|
Hokkaido University Collection of Scholarly and Academic Papers >
Institute for Catalysis >
Peer-reviewed Journal Articles, etc >
Cationic polymerization of dibenzofulvene leading to a pi-stacked polymer
This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
| Title: | Cationic polymerization of dibenzofulvene leading to a pi-stacked polymer |
| Authors: | Nageh, Hassan Browse this author | | Wang, Yue Browse this author | | Nakano, Tamaki Browse this author →KAKEN DB |
| Keywords: | Conformation | | Stereochemistry | | Counter ion | | Hypochromism | | Excimer emission |
| Issue Date: | 23-May-2018 |
| Publisher: | Elsevier |
| Journal Title: | Polymer |
| Volume: | 144 |
| Start Page: | 51 |
| End Page: | 56 |
| Publisher DOI: | 10.1016/j.polymer.2018.04.042 |
| Abstract: | Cationic polymerization of dibenzofulvene is conducted using BF3-OEt2, CH3SO3H, CF3CO2H, and CH3CO2H as catalyst or initiator in CH2Cl2 under various conditions. The cationic polymerization leads to controlled stereochemistry and results in a pi-stacked polymer through the polymerization. The polymers synthesized using BF3-OEt2 and CH3SO3H appear to possess different pi-stacked structures. The polymer made using CH3SO3H has an all-trans main-chain C-C bond conformation while the one prepared using BF3-OEt2 may at least partially have a trans-gauche main-chain C-C bond conformation. pi-Stacked conformations are confirmed on the basis of remarkable anisotropy effects on aromatic signals in H-1 NMR spectra, hypochromic effects in electronic absorbance spectra, and dimer (excimer) emission in fluorescence spectra. pi-Stacked conformation is found even for oligomer samples with M-n of as low as about 700, indicating that the conformation created by the cationic polymerization is rather stable. (C) 2018 Elsevier Ltd. All rights reserved. |
| Rights: | © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/78208 |
| Appears in Collections: | 触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 中野 環
|
