在碱性介质中将α-环糊精接枝到纤维素纤维上,并对该功能性纤维的结构进行了表征.用紫外-可见分光光度法研究了接枝α-环糊精的纤维素纤维对芳香族氨基酸的手性分离.结果表明,天然α-环糊精与氨基酸的包结平衡满足Benesi-Hildebrand方程,α-环糊精和L-氨基酸的亲和力大于D-氨基酸,具有分离氨基酸对映体的能力;α-环糊精接枝到纤维素纤维上后,其分子识别能力明显提高.
A novel kind of cellulose fiber grafted with α-cyclodextrin (α-CD) was synthesized in an alkaline solution, and the structure was identified by Fourier transform infrared spectroscopic(FT-IR). Then the functionnal fiber was utilized to chiral separate aromatic amino acids monitored by using spectrophotometry. The experimental results indicate that the inclusion interaction between α-CD and amino acids satisfies the Benesi-Hildebrand equation and the L-isomer has stronger affinity with a-cyclodextrin than D-isomer. The grafting of cellulose fiber with α-cyclodextrin improves its molecule sensing ability. The molecular recognition of the cellulose fiber grafted with α-CD to aromatic amino acids is the order: phenylalanine > tyrosine> tryptophan.
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