazol‐1‐yl)benzene‐κ²N³:N^3′]bis[μ₃‐5‐(hydroxymethyl)isophthalato‐κ²O¹:O³:O⁵]dicobalt(II)], [Co₂(C₉H₆O₅)₂(C₁₂H₁₀N₄)₃]_n ( 2 ), were synthesized under similar hydrothermal conditions. Single‐crystal X‐ray diffraction analyses revealed that 5‐(hydroxymethyl)isophthalate (HIPA^2?) and 1,4‐bis(2‐methyl‐1H‐imidazol‐1‐yl)benzene (1,4‐BMIB) are simple linkers connecting cobalt centres to build a fourfold interpenetration dia framework in complex 1 . However, complex 2 is a pillared‐layer framework with a (3,6)‐connected network constructed by 1,4‐bis(1H‐imidazol‐1‐yl)benzene (1,4‐DIB) linkers, 3‐connected HIPA^2? ligands and 6‐connected Co^II centres. The above significant structural differences can be ascribed to the introduction of the different auxiliary N‐donor ligands. Moreover, UV–Vis spectroscopy and Mott–Schottky measurements confirmed that complexes 1 and 2 are typical n‐type semiconductors.     

5-异烟酰胺基异酞酸构筑的钕化合物的合成、晶体结构和荧光性质

由水热法合成了钕化合物[Nd(HINAIP)(INAIP)(H₂O)₂]_n·nH₂O (1),(H₂INAIP=5-异烟酰胺基异酞酸),并进行了元素分析、IR、TG及X-射线衍射法表征。晶体结构表明：配合物1属于三斜晶系,P1空间群。配合物1是由桥联配体5-异烟酰胺基异酞酸的羧基氧连接成二维层,此二维结构被氢键拓展成三维超分子结构。荧光光谱测试结果表明配合物1具有典型稀土钕的近红外荧光特征。