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Back Cover: New Polydentate Trimethylsilyl Chalcogenide Reagents for the Assembly of Polyferrocenyl Architectures (Chem. Eur. J. 23/2014) 下载免费PDF全文
Mahmood Azizpoor Fard Bahareh Khalili Najafabadi Mahdi Hesari Prof. Dr. Mark S. Workentin Prof. Dr. John F. Corrigan 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(23):7172-7172
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Some new star-shaped polydentate ligands were synthesized using 2,4,6-tris(p-formylphenoxy)-1,3,5-triazine as a template and were characterized by infrared, 1H NMR, and 13C NMR spectra and elemental analysis. These products may form polynuclear complexes with metal ions, and the complexes may possess potential applications in the area of electromaterials, optomaterials, magnetic materials, and bio-organic materials. 相似文献
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1,1'-Diacetoacetylferrocene 1 reacted with phenylene-1,3-dioxyactyl hydrazine 2 in absolute ethanol to give the macrocyclic ferrocenyl dipyrazole compound in moderate yield. Determined by X-ray structure analysis, it crystallizes in monoclinic system, space group P21/c with a = 13.7509(4), b = 8.1277(2), c = 21.7472(6) , β = 103.1030(10)°, V = 2367.25(11) 3, Z = 4, Dc = 1.505 g/cm3, R = 0.0353 and wR = 0.0811. The electrochemical studies reveal that redox of Fe+/Fe in ferrocene is a reversible one-electron process. 相似文献
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MacDonald DG Eichhöfer A Campana CF Corrigan JF 《Chemistry (Weinheim an der Bergstrasse, Germany)》2011,17(21):5890-5902
The ferrocene-based trimethylsilyl chalcogenide reagents [FcC(O)OCH(2)CH(2)ESiMe(3)] (2, E=S, 3 E=Se, Fc=[Fe(η(5)-C(5)H(5))(η(5)-C(5)H(4))]) and [FcC(O)NHCH(2)CH(2) SSiMe(3)] (8b) have been synthesized. The reagents were reacted with solubilized transition-metal acetates to yield functionalized complexes and clusters, including the spherical nanocluster [Ag(14)S{SCH(2)CH(2)O(O)CFc)}(12)(PPh(3))(6)] (11, PPh(3) =triphenylphosphine). The complexes were characterized by NMR spectroscopy and X-ray crystallography. The electrochemical behavior of the complexes was explored by cyclic voltammetry and each displayed a single quasi-reversible redox wave with some adsorption to the electrode surface. 相似文献
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以循环伏安法为主要手段,研究了具有可逆特性的二茂铁表面活性剂(N,N-二甲基二茂铁甲基十四烷基溴化铵,Fc14)在0.1 mol/L Na2SO4溶液中形成胶束对电化学行为的影响,并讨论了pH、扫描速度及浓度对Fc14电化学行为的影响.结果表明,Fc14在pH=2左右具有良好的可逆变化特性,在氧化态(I2+)与还原态(I+)之间可实现自由转换;Fc14在玻碳电极上的logIpc~logv呈现良好的线性关系(R20.991).当Fc14的浓度大于2 mmol/L时,电化学氧化过程以扩散控制为基本特征;当浓度小于0.2 mmol/L时,电极吸附现象的特征趋于明显.与此同时,Ipc和扩散系数(D)在Fc14的临界胶束浓度(CMC)附近出现突变,这与Fc14表面张力变化趋势相吻合. 相似文献
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New ferrocenyl‐based valproic acid (VPA) ester derivatives were designed and synthesized according to the reaction of appropriate haloalkylferrocene derivatives with VPA in the presence of K2CO3 and a catalytic amount of 18‐crown‐6 ether. Elemental analyses and Fourier transform infrared, 1H NMR, 13C NMR and mass spectra all well confirmed the predicted molecular structure. This is the first report in which ferrocene has been applied in derivatization of VPA as a chromogenic group. The electrochemical properties of the synthesized compounds were studied using cyclic voltammetry measurements, and energies of the frontier molecular orbitals were determined. In addition, the solubilities of the final compounds were studied in distilled water, phosphate buffer (pH = 7.4) and 0.9% (w/v) NaCl solution. 相似文献
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在电化学领域,由于离子液体有较宽的电化学窗口、高的电导率而吸引着众多的研究者。伏安法常被用于测定离子液体的电化学行为,但一般都是采用金属丝或者不常用的氧化还原物质作参比电极,如I^-/I3^-[8]副和Li^+/Li^[9],而这些参比并不常用于传统的有机溶剂中,与在传统的有机溶剂中测得的结果不具有可比性,为了克服这个问题,IUPAC推荐的一些电势标准物质作为电势测定标准。本文采用玻碳圆盘电极测定了二茂铁(Fc)在离子液体1-甲基3-丁基咪唑铃盐BMIMBF4中的伏安行为,实验表明,在GC电极上还原过程表现为可逆单电子氧化还原过程,其可逆性良好,可将二茂铁应用于离子液体MBIMBF4中作为准参比系统。 相似文献
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N-(m-ferrocenylphenyl)-formamide has been synthesized by the reaction of m-ferrocenyl-aniline with DMF, and characterized by elements analysis, IR, 1H NMR, and X-ray structure determination. The crystallized was in the monoclinic, P21/c space group, with a=0.140 94(3) nm, b=0.102 87(2) nm, c=0.100 26(2) nm, β=104.85(3)° and final R indices [I>2σ(I)] R1=0.072 7, wR2=0.184 5. An infinite one-dimensional chain is formed by intermolecular hydrogen bonding N-H…O. Cyclic voltammetry was studied comparing with the parent compound (m-ferrocenylaniline). CCDC: 243511. 相似文献
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新型含吡啶酰胺基希夫碱多齿配体的合成,光谱,晶体结构及抑菌活性研究 总被引:2,自引:0,他引:2
采用稀释法与胺5倍过量合成了一种新型的含吡啶环的开链二胺1a(N,N′-双(2-氨基乙基)-2,6-吡啶二甲酰胺)。此外,合成了六个新型多齿希夫碱配体N,N′-双(β-R-苯甲醛亚胺基乙基)-2,6-吡啶二甲酰胺[其中,R=H (2a),o-OH (2b),p-OH (2c),m-NO2 (2d),p- N(CH3)2 (2e)]及N,N′-双[γ-水杨醛亚胺基正丙基]-2,6-吡啶二甲酰胺2f。通过元素分析,紫外-可见光谱,红外光谱,氢核磁共振谱及质谱对化合物进行了表征。通过化合物2e的单晶结构X-射线单晶衍射分析表明该晶体属于立方晶系P-1空间群,其晶胞参数为:a=11.010(2) nm,b=13.865(3) nm,c=9.6537(19) nm,α=102.77(2)º,β=92.07(3)º,γ=87.98(3)º,V=1435.7(5) nm3,Z=2,Dc=1.230 mg•cm-3,Mr=531.66。微量热法检测了化合物对大肠杆菌的抑制作用,并初步分析了化合物结构与抗菌活性之间的关系。实验结果表明,所有化合物都对大肠杆菌有抑制作用,其中水杨醛希夫碱的抑菌活性最好。 相似文献
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Takahiro Sasamori Megumi Kobayashi Noriyoshi Nagahora Yusuke Sugiyama Norihiro Tokitoh 《Silicon Chemistry》2007,3(3-4):199-207
Several types of overcrowded ferrocenylsilanes, Tbt(Fc)SiX2(Tbt=2, 4, 6-tris[bis(trimethylsilyl)methyl]phenyl, Fc=ferrocenyl, X = H, OH, and Br) were synthesized and characterized. In addition, DFT calculations for ferrocenylsilanediol systems indicated
the existence of the intramolecular hydrogen bonding between the Fe atom and H–O moiety in Tbt(Fc)Si(OH)2.
Dedicated to Professor Mitsuo Kira on the occasion of his 2005 Wacker Awardy 相似文献
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Two new compounds, FcCHNC6H4COOH ( 1 ) and FcCHNCH2CH2OH ( 2 ) (Fc=C5H4FeC5H5), have been synthesized and characterized by elemental analyses, IR and 1H NMR spectroscopy, and ESI‐MS. Attempt has been made to explain their quasi‐reversible redox behavior evidenced by cyclic voltammetry using density functional theory (DFT) calculations. Light‐harvesting properties of both the compounds and also the starting material, FcCHO ( 3 ), have been studied using these compounds as photosensitizers in TiO2‐based dye‐sensitized solar cells having either a propylene carbonate‐based electrolyte or ionic liquid electrolyte, namely, 1‐propyl‐3‐methyl imidazolium iodide (PMII). Long‐term stability of the photocurrent output of the cell using compound 1 as photosensitizer has been monitored periodically over 1400 h. 相似文献
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Organoseleniumcompoundshaveattractedconsiderableinterestasusefulsyntheticreagentsandintermediatesinorganicsynthesis'.Therearemanymethodsforthesynthesisofselenoesters,whichincludethereductionofthediselenidewithsamariumdiiodide',lithiumaluminiumhydride',etc.Here,wewishtoreportanewmethodforthepreparationoftheactivecadmiumreagentinsitufromSin/CdCI,/HMPAsystem.Itreactswithdiselenidestogeneratecadmium(II)selenolatesandthencadmium(II)selenolatesreactwithacidchloridesandacidanhydridestogiveseleno… 相似文献
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A carbon paste electrode (CPE) modified with ferrocene carboxylic acid (FcCA) and TiO2 nanoparticles was constructed by incorporating TiO2 nanoparticles and ferrocene carboxylic acid into the carbon paste matrix.The electrochemical behavior of captopril (CAP) at the surface of the modified electrode was investigated using electroanalytical methods.The modified electrode showed excellent electrocatalytic activity for the oxidation of CAP in aqueous solutions at physiological pH values.Cyclic voltammetric curves showed that the oxidation of CAP at the surface of the modified electrode reduced its overpotential by more than 290 mV.The modified electrode was used for detecting captopril using cyclic voltammetry and square wave voltammetry techniques.A calibration curve in the range of 0.03 to 2400μmol/L was obtained that had a detection limit of 0.0096 μmol/L (3σ) under the optimized conditions.The modified electrode was successfully used for the determination of captopril in pharmaceutical and biological samples. 相似文献
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Gao J Yan J Beeg S Long DL Cronin L 《Angewandte Chemie (International ed. in English)》2012,51(14):3373-3376
Neoclassical architecture: A new family of heteropolyoxometalates with "pagoda"-shaped building blocks [Te(n) W(6n+3) O(21n+12) ]((6+2n)-) (n=1, 2, 3) was discovered by adding {TeW(6) O(21) } layers on a classic {TeW(9) O(33) } fragment. Linking of the units allowed the generation of nanostructured clusters whose gross conformation is cation controlled. Studies of the redox behaviors of the multi-layered clusters indicate that the Te(IV) template is redox-active. 相似文献
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Liliya Dubenska Olha Dushna Solomiya Pysarevska Mykola Blazheyevskiy 《Electroanalysis》2020,32(3):626-634
In present paper we described a new simple voltammetric method of determination of nefopam alkaloid and its metabolite – N‐oxide. N‐oxide of nefopam is reduced at the dropping mercury electrode (DME) and silver solid amalgam electrodes (AgSAE), which can effectively replace mercury and chemically modified electrodes. The reduction consists of two one‐electron stages each accompanied with one proton transfer. N‐oxide of nefopam can be obtained from nefopam substance by oxidation with potassium peroxymonosulfate. It was studied the effect of various factors on N‐oxide quantitative yield (pH, oxidation duration, reagents concentration) as well as on the reduction of N‐oxide at DME and p‐AgSAE (pH, the nature of background electrolyte, potential and time of accumulation). It was showed that the reduction current linearly increased with increasing of concentration of analgesic. Limit of quantiation is 10?6 mol L?1 at DME and 10?7 mol L?1 at p‐AgSAE. The developed method was applied for the analysis of commercial drug solution for injection “Nefopam” with recovery of 96.7 %, as well as for the spiked human urine samples. Excellent repeatability with a relative standard deviation below 5 % was achieved. 相似文献