HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

Determination of the critical chain length for macromolecular crystallization using structurally flexible polyketones

Files in This Item:

The file(s) associated with this item can be obtained from the following URL:

Title: Determination of the critical chain length for macromolecular crystallization using structurally flexible polyketones
Authors: Ide, Yuki Browse this author
Manabe, Yumehiro Browse this author
Inaba, Yuya Browse this author
Kinoshita, Yusuke Browse this author
Pirillo, Jenny Browse this author
Hijikata, Yuh Browse this author
Yoneda, Tomoki Browse this author →KAKEN DB
Shivakumar, Kilingaru I. Browse this author
Tanaka, Saki Browse this author
Asakawa, Hitoshi Browse this author
Inokuma, Yasuhide Browse this author →KAKEN DB
Issue Date: 14-Sep-2022
Publisher: Royal Society of Chemistry
Journal Title: Chemical science
Volume: 13
Issue: 34
Start Page: 9848
End Page: 9854
Publisher DOI: 10.1039/d2sc03083g
Abstract: Critical chain length that divides small molecule crystallization from macromolecular crystallization is an important index in macro-organic chemistry to predict chain-length dependent properties of oligomers and polymers. However, extensive research on crystallization behavior of individual oligomers has been inhibited by difficulties in their synthesis and crystallization. Here, we report on the determination of critical chain length of macromolecular crystallization for structurally flexible polyketones consisting of 3,3-dimethylpentane-2,4-dione. Discrete polyketone oligomers were synthesized via stepwise elongation up to 20-mer. Powder and single crystal X-ray diffraction showed that the critical chain length for polyketones existed at an unexpectedly short chain length, 5-mer. While shorter oligomers adopted unique conformations and packing structures in the solid state, higher oligomers longer than 4-mer produced helical conformations and similar crystal packing. The critical chain length helped with understanding the inexplicable changes in melting point in the shorter chain length region resulting from chain conformations and packing styles.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 猪熊 泰英

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University