Synthesis, Crystal Structure and Optical Properties of a New Nd(III) Nitronyl Nitroxide Complex [Nd(NIT2Py)_2(NO_3)_3]

1 INTRODUCTION Nitronyl nitroxides, independently or in combina- tion with metal ions, have been one of the most widely studied systems in molecular magnetism for understanding the radical-radical or metal-radical interactions as well as for synthesizing organic ferro- magnets and metal-radical magnetic materials[1～3]. Meanwhile, investigations on molecular coordina- tion compounds of lanthanide ions have also attrac- ted great attention due to their luminescence[4, 5] or magnetic propert…     

Crystal Structure and Characterization of 2-N-(2-Hydroxy-benzylidene) Furanmethanoamine Nickel(II) Complex

1 INTRODUCTION Recently, the low-spin square-planar nickel(II) complexes and high-spin octahedral nickel(II) complexes with Schiff base ligands have received much attention in optical materials[1～3]. Some nic- kel(II) complexes are widely used as lubricating oil, rubber industry additives, a fire-resistant additive and fungicide for leather[4～7]. Also, their adducts with nitrogen have attracted broad attention due to their potential applications as organic conductors and magnetic mate…     

Synthesis and Crystal Structure of a New Dinuclear Copper(II) Polymer: [Cu_2(bipy)_2(Hbtc)_2(H_2O)_2]·(H_2O)_(1/2)

1INTRODUCTION There is currently considerable interest in the ra-tional design and controlled synthesis of metal-organic frameworks(MOFs)with unique structural motif on account of their promising applications as catalysts,gas storage,selective separation,sensor,ion exchange and magnetic materials[1,2].Particu-larly,the supramolecular architectures with helical structures have received much more attention over the past decades owing to their specific functions in biology.It is well recogn…     

Syntheses and Crystal Structures of Four New Complexes [Mn(4,4′-bip)_2(OH_2)_4](DBA)·4H_2O and [M(OH_2)(HDPA)_2]·3H_2O (M = Mn,Co,Ni)

1 INTRODUCTION During the past years, dicarboxylic acids have been widely used as one polydentate ligand invo- lved in various metal chelation reactions to form transition or rare earth metal complexes with inter- esting properties in material science[1] and biological systems[2]. For example, Kim Y and his coworkers focused on the synthesis of copper(II) complexes containing malonate and pyrazine ligands to study their magnetic property and electronic conducti- vity[3]. The importance o…     

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 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…     

Synthesis and Crystal Structure of a Novel Zinc Complex [Zn(OH_2)(HDPA)_2]·3H_2O

1INTRODUCTION In recent years,dicarboxylic acids have been wide-ly used as poly-dentate ligands involved in various metal chelation reactions to form transition or rare earth metal complexes with interesting properties in material science[1~3]and biological systems[4~7].For example,Kim,Y.and his coworkers focus on the syn-theses of copper(II)complexes containing ligands of malonate and pyrazine to study their electronic con-ductivity and magnetic property[8].The importance of Tr(II)/dic…     

Hydrothermal Synthesis and Crystal Structure of Iron Molybdophosphate Fe[Mo_6O_(12)(OH)_3(H_2PO_4)(HPO_4)_2(PO_4)]_2- [Fe(2,2′-bipy)(H_2O)_2]_2[Fe(2,2′-bipy)_3]_2·6H_2O

1 INTRODUCTION Organic-inorganic hybrid materials and polyoxo-metalates have received much attention because of their intriguing structural diversity and potential applications in molecular adsorption, ion exchange, heterogeneous catalysis and nanotech nology as well as in electrical, magnetic and photochemical areas[1, 2]. One of the important ad- vances in the design of new organic-inorganic hybrid materials is utilizing poly- oxometalates’ coordination ability to produce poly- oxoanio…     

Synthesis and Crystal Structure of an Imino Nitroxide Complex [Cd（IM2py）2Cl2]

1 INTRODUCTION Nitroxide radicals including nitronyl nitroxide (NITR) and imino nitroxide (IMR) have been widely used as units in the synthesis of molecule-based magnetic materials, especially as ligands in their complexes with paramagnetic metals[1～11]…     

Synthesis and Magnetic Properties of Fe(II) and Nd(III) Complexes of Poly(N-2-thiazolylacrylamide)

In recent years,the organic ferromagnets have drawn growing attention due to their characteristics of structural diversities,low density,and readily processing1-3.Design and synthesis of magnetic polymers are one of great challenges in today′s magnetic material research,and some significant achievements have been made in this field4,5.In this article,we describe the synthesis of acrylamide-type polymer with pendent thiazolyl groups(Scheme1).The as-prepared polymer exhibited better solubility …     

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…     

CRYSTALLOGRAPHIC STRUCTURE AND MAGNETIC PROPERTIES OF R_(2)Fe_(17)N_(2.4)

By a proper thermal treatment, the nitrogen atoms can enter the R2Fe17 structure. The crystallographic and intrinsic magnetic properties as well as their relationship have been studied by magnetic measurements, X-ray and neutron diffraction techniques. The neutron data indicate that the nitrogen atoms occupy the interstitial sites in the Th2Zn17-type rhom-bohedral structure. The inserting nitrogen atoms are found to dilate the cell volume, increase the Curie temperature and enhance the saturation moment by raising the difference in the electron number between the spin-up and spin-down 3d subbands of the Fe atoms. Furthermore, the nitrogen atoms have an important effect on the magnetocrystallic anisotropy, which results in an easy axis with Sm2Fe17N2.4. All these make Sm2Fe17N2.4 favorable for permanent magnet applications.     

Synthesis, Crystal Structure and Magnetic Properties of Cobalt(II) Complex Involving Imino Nitroxide Radicals

1 INTRODUCTION The synthesis and study of transition metal com-plexes incorporating organic free radicals have arou-sed great interest in the field of molecular magne-tism[1]. Nitronyl nitroxide radicals (NITR), stable or-ganic radicals, have been widely used as molecularunits in the design and construction of magnetic ma-terials[2～5]. These radicals are especially attractivedue to that their donor atoms can assemble an exten-ded coordination geometry with changing magneticcoupling. A…     

Hydrothermal Synthesis, Crystal Structure and Photoluminescent Property of a Zinc(II) Coordination Polymer Assembled by Phthalate and 4,4′-Bipyridine

1 INTRODUCTION Inorganic coordination polymers or solid-state po- lymers have received considerable attention in the past few years due to their possible applications as new materials in catalysis, adsorption, ion exchange, separation, magnetic devices, etc.[1] Metal coordina- tion polymers containing dicarboxylate ions as the organic spacer have been the subject of particular interest due to their fascinating architectures and ad- vantageous properties, such as bulk magnetic beha- vior, h…     

A New One-dimensional Zigzag Chain [Zn(1,5-NDC)(2,2′-bipy)]_n Obtained from Hydrothermal Reaction

1 INTRODUCTION The coordination polymers have attracted much attention in recent years owning to their fascinating molecular structures and potential applications as catalysts, luminescent materials and magnetic materials[1～6]. Consequently, numerous new com- pounds have been produced mostly by using appro- priate organic ligands, especially bridging ligands containing multi-dentate oxygen, nitrogen, or sulfur donors to coordinate with the transition metal centers[7～10]. Among them, 1,4…     

Synthesis,Crystal Structure,and Spectral Properties of a Novel Co(II) Complex Containing Imidazole Derivative

1 INTRODUCTION The metal-organic frameworks constructed from metals and π-conjugated ligands might have poten- tial applications in various fields, such as electronic, optical or magnetic materials[1～3]. Therefore, this kind of complex has attracted the increasing atten- tion of chemists, and considerable efforts have been devoted to the rational design and synthesis of new materials[4, 5]. Moreover, the organic-inorganic hybri- dized coordination complexes with imidazole deri- vatives …     

Synthesis and Structure of a Novel Compound [Cu_2(EDTA)(Py)_2(H_2O)_2]·2H_2O

1 INTRODUCTION Multinuclear coordination compounds have attrac-ted much attention due to their distinctive optical, elec-tric and magnetic properties as well as enzyme ana-logue[1～4]. It is important for carboxylic acid to de-sign this compound[5～8]. EDTA is a useful titrant formetal determination because EDTA molecule is easyto coordinate with a metal atom (1:1). Other types ofEDTA-M compounds are seldom to know except Ln2-M3(EDTA)3(H2O)11?12H2O[5] and (UO2 )2EDTA[9]. …     

A Mixed-valent Hexanuclear Cu^Ⅱ-Cu^Ⅰ Complex with Unusual Tridentate pbi Ligand （pbi = 2-（2-Pyridyl）-benzimidazole）

1INTRODUCTION Imidazole(Him)or pyrazole(Hpz)and its deriva-tives in their deprotonated forms have been exten-sively employed in building a large variety of po-lynuclear complexes and polymeric systems[1].A number of metal imidazolates have been studied owing to their fascinating properties and great poten-tial applications,such as high thermal stability[2],magnetic hysteresis[3],luminescence[4]as well as anticorrosive[5]and microbial activities[6].As an im-portant branch,copper imidazolat…     

Syntheses and Crystal Structures of Zinc(II) and Nickel(II) Complexes Involving Reduced Nitroxide Radicals

1 INTRODUCTION The synthesis of new molecular magnetic mate- rials that combine transition metal ions and pure organic radicals as ligating sites has attracted much more attention in the last few years[1~4]. Nitronyl ni- troxide radicals, independently or in combination with metal ions, have been one of the most studied systems in molecular magnetism for understanding the radical-radical or metal-radical interactions as well as for synthesizing organic ferromagnets and metal-radical magne…     

Synthesis, Crystal Structure and Electrochemical Properties of the Complex Cd（α-FRA）2（Phen）（H2O）

1 INTRODUCTION The syntheses and structures of carboxyl complex- es have captured the interest of chemists for years due to their potential applications in many fields, such as materials, medicine, molecular electro-che- mistry and biochemistry[1～3]. So far, to the best of our knowledge, cadmium complexes with aromatic carboxylic acid as ligands have been intensively studied[4～7], but those with heterocyclic carboxylic acid as ligands are much less. α-Furoic acid is widely used in orga…