@article{aa085461bfad4600a176ee1128542393,
title = "A remarkably strained cyclopyrenylene trimer that undergoes metal-free direct oxygen insertion into the biaryl C-C σ-bond",
abstract = "A remarkably strained cyclopyrenylene trimer CP3 was synthesized and it underwent the first biaryl C-C σ-bond cleavage by direct oxygen insertion without the aid of any metal agents. A priori highly strained CP3 exhibits the longest wavelength emission among all pyrene-based fluorophores due to the intensive electronic interactions between pyrenes. The color of the emission drastically changes from orange to light blue upon oxidation. Theoretical studies revealed that the release of ring strain reasonably drives the reaction between two CP3 molecules and O2. This strain-induced transformation could be also applied for sulfur atom insertion into a biaryl σ-bond.",
author = "Ryo Kurosaki and Hironobu Hayashi and Mitsuharu Suzuki and Julong Jiang and Miho Hatanaka and Naoki Aratani and Hiroko Yamada",
note = "Funding Information: This work was partly supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant No. JP18K14190 (H. H.), JP18K14298 (M. S.), JP17H06445 (M. H.), JP17H03042 (N. A.) and JP26105004 (H. Y.). We thank Prof. A. Osuka (Kyoto Univ.) and Prof. K. Mizuno (NAIST) for fruitful discussion and, Profs. T. Kawai and T. Nakashima (NAIST) for measurements of uorescence quantum yields and Ms Y. Nishikawa for MS measurements. We also acknowledge the computer resources provided by the Academic Center for Computing and Media Studies (ACCMS) at Kyoto University. Funding Information: This work was partly supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant No. JP18K14190 (H. H.), JP18K14298 (M. S.), JP17H06445 (M. H.), JP17H03042 (N. A.) and JP26105004 (H. Y.). We thank Prof. A. Osuka (Kyoto Univ.) and Prof. K. Mizuno (NAIST) for fruitful discussion and, Profs. T. Kawai and T. Nakashima (NAIST) for measurements of fluorescence quantum yields and Ms Y. Nishikawa for MS measurements. We also acknowledge the computer resources provided by the Academic Center for Computing and Media Studies (ACCMS) at Kyoto University. Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry.",
year = "2019",
doi = "10.1039/c9sc01777a",
language = "English",
volume = "10",
pages = "6785--6790",
journal = "Chemical Science",
issn = "2041-6520",
publisher = "Royal Society of Chemistry",
number = "28",
}