One-dimensional Chain Dibenzo-18-crown-6 Complex: [K(DB18-C-6)]_2[Pt(SCN)_6]·2H_2O·C_2H_4Cl_2 Assembled by Cation-π Interactions

IntroductionCation- π interactions have come to be appreci-ated as an important noncovalent binding force inmany areas of modern chemistry,such as materialdesign,molecular biology,host- guest and supra-molecular chemistry[1_ 3 ] .These interactions havebeen investigated in the gas phase[4] ,in aqueousmedia by using synthetic receptors[5,6] ,in a numberof protein systems[1,5,7] and in many metal complex-es provided by crystallographic studies[8_ 16] .Cations thatshow cation-π interactions,inc…     

Hydrothermal Synthesis and Crystal Structure of a Novel Polymolybdic（VI） Acid： {[H3O]2^＋[Mo2O4（OH）6^]2-}n

1 INTRODUCTION Coordination polymers[1～3] with one-, two- or three-dimensional structure and supramolecular compounds[4, 5] formed by weak interactions, such as hydrogen bonds, Van Der Waals’ forces, short-range exclusion forces, etc., have a variety of possible applications ranging from semicon- ductor to catalysts and potentially valuable pro- perties reminiscent of zeolites. So, considerable increasing attention has been focused on the syn- thesis or building of these coordination po…     

Syntheses and Crystal Structures of Two Cyano-bridged Bimetallic Complexes [Ce(DMSO)_4(H_2O)_3Fe(CN)_6]·H_2O and [La(DMSO)_4(H_2O)_3Co(CN)_6]·H_2O(DMSO = Dimethylsulfoxide)

1INTRODUCTION Recently,cyano-bridged lanthanide-transition me-tal complexes have been extensively investigateddue to their potential applications as precursors in the preparation of rare earth orthoferrites,fluores-cent and magnetic materials[1].Various complexes of this system have been obtained in order to ex-plore the relations between structures and pro-perties by using different ligands,such as DMF,4,4?-bipy,and so on,to fill the coordination sites of lanthanide ions[2～9].But up to…     

Synthesis and Crystal Structure of a New Zn(II) Nitronyl Nitroxide Complex [Zn(NIT4Py)(PDA)(H_2O)_3]

1 INTRODUCTION Nitronyl nitroxides, independently or in combina- tion with metal ions, have been one of the most wi- dely studied systems in molecular magnetism for understanding radical-radical or metal-radical inte- ractions as well as for synthesizing organic ferroma- gnets and metal-radical magnetic materials[1～4]. Up to now, lots of metal-radical complexes have been reported[5～8]. On the other hand, cooperative inter- molecular interactions, such as coordination bonds, hydrogen bon…     

Hydrothermal Synthesis and Structure Characterization of Diamine-templated Two-dimenisional Cerium Sulfate,[C_6N_2H_(14)][Ce(SO_4)_2(H_2O)_2]·0·5SO_4·2·5H_2O

Open-framework materials are of great interestfrom both the theoretical and practical points of viewdue to their catalytic, absorbent, and ion-exchangeproperties[1]. In the past decade, the study of structur-ally and chemically diverse open framework solids hasbeen flourishing[2—7]. A large variety of silicates[2],phosphates[3]and carboxylates[4]with open-frameworkstructures have been synthesized with organic amines astemplates. Ithas also been demonstrated thatother oxy-salts such as selenat…     

Hydrothermal Synthesis and Crystal Structure of [H_4As_8V_(14)O_(42)(H_2O)]·6H_2O

1 INTRODUCTION The chemistry of polyoxometalates continues to attract interest as a result of their realized and potential applications in diverse fields, such as cata- lysis, analysis, biochemistry, medicine and material science[1～3]. In the past few …     

Syntheses and Structural Researches of Nine-coordinate K_3[Tb~Ⅲ(nta)_2(H_2O)]·5.5H_2O and Eight-coordinate K_3[Yb~Ⅲ(nta)_2]·5H_2O

1 INTRODUCTION Because the rare earth metal complexes have promoting function to the growth of animals and plants[1] and many other biological activities[2～5], such as antiinflammation, antibacterium, anticoagu- lantion and anticaner, the investigation …     

Synthesis and Crystal Structure of a Cyano-bridged Bimetallic Complex[La(betaine)_2(H_2O)_6Fe(CN)_6]·2H_2O

1 INTRODUCTION In the last decade, cyano-bridged Prussian Blueanalogues[1] have been intensively studied from theviewpoint of application as functionalized molecule-based magnets[2], chemical sensor materials[3], fluo-rescent materials[4] and zeolitic-type materials[5, , 6]etc. In 1976, a series of cyano-bridged three-dimen-sional rare earth hexacyanometalates(IIILnM(CN)6?nH2O (M = Fe or Cr, n = 4 or 5) were crystallized andsubjected to single-crystal X-ray analysis[7]. …     

Synthesis and Crystal Structure of Co(DMSO)_2(H_2O)_2(SCN)_2 with One-dimensional Hydrogen-bonded Structure (DMSO = Dimethylsulfoxide)

1 INTRODUCTION The development of supramolecular complexes has recently attracted considerable attention due to the fundamental interest in self-assembly processes of transition-metal complexes, supramolecular che- mistry and crystal engineering[1]. The ultimate goal is to gain control in order to direct their function[2]. Self-assembly through coordination and nonco- valent interactions such as hydrogen bonds, aromatic π···π stacking, steric repulsion and Van der Waals forces leads …     

Synthesis and Crystal Structure of a Two-dimensional Framework Supramolecular Complex [Mn(phen)(DPZDA)(H_2O)]·2H_2O

1INTRODUCTION Crystal engineering has captured the interest of re-searchers these years[1,2].Especially,supramolecular chemistry based on weak interactions(hydrogen bond,π-πstacking,C–H···O interaction,ion-πinter-action and hydrophobic interaction,et al.)is one of the most hottest studying fields[3～5].So far,in this field,intensive endeavors have been paid to the synthesis of novel functional complexes possessing catalysis,non-linear optical property,magnetism and molecular recog…     

Synthesis and Crystal Structure of a Novel Three-dimensional Cu(II) Compound{[Cu(2,2''''-bipy)(C_7H_4O_5S)(H_2O)_2]·H_2O}_n

1 INTRODUCTION Recently, the design and synthesis of novel inorg-anicorganic supramolecular complexes have been at-tached more and more attention due to their poten-tial applications in many areas[1～3]. Copper complex-es have attracted much attention owing to their intri-guing properties, such as molecular magnetization,absorption, heterogeneous catalysis, etc[4, . A series5]of copper-carboxylate complexes have been reportedand all kinds of coordination models of the car-boxylic group a…     

Synthesis and Structural Characterization of a Novel 2D Supramolecular Complex {[Dy_2Zn(dinic)_4(H_2O)_8]·H_2O}n (H_2dinic = 2,5-Pyridinedicaboxylic Acid)

1INTRODUCTION Studies on the syntheses,structures,and proper-ties of lanthanide-transition metal complexes are currently of great interest not only due to their beha-viors as good models to investigate the nature of magnetic exchange interactions between3d and4f metal ions in magnetic materials but also to the fascinating coordination properties of Ln(III)[1～6].Although some infinite lanthanide(III)-transition metal compounds have been obtained by the con-ventional self-assembly reacti…     

Synthesis and Crystal Structure of a Novel 1D Chain-like Organic Inorganic Hybrid Rare Earth Derivative of Polyoxometalate: H_(0.5)[Sm(H_2O)_6]_(0.25)[Sm(H_2O)_5]_(0.25){[Sm(H_2O)_7][Sm(H_2O)_2-(DMSO)][SiW_(11)O_(39)]}·4.5H_2O

Polyoxometalates may be versatile inorganic building blocks for the construction of molecular-based materials. By means of their multiple coordination requirements and oxophilicity, lanthanide cations are suitable to link polyoxometalate building blocks to form new classes of materials with potentially useful magnetic and luminescent properties1-4. Peacock and Weakley studied the interactions between the [α-SiW11 O39]8? isomer and lanthanide cations5, and they reported that the [α-SiW11O39…     

Synthesis and Structure of [Cu（OH）2（H2O）2（4—C5H4N—COOH）2]

1 INTRODUCTION Supramolecular chemistry and crystal engineering of coordination compounds have attracted considerable interests nowadays owing to the fascinating structural diversity and potential applications as functional materials[1,2]. Generally, architectures of supramolecules are formed through hydrogen bonds, ?- ?stacking interaction or other weak interactions between the molecules. Recently, many supramolecular compounds containing silver(I) and copper(II) species have been re-…     

An Unprecedented 1D Zigzag Chain Alkaline Earth Metal Derivative {[Ba(DMF)_3(H_2O)_2][Ba(DMF)_4]_2(P_2W_(18)O_(62))}_n Containing Dawson Heteropolyanion

Most of the polyoxometalates have discrete structures of definite sizes and shapes belonging to well-known structural types, such as the Lindquist, Keggin, Dawson, Strandberg, or Anderson1–2. Linking these discrete entities to build solid-state materials…     

Synthesis and Crystal Structure of {Cu_2(pdc)_2(4,4''''-bipy)(H_2O)·3H_2O}_2

1 INTRODUCTION The increasing interest in inorganic-organic hybrid framework assemblies has resulted in a great number of research efforts focused on the develop- ment of new functional materials possessing various potential applications on catalysis, electrical conduc- tivity and magnetism[1～4]. In recent years, the inter- action of H2pdc with several metal ions has been extensively studied[5, 6] due to its unique ability to form stable chelates in diverse coordination modes such as bid…     

Syntheses, Crystal Structures and Properties of Two New W-Ag 1D Chain Complexes: [W_2Ag_2S_8·Ca(DMF)_6]_n and [WAgS_4·Na(DMF)_3]_n

1 INTRODUCTION Since the first characterization of {[PPh4][MoAgS4]}n by resonance Raman spectroscopy[1], transition metal sulfur complexes have attracted much attention owing to their interesting optical, catalytic and electrical properties for device applications[2, 3]. Through chan- ging some conditions, such as cations or solvents, many one-dimensional W(Mo)/Ag(Cu)/S polymeric complexes could be obtained by the reaction of WS42? and Ag ions, such as linear chain [WAgS4?NH4]n[4…     

Synthesis and Crystal Structure of a Novel Two-dimensional Supramolecular Complex Ni（C6H7N）2（SCN）2（H2O）2

1 INTRODUCTION Supramolecular chemistry is based on the notion of creating novel structural and functional extended systems using noncovalent interactions between prefabricated molecular or ionic building blocks[1]. More recently, the design of supramolecular architec- tures by self-assembly of small building blocks has become a major research area[2, 3] due to their poten- tial applications in many fields such as selective clathration[4, 5], molecular recognition[6, 7], catalysis[8, 9] a…     

Synthesis and Crystal Structure of Complex: [Co(cdm)_2(H_2O)_4].2H_2O (cdm=Carbamyldicyanomethanide Anion)

1 INTRODUCTION Crystal engineering and the design of solid-state architectures have recently become areas of increasing interest[1, 2]. Such crystal engineering may afford new materials with useful properties such as catalytic activity, micro-porosity, nonlinear optical activity, cooperative magnetic behavior and so on. Polynitrile-ligand is one of the ideal multi-functional ligands for crystal engineering and many complexes with polynitriles as ligands have been found to show the spe…     

InCl_3·4H_2O Catalyzed Aldol Condensation of Cycloalkanones with Aromatic Aldehydes

a, a-Bis (substituted) benzylidenecycloalkanones are widely used as precursors for synthesis of bioactive pyrimidine derivatives and their synthesis have attracted considerable attention1. Aldol condensation of cyclopentanone or cyclohexanone with aldehydes is employed, and the reactions were carried out in the presence of strong acids or bases2. Recently, the application of metal ions as catalyst in this type of reaction has been reported3. For example, RuCl3 has been reported to be an exc…