Synthesis and Liquid Crystal Properties of Transition Metal Complexes of Mesotetra （4-n-myristyloxyphenyl） porphyrin

Transition metal complexes of meso-tetra (4-myristyloxyphenyl)porphyrin TMPPM′ [M′=Mn, Fe, Co, Ni, Cu, Zn ; TMPP=mesotetra (4-myristyloxyphenyl)porphyrin] have been synthesized and characterized by means of elemental analyses, UV-Vis spectra, infrared photoacoustic spectra, ^1H NMR spectra, molar conductance and differential scanning calorimetry(DSC). The ligand and the Zn complex show liquid crystalline behavior. According to the DSC thermogram of the Zn complex, it exhibits a lower phase transition temperature -7. 453℃ and a wide mesophase temperature span, 77℃.     

Synthesis of Some Polymer‐Metal Complexes and Elucidation of their Structures

In this study, the nine coordination polymers of Fe(III), Co(II) and Ni(II) salts have been synthesized using polyacrylamide (PAA), polt(ethylene glycol) (PEG) and poly(vinyl alcohol) (PVA) and their structures were characterized by magnetic and conductivity measurements, ultraviolet‐visible (UV‐VIS), FTIR spectroscopy and thermogravimetric analysis (TGA). The structures of Fe(III) complexes in the all coordination polymers were found as tetrahedral. The structures of PAA‐Co(II) coordination polymer was determined as octahedral geometry whereas PEG‐Co(II) and PVA‐Co(II) complexes showed as tetrahedral structure. PAA‐Ni(II) and PEG‐Ni(II) complexes have octahedral geometry, whereas PVA‐Ni(II) has a square planar structure. Besides, the stress‐strain experiments of PVA‐metal coordination polymers obtained rubber‐like structure were carried out and the value of breaking‐strain of PVA‐Ni(II) complex was found to be about 17% of vulcanized natural rubber. The conductivities of the resulting polymer‐metal complexes were measured by four‐probe technique and were found in the range 10^?5?10^?6 Scm^?1. Thus, it was suggested that they can be used in the field potential application of conducting polymers. TGA results revealed that among the complexes PEG‐Fe(III) and PVA‐Fe(III) complexes have the highest thermally stable.     

Synthesis and Luminescent Properties of Cationic Ir（Ⅲ） Complexes of 2-Phenylquinoline Derivatives

Two cationic iridium(III) complexes, [(pqcm)2Ir(pybz)](PF6) (Ir1) and [(pqcm)2Ir(apybz)](PF6) (Ir2) (pqcmH=2-phenyl-quinoline-4-carboxylic acid methyl ester, pybz=2-pyridyl-benzimidazole, apybz=1-allyl-2-pyridyl-benzimidazole), were readily synthesized from the reaction of IrIII-μ-chloro-bridged dimer [Ir(pqcm)2(Cl)]2 and corresponding ancillary ligands, and characterized by NMR and mass spectroscopies. The structure of Ir2 was also confirmed by single-crystal X-ray diffraction. The photophysical properties of the two complexes were also investigated. Ir1 shows deep red emission peaked at around 652 nm with the phosphorescence quantum yield of ca. 0.29 and the emission lifetime of 233 ns, while Ir2 shows red emission peaked at around 615 nm with the phosphorescence quantum yield of ca. 0.13 and the emission lifetime of 430 ns. The active hydrogen on pybz ligand is believed to have a great influence on the photophysical properties of Ir1.     

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

N-2-Thiazolylacrylamide （NTA） was polymerized by a radical route to obtain the polymer in good yield. The polymer with a pendent heterocyclic group is soluble in common organic solvents, which allow to prepare the corresponding metal complexes with higher loads easily. FTIR, ^1H NMR, elemental analysis, and energy-dispersive X-Ray spectroscopy （EDX） were applied to characterize these materials. The magnetic behavior of Fe（Ⅱ） and Nd（Ⅲ） complexes of poly（N-2-thiazolylacrylamide） was examined by a PPMS-9T magnetometer, exhibiting the characteristics of a soft ferromagnet. It is found that the Nd（Ⅲ） complex has an extremely high relative saturation magnetization of 35 emu/g.     

Synthesis, Characterization and Activity against Staphylococcus of Metal（Ⅱ）-Gatifloxacin Complexes

Three novel isostructural complexes M(gatx)₂(H₂O)₂·4H₂O [gatx=gatifloxacin, M=Zn ( 1 ), Ni ( 2 ) and Co ( 3 )] were synthesized at room temperature and structurally characterized by elemental analysis, IR and single crystal X‐ray diffraction, which exhibit a similar mononuclear structure, in which the metal ion is coordinated by two gatifloxacin and two aqua ligands to furnish a distorted octahedral geometry, and show different activities against staphylococcus due to the different metal ions in the structures.     

Magnetic Properties of Phenoxy－Bridged Binuclear Iron－Thiolato Complexes and Structure of （Et_4N）_2［Fe_2（o－OC_6H_4S）_2（o－OC_6H_4SH）_2］

ＭａｇｎｅｔｉｃＰｒｏｐｅｒｔｉｅｓｏｆＰｈｅｎｏｘｙ－ＢｒｉｄｇｅｄＢｉｎｕｃｌｅａｒＩｒｏｎ－ＴｈｉｏｌａｔｏＣｏｍｐｌｅｘｅｓａｎｄＳｔｒｕｃｔｕｒｅｏｆ（Ｅｔ_４Ｎ）_２［Ｆｅ_２（ｏ－ＯＣ_６Ｈ_４Ｓ）_２（ｏ－ＯＣ_６Ｈ_４ＳＨ）_２］ＸＩＥＸｉ?..     

Synthesis and Magnetic Properties of Binuclear Coblat（Ⅱ） Complexes with Alkoxide Bridge

ＳｙｎｔｈｅｓｉｓａｎｄＭａｇｎｅｔｉｃＰｒｏｐｅｒｔｉｅｓｏｆＢｉｎｕｃｌｅａｒＣｏｂｌａｔ（Ⅱ）ＣｏｍｐｌｅｘｅｓｗｉｔｈＡｌｋｏｘｉｄｅＢｒｉｄｇｅＹＡＮＳｈｉ－ｐｉｎｇ,ＰＥＮＧＪｉｕ－ｈｅ,ＬＩＡＯＤａｉ－ｚｈｅｎｇ,ＪＩＡＮＧＺｏｎｇ－ｈ...     

Synthesis and Magnetic Properties of Binuclear Mn（Ⅱ）Complexes with Alkoxide Bridge

ＳｙｎｔｈｅｓｉｓａｎｄＭａｇｎｅｔｉｃＰｒｏｐｅｒｔｉｅｓｏｆＢｉｎｕｃｌｅａｒＭｎ（Ⅱ）ＣｏｍｐｌｅｘｅｓｗｉｔｈＡｌｋｏｘｉｄｅＢｒｉｄｇｅＹａｎＳｈｉ－ｐｉｎｇ；ＦａｎＢｏ；ＬｉａｏＤａｉ－ｚｈｅｎｇ；ＪｉａｎｇＺｏｎｇ－ｈｕｉａｎｄＷａｎｇ...     

Structural Studies of Complexes of 1－phenyl－3－methyl－4－benzoyl－5－pyrazolone with Metal Ions（Ⅲ）（Ⅱ） Crystal Structure of 〔Nd（C_（17）H_（13）N_2O_2）_3（H_2O）_2〕

ＳｔｒｕｃｔｕｒａｌＳｔｕｄｉｅｓｏｆＣｏｍｐｌｅｘｅｓｏｆ１－ｐｈｅｎｙｌ－３－ｍｅｔｈｙｌ－４－ｂｅｎｚｏｙｌ－５－ｐｙｒａｚｏｌｏｎｅｗｉｔｈＭｅｔａｌＩｏｎｓ（Ⅲ）（Ⅱ）ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆ〔Ｎｄ（Ｃ_（１７）Ｈ_（１３）Ｎ_２?..     

Synthesis and Conformational Properties of Some 2′-Unsubstituted Aminoglycoside Antibiotics

Abstract

2′- Deoxygentamicin B, 2′,3′-dideoxygentamicin B, 2′-desaminogentamicin C_1a, and 2′-desaminosisomicin were synthesised by glycosylation of the ψ-disaccharide garamine and found to be potent antibacterial agents. The solution conformations of members of this series and of their diastereoisomers have been studied by ¹³C NMR. Using D- and L-glycosides, shielding effects on deoxystreptamine carbons are shown to provide a reliable method of assigning absolute stereochemistry to related glycosides.     

Synthesis, Thermal, Electrical and Catalytic Studies of Some Transition Metal Polychelates of Bis-bidentate Schiff Base

Polychelates of Mn（Ⅱ）, Fe（Ⅱ）, Co（Ⅱ）, Ni（Ⅱ）, Cu（Ⅱ）, Zn（Ⅱ） and Cd（Ⅱ） with the bis salen-type ligand derived from 4,4＇-bis[（salicylaldehyde-5）azo]biphenyl and 1,4-diaminobutane have been synthesized. All the polychelalls have been characllrized by elemental analysis, magnetic susceptibility measurements, IR, electronic spectra and thennogravirncuic studies. All the complexes isolated in solid stall are dark coloured and insoluble in water and common organic solvents. The ligand behaves as a bis-bidentall molecule coordinating through the phenolic oxygen and azomethine nitrogen atoms. The thermal decomposition of these metal complexes was investigated by thermogravimetric analysis and data have been analyzed for kinetic parameters using Broido equation. The solid-state electrical conductivity of the ligand and its polychelalls in the form of compressed pellet was studied in the temperaturc range from 313 to 413 K All the polychelalls were found to show semiconducting nature. The Mn（Ⅱ）, Fe（Ⅱ）, Co（Ⅱ） and Ni（Ⅱ） polychelalls have been assessed for the catalytic epoxidation of styrene.     

Synthesis and Crystal Structure of μ_4－alkyne Cluster Complex（μ_4－η~2－C_2Ph_2）Co_4（CO）_8（μ－CO）_2

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆμ_４－ａｌｋｙｎｅＣｌｕｓｔｅｒＣｏｍｐｌｅｘ（μ_４－η~２－Ｃ_２Ｐｈ_２）Ｃｏ_４（ＣＯ）_８（μ－ＣＯ）_２ＳｏｎｇＬｉ－Ｃｈｅｎｇ;ＳｈｅｎＪｉｎ－Ｙｕ;ＨｕＱｉｎｇ－Ｍｅｉ;Ｈｕａｎｇ...     

Effect of Some Metal Ion Dopants on Electrochemical Properties of Ni （OH）2 Film Electrode

The Ni(OH)2 film electrodes doped respectively with alkali-earth metals aluminum, lead, partial transi-tion metal and some rare-earth metal (altogether 17 kinds of metals) ions were prepared by cathode electrode-position. The electrode reaction reversibility, the difficult extent of oxygen evolution, the proton diffusion coefficient, the discharge potential of middle value and the active material utilization of the Ni(OH)2 film elec-trode were compared with those of the ones doped with the metal ions by means of cyclic voltammetry, poten-tial step and constant current charge-discharge experiments. It was found that Ca^2 , Co^2 , Cd^2 , Al^3 etc. have obviously nositive effect.     

Synthesis of New Ruthenium（Ⅱ）Bipyridyl Complexes and Studies on Their Photophysical and Photoelectrochemical Properties

Two new mixed-ligand ruthenium(Ⅱ） complexes,Ru(dcbpy)-(LL)NCS)2[where dcbpy=4,4‘-dicarboxyl-2,2‘‘-bipyridine,LL=4,4‘-bis(N-methyl-anilinomethyl)-2,2‘‘-bipyridine(2)],were synthesized,and the tphotophysical properties of these complexes were studied.The metal-to-ligand charge transfer (MLCT) transitions of these complexes exhibited solvatochromic effect due to the existence of NCS ligands.The MLCT energies also strongly depend on the pH values of the solutions because of protonation and deprotonation of the carboxyl groups.The pKa values of the ground state,4.0 for 1 and 3.8 for 2,were obtained from the titration curves.The photoelectrochemical properties of 1 and 2 as sensitizers in sandwich-type solar cells have been studied.Complex 1 exhibited better photoelectrochemical behavior than complex 2 as expected.It was proved that the design of mixed-ligand complex by introducing electron donating group in one of the ligands should be a promising approach.     

Synthesis and Electrical Conductivity of MDA[Ni(dmit)_2]_2

ChargetransfercompIexesbasedonM-(dmit)2anioncomplexeshavebeenwidelyinvestigatedinrecentyearsI'1.Uptonow,arichvarietyofcombinations0fIcatains].-[M(dmit)=1(M=Ni,PdandPt;O相似文献   

Synthesis, Characterization and Properties of Organotin Complexes Dibutyltin（Ⅳ） Bis（heteroaromatic carboxylate） and Crystal Structure of Dibutyltin（Ⅳ） Bis（2-thiazolylcarboxylate）

The six organotin complexes dibutyltin(IV) bis(heteroaromatic carboxylate) were synthesized by the reaction of (n‐Bu)2SnO with heteroaromatic carboxylic acid in 1:2 molar ratio. These complexes have been characterized by elemental analysis, IR, ¹H, ¹³C and ¹¹⁹Sn NMR. The crystal structure of dibutyltin(IV) bis(2‐thiazolylcarboxylate) was determined by X‐ray single crystal diffraction. This compound is a weakly bridged dimer through weak interaction Sn···O between molecules. The tin atoms took six‐coordinate skew‐trapezoidal bipyramidal geometry. The crystal of complex 3 belongs to monoclinic symmetry with space group P2₁/c, a=1.863(2) nm, b=2.220(3) nm, c=1.0395(10) nm, β=90.275(16)°, Z=8, V=4.292(8) nm³, D_c=1.514 Mg/m³, μ=1.406 mm^‐1, F(000)=1968, S=0.999, R=0.0549, wR=0.1011.     

Syntheses and Properties of Lanthanide Hydroxy-meso-tetra（p-chlorophenyl） porphyrin Complexes

The syntheses and characterization of porphyrins and metalloporphyrins have been studied extensively. Hemoglobin, myoglobin or cytochrome P450, has been applied as a model compound. Wong C. P. et al. synthesized the first lanthanide porphyrin, acetylacetonate tetraphenylporphyrin europium, in 1974. Since then the study of porphyrin complexes, as a new field, has devel-     

Facile Synthesis and Catalytic Properties of β-Co（OH）2 and Mg（OH）2 Nanoplates

β-Co(OH)2 and Mg(OH)2 nanoplates were synthesized via a facile template-free hydrothermal approach.The different conditions of preparation and catalytic properties of the products were studied and discussed.The products were characterized by X-ray diffraction,transmission electron microscopy,scanning electron microscopy,selected area electron diffraction(SAED),and gas chromatograph.     

Synthesis,Crystal Structures and Properties of Two Novel Co（Ⅱ） and Cd（Ⅱ） Complexes of N-AcetyI-L-glutamic Acid and Imidazole Ligands

Two novel complexes {[Co（A-glu）（Im）2]·0.5H2O}n （1） and [Cd（A-glu）（Im）3]n （2） （H2A-glu=N-acetyl-L-glutamic acid, Im=imidazole） have been synthesized from the reaction of H2A-glu with Co（CH3COO）2·4H2O or Cd（CH3COO）2·2H2O in the presence of Im. Both of the complexes display different coordination environment and similar one-dimensional chain structure. The magnetic susceptibility measurements for 1 show a weak antiferromagnetic interaction between two cobalt（Ⅱ） ions bridged by A-glu ligand. The complex 2 exhibits an intense fluorescent emission in solid state at room temperature.     

Synthesis of Eu（Ⅲ） and Tb（Ⅲ） Complexes with Two New Amide Type Podands and Their Luminescence Properties

Two new amide type podands L1 and L2 (L1=1,1,1-tris{[2-benzylaminoformyl)phenoxyl] methyl} propane,L2=1,3,5-timethyl-2,4,6-tris{[2-benzylaminoformyl)phenoxyl]methyl} benzene)and their europium and terbium nitrates complexes were synthesized.The luminescence properties of these complexes were also studied.