摘要
利用对叔丁基杯[8]芳烃对烟炱中C_(60)的选择性配合作用使烟炱邻二氯苯(ODCB)提取物中的高碳成份得到富集.用高效液相色谱(HPLC)分离,得到C_(70),C_(76),C_(78),C_(84)和C_(86)五种高碳富勒烯及相应的UV-Vis光谱.实验中发现ODCB提取物中C_(78)的比例与其它溶剂提取物略有差别,富勒烯的保留时间的对数与富勒烯的碳原子数之间存在良好的线性关系,(即富勒烯HPLC碳数规律),随着富勒烯对称性的降低,UV-Vis光谱吸收极值增多,谱带有红移趋势.通过对质谱,UV-Vis光谱,HPLC及富勒烯碳数规律的分析,对C_(86)的存在和分离进行了探讨.
Higher fullerenes in ODCB extract of primary soots by arc - heating method were concentrated by selective complexation between t - butyl calixene[8] and C60. Better separation and UV - Vis spectra of higher fullerenes C70 , C76, C78, C84 and C86 were achieved using Waters 2010 - HPLC. We found that the ratio of C78 isomers extracted by ODCB is different from that of extracts by other solvents such as toluene and CS2. In the process of HPLC seperation, we found that the logarithm of retention time ln(tR) has a linear relationship with the number of fullerene carbons (Carbon Number Rule of Fullerenes) , we also found that the spectra of fullerenes have a tendency of red - shift associated with the reduction of the symmestry of fullerenes. The existence and seperation of C86 were discussed by analysizing the LD -TOFMS.UV - Vis,HPLC and Carbon Number Rule of Fullerenes.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1999年第1期53-58,共6页
Acta Chimica Sinica
基金
国家自然科学基金(29773022)资助项目
关键词
高碳富勒烯
质谱
光谱
富勒烯
HPLC
C86
higher fullerenes, MS, UV - Vis spectra, carbon number rule of fullerenes, C86
