| POLYMERS Vol.70 No.9 |
| >> Japanese |
COVER STORY Power of Ladder Structure: Two Bonds Are Mightier Than One Bond |
| Ladder polymers, in which the monomer units are connected by more than two bonds, often exhibit considerably different properties than ordinary polymers consisting of single bonds. It is well-known that pi-conjugated ladder polymers exhibit excellent optical, electronic, thermal, and mechanical properties, and conformationally rigid non-conjugated ladder polymers exhibit considerably high microporosity and gas permselectivity. Interestingly, natural products with high biological activity often contain a large ladder skeleton. However, the synthesis of ladder-shaped molecules and polymers is still difficult due to the lack of highly selective and efficient reactions that can form two or more chemical bonds. Therefore, the development of new reactions and methods for the synthesis of ladder polymers is still a big challenge along with the investigation of properties of ladder polymers. This issue features a wide range of topics, –from recent advances in ladder polymer synthesis and properties, to ladder-type natural products–, providing an introduction to the fascinating world of ladder-shaped molecules and polymers. Editors: ISHIWARI, SENO, TAKAGI, and MATSUI |
| Digest for English Readers | 488
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| Hot Topics in Polymer Science in SPSJ | 491
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| SPSJ PMF Poster Awards 2020 |
| Commentary |
| Ultimate Molecular Structures Open New Avenues in Science | Shigehiro YAMAGUCHI | 492
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| COVER STORY: Highlight Reviews |
| Ladder-Shape π-Conjugated Molecules | Hayato TSUJI,Eiichi NAKAMURA | 493 |
| Chemistries for Ladder Polymerization | Hiroaki SHIMOMOTO, Yan XIA | 496 |
| PolyMANGA | 499 |
| COVER STORY: Topics and Products |
| Conjugated Ladder Polymer Synthesis through New Polymer Reaction | Koji TAKAGI | 500 |
| Fascinating Helical Ladder Polymers | Tomoyuki IKAI | 502 |
| Synthesis of Polymers with a Ladder Repeating Unit by New Reactions | Ryo SHINTANI | 504 |
| Production of Carbon Fiber from Rigid and Linear Polymers | Toshihira IRISAWA | 506 |
| Design, Synthesis, and Evaluation of Function of Ladder-Shaped Polyethers | Tohru OISHI | 508 |
| Polymer Science and I: A Personal Account |
| Heartfelt Thanks | Hajime SHIGEMITSU | 510
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| Messages: “Work and Life” |
| Landscape in Shimane | Hiroki IIDA | 511
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| Front-Line Polymer Science |
| C-H Functionalization Strategies for the Synthesis of π-Conjugated Polymers | Junpei KUWABARA, Takaki KANBARA | 512
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| Messages from SPSJ | 517 |
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