2014年7月
Radical Ions of Cycloparaphenylenes: Size Dependence Contrary to the Neutral Molecules
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
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- 巻
- 5
- 号
- 13
- 開始ページ
- 2302
- 終了ページ
- 2305
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/jz5009054
- 出版者・発行元
- AMER CHEMICAL SOC
Cycloparaphenylenes (CPPs) have attracted wide attention because of their interesting properties owing to distorted and strained aromatic systems and radially oriented p orbitals. For application of CPPs, information on their charged states (radical cation and radical anion) is essential. Here, we measured absorption spectra of the radical cations and the radical anions of CPPs with various ring sizes over a wide spectral region by means of radiation chemical methods. The peak position of the near-IR bands for both the radical cation and the radical anion shifted to lower energies with an increase in the ring size. This trend is contrary to what is observed for transitions between the HOMO and LUMO of the neutral CPP. The observed spectra of the CPP radical ions were reasonably assigned based on time-dependent density functional theory. These results indicate that the next HOMO and the next LUMO levels are important in the electronic transitions of radical ions.
- リンク情報
- ID情報
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- DOI : 10.1021/jz5009054
- ISSN : 1948-7185
- Web of Science ID : WOS:000338693200022