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本文合成了两个二茂铁基查耳酮系化合物3b-3eC5H5FeC5H4CO(CH=CH)nC6H5(n=1,2,3,4)和6a-6cC5H5FeC5H4(CH=CH)nCOC6H5(n=0,1,2)。为了研究这类三岔共轭体系的结构效应,我们用Mossbauer效应为探针, 研究了二茂铁基Fe核周围的电子云分布情况。并用同系因子(1/a)^1^/^N考查了Mossbauer谱参数QS和IS的同系递变规律。结果表明3系中的茂铁基只起代基作用; 6系中的茂铁基则为端基。3系中共轭链的增长引起QS值的减小, 可能是诱导效应所致, 并讨论了取代基的吸电子效应和茂环与铁核间距离对IS和QS值减小的影响。 相似文献
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对用闪蒸法在77K制备的非晶NdxFe1-x(x=0.20~0.40)薄膜的穆斯堡尔谱表明,其精细场有很宽的分布。这一分布对Nd含量只有微弱的依赖性。薄膜合金中Fe原子的有效磁矩μFe=1.30μB,在所研究的非晶成分的范围内与Nd含量无关。由穆期堡尔谱测量导出的磁有序转变温度Tc与我们在同样条件下(H→0)用磁测量得到的Tc值一致。 相似文献
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F—T合成用Fe—Eu催化剂的穆斯堡尔谱研究 总被引:1,自引:0,他引:1
本文应用穆斯堡尔谱方法,研究了以沉淀法制备的Fe-Eu系F-T催化剂在焙烧、还原、碳化及催化反应后铁的化学形态的变化和助剂Eu对Fe的化学调变作用.结果表明,Eu与Fe存在较强的相互作用,从而稳定了铁晶粒,促进催化剂的还原,并对碳化有延滞作用.Eu_2O_3为铁的优良结构和化学助催化剂. 相似文献
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以Mossbauer谱为手段,研究了用于F-T合成的Fe/Zn催化剂的物相结构,并考察了组成及制备方法的影响,同时还对其还原、碳化行为进行了探讨.发现锌对铁的还原有抑制作用,它能够稳定二价铁不被进一步还原.研究还表明,我们所研制的Fe/Zn催化剂是一种高分散度的铁锌化合物,室温下具有超顺磁特性. 相似文献
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浆态床FT合成中铁催化剂的穆斯堡尔谱赵玉龙,李哲(中国科学院山西煤炭化学研究所煤转化国家重点实验室,太原)(中国科学院地质研究所,北京)关键词穆斯堡尔谱,铁催化剂,浆态床FT合成FT合成铁系催化剂的穆斯堡尔谱的研究工作已经发表很多,但是浆态操作条件下... 相似文献
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Synthesis,Spectra Characterization,Electrochemical Behavior of Silyl Derivatives of Ferrocene 下载免费PDF全文
Ferrocenyl‐substituted silanes via the reaction between mono and dilithio‐ferrocene with trimethyl, trietheyl, vinyldimethyl or t‐butyldimethyl chlorosilanes is prepared. The electrochemical behaviors of these compounds were investigated by cyclic voltammetry. This work describes the electrochemical and electrocatalytic properties of carbon ceramic electrode (CCE) modified with ferrocene composites as a new electrocatalyst material. 相似文献
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Xiao Yan SONG Hai Ping GENG Qi Fang LI 《中国化学快报》2006,17(4):427-430
4-(2-Ferrocenylethenyl)-phenyl-POSS Fc-CH=CH-C6H6-(C5H9)7Si8O12 (FEPS, Fc: ferrocene), containing metal and C=C double bond, was firstly synthesized as a mixture of E/Z isomers by the Wittig reaction. The chemical structure of FEPS was characterized by FTIR, 1H-, 13Cand 29Si-NMR. 相似文献
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Three bis‐tridentate ferrocene‐containing cyclometalated ruthenium complexes, [(Fcdpb)Ru(tpy)]+ ( 1 +), [(Fctpy)Ru(dpb)]+ ( 2 +), and [(Fcdpb)Ru(Fctpy)]+ ( 3 +), have been prepared and characterized, where Fcdpb is the 2‐deprotonated form of 1,3‐di(2‐pyridyl)‐5‐ferrocenylbenzene, tpy is 2,2′:6′,2“‐terpyridine, dpb is the 2‐deprotonated form of 1,3‐di(2‐pyridyl)benzene, and Fctpy is 4′‐ferrocenyl‐2,2′:6′,2”‐terpyridine. Single crystals of compounds 2 + and 3 + have been studied by X‐ray analysis. Complexes 1 + and 2 + displayed two anodic redox waves, whilst three well‐separated redox couples were observed for compound 3 +. A combined experimental and computational study suggested that the ferrocene unit on the Fcdpb moiety in compounds 1 + and 3 + was oxidized first. In contrast, the order of the oxidation of ruthenium and ferrocene in complex 2 + was reversed. Metal‐to‐metal‐charge‐transfer transitions (MM′CT) have been observed for the singly oxidized states 1 2+, 2 2+, and 3 2+ in the near‐infrared region. Hush analysis showed that the metal–metal electronic couplings in compounds 1 2+ and 3 2+ were much stronger than those in compound 2 2+. 相似文献
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研究了10种取代苯甲醛肟和5种取代苯乙酮肟的电化学氧化机理。这二类肟的氧化电位随取代基吸电子能力的增大而增高,并与它们相应的Hammett常数有线性关系。它们在电化学氧化过程中均有iminoxy自由基生成,但最后产物各不相同。用控制电位电解和紫外吸收光谱检法验证了部分电化学氧化产物。因此,电化学氧化法可作为由肟类产生iminoxy自由基的一种方法。 相似文献
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Iole Cerminara Luciano D'Alessio Maurizio D'Auria Maria Funicello Ambra Guarnaccio 《Helvetica chimica acta》2016,99(5):384-392
The kinetics of the reaction of 4‐methoxythiophenoxyacetaldehyde diethyl acetal, 4‐nitrothiophenoxyacetaldehyde diethyl acetal, and 3‐methoxythiophenoxyacetaldehyde diethyl acetal in polyphosphoric acid has been explained. The kinetic behavior has been explained on the basis of aided simulation and on the basis of density functional theory calculations showing a different pathway for 4‐nitrothiophenoxyacetaldehyde diethyl acetal and for 4‐methoxythiophenoxyacetaldehyde diethyl acetal. In this last case, a very fast competing reaction to the dimerization product was observed. 相似文献
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采用液相合成法,以二茂铁甲酸、氧化型谷胱甘肽(GSSG)为原料,苯并三唑-1-四甲基六氟磷酸酯(HBTU)及1-羟基苯并三唑(HOBt)为缩合剂,合成了具有电活性的目标化合物氧化型谷胱甘肽-二茂铁(Fc-GSSG-Fc),其收率为46%,并对其进行了表征。目标化合物Fc-GSSG-Fc的循环伏安扫描结果表明,在0~0.8V范围内出现了一对可逆的氧化还原峰,氧化峰和还原峰电位分别为0.459和0.391V;峰电位之差ΔEp为68mV,峰电流密度之比Ipa/Ipc为1.02,扩散系数D0=1.175×10-8cm2·s-1。利用电化学方法研究了Fc-GSSG-Fc与Zn(Ⅱ)之间的配位特性。实验结果表明,Fc-GSSG-Fc与Zn(Ⅱ)形成了1:1的配合物。 相似文献
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以二茂铁甲酸为原料,经氯代和酰胺化反应合成了两个新型的二茂铁甲酰胺衍生物——N-苯基二茂铁甲酰胺(4a)和N-4-甲苯基二茂铁甲酰胺(4b),其结构经1H NMR,IR和MS表征。利用循环伏安法研究了4a和4b的电化学性质。结果表明,扫描速率为10 m V·s-1时,4a和4b分别在1.2 V~-0.05 V和0.8 V~-0.4 V出现一对氧化还原峰,ΔEp分别为0.09 V和0.05 V,ipc/ipa≈1。 相似文献
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