Mass spectrometric investigation of the aggregation and coalescence of fullerenes in C60-modified poly(N-vinylcarbazole) by UV-laser ablation
✍ Scribed by Yu Chen; Zu-En Huang; Rui-Fang Cai; Bo-Cheng Yu; Osamu Ito; Jun Zhang; Wei-Wen Ma; Chao-Fan Zhong; Li Zhao; Yu-Fen Li; Lei Zhu; Mamoru Fujitsuka; Akira Watanabe
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 226 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0887-6266
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✦ Synopsis
The phenomena of aggregation and coalescence of fullerenes in the UVlaser ablation time-of-flight mass spectrometric investigation of C 60 -modified poly(Nvinylcarbazole) both in the positive and in the negative ion channels have been observed. The results indicate that in C 60 chemically modified PVK (C 60 -PVK) copolymer the nascent fullerene fragments ruptured from main chain can easily coalesce into large fullerenes through collisions, whereas in the C 60 -doped PVK the aggregation and coalescence of C 60 were relative weak due to nonbounding action and incomplete charge transfer behavior between C 60 and PVK. Furthermore, the photoinduced electron transfer behavior between C 60 and carbazole units in the C 60 chemically modified poly(Nvinylcarbazole) in benzonitrile by laser flash photolysis at 355 nm has also been investigated. Efficiency of the anion radical of C 60 in copolymer at 1080 nm is higher than that of the C 60 -doped poly( N-vinylcarbazole) polymers. The formation of a C 60 radical anion may be ascribed to photoinduced electron transfer between C 60 pendanted on the main chain backbone and the inter-, and intrachain carbazole units in the copolymer.