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Co,Mn,Ni的联苯酸配合物的合成及光谱研究 总被引:2,自引:0,他引:2
合成了联苯酸 ,并以其和吡啶为配体 ,制备了第一过渡系金属离子Co(Ⅱ ) ,Mn(Ⅱ ) ,Ni(Ⅱ )的 3种配合物 ,并通过元素分析、IR及UV等手段对配合物进行了表征 ,推测了可能的组成和结构。 相似文献
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由氟哌酸与Ni(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)的硝酸盐合成了三个未见报道的固态配合物,并用元素分析、摩尔电导、红外光谱、热重分析表征了它们的组成和性质. 相似文献
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合成了4种新的糖胺 金属配合物,分别为[Ni(HL) (H2 O) 2 ]2 Cl2 ·CH3OH·2H2 O ,[Cu(HL) ]2 Cl2 ·CH3CH2 OH·3H2 O ,[Zn(HL) ]2 Cl2 ·H2 O ,[Co(HL) (H2 O) (OH) ]2 Cl2 ·CH3OH·2H2 O (HLN ,N′ 二βD 葡萄糖基乙二胺) ,并用元素分析、红外、紫外、核磁共振氢谱对其结构进行了表征。结果表明,Ni(Ⅱ) ,Co(Ⅲ)配合物为八面体构型,而Cu(Ⅱ) ,Zn(Ⅱ)配合物为四面体构型。最后研究了其对对硝基苯吡啶甲酸酯(PNPP)催化水解的催化速率常数。 相似文献
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有机电致发光器件(OLED)已成为平板显示、照明等领域的研究热点。针对已报道的蓝光材料相对短缺,合成了一种新型希夫碱硼配合物蓝光发射材料,其可由N,N′-二(2-羟基-3-甲氧基苯甲醛)缩乙二胺[(HMOB)2en]与醋酸硼B(Ac)3在苯溶剂中反应制得。通过1H NMR,13C NMR和红外光谱确定了其结构,并对其紫外-可见吸收光谱和荧光光谱进行了研究。1H NMR、13C NMR和红外光谱表明该配合物是一种以[B(MOB)2en]Ac分子形式存在的配合物。[B(MOB)2en]Ac的发光与B的引入有关,B的引入增强了分子的刚性、减少了非辐射跃迁能量损失,最终得到一种较强的蓝绿光发光材料。该材料发射的峰值波长为485nm,半峰全宽为87nm,CIE坐标:x=0.2211,y=0.4172,其最佳激发峰波长为378nm。 相似文献
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研究了在pH5.3的醋酸-醋酸钠缓冲体系中,四甘醇醛缩苯丙氨酸Schiff碱与铜的双核配合物([Cu2L(NO3)]NO3)与DNA作用的情况.结果表明[Cu2L(NO3)]NO3在此体系下具有较强的荧光,DNA加入后对其荧光有一定的敏化作用.探讨了造成此种现象的可能原因,并推导了该二元体系的结合常数. 相似文献
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合成了O-(硫杂蒽酮-[2]-基)-氧乙酸,并用元素分析、IR、1H NMR和13C NMR等方法对其结构进行了表征。用光谱学方法研究了该化合物与ct-DNA的相互作用。结果表明,在pH 7.38的模拟体液条件下,该化合物的紫外-可见吸收光谱随ct-DNA浓度的增加,表现出减色效应,使ct-DNA的圆二色谱正负峰的吸收强度有所降低。该化合物的荧光强度被ct-DNA显著猝灭,猝灭常数为1.25×104 L·mol-1,当ct-DNA的浓度在0~12.0 mg·L-1范围内变化时,荧光猝灭值与ct-DNA的浓度呈现良好的线性关系。该化合物对ct-DNA的检出限为1.63 mg·L-1。据此,O-(硫杂蒽酮-[2]-基)-氧乙酸是一种可用于测定ct-DNA浓度的新试剂,与ct-DNA的作用有嵌入和静电吸引两种方式。 相似文献
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Wail Al Zoubi Abbas Ali Salih Al‐Hamdani Susan Duraid Ahmed Young Gun Ko 《Journal of Physical Organic Chemistry》2018,31(2)
The new Schiff base 1‐[(2‐{1‐[(dicyclohexylamino)‐methyl]‐1H‐indol‐3‐yl}‐ethylimino)‐methyl]naphthalen‐2‐ol (HL) was prepared from 1‐{[2‐(1H‐Indol‐3‐yl)‐ethylimino] methyl}‐naphthalen‐2‐ol and dicyclohexyl amine. From this Schiff base, monomeric complexes [M (L)n (H2O)2 Cl2] with M = Cr, Fe, Mn, Cd, and Hg were synthesized and characterized based on elemental analysis (EA), FT‐IR, mass(MS), UV‐visible, thermal analysis, magnetic moment, and molar conductance. The results showed that the geometrical structural were octahedral geometries for the Cr(III) and Fe(III) complexes, square planer for Pd(II) complex, and tetrahedral for Mn(II), Cd(II), and Hg(II) complexes. Kinetic parameters such as ΔE*,ΔH*, ΔG*, and K of the thermal decomposition stages were calculated from the TGA curves using Coats‐Redfern method. Additionally, density functional theory (DFT) was applied for calculations of both electronic structure and spectroscopic properties of synthesized Schiff base and its complexes. The analysis of electrostatic potential (EPS) maps correlates well with the computed energies providing on the dominant electrostatic nature of N‐H‐‐‐O interactions. The biological activities had been tested in vitro against Staphylococcus aureus, Pseudomonas aeruginosa, as well fungi like Penicillium expansum, Fusarium graminearum, Macrophomina phasealina, and Candida albicans bacteria in order to assess their antimicrobial potential. 相似文献
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采用克莱森缩合反应合成了一种新型的β-二酮化合物1-(4-氨基苯)-4,4,4-三氟丁烷-1,3-二酮(p-NBFA).以其为第一配体,邻菲咯啉(phen)为第二配体,合成出新型Eu(Ⅲ),Tb(Ⅲ)三元配合物.通过元素分析确定了配合物的组成为Eu(p-NBFA)3phen和Tb(p-NBFA)3phen.红外光谱的分... 相似文献
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Solid complexes of lanthanide nitrates with a new unsymmetrical tripodal ligand, bis[(2′-benzylaminoformyl)phenoxyl)ethyl](ethyl)amine (L) have been synthesized and characterized by elemental analysis, infrared spectra and molar conductivity measurements. At the same time, the luminescent properties of the Sm(III), Eu(III), Tb(III) and Dy(III) nitrate complexes in solid state were also investigated. Under the excitation of UV light, these complexes exhibited characteristic emission of central metal ions. 相似文献
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《Journal of Physics and Chemistry of Solids》1987,48(7):635-640
Electrochemical or chemical oxidation of pyrrole-containing complex anions of iron cyanide or iron chloride results in the formation of films or powders of conducting polypyrroles. Freshly prepared films exhibit an additional IR band at ca 1630–1640 cm−1, slowly disappearing in air and not observed in previously studies polypyrrole-based systems. It is possible that this new band is associated with the existence of a CN bond in dehydrogenated pyrrole rings which are transformed into regular pyrrole rings, probably due to the protonation reaction occurring in air and simultaneous bond rearrangement. The polypyrrole structure favours the presence of Fe(CN)64− over Fe(CN)63− since the former is the only iron species detected by Mössbauer spectroscopy in electrochemically prepared samples. It is also the dominant iron species in the samples oxidized chemically. The polypyrrole-containing Fe(CN)64− is more ordered than those containing monovalent anions, as evidence by X-ray diffraction studies. High-spin eron complexes can be inserted into polypyrrole during electrochemical oxidation of pyrrole in non-aqueous solutions containing LiCl/FeCl3. The inserted species exhibit Mössbauer parameters characteristic of slightly distorted FeCl4−. 相似文献
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Ying-Nan Chen Huan-Huan Li Bin Yue Yuan-Yuan Liu Hai-Bin Chu Yong-Liang Zhao 《Journal of luminescence》2012,132(6):1414-1419
Using 2,3-pyrazine dicarboxylate (pzdc2?) as ligand, a series of new terbium complexes Tb2L2(HL)(NO3)10 H2O, Tb2Mg2L4(HL)(NO3)14 H2O, Tb2Ca2L4(HL)(NO3)14 H2O, Tb2Sr2L4(HL)(NO3)14 H2O, Tb2Ba2L4(HL)(NO3)14 H2O, Tb2Cd2L4(HL)(NO3)14 H2O, Tb2Co2L4(HL)(NO3)14 H2O, Tb2Ni2L4(HL)(NO3)14 H2O and Tb2Zn2L4(HL)(NO3)14 H2O (L=pzdc2-) have been synthesized. The complexes were characterized by elemental analysis, ICP-AES, molar conductivity measurement, TG-DSC analysis, IR spectroscopy and UV absorption spectroscopy. The luminescence spectra, luminescence lifetimes and emission quantum efficiencies of the complexes were measured. The results show that doping alkaline earth metal ions have significantly increased the luminescence intensities and quantum efficiencies of the complexes, and the sequence of the quantum efficiencies of the doped complexes is Ba2+>Ca2+>Mg2+>Sr2+. The enhancement of luminescence efficiencies may result from the decrease of the concentration quenching effect of Tb3+ ions, intramolecular energy transfer from the ligands coordinated with doped ions to Tb3+ ions and the lattice distortion of the complexes. The luminescence efficiencies of the Tb3+ ions are also enhanced by doping Cd2+ and Zn2+ ions. However, the complexes doped with Co2+ or Ni2+ ions exhibit luminescence quenching, which is caused by the energy consumed by these two ions in the form of d-d electron transitions. 相似文献
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In this paper, various moieties of ethyl, carbazole and oxadiazole are attached to 2-thiazol-4-yl-1H-benzoimidazole to form a series of diamine ligands. Their corresponding Cu(I) complexes are also synthesized using bis(2-(diphenylphosphanyl)phenyl) ether as the auxiliary ligand. Crystal structures, thermal property, electronic nature and luminescence property of these Cu(I) complexes are discussed in detail. These Cu(I) complexes are found to be efficient green-emitting ones in solutions and the emissive parameters are improved largely by the incorporation of substituent moieties. Detailed analysis suggests that the effective suppression of solvent-induced exciplex quenching is responsible for this phenomenon. On the other hand, the introduction of substituent moieties exerts no obvious influence on molecular structure, thermal stability and emitting-energy of the Cu(I) complexes, owing to their absence from inner coordination sphere. 相似文献
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Novel vanadium dioxide nanorods were fabricated via a surfactant-assisted hydrothermal method at 180 °C for 48 h in the presence of cetyltrimethylammonium bromide (CTAB). The self-assembled samples were characterized by XRD, SEM, TEM, HRTEM and FT-IR. The results show that the products are nanorods, which are pure B phase vanadium dioxide with high crystallinity. The obtained nanorods have diameters of 40-60 nm with lengths up to 1-2 um. The probable formation mechanism of vanadium dioxide is also discussed. 相似文献
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E.D. D'silva D. Narayan Rao Ray J. Butcher S.M. Dharmaprakash 《Journal of Physics and Chemistry of Solids》2011,72(6):824-5369
Nonlinear optical (NLO) materials are useful in many of the industrial applications. New NLO chalcone derivative (2E)-3-[4-(methylsulfanyl)phenyl]-1-(4-nitrophenyl)prop-2-en-1-one (4N4MSP) crystals have been grown by slow evaporation technique at ambient temperature. The grown crystals were subjected to single crystal X-ray diffraction study. The crystal has noncentrosymmetric structure in the orthorhombic system with space group Aba2 and unit cell parameters a=14.0647(15) Å, b=33.738(4) Å and c=6.0039(6) Å. To confirm the presence of various functional groups in the compound, FT-IR spectrum was recorded. The crystal was subjected to TGA/DTA analysis to find its thermal stability. The grown crystals were characterized for their optical transmission and mechanical hardness. The second harmonic generation (SHG) efficiency of the crystal is obtained by classical powdered technique using Nd:YAG laser and its value is 28.57 times that of urea. The laser damage threshold for 4N4MSP crystal was determined using Q-switched Nd:YAG laser. The refractive index values for green and red wavelengths were measured by Brewster angle technique. The dielectric and electrical measurements were carried out to study the different polarization mechanism and conductivity of the crystal. Good thermal, mechanical, transmission and SHG response make it desirable for the NLO applications. 相似文献