2021年3月11日
Synthesis of Single‐Handed Helical Spiro‐Conjugated Ladder Polymers through Quantitative and Chemoselective Cyclizations
Angewandte Chemie International Edition
- ,
- ,
- 巻
- 60
- 号
- 20
- 開始ページ
- 11294
- 終了ページ
- 11299
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/anie.202102885
- 出版者・発行元
- Wiley
We report the unprecedented synthesis of one-handed helical spiro-conjugated ladder polymers with well-defined primary and secondary structures, in which the spiro-linked dibenzo[a,h]anthracene fluorophores are arranged in a one-handed twisting direction, through quantitative and chemoselective acid-promoted intramolecular cyclizations of random-coil precursor polymers composed of chiral 1,1 '-spirobiindane and achiral bis[2-(4-alkoxyphenyl)ethynyl]phenylene units. Intense circular dichroism (CD) and circularly polarized luminescence (CPL) were observed, whereas the precursor polymers exhibited negligible CD and CPL activities. The introduction of 2,6-dimethyl substituents on the 4-alkoxyphenylethynyl pendants is of key importance for this simple, quantitative, and chemoselective cyclization. This strategy is applicable to the defect-free precise synthesis of other varieties of fully pi-conjugated molecules and coplanar ladder polymers that have not been achieved before.
- リンク情報
- ID情報
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- DOI : 10.1002/anie.202102885
- ISSN : 1433-7851
- eISSN : 1521-3773
- Web of Science ID : WOS:000637976300001