Host-guest complexation between simple pillar[5]arene and a new type of neutral guests. Issue 12 (1st December 2020)

• Record Type: Journal Article
• Authors: Yan, Xin; Guo, Hao; Cen, Moupan; Huang, Youyou; Zhou, Lin; Zhu, Guohua; Yao, Yong
• Is Part Of: Supramolecular chemistry. Volume 32:Issue 12(2020)
• Page Start: 614
• Page End: 619
• Publication Date: 2020-12-01
• Subjects: Pillar[5]arene -- complex -- supramolecular chemisty -- host-guest interaction -- neutral guests; Macromolecules -- Periodicals; Supramolecular chemistry -- Periodicals; 547.005
• DOI: 10.1080/10610278.2020.1865537
• Languages: English
• ISSNs: 1061-0278

Abstract

ABSTRACT: Pillar[5]arenes are a new type of supramolecular hosts constructed from hydroquinone and their derivatives linked by methylene units. Searching new host-guest interaction between pillar[5]arenes and neutral guests are thus great interesting. Here, four neutral guests (AA0, AA2, AA4 and AA6 ) with both amino and amide groups were prepared from phenol by two steps. The host-guest interactions between perethylated pillar[5]arene (EtP5 ) and guest molecules were investigated in detail by various technologies, including 1 H NMR, 13 C NMR, 2D NOESY NMR, MS analysis and DFT calculation. We found that the guests (AA4 and AA6 ) with longer alkyl chain can form a stable inclusion complex with EtP5 through C–H···O, N–H···O, C–H···N and C–H···π interactions while shorter guests (AA0 and AA2 ) could not. Abstract :