2025-05-01 理化学研究所,名古屋大学
本研究で開発したカチオン性炭化水素ナノベルト（MCPPカチオン）
＜関連情報＞
- https://www.riken.jp/press/2025/20250501_1/index.html
- https://pubs.rsc.org/en/content/articlelanding/2025/sc/d5sc01305d
メチレン架橋[6]シクロパラフェニレンの化学酸化により合成された安定なカチオン性ナノベルト Stable cationic nanobelts synthesized by chemical oxidation of methylene-bridged [6]cycloparaphenylene
Nobushige Kai, Hideya Kono, Timo Stünkel, Daiki Imoto, Riccardo Zanasi, Guglielmo Monaco, Francesco F. Summa, Lawrence T. Scott, Akiko Yagi and Kenichiro Itami
Chemical Science Published:23 Apr 2025
DOI:https://doi.org/10.1039/D5SC01305D
Abstract
Nanobelts are cyclic arenes that only consist of annulated structures. Recently, various types of nanobelts have been synthesized and their unique properties have been unveiled. However, cationic nanobelts without heteroatoms have been rarely synthesized, and their properties are of significant interest from both fundamental and application perspectives. Herein, we report the synthesis of radical cationic and dicationic hydrocarbon nanobelts by chemical oxidation of methylene-bridged [6]cycloparaphenylene ([6]MCPP). These cationic species are remarkably stable in air, which made it possible to measure and uncover their structural and electronic properties. Notably, the [6]MCPP dicationic salt has sharp absorption and fluorescence bands at longer wavelengths than those of neutral [6]MCPP, close to the near-infrared region. From both experimental and theoretical investigation, the existence of a strong diatropic belt current in [6]MCPP dication was indicated. In addition, a longer lifetime was observed for the hexamethyl[6]MCPP dicationic salt than for the [6]MCPP dicationic salt in solution.
