查询词典 fullerene

The Diels-Alder cycloadditions of [60] fullerene for preparation of optical limitingmaterials are discussed in chapter 3 and 6. Soluble cycloaddition derivatives of 〓aresynthesized by the reaction of 〓 with indene,1,1'-biindene andcyclopentadiene derivatives.〓Particular, the Diels-Alder cycloaddition of 〓 with1,1'-biindene under controlled conditions affords the stable monoadduct 〓〓of novel structure, which was confirmed by HPLC, FTIR, FD-MS,〓NMR,〓 NMR, HMQC and HMBC spectra, Its two bridgehead cage carbons resonate at70.91ppm, The 〓 NMR spectra showed 38 lines consistent with the 〓 symmetryassociated with [6,6] addition. The 〓 shows similar optical limitingproperties to that of 〓 in toluene for 8ns laser at wave length 532nm. Moreover, thehigh solubility of this adduct in polar solvents such as THF, acetone enables itsincorporation into sol-gel glass matrix. The thin films prepared via the sol-gel methodshow improved OL behaviour compared to those of 〓. The langmuir-Blodgett filmformation and uv-visible absorption of 〓 are also investigated. LBmonolayer of this compound is prepared on the air-water interface at 〓 mol/l. In chapter 4, three water-soluble derivatives of [60] fullerene: fullerol(1), theaddition product (2)of fullerol (1)with polyvinylpyrrolidone and fumaric acidderivative of 〓(3) are synthesized and characterized.

通过Diels-Alder环加成反应，用茚〓和1，1'-联茚〓及取代茂合成了一系列可溶性的〓环加成衍生物，发现可控制反应条件，使1，1'-联茚与〓反应，并高产率地得到具有新颖结构的单加成物，用HPLC、FTIR、FD-MS 及〓、HMQC、HMBC等多种波谱技术对其结构进行表征，测得它的两个〓杂化的桥头碳的化学位移为〓ppm，证明生成的衍生物为6∶6闭式环加成，〓NMR谱中共给出38个信号，表明〓联茚衍生物分子具有〓对称性；在波长532nm，脉冲宽度8ns的激光下，〓联茚衍生物的甲苯溶液的光限幅性能与〓的甲苯溶液相近，由于〓联茚单加成衍生物熱稳定性好，在四氢呋喃，丙酮等极性溶剂中溶解性好，能分别均匀地掺入溶胶-凝胶中，已发现它的溶胶(so1)光限幅性能优于纯〓的光限幅性能；使用Langmuir-Blodgett技术将〓联茚衍生物在空气和水的界面进行了LB单层膜和多层膜实验以及UV-Vis吸收谱研究，通过等温压缩曲线测试，证明浓度为〓〓时，〓联茚衍生物能够形成单层膜。

The results show that the atmosphere has a big influence on the thermal stability of C_(60).C_(60) begins to decompose at 423.5℃in the air,the deomposed peak temperature is 668.5℃,but very stable in the helium atmosphere,only sublimate,the crystal shape of C_(60) has a certain influence to its thermal stability.The synthesized nine kinds of nitro-fullerene derivatives all have good thermal stability and their decomposed peak temperatures all exceed 350℃.The thermal explosion temperature for 5 seconds delay of product 4 is 253℃.The category,number and position of nitryl group in nitro-fullerene derivatives all have influence on their thermal stability.

利用差热分析仪和DSC-TG综合热分析仪对C_(60)及其硝基衍生物的热稳定性进行了研究，结果表明，环境气氛对C_(60)热稳定性影响很大，C_(60)在空气中423.5℃开始分解，放热峰值温度为668.5℃，在氦气中很稳定，仅表现为升华，C_(60)的晶型对其热稳定性也有一定的影响；合成得到的九种硝基富勒烯衍生物都具有较好的热稳定性，分解峰值温度均高于350℃；产物4的5秒爆发点测试结果为253℃。

The discovery of [60]fullerene made us to learn of a completely new world ofcarbon: from plane molecule of low symmetry to ball shape molecule of highsymmetry, from simple molecule to supermolecule of fullerene clathrate and fromone-dimensional superconductivity to three-dimensional superconductivity.

的发现使我们了解到一个全新的碳的世界，从平面低对称分子到全对称的球形分子，从简单的分子到富勒烯笼内包原子的超分子，从一维超导到三维超导。

This paper includes three parts:preparation of fullerene,the theoretical design and synthesis of novel pyrrolidine nitro-derivatives,the investigation of the application of fullerene and its derivatives in high energetic explosives and nitramine modified double base propellant.

本论文主要包括三部分：富勒烯原材料制备研究，新型硝基富勒烯吡咯烷衍生物的理论设计与合成研究，富勒烯及其衍生物在高能炸药和硝胺改性双基推进剂中的应用研究。

The structure of all kinds of [60]fullerene derivatives and their characterization via (13)~C NMR spectros-copy are reviewed and the (13)~C NMR spectroscopic properties of various symmetry [60]fullerene derivatives are mainly dis-cussed .

本文全面综述了多种[60]富勒烯衍生物的结构，阐述了(13)~C NMR谱在[60]富勒烯衍生物结构表征中的应用，重点讨论了不同对称性[60]富勒烯衍生物的(13)~C NMR谱图特征。

Several aminated Fullerene derivatives were synthesized by the reaction of C〓 with phenylamine, diphenylamine and triethylamine etc., the phenomena of fragmentation and aggregation of the aminated Fullerene derivatives in UV laser desorption ionization mass spectrometer was observed, a few nitrogenous poly-Fullerene ions, such as C〓NH, C〓N〓H〓, C〓N〓H〓, C〓N〓H〓, C〓N〓H〓 etc.

对C〓富勒烯与苯胺、二苯胺、三乙胺等形成的加合物在紫外激光解吸电离作用下可以发生不同寻常的裂解和聚合现象进行了研究，认为其形成机理为：上述加合物在紫外激光解吸电离作用下，发生裂解产生C〓NH、C〓N及C〓等离子，然后它们之间发生聚合，形成如：C〓NH、C〓N〓H〓、C〓N〓H〓、C〓N〓H〓、C〓N〓H〓等含氮原子的聚富勒烯离子。

In chapter 5, bounds for the Kirchhoff index of plane graphs especially Fullerene graphs are obtained.

在第五章中，我们得到了平面图，特别是Fullerene图的Kirchhoff指标的界。

Since the discovery of 〓 in 1985, Fullerene science had soon bec...

自1985年〓被发现以来，由于其独特的结构，Fullerene很快就成为多种学科综合研究的前沿。

Using recently discovered property of 2-extensibility of Fullerene graphs,it was proved that the sextets positioned specially in these subgraph structures are resonant.

利用最近发现的Fullerene图的2-可扩性，证明了当Fullerene图中的六边形位于这些闭环链结构的特殊位置时，它们是共振的。

For its special conditions of production, fullerene is hardly yielded through the process of the common earth environment and dynamic geology. The first presence of fullerene in Shungite, Russia in 1992 aroused the interest of studying natural fullerene.

富勒烯的形成条件特殊，普通的地球环境和地质过程不利于富勒烯的生成。1992年天然富勒烯在俄罗斯前寒武纪地层桑加岩中被发现，引起了人们对天然富勒烯研究的兴趣。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。