Download file (2.25MB)
Download as zip (1.89MB)

コレクション

引用

説明:

Excited triplet states of acene (3n A*, n being the number of benzene rings) have recently attracted considerable attention because of their useful applications. However, 3n A* with n > 5 have not been experimentally explored, due to the insolubility and instability of the higher acenes. In this study, we succeeded in detecting spin-polarized 37A* by combining the photoprecursor method using a degassed amorphous matrix of o-terphenyl and time-resolved electron spin resonance. 37A* is the longest acene among the 3n A* observed to date. It has been clarified that 37A* is generated by preferential intersystem crossing to the in-plane sublevels and possesses zero-field splitting constants of D = 0.035 cm–1 and E = 0.000 cm–1. The D values for 3n A* (n = 2–7) were found to follow a linear 1/n-dependence, expressed as D(n)=0.180/n+0.011 [cm–1], which provides a quantitative basis for the spatial extent of excitation in even higher 3n A* states.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: Acene, Magnetic property, Electron Spin Resonance, Excited state

刊行年月日: 2026-09-02

出版者: American Chemical Society (ACS)

掲載誌:

• Journal of the American Chemical Society (ISSN: 00027863) vol. 148 issue. 34 p. 36309-36313

研究助成金:

• JSPS Kakenhi 23K17901
• SPRING NA
• Union Tool and TAKEUCHI Scholarship Associations NA
• JST SPRNG PM2121

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/jacs.6c06021

関連資料:

その他の識別子:

連絡先:

更新時刻: 2026-10-06 16:03:50 +0900

MDRでの公開時刻: 2026-10-06 18:23:16 +0900