为了为富勒烯的多样性导向装饰和连接提供一种有效且通用的方法,我们报告了第一个基于异氰酸酯-多组分反应(I-MCR)的C 60衍生化策略。该方法包括使用Passerini和Ugi反应在羧酸官能化的富勒烯上组装假肽支架(即N-烷基化和二肽,类肽)。该方法显示了羰基和异氰酸酯组分的广泛底物范围,尽管已证明Ugi反应仅对芳族胺有效。该方法已成功用于寡肽和聚乙二醇链(PEG)与C 60的连接,以及用于建造双天线以及PEG固定的二聚体富勒烯。对于所分析的所选化合物,形成1 O 2的量子产率显着。
15N-labeled ionic probe attachment mass spectrometry of carbon clusters
作者:Fumihiro Ito、Kentaro Yamaguchi
DOI:10.1039/c0ob00887g
日期:——
An ionization method that uses metal-complex-based ionization probes, malonic acid 3-[2,6-bis(4,4-dimethyloxazolin-2-yl)pyridin-4-yloxy]propyl ethyl ester (EM-TMpybox) and potassium N-3-[2,6-bis(4,4-dimethyloxazolin-2-yl)pyridine-4-yloxy]propyl} aminoacetate (Sar-TMpybox), was developed for isotope ratio analysis and the effective ionization of unsubstituted carbon clusters. The preparation of Sar-TMpybox and EM-TMpybox and their applications in cold-spray ionization mass spectrometry are reported. A probe applicable to a substituted fullerene is also demonstrated.
Exciplex Intermediates in Photoinduced Electron Transfer of Porphyrin−Fullerene Dyads
作者:Tero J. Kesti、Nikolai V. Tkachenko、Visa Vehmanen、Hiroko Yamada、Hiroshi Imahori、Shunichi Fukuzumi、Helge Lemmetyinen
DOI:10.1021/ja0257772
日期:2002.7.1
The photoinducedelectrontransfer in differently linked zinc porphyrin-fullerenedyads and their free-base porphyrin analogues was studied in polar and nonpolar solvents with femto- to nanosecond absorption and emission spectroscopies. A new intermediate state, different from the locally excited (LE) chromophores and the complete charge-separated (CCS) state, was observed. It was identified as an
在极性和非极性溶剂中使用飞秒到纳秒吸收和发射光谱研究了不同连接的锌卟啉-富勒烯二元组及其游离碱卟啉类似物的光致电子转移。观察到一种新的中间态,不同于局部激发 (LE) 发色团和完全电荷分离 (CCS) 状态。它被鉴定为激发复合物。激基复合物先于极性苯甲腈中的 CCS 态和非极性甲苯中富勒烯的激发单线态。二元组的行为通过使用涉及激基复合物和 LE 发色团之间平衡的常见动力学方案进行建模。该方案适用于所有研究的卟啉-富勒烯化合物。反应步骤的速率取决于部分之间的连接类型。