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Title: Molecular weight fractionation by confinement of polymer in one-dimensional pillar[5]arene channels
Authors: Ogoshi, Tomoki
Sueto, Ryuta
Yagyu, Masafumi
Kojima, Ryosuke
Kakuta, Takahiro
Yamagishi, Tada-aki
Doitomi, Kazuki
Tummanapelli, Anil Kumar
Hirao, Hajime
Sakata, Yoko
Akine, Shigehisa
Mizuno, Motohiro
Keywords: Polymer Chemistry
Issue Date: 2019
Source: Ogoshi, T., Sueto, R., Yagyu, M., Kojima, R., Kakuta, T., Yamagishi, T. a., . . . Mizuno, M. (2019). Molecular weight fractionation by confinement of polymer in one-dimensional pillar[5]arene channels. Nature Communications, 10(1), 479-. doi:10.1038/s41467-019-08372-1
Series/Report no.: Nature Communications
Abstract: Confinement of polymers in nano-spaces can induce unique molecular dynamics and properties. Here we show molecular weight fractionation by the confinement of single polymer chains of poly(ethylene oxide) (PEO) in the one-dimensional (1D) channels of crystalline pillar[5]arene. Pillar[5]arene crystals are activated by heating under reduced pressure. The activated crystals are immersed in melted PEO, causing the crystals to selectively take up PEO with high mass fraction. The high mass fractionation is caused by the greater number of attractive CH/π interactions between PEO C-H groups and the π-electron-rich 1D channel of the pillar[5]arene with increasing PEO chain length. The molecular motion of the confined PEO (PEO chain thickness of ~3.7 Å) in the 1D channel of pillar[5]arenes (diameter of ~4.7 Å) is highly restricted compared with that of neat PEO.
DOI: 10.1038/s41467-019-08372-1
Schools: School of Physical and Mathematical Sciences 
Rights: © 2019 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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