标题：Supramolecular self-assemblies of inverted cucurbituril with biogenic amines
作者：Shan, Pei-Hui; Zhang, Zhi-Rui; Bai, Dong; Bian, Bing; Tao, Zhu; Xiao, Xin
作者机构：[Shan, Pei-Hui; Bai, Dong; Tao, Zhu; Xiao, Xin] Guizhou Univ, Key Lab Macrocycl & Supramol Chem Guizhou Prov, Guiyang 550025, Guizhou, Peoples R China 更多
通讯作者地址：[Xiao, X]Guizhou Univ, Key Lab Macrocycl & Supramol Chem Guizhou Prov, Guiyang 550025, Guizhou, Peoples R China.
来源：NEW JOURNAL OF CHEMISTRY
摘要：The interactions between inverted cucurbituril (iQ) and six biogenic amines, namely tyramine (TA), 2-phenylethylamine (PEA), histamine (HI), tryptamine (TR), spermine (SPM), and spermidine (SPD), were studied through H-1 nuclear magnetic resonance (NMR) spectroscopy, UV/vis absorption spectroscopy, fluorescence spectroscopy, isothermal titration calorimetry (ITC), and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). The results showed that iQ exhibits binding affinity towards five of these biogenic amines, with the exception of HI, and that the host-guest binding sites differ depending on the structure of the biogenic amine. For the aromatic amines (TA and PEA), the phenyl groups are completely encapsulated within iQ; for the heterocyclic aromatic amine TR, there is deep inclusion of its indole group in the cavity of iQ; for the fatty amines (SPM and SPD), the central alkyl chain is bound within the central cavity of iQ.