Study on the effect of weak interactions and symmetry in crystal architecture

摘要芳香族多羧酸能与金属离子形成种类繁多、结构新奇、性能优异的配位聚合物。经过修饰的芳香族羧酸则对配位反应及配合物的拓扑结构起着重要影响，同时金属离子本身也对配位方式起着决定性的作用。本研究选择第一过渡系金属离子铜(Ⅱ)、锌(Ⅱ)、锰(Ⅱ)，结合晶体工程的思想，通过扩散法、溶液法及溶剂热法，合成了7个配位聚合物，并对它们的结构和性质进行了表征。探讨了氢键、π-π作用、疏水作用等分子间作用及构筑体对称性等因素在晶体构筑中发挥的重要作用。这些配合物分别是：(1)配合物1(C18H30Cu3N6O15)n(2)配合物2(C12H18CuN2O4)n(3)配合物3(C20H36O8S4Zn)n(4)配...Abstract Aromatic polycarboxylic acids can form coordination polymers with novel structures and properties. The substituents on modified aromatic carboxylic acids, as well as the metal ions, are the essential factors for controlling the topology of coordination polymers. In this research, based on the idea of crystal engineering, 7 coordination polymers have been designed and synthesized through t...学位：理学硕士院系专业：化学化工学院化学系_无机化学学号：X20032500

Matrix Pair with the Sum and Product Being Equal and Its Polynomial Denotation

用矩阵JOrdAn标准形理论,证明了和与积相等的矩阵对的JOrdAn标准形具有互为确定的性质,进而得到由和与积相等的矩阵对的最小多项式及交换子空间确定的多项式表示的新结果.Applying the theory of Jordan canonical form,we proved the properties of Jordan canonical forms of the matrix pair with the sum and product being equal are determined mutually,obtaining the new results of polynomial denotation determined by minimal polynomial and commutative subspaces.福建省自然科学基金(批准号:2010J01018); 福建省教育厅科研项目基金(批准号:JA12286;JA08196); 福建省高校服务海西建设重点项目(批准号:2008HX03

Investigation of Structures of the Self-assembled Pseudorotaxane of Cucurbiturils with Some Alkyldiamines

以1H核磁共振技术和X射线单晶衍射分析方法考察了 3种瓜环与长链二胺 ( 1,7 庚二胺与 1,8 辛二胺 )相互作用的结构特征 .1HNMR分析表明瓜环 (Q[6]和Q[7] )与有机二胺 ( 1,7 庚二胺与 1,8 辛二胺 )有较强的相互作用 ,形成自组装类轮烷结构 ;Q[8]与 1,7 庚二胺与 1,8 辛二胺之间相互作用力相对较弱 ;晶体结构测定结果表明 ,六元瓜环与辛二胺自组装形成的类轮烷实体中 ,辛二胺是以直链状穿过六元瓜环的空腔 ,两配位氨基留在瓜环两端口之外 .The structures of self-assembled pseudorotaxane of cucurbit[n]urils(n=6～8) with some alkyldiamines have been investigated by 1H NMR technique and single crystal X-ray diffraction method. The results reveal that the interaction between cucurbit[6]uril or cucurbit[7]uril and 1,7-diaminoheptane or 1,8-diaminooctane is stronger than that between cucurbit[8]uril and 1,7-diaminoheptane or 1,8-diaminooctane, and the pseudorotaxanes of cucurbit[n]urils with the alkyldiamines were observed. Particularly, in the pseudorotaxane of cucurbit[6]uril with 1,8-diaminooctane, the amino groups of 1,8-diaminooctane are left outside the ports of cucurbit[6]uril.国家自然科学基金(No.200261002);; 贵州省重点基金(No.20023004);; 贵州省国际合作(No.200211003)资助项目

5-tert-butylbenzene-1,3-dicarboxylic acid

通讯作者地址: Ng,SW(通讯作者),Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 2. Univ Malaya, Dept Chem, Kuala Lumpur 50603, Malaysia 电子邮件地址: [email protected] the crystal structure of the title compound, C12H14O4, the carboxy groups are linked across centers of inversion by O-H center dot center dot center dot O hydrogen bonds; the resulting hydrogen-bonded chain adopts a zigzag motif

“建筑适应性”主题沙龙

"地域建筑"是当下建筑学界共同尊重的准则,但这一术语的过度使用,也使得其内涵在当代建筑创作中逐渐模糊。本期沙龙主题"建筑适应性",是对"地域建造"这一命题的具体化。"适度"的"适应"是当下应当倡导的地域建筑设计创作原则。"建筑适应性"中的"适应",强调对历史文脉与所处环境的积极回应,研究建筑与环境之间的复杂应答关联;除此,"建筑适应性"还强调对经济、技术、材料的"适度

Investigation of structures of the self-assembled pseudorotaxane of cucurbiturils with some alkyldiamines

The structures of self-assembled pseudorotaxane of cucurbit [n] urils ( n = 6 similar to 8) with some alkyldiamines have been investigated by H-1 NMR technique and single crystal X-ray diffraction method. The results reveal that the interaction between cucurbit[6]uril or cucurbit[7]uril and 1,7-diaminoheptane or 1,8-diaminooctane is stronger than that between cucurbit[ 8] uril and 1,7-diaminoheptane or 1, 8-diaminooctane, and the pseudorotaxanes of cucurbit[n] urils with the alkyldiamines were observed. Particularly, in the pseudorotaxane of cucurbit [6] uril with 1, 8-diaminooctane, the amino groups of 1, 8-diaminooctane are left outside the ports of cucurbit [6] uril

Synthesis and Crystal Structure of Cu(Ⅱ) Complex Constructed from 1,3,5-Benzenetricarboxylic Acid

利用硝酸铜[Cu(nO3)2·6H2O]和均苯三甲酸在氨水溶液中反应,通过氨对铜(Ⅱ)离子的配合来调控配位反应速率,合成配合物{[Cu3(bTC)2(nH3)6(H2O)]·2H2O}n,并经元素分析和X射线单晶衍射法证实。配合物属单斜晶系,空间群为C2/C,晶体学参数:A=13.9213(5),b=17.1210(6),C=12.5271(5),V=2710.9(2)3,z=4。在标题化合物的结构中,Cu1离子为四配位而Cu2离子是五配位的,Cu1和Cu2被均苯三甲酸根离子桥联,由于均苯三甲酸根离子的结构中有C3对称轴而形成了二维六员环状平面结构,平面间通过n-H…O,O-H…O等氢键和π-π作用形成层状堆积。The complex {[Cu3(btc) 2(NH3) 6(H2O) ]·2H2O}n(btc =1,3,5-benzene-tricarboxylate) was synthesized by reaction of 1,3,5-benzenetricarboxylic acid with Cu(NO3) 2·6H2O in aqueous ammonia.The reaction velocity of the assembly was controlled by the diffusion of the ammonia.The crystal structure was confirmed by elemental analysis and X-ray single crystal diffraction.The title complex belongs to monoclinic system with space group C2/c,cell parameters:a = 13.9213(5) ,b = 17.1210(6) ,c = 12.5271(5) ,β = 114.779(1)°,V = 2710.9(2) 3,Z = 4,R1 = 0.0226 and wR2= 0.0619.X-ray single crystal diffraction study reveals that there are two crystallographic independent Cu2+ ions in the complex.Cu1 is square planar coordinated while Cu2 is square pyramidal coordinated.Cu2+ ions are connected by fully deprotonated btc to form 2D undulating sheet of honeycomb motif.The geometries of btc and ammonia match perfectly because both of them possess C3 symmetry.covalent bonds,coordination bonds,hydrogen bonds and π-π interactions collaborate perfectly in the crystal structure of the title complex.国家自然科学基金资助项目(No.20471049

Synthesis and Crystal Structure of a Binuclear Zn(Ⅱ) Complex

利用硝酸锌和邻-氨基对苯二甲酸在dMSO溶液中反应,合成配合物{[zn(nH2-bdC)(H2O)].3(dMSO).H2O}n(nH2-bdC=邻-氨基对苯二甲酸),并对其进行元素分析和X单晶射线的表征.配合物属正交晶系,空间群为IbAM,晶体学参数:A=10.9472(4),b=18.7371(7),C=21.7559(9),V=4462.5(3)3,z=8.该配合物中,锌离子为5配位,2个zn原子和4个羧基形成的双核锌结构单元(Sbu),进而形成二维方格式平面结构,氨基取代基导致配合物具有亲水性.A new binuclear complex {[Zn(NH2-bdc)(H2O)]·3(DMSO)·H2O}n(NH2-bdc= 2-Aminobenzenedicarboxylate) was synthesized with Zn(NO3)2·6H2O and 2-Aminotetrephthalic acid in a DMSO solution.The Crystal structure was confirmed by elemental analysis and single crystal X-ray diffraction.The title complex belongs to Orthorhombic system with space group Ibam,cell parameters: a =10.9472(4) ,b=18.7371(7),c=21.7559(9),V=4462.5(3)3,Z=8.X-ray single crystal diffraction study reveals that the Zn(Ⅱ) atom is five-coordinated,Furthermore,a 2D superamolecular network is constructed via the tetracarboxylate bridged binuclear of Zinc SBU(secondary building unit),and the amino substituent results in the formation of hydrophilic 2D structure of the title complex.国家自然科学基金资助项目(20471049

Synthesis and Crystal Structure of Zn(Ⅱ) Complex Constructed from 2,3,5,6-Tetramethlytetrephalic Acid

采用扩散法,通过硝酸锌和四甲基对苯二甲酸反应,合成配合物{[zn(C12H12O4)(dMSO)2].2(dMSO)}n,并经元素分析和X射线单晶衍射法证实。配合物属单斜晶系,空间群为C2/C,晶体学参数:A=1.219 80(9)nM,b=1.294 63(10)nM,C=1.784 71(13)nM,V=2.749 4(4)nM3,z=4。甲基取代基导致标题化合物为一维疏水链状结构。The complex {[Zn(tmbdc)(DMSO)2]·2(DMSO) }n(tmbdc = 2,3,5,6-tetramethylbenzenedicarboxylate) is synthesized with 2,3,5,6-tetramethlytetrephalic acid and Zn(NO3)2·6H2O by means of diffusion.The crystal structure is confirmed by elemental analysis and X-ray single crystal diffraction.The title complex belongs to monoclinic system with space group C2/c,cell parameters: a=1.219 80(9) nm,b=1.294 63(10) nm,c= 1.784 71(13)nm,V= 2.749 4(4) nm3,Z= 4.The methyl substituents result in the formation of the hydrophobic 1D chain structure of the title complex.国家自然科学基金资助项目(20471049

U型拱梁失稳有限元分析

U型拱梁在隧道支护和矿山巷道支护中应用广泛,实际工程中的地压作用以及注浆加固过程中产生的集中力都可能引起支架的失稳破坏。本文利用有限元数值分析软件ANSYS采用我们提出的瞬态分析计算失稳临界载荷方法对不同对称位置受径向集中力作用的U型钢拱梁的稳定性进行了研究,并分别采用特征值屈曲分析和几何非线性分析方法进行了分析,将得到的失稳临界荷载值进行了对比分析。研究结果为工程应用提供了可行方法和理论依据