1，4二环己基取代六元瓜环与Na(Ⅰ)自组装实体的合成与晶体结构

A novel complex of a new 1,4-dicyclohexyl cucurbituril(DCYQ[6]) with sodium(Ⅰ) ion was synthesized, and the crystal structure was determined by X-ray diffraction technique. In this self-assembled entity both the cavity interaction of DCYQ[6] included a nitrate anion and the portal interaction of the dipole carbonyls of DCYQ[6] with sodium cations lead to form self assembled molecular capsules. The crystal structure of the entity shows a packing of the self assembled molecular capsules connected by hydrogen bonds of water molecules. CCDC: 271400.     

配合物[Co(2，3-tri)2Cl]·ZnCl4·Cl·H2O和[Co(amp)3]·amph·Cl·2ZnCl4·H2O合成及晶体结构

采用三元胺及二元胺混配方法进行[Co(N)₅Cl]²⁺配合物的合成，分离出分别由三元胺配体和二胺配体构成的2个钴胺配合物。晶体结构测定表明由三元胺配体构成的钴胺配合物中，三元胺为N-(2-Aminoethyl)-1，3-propanediamine(记为2，3-tri)，但并未以六胺形式配位[Co(N)₆]³⁺，而以六胺五配位形式形成[Co(N)₆Cl]²⁺，这     

Semi-Quantum Bi-Signature Scheme Based on W States

International Journal of Theoretical Physics - A semi-quantum bi-signature scheme based on W states is designed, in which two signers sign the same message. The unconditional security of the new...     

五元瓜环与钕离子在四氯酸锌离子诱导下构筑的配合超分子自组装

在四氯酸锌离子诱导下,五元瓜环能与钕离子构筑形成二维配合超分子自组装。在HCl介质中,Zn²⁺容易形成四氯酸锌离子,在其诱导作用下,钕离子和五元瓜环端口羰基氧直接配位形成二维超分子自组装体。结果表明锌离子作为一种结构导向剂在形成瓜环基超分子自组装体中起到重要作用。     

在四氯合锌离子诱导下反式六元瓜环与碱金属离子构筑的配位超分子自组装体

在盐酸介质中,通过四氯合锌离子诱导,碱金属离子能与反式六元瓜环端口羰基氧原子直接配位构筑形成超分子自组装体。单晶结构表明在HCl介质中,四氯合锌离子形成"蜂巢结构",而且在[ZnCl₄]^2-诱导作用下,碱金属离子和反式六元瓜环端口羰基氧直接配位形成一维超分子自组装体而填充在"蜂巢结构"中。     

三种六元瓜环与Sr(Ⅱ)离子的配位及超分子自组装

本文以六元瓜环及两种部分甲基取代六元瓜环(统称为Q[6]s)为构筑元件,合成了4个Q[6]s-Sr髤离子的配合物,用X射线单晶衍射方法测定了配合物的晶体结构。结果表明,Q[6]s-Sr髤离子配合物自组装形成不同结构的分子链,体系中存在Cl-离子时,Q[6]s-Sr髤离子形成配位聚合链,而只有NO3-离子存在时,形成水分子配位桥连的超分子链。     

1,10-邻菲咯啉取代苷脲及其一维Ag(Ⅰ)配位聚合物的合成及晶体结构

合成了1,10-邻菲咯啉取代苷脲(L),并用L与硝酸银反应得到一维配位聚合物[AgLNO3]n,利用X-射线衍射方法测定了它们的晶体结构。L:单斜晶系,空间群P21/c,a=1.8545nm,b=1.2504nm,c=1.2818nm,β=108.476°,V=2.8192nm3,Z=7,F(000)=1176,finalGOF=1.093,R1=0.060,wR2=0.1654,。[AgLNO3]n:正交晶系,空间群Pca21,a=1.55149nm,b=1.04907nm,c=1.15892nm,V=1.8863nm3,Z=4,F(000)=1024,finalGOF=1.038,R1=0.042,wR2=0.110。晶体结构表明配体L与Ag髣形成了一维配位聚合物[AgLNO3]n。     

Three-Party Semi-Quantum Key Agreement Protocol

International Journal of Theoretical Physics - A semi-quantum key agreement protocol is proposed to allow one quantum participant and two classical ones to negotiate the final shared secret key...     

Supramolecular assemblies based on some new methyl-substituted cucurbit[5]urils through hydrogen bonding

Three supramolecular assemblies based on three new partial methyl-substituted cucurbit[5]urils, which are tetramethylcucurbit[5]uril (α,γ-TMeQ[5]), hexamethyl cucurbit[5]uril (α,β,δ-HMeQ[5]), Nonamethylcucurbit[5]uril (NMeQ[5]), were synthesized and structurally characterized by single-crystal X-ray diffractions. For the comparison with these new Q[5]s, crystal structure of an assembly constructing with normal Q[5] and K₂PtCl₆ was also reported. They are (α,γ-TMeQ[5])·15(H₂O) (1), (α,β,δ-HMeQ[5])·2Cl⁻·2(H₃O)⁺·7(H₂O) (2), (NMeQ[5])·14(H₂O) (3), (4). In the corresponding crystal structures, the molecular encapsulates included a water molecule and lidded water molecules at both of the portals were observed. Moreover, these molecular encapsulates are connected through hydrogen bonding and formed supramolecular chains or joined in pair.     

Four zinc(II) helical coordination polymers and 78-membered six-node zinc metallacycle assembled from diastereopure N,N'-bis(acetylacetone)cyclohexanediimine

The interaction of the diastereopure N,N'-bis(acetylacetone)cyclohexanediimine ligands, L(1)(1R,2R), L(2)(1S,2S), and their 1:1 mixture, with Zn(II) chloride has been investigated. Four new coordination polymers, [ZnL(1)Cl2 x H2O]n (1), [ZnL(2)Cl2 x H2O]n (2), [ZnL(2)Cl2]n (3), and [Zn6(L(2))6Cl12 x 2 H2O]n (4), each consisting of an infinite single helical chain displaying different pitches and/or handedness have been isolated. The complexed Schiff base ligands are present in their deprotonated enol forms, and the nitrogen atoms, which do not coordinate, are protonated because of proton transfer from the adjacent enol oxygen (coupled with concomitant N-H...O bond formation); each bound ligand is thus pseudo-zwitterionic. The respective zinc centers are bound to two chloro ligands and two oxygen donors from acacH-imine units belonging to different N,N'-bis(acetylacetone)cyclohexanediimine ligands such that the coordination at each zinc is distorted tetrahedral. Compounds 1 and 2, prepared from enantiopure L(1) and L(2), respectively, are enantiomers with similar structures, with the helical pitch in each being 17.0 A. Overall, the structure of 3 may be described as a one-dimensional helical chain with a pitch of 17.3 A, with each period corresponding to two L(2) ligands and two metal centers. The structure of [(Zn6L(2)6Cl12) x 2 H2O]n (4) contains six Zn(II) centers connected via six L(2) ligands to form a "bowed" helical repeat unit, with the pitch of the helix corresponding to 43.5 A. Supramolecular (intra- and intermolecular) aspects of all these unusual polymeric structures are discussed. Finally, the synthesis and characterization of an unprecedented six zinc-node discrete supramolecular assembly, [Zn6(L(1))3(L(2))3Cl12] (5), incorporating a 78-membered metallacycle, is also reported.