共查询到20条相似文献,搜索用时 359 毫秒
1.
二茂铁具有独特的夹心刚性结构,炔基具有刚性和线性,茂铁基与炔基的结合使得二茂铁炔基具有两者的优点,成为用途广泛的刚性构筑块, 而且茂铁炔基因体系扩展的π-π电子离域产生了分子导线效应。本文介绍了近几年来茂铁炔基在分子导线、分子开关、分子马达、化学传感器、非线性光学材料、催化剂等光电功能材料领域的研究进展。 相似文献
2.
硫醇分子链长对氧化还原自组装多层膜电化学行为影响的初步研究(英文) 总被引:1,自引:0,他引:1
以烷基硫醇和二茂铁衍生物构建的氧化-还原自组装多层膜为模型体系,研究烷基硫醇分子链长对多层膜电化学行为的影响.实验表明,二茂铁基团和电极之间的电子传递反应速率随两者距离的增加呈现指数级下降的趋势;烷基硫醇分子链长对自组装膜电化学行为的影响于不同情况下表现不同.本实验条件下,当多层膜上的电活性基团与电极比较接近时,长链分子自组装膜呈现较强的电化学响应.而当电极与电活性基团之间的距离较远时,短链烷基硫醇分子自组装膜呈现较强的电化学响应. 相似文献
3.
二茂铁酰基衍生物的研究进展 总被引:15,自引:2,他引:15
综述了近年来二茂铁酰基衍生物如二茂铁甲醛、二茂铁酮和二茂铁甲酸的合成及反应的研究进展,简要介绍了它在生物学、医学和电化学等领域的应用。参考文献73篇。 相似文献
4.
5.
6.
以甲酰基二茂铁和2-乙酰基吡啶为原料, 合成了3个1-芳香酰基-3-(2-吡啶基)-5-二茂铁基-2-吡唑啉衍生物(3~5), 通过红外光谱、质谱、1H NMR、13C NMR和元素分析对其进行了表征, 并对化合物4的单晶结构进行了解析. 研究了该类化合物的电化学性质及紫外、荧光光谱, 并借助密度泛函理论(DFT)计算从理论上加以解释. 相似文献
7.
8.
9.
10.
以p、m-二茂铁苯胺和p-乙酰硫基苯甲醛反应,合成了两个含p-乙酰硫苯基的二茂铁席夫碱化合物,硼氢化钠还原碳氮双键的同时对乙酰硫基脱保护,得到了两个二硫键桥联双二茂铁芳胺化合物。用熔点,红外光谱,核磁共振氢谱和高分辨质谱对相关化合物进行了结构表征。电化学循环伏安研究表明,p、m-二茂铁苯胺所形成的席夫碱及其还原脱保护产物的循环伏安性质略有差异,其中仲氨基和二茂铁处于对位的二硫键桥联双二茂铁芳胺容易失去电子。电化学研究表明,通过二硫键的均裂和Au-S键可将含刚性芳香环的二茂铁分子通过自组装的方法修饰在金电极表面,可作为潜在的生物化学传感器。 相似文献
11.
Compounds containing two or more ferrocenyl groups are well-known precursors for mix-valent compounds[1-2]. It was believed that the interaction between the ferrocenyl groups are facilitated by the conjugate bridge between them. Many such researches were reported. In this paper, we report the electrochemical behavior of alkyl-bridged biferrocene, their acylation derivatives and corresponding reduction products, and transition metal complexes with alkyl-bridged biferrocenyl aryl hydrazone and β-alkyl-bridged-α,β-unsaturated ketones. Though the bridging alkyl group prevents conjugation between the two ferrocenyl group, they show characteristics of mix-valence species. The extent of interaction between the two ferrocenyl groups is influenced by the distance between the iron atoms, the substituents on the cyclopentadienyl ring, transition metal ions and their coordination modes. 相似文献
12.
合成并表征了一种新的非两亲性共轭桥联双二茂铁衍生物,该化合物在空气/水界面上易形成较稳定的单分子膜,与花生酸形成的混合膜易组装成LB膜,紫外-可见吸收光谱表明:LB上膜分子中发生了聚集,扫描电镜观察了混合单层LB膜的表面形貌及膜的相分离。循环伏安研究表明:混合单层LB膜修饰电极对Fe(CN)/Fe(CN)离子对的电化学反应具有良好的电催化效应,对抗坏血酸电化学氧化具有明显的促进作用。 相似文献
13.
Alexander S. Romanov Tatiana V. Timofeeva Mikhail Yu. Antipin 《Journal of organometallic chemistry》2011,696(23):3822-3825
Novel radial tetra(ferrocenyl)- and tetra(cymantrenyl)cyclobutadienecobalt complexes were prepared by metal carbonyls free protocol of [2 + 2] cycloaddition reaction of 1,2-diferrocenyl- or 1,2-dicymantrenylethynes with chlorotris(triphenylphospine)cobalt(I) and carboethoxycyclopentadienide sodium with good yields. The molecular structure of these products was confirmed with X-ray analysis, and their electrochemical behavior was studied. 相似文献
14.
Poly (ferrocenyl glycidyl ether) was synthesized by polymerization of 2-[(4-ferrocenylbutoxy)methyl]oxirane (FcEpo) using toluene solution of methylaluminoxane as the catalyst. Copolymerization of 2-[(4-ferrocenylbutoxy)methyl]oxirane with epichlorohydrin was used for the synthesis of another ferrocenyl based poly (epichlorohydrin). Ferrocenyl based poly (glycidyl azide), GAP, was synthesized by treatment of sodium azide with this copolymer in DMF as solvent at room temperature. The synthesized ferrocenyl based polymers were characterized by FT-IR, 1HNMR, UV–Vis, TGA, DSC and GPC analysis. The UV–Vis spectra of synthesized polymers show the absorption band of ferrocene moiety at about 450 nm. The TGA and DSC analysis show that poly (ferrocenyl glycidyl ether) has good thermal stability. The TGA analysis shows that the copolymerization of 2-[(4-ferrocenylbutoxy)methyl]oxirane with epichlorohydrin improved the thermal stability of the copolymer. The GPC analysis of poly (ferrocenyl glycidyl ether), ferrocenyl based poly (epichlorohydrin) and Ferrocenyl based poly (glycidyl azide) show the PDI between 1.14–1.17. The electrochemical behavior of synthesized polymers was investigated by cyclic voltammetry (CV) measurements. The CV curves of synthesized polymers show good electrochemical performance and there is one redox system with the single-electron reversible reaction that associated with ferrocene moiety in polymers structure. The anodic and cathodic peak currents increased with scan rate confirmed redox reactions in the system are kinetically fast diffusion-controlled reactions. 相似文献
15.
Gibbs JM Park SJ Anderson DR Watson KJ Mirkin CA Nguyen ST 《Journal of the American Chemical Society》2005,127(4):1170-1178
The syntheses of several norbornene block copolymers containing oligonucleotide and ferrocenyl side chains and their use in the electrochemical detection of DNA are described. Two kinds of DNA-containing block copolymers with either ferrocenyl or dibromoferrocenyl groups were prepared via ring-opening metathesis polymerization (ROMP). Based on these two distinct ferrocene derivatives, a triblock copolymer labeling strategy was developed. With this strategy, the identity of DNA target can be determined by the E1/2s of the ferrocenyl moieties and the ratio of peak currents. These polymers exhibit predictable and tailorable electrochemical properties, high DNA duplex stability, and unusually sharp melting transitions, which are highly desirable characteristics for DNA detection applications. Significantly, single-base mismatches could be easily detected using two distinct block copolymers as dual-channel detection probes in an electrochemical DNA detection format. 相似文献
16.
17.
《Comptes Rendus Chimie》2017,20(2):197-205
Ferrocenyl silanes are prepared by treatment of Grignard reagents produced from 4-chlorobutylferrocene derivatives and chlorodimethylsilane in THF. Butenylferrocenes are prepared by the elimination reaction of 4-chlorobutylalkylferrocenes by sodium tert-butoxide in DMSO. A hydrosilylation reaction between a butenyl compound and ferrocenylsilane occurred in dry toluene at room temperature in the presence of the Karstedt catalyst to produce the desired binuclear ferrocenyl compound in good to high yields. The electrochemical behavior of new ferrocenyl compounds were studied by cyclic voltammetry in CH3CN/0.1 M LiClO4, and the relation between the peak currents and the square root of the scan rate, showed that the redox process is diffusion-limited. 相似文献
18.
A new ferrocene based molecule behaves as a dual channel signaling chemosensor for Cu2+ over other metal ions. The perturbations in the absorption pattern and electrochemical behavior of the chemosensor are presented. These have been proposed to be caused by the interaction of Cu2+ with the d-electrons and the electron rich π-system of the ferrocenyl derivative. The sensing event is manifested by a high energy shift in the ligand centered π-π* absorption and appearance of a new redox wave at more positive potential, in addition to Fe(II)/Fe(III) couple wave (two wave electrochemical behavior). 相似文献
19.
In this study, the redox active molecule N-ferrocenylmethyl-N-propargylimidazolium bromide was immobilized onto the surface of an electrode. The surface modification was performed by coupling the electrochemical reduction of the 4-azidophenyldiazonium generated in situ with a copper(I) catalyzed click chemistry reaction. Surface and electrochemical investigations suggest the attachment of a monolayer of redox active molecules containing an ionic liquid framework onto the electrode surface. Furthermore, scanning electrochemical microscopy studies revealed the conductive behavior of the attached ferrocenyl moieties on the ITO surface. 相似文献
20.
Yu CJ Wang H Wan Y Yowanto H Kim JC Donilon LH Tao C Strong M Chong Y 《The Journal of organic chemistry》2001,66(9):2937-2942
We have synthesized two novel phosphoramidites with a ferrocenyl moiety at the 2'-ribose position linked through a butoxy linker. Using automated DNA/RNA synthesis techniques, oligonucleotides containing ferrocene at various positions were prepared and characterized by HPLC, MALDI-TOF mass spectrometry, and electrochemistry. Thermal stability studies of the ferrocene-modified DNA duplexes revealed that introduction of one or two ferrocenyl complexes does not result in an observed change of the T(m) values of the corresponding DNA duplexes when compared to the nonmodified hybrids. These data indicate that the introduction of a ferrocenyl group at the 2'-position of the ribose ring containing either a purine or pyrimidine base has no effect on the stability of the modified DNA. The electrochemical behavior of the ferrocene-containing DNA was examined by cyclic voltammetry. The modified 2'-ferrocene-oligonucleotides are electrochemically active and can be used as signaling probes for the electronic detection of nucleic acids on bioelectronic sensors. 相似文献