4.6 Article

Coordinative Interactions between Porphyrins and C60, La@C82, and La2@C80

期刊

CHEMISTRY-A EUROPEAN JOURNAL
卷 19, 期 2, 页码 557-564

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201202661

关键词

donor-acceptor systems; electron transfer; fullerenes; porphyrinoids; supramolecular chemistry

资金

  1. Ministry of Education, Culture, Sports, Science and Technology of Japan [22750030, 20108001, 20245006, 24350019, 24550145]
  2. Association for the Progress of New Chemistry
  3. Technology of Japan
  4. JST
  5. MICINN
  6. Fonds der Chemischen Industrie (FCI)
  7. Deutsche Forschungsgemeinschaft [GU 517/15-1]
  8. Exzellenzcluster (EAM-Engineering of Advanced Materials)
  9. Strategic Japanese-Spanish Cooperative Program
  10. Grants-in-Aid for Scientific Research [24550145, 22000009, 22750030, 20108001] Funding Source: KAKEN

向作者/读者索取更多资源

For the first time, a C-60 derivative (1) and two different lanthanum metallofullerene derivatives, La@C82Py (2) and La-2@C80Py (3), that feature a pyridyl group as a coordination site for transition-metal ions have been synthesized and integrated as electron acceptors into coordinative electron-donor/electron-acceptor hybrids. Zinc tetraphenylporphyrin (ZnP) served as an excited-state electron donor in this respect. Our investigations, by means of steady-state and time-resolved photo-physical techniques found that electron transfer governs the excited-state deactivation in all of these systems, namely 1/ZnP, 2/ZnP, and 3/ZnP, whereas, in the ground state, notable electronic interactions are lacking. Variation of the electron-accepting fullerene or metallofullerene moieties provides the incentive for fine-tuning the binding constants, the charge-separation kinetics, and the charge-recombination kinetics. To this end, the binding constants, which ranged from log K-assoc=3.94-4.38, are dominated by axial coordination, with minor contributions from the orbital overlap of the curved and planar pi systems. The charge-separation and charge-recombination kinetics, which are in the order of 10(10) and 10(8) s(-1), relate to the reduction potential of the fullerene and metallofullerenes, respectively.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据