Separation of Linear and Branched Alkanes Using Host–Guest Complexation of Cyclic and Branched Alkane Vapors by Crystal State Pillar[6]arene. (15th January 2018)

• Record Type: Journal Article
• Authors: Ogoshi, Tomoki; Saito, Kazuki; Sueto, Ryuta; Kojima, Ryosuke; Hamada, Yukie; Akine, Shigehisa; Moeljadi, Adhitya Mangala Putra; Hirao, Hajime; Kakuta, Takahiro; Yamagishi, Tada‐aki
• Is Part Of: Angewandte Chemie. Volume 130:Number 6(2018)
• Page Start: 1608
• Page End: 1611
• Publication Date: 2018-01-15
• Subjects: Alkane -- Makrocyclische Verbindungen -- Pillar[n]arene -- Trennverfahren -- Wirt-Gast-Systeme; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201711575
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Activated crystals of pillar[6]arene produced by removing the solvent upon heating were able to take up branched and cyclic alkane vapors as a consequence of their gate‐opening behavior. The uptake of branched and cyclic alkane vapors by the activated crystals of pillar[6]arene induced a crystal transformation to form one‐dimensional channel structures. However, the activated crystals of pillar[6]arene hardly took up linear alkane vapors because the cavity size of pillar[6]arene is too large to form stable complexes with linear alkanes. This shape‐selective uptake behavior of pillar[6]arene was further utilized for improving the research octane number of an alkane mixture of isooctane and n ‐heptane: interestingly, the research octane number was dramatically improved from a low research octane number (17 %) to a high research octane number (>99 %) using the activated crystals of pillar[6]arene.