1000 resultados para 60-460A


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The reaction of buckministerfullerene (C-60) with tri-n-blltyltin hydride(n-Bu(3)SnH) in toluene solution has been investigated. According to mass spectrometry analysis, the products of above reaction are C-60(BuH)(n)(n = 1 similar to 3) and Bu(x)Sn(y)H(x) (x = 3 similar to 8, y = 1 similar to 4,approximate to = 0 similar to 3). The reaction maybe provide a new method for the synthesis of alkylated fullerene derivatives. Where C-60 also takes a role of a catalysis of organtic-tin polymerization. The radical reaction mechanism has been discussed.

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In this paper, we introduce a very convenient method to produce water soluble C-60 derivatives- fullerols by the reaction of C-60 with potassium in toluene solution, FT-IR, H-1 NMR and FABMS proved the multi-hydroxyl and C-60 cage structures of the products, The properties of unstability to light, heat, basicity of aqueous solution and the solubility in some common polar solvents were also described.

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C_(60)(OH)_x的简便合成及性质孙大勇,刘子阳,郭兴华,佘益民,周雨,刘淑莹(中国科学院长春应用化学研究所应用谱学开放实验室,长春,130022)关键词C_(60),水溶性富勒醇,钾,不稳定性,溶解度水溶性C60化合物的合成及性质研究作为C60?..

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C_(60)与n-Bu_3SnH的自由基反应研究余益民,郭兴华,刘子阳,刘淑莹,傅芳信,钱明星(中国科学院长春应用化学研究所,长春,130022)(东北师范大学化学系)关键词自由基反应,富勒烯,三丁基锡氢化物,自由基海绵自Kratschmer等[1]实...

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本文简要回顾C(60)发展十年来在功能材科研究领域取得的进展,对一些具有潜在应用前景的研究方向加以简要介绍。

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C_(60)的聚合反应是一项十分有意义的研究课题。“珍珠项链”式的C_(60)聚合物将具有优良的导电和非线性光学性能,有可能成为新型功能高分子材料。自Yeretzian等人于1992年采用激光蒸发C_(60)膜率先在气相中实现C_(60)聚合以来,这一领域的研究一直方兴未艾。但总体来看,采用激光等手段尚不能得到宏观量的结构规整的聚合物。1994年瑞士科学家Pekker等人采用金属钾与C_(60)高温蒸气的反应,在特定的温区得到聚合度逾100000的C_(60)线性聚合物,表明钾对于

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研究了交联XE-60和PEG-20M极性固定相非晶硅膜改性弹性玻璃毛细管柱,在适当的温度下,用过氧化二异丙苯(DCUP)游离基引发交联,成功地制备了XE-60和PEG-20M极性柱,它们均具有柱效高、惰性好、化学稳定性好和耐溶剂、抗腐蚀、耐高温等性能,是一种新型的极性交联柱。

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综述近年在水溶性C_(60)衍生物合成及生物活性方面所取得的进展。

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The DCI MS of C-60 with the reactions of gaseous cyclohexane and cyclohexene have been studied. Several kinds reactions of C-60 have been observed. The results show that the gasphase C-60 has very active chemical properties. The adduct ions of [C60C4H7](+) and [C60C5H7](+) may be formed by [2+4] cycloaddition where one of double bonds of C-60 acted as a dienophilic unit.

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Gas phase ion-molecular reactions of C-60 with the ion system of CS2 have been studied in the ion source of mass spectrometer. It was found for the first time that the sulfuric derivative of C-60-C60S+ was the main ions in the ion source, they did not react with C-60 to form adduct ions due to their highly saturated structures. According to the dynamic analysis, the product ion came from the reaction of C-60 with the fragment ion S+. The adduct ion may have the structure of epsulfide that is advantageous in energy.

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In chemical ionization mass spectrometry (CIMS) gas phase C-60(+) or C-60 can react with fragment ions from three chloromethane and four multichloroethane molecular ions via ion-molecule reactions. A dozen of gas-phase adduct ions of C-60 are observed, and most of them contain chlorine atoms. The results of the comparison and analysis show that the relative intensities of adductions are not directly proportional to the corresponding fragment ions in the MS of reagents,which implies that some fragment ions containing radicals are more reactive with C-60(+) or C-60. This indicates that the alkene-like C-60(+) or C-60 can act as a radical sponge in addition reactions.

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Gas phase reactions of C-60 and C-70 with the ion system of acetone under chemical ionization conditions have been studied. C-60 and C-70 can react with acetyl and oxonium ions, which come from self-chemical ionization of acetone, to form adduct ions. In addition, C-60 and C-70 can accept protons to produce protonated ions. C-70 is more active in the above reactions than C-60 because of its stronger gas-phase basicity. A sigma-bond between C-60 and an acyl carbon atom can be formed to produce stable acetylated C-60 ions. The above results may be relevant to the acetylation reactions of C-60 in the condensed phase.

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Gas-phase ion-molecular reactions of C-60 and C-70 with the ion system of acetone have been studied in this paper. The ions of protoned and acetylized C-60 and C-70 were formed by the reactions of C-60 and C-70 with some ions which existed in the ion system when mass spectrometer worked on chemical ionization conditions. The reactivity of C-70 is greater than that of C-60. Results of quantum chemical calculation for the adduct ions showed a sigma bond between the acyl carbon atom and C-60 may be Formed. These results will provide some valuable informations on the condense-phase acetylization of C-60.

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C_(60)硫衍生物──C_(60)S~+的气相合成刘子阳,郝国仑,郭兴华,刘淑莹(中国科学院长春应用化学研究所,长春,130022)关键词C_(60),CS_2,离子-分子反应自实现C(60)的宏观量合成以来[1],通过将C(60)进行化学衍生进而改变?..

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在气相条件下研究了C_(60)与环己烷及环己烯的离子-分子反应.C_(60)可与上述体系中多种离子发生反应,生成相应的加合离子,表现出C_(60)化学性质的活泼性和多样性.C_(60)与C_4H_7~+和C_5H_7~+离子反应可能生成[2+4]环加成的加合离子.