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cation radicals
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  阳离子自由基
    These cation radicals form a chemically stable covalent linkage between the nitrogen atom of the amine and the edge plane sites at the carbon electrode surface.
    其组装过程反应机理为,赖氨酸分子中的氨基被氧化成氨阳离子自由基,此自由基再与电极表面的碳形成C—N—键,形成以末端氨基与玻碳电极表面的碳键合的单层膜。
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    Poly(N,N-dimethylaniline)(PDMA) is a novel πconjugated polymer of polyphenylene derivative, which has some unique properties due to its strong donor side groups. This paper first described the structure characteristics of PDMA's cation radicals, then studied the effects of temperature and solution viscosity on its delocalized radicals in detail. It is found that the conformation changes of main chains and side chains on PDMA are both related to its radical stability.
    介绍了聚(N,N-二甲基苯胺)阳离子自由基的结构特点,利用顺磁共振波谱和紫外-可见吸收光谱,研究了温度及溶液粘度对聚合物自由基的影响,发现聚(N,N-二甲基苯胺)的主、侧链结构构象变化与其自由基的稳定性有很大的关系。
短句来源
    Using an electron transfer stopped-flow method,the reactions of short-lived 1-aminopyrene and N-methyl-p-anisidine cation radicals,which were formed via the electron transfer reactions with stable cation radicals,were analysed.
    在电子转移停流注射法中通过电子转移,1 芘胺,N 甲基对茴香胺与较稳定的阳离子自由基反应生成活泼的阳离子自由基并偶合.
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  “cation radicals”译为未确定词的双语例句
    The geometries of neutral indole and phenol, as well as their cation radicals and anion radicals, have been optimized by using AM1 method.
    用 AM1半经验方法 ,优化了吲哚和苯酚中性分子、正离子自由基和负离子自由基的几何构型 .
短句来源
    But Cu2+ formed a short circuit reaction and enhanced the recombination of photodegradation electrons and holes, and retarded the photodegradation of methyl orange. Under solar irradiation, the dye but not the TiO2 was excited by visible light. Cu2+ played the role of an electron-transfer relay, leading to separation of injected electrons and dye cation radicals.
    在太阳光照射下,甲基橙发生自身光敏化氧化反应,受激电子从单线态或三线态的甲基橙分子跃迁到TiO2的导带,Cu2+起到电荷传递中继站的作用,加速了注入电子向H2O2的转移,从而促进了甲基橙的光催化降解。
短句来源
    Experimental results indicate that low parent concentration and nonaqueous solvents are in favor of substituted benzidine produced by tail-tail coupling of cation radicals. The electrode process is considered to be followed by ECE mechanism.
    结果表明,在低浓度的非质子溶剂中邻甲苯胺正离子主要发生“尾-尾”耦合,其电极反应机理为包含随后转化步骤的反应过程,即ECE历程.
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  cation radicals
A study has been made of the influence of the oxidative strength of stable cation radicals (CRs) of parasubstituted triphenylamines on the process of pyrrole polymerization and on the physicochemical characteristics of the resulting polymer.
      
Influence of oxidative strength of stable cation radicals of para-substituted triphenylamines on the process of pyrrole polymeri
      
A new type of fragmentation of organic cation radicals of sulfides, sulfoxides, and sulfones, leading to the elimination of S+, SO+ and SO2+ ions, respectively, has been discovered, and the possible mechanisms of their formation have been proposed.
      
Kinetics of the reduction of organic cations by cation radicals
      
Investigation of the kinetics and mechanism of the formation and transformations of cation radicals in the bromination of substi
      
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A simple pyrex glass electron spin resonance (ESR) spectroelectrochemical cell has been designed and constructed . A piece of platinum rod working electrode is mounted on the bottom of an 1 mm i. d. glass tube to form a cylinder type thin-layer chamber of 4. 7 μl volume. Only 2 ml solution is needed for an experiment. The cell is characterized and used for studies of oxidation reaction of (TPP)H2 in dichloroethane solution. It has been observed that the strength of the ESR signal of electrogenerated π-cation...

A simple pyrex glass electron spin resonance (ESR) spectroelectrochemical cell has been designed and constructed . A piece of platinum rod working electrode is mounted on the bottom of an 1 mm i. d. glass tube to form a cylinder type thin-layer chamber of 4. 7 μl volume. Only 2 ml solution is needed for an experiment. The cell is characterized and used for studies of oxidation reaction of (TPP)H2 in dichloroethane solution. It has been observed that the strength of the ESR signal of electrogenerated π-cation radicals of (TPP) H2 is decreased with increase of electrolysis time. A mechanism of isoporphyrin formation coupled with a proportional reaction is suggested.

设计了一种简易型全玻璃ESR薄层现场波谱电化学池,以高7mm,直径0.5mm的铂柱工作电极安放在直径1mm的玻璃管中,形成体积为4.7μl的薄层池,2ml溶液就可以工作。在二氯乙烷中,进行了薄层电化学性能表征,并对(TPP)H_2的电极氧化过程进行了研究,发现电生的(TPP)H_2阳离子自由基有动力学后行反应。可能的机理是自由基岐化反应伴随着Cl~-引起的异卟啉的生成反应。

An investigation of electrode oxidation processes of(tetra-phenylporphinato) manganese(Ⅲ) Perchlorate, (TPP)Mn(Ⅲ)ClO_4, was carried out during the titration of chloride anions by conventional cyclic voltammetry, thin-layer cyclic voltammetry and spectroelectrochemistry. It was demonstrated that in the presence of one equivalent amount of Cl~-, the first one electron oxidation reaction corresponds to the Mn(Ⅲ)/cation radical oxidation, and the second one electron oxidation corresponds to the cation radical/dication...

An investigation of electrode oxidation processes of(tetra-phenylporphinato) manganese(Ⅲ) Perchlorate, (TPP)Mn(Ⅲ)ClO_4, was carried out during the titration of chloride anions by conventional cyclic voltammetry, thin-layer cyclic voltammetry and spectroelectrochemistry. It was demonstrated that in the presence of one equivalent amount of Cl~-, the first one electron oxidation reaction corresponds to the Mn(Ⅲ)/cation radical oxidation, and the second one electron oxidation corresponds to the cation radical/dication generation followed by an iso-porphyrin formationreaction, however in the presence of two equivalent amount of Cl~-, the first one electron oxidation of Mn(Ⅲ) gives Mn(Ⅳ) porphyrin and the second one electron oxidation generates cation radicals of Mn(Ⅳ) followed by an iso-porphyrin formation reactions. Mechanisms of these redox processes are postulated.

本文研究了氯离子滴定过程中四苯基卟啉合锰氧化过程的常规循环伏安、薄层循环伏安及现场紫外-可见光谱电化学行为。发现在1摩尔比的Cl~-存在下,四苯基卟啉合锰经历了Mn(Ⅲ)/Mn(Ⅲ)环阳离子自由基及进一步氧化为环两价阳离子的过程,并伴随有异卟啉生成的后行化学反应,当2摩尔比的Cl~-存在时,反应机理转变为Mn(Ⅲ)/Mn(Ⅳ),Mn(Ⅳ)/Mn(Ⅳ)环阳离子自由基并伴随有异卟啉生成反应的两个氧化步骤。提出了与这一滴定过程相关的氧化还原反应机理。

The effects of surfactant on aniline electropolymerization have been studied by cyclic voltammetry and potentiostatic step techniques.The experimental results show that the anionic micelle,i.e,sodium dodecylsulphate(SDS),can greatly catalyze the electropolymerization reaction of aniline and reduce its oxidation limited potential to+0.6 V(vs.SCE).In the anionic micellar media,the local concentration of aniline on the surface of electrode may be increased,and the aniline cation radicals are more stabilized...

The effects of surfactant on aniline electropolymerization have been studied by cyclic voltammetry and potentiostatic step techniques.The experimental results show that the anionic micelle,i.e,sodium dodecylsulphate(SDS),can greatly catalyze the electropolymerization reaction of aniline and reduce its oxidation limited potential to+0.6 V(vs.SCE).In the anionic micellar media,the local concentration of aniline on the surface of electrode may be increased,and the aniline cation radicals are more stabilized in the hydrophobic micro-circumstance of micelle,which is available to avoid hydrolysis degradation of polyaniline(PAN) and enhance the stability of the PAN film.The polymerized rate in the presence of 0.1 mol/L SDS increase 25 times than that of solutions without SDS. When the solutions sontaining 10-4 mol/LSDS,the PAN/SDS film growth via a two-dimensional(2-D) instantaneous nucleation under the electro transfer kinetic controlled,and the resulting film have a compact morphology.However,with the addition of cationic surfactant solution,e.g.cetyltrimethylammonium bromid(CTAB),the aniline electropolymerization is severely hindered due to the charge rejection between the aniline cation radicals and the cationic micellar.

利用胶束在电极表面的定向及增溶作用研究了表面活性剂对苯胺电聚合的影响,结果表明:在阴离子表面活性剂十二烷基硫酸钠(SDS)胶束体系中,胶束介质能催化苯胺的电聚合反应,使其氧化电位负移,减少膜的降解,提高膜的稳定性;同时,也使得聚合速率增大,在0.1mol/L的SDS胶束溶液中,其聚合效率提高到不含SDS的纯体系的25倍;在含有10-4mol/LSDS的硫酸浴液中,聚苯胺(PAN)的成核生长为动力学控制下的二维瞬时成核过程。而在阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)中,苯胺的电聚合则严重受阻。

 
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