PREPARATION OF FULLERENES BY INCOMPLETE

不完全富勒烯的制备

基本信息

批准号：
08554030
负责人：
OSAWA Eiji
金额：
$ 2.82万
依托单位：
TOYOHASHI UNIVERSITY OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

The purpose of this project is to improve the method of manufacturing fullerenes, especially buckminsterfullerene C60, by incomplete combustion of hydrocarbons, so that fullerenes can be produced in large scale by continuous scheme in the near future.In the first year of the project, we concentrated on the analysis of fullerenes in commercial soot products with the hope of obtaining clues for fuel, burning temperatures, purification and other conditions. After examining a number of traditional as well as modern products from soots, we found that Chinese ink sticks and some charcoals constantly analyzed positively for buckminsterfullerene and sometimes C70 as well. New ink sticks usually contain about 0.1ppm of C60. This level of C60 can be produced by simple burning of benzene, cyclohexane and other hydrocarbons in small flames in air and also agrees with the level detected in ancient geological objects like the black clay from K-T layr, which has been considered to arise from wildfire … More caused by bolide impact. Interestingly enough we found that the C60 contents in Chinese ink sticks decrease with time over a period of several hundred years conforming to the rate law of the first order. We interpret the decrease not by spontaneous decomposition but by Brownian type movements of spherical and smooth C60 molecules in the microstructure of ink sticks.In the second year, we performed numerous burning tests using simple free burning apparatus, while changing fuels and catalysts. Preliminary as they are, we obtained two encouraging results by using metallocene catalysts : (1) addition of catalytic amounts of ferrocence led to up to 500% increase in the yield of C60, and (2) addition of catalytic amounts of nickellocene and titanocene decreased the yields of 60, but produced a new intense peak in the HPLC analysis of the extract with Rf value of 0.65 relative to C60, which is supposed to be an intermediate similar to what was once reported by Howard et al.As the results of these preliminary experiments, we have designed an experimental burning apparatus, which is safe and can be conveniently used for seeking various burning conditions for searching catalysts. Less

制造富勒烯孔的方法的目的，以便可以在不久的将来通过连续计划大规模生产富勒伦，该项目集中于对通用烟灰产品的富勒（Fuller's）分析，希望获得燃料线索，纯化的条件。在检查了许多传统产品和现代产品之后，我们发现中国墨水棒和一些木炭不断地分析Buckminsterfullerene，有时还可以通过简单的Cyclohecnzene生产。在空气中的小火中，其他碳氢化合物在古老的地质物体中被检测到的水平。符合第一阶的定律。，我们通过使用金属钙催化剂有两次co摄效果：（1）催化量的催化量导致C60的产量增加了500％，并且（2）添加催化氧气和钛金降低了60，但产生了60，但产生了。相对于C60，提取物值的HPLC分析中的一个新的强峰与C60相对于C60，这是与霍华德等人曾经报道的中间体相似的。经过燃烧的设备r寻求各种燃烧条件以搜索催化剂