Molecular Recognition Studies on Supramolecular Systems(一)—— Inclusion Complexation of the Novel Amino Acid Modified β-CDs with TNS

Abstract

Abstract: The fluorescence spectra have been studied in phosphate buffer aqueous solution(pH=7.20) to give the stability constants( K_s) for the supramolecular system formed by L-Pro-β-CD(1), L-Leu-β-CD(2), and L-Ileu-β-CD(3) with TNS. The results obtained indicate that the binding ability of modified β-cyclodextrins(1) with TNSis larger than that of 2 and 3. One possible explanation is that there are different substitutes among the three modified β-cyclodextrins.The molecular binding ability is discussed from the size-fit concept between the host and the guest molecules. The results indicate that the substitute on the side arm attached to the edge of β-CDplays a crucial role in guest inclusion.

Key words: Cyclodextrin, Amino acid modified β-CD, TNS, Inclusion complexation

CLC Number:

O641.4

TrendMD:

JIN Lan, SUN Shi-Xin, LIU Yu  . Molecular Recognition Studies on Supramolecular Systems(一)—— Inclusion Complexation of the Novel Amino Acid Modified β-CDs with TNS[J]. Chem. J. Chinese Universities, 2000, 21(3): 412.

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Molecular Recognition Studies on Supramolecular Systems(一)—— Inclusion Complexation of the Novel Amino Acid Modified β-CDs with TNS

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