SUPRAMOLECULAR INTERACTION BETWEEN p-SULFONATED CALIXARENES WITH TYROSINE

摘要

The fluorescence spectra showed the larger the cavity size was, the stronger was the inclusion ability between p-sulfonated calix[n]arenes and tyrosine. The results of ~1HNMR and the cavity matching effect indicated that the phenol unit of tyrosine entered the p-sulfonated calix[4]arene cavity, and the guest tyrosine molecule vertically penetrated the cavity of p-sulfonated calix[6]arene in two different inclusion modes. Tyrosine was present in the upper part of the p-sulfonated calix[n]arene cavity. The different cavity size and flexible structure of p-sulfonated calix[n]arene led to different host-guest inclusion modes. The tyrosine tended to enter the larger hydrophobic cavity of p-sulfonated calix[n]arene.