کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5186627 | 1381109 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Chiral separation of racemic amino acids with novel polyamides having N-α-acetyl-l-glutamyl residue as a diacid component Chiral separation of racemic amino acids with novel polyamides having N-α-acetyl-l-glutamyl residue as a diacid component](/preview/png/5186627.png)
Novel polyamides with asymmetric carbons in their main chains were obtained from aromatic diamines, 4,4â²-diaminodiphenylmethane (DADPM) or 1,3-phenylenediamine (1,3-PDA), and N-α-protected l-glutamic acid, N-α-acetyl-l-glutamic acid (Ac-l-Glu-OH). Newly prepared polyamides showed optical rotation, implying that optically active polyamides were successfully obtained in the present study. These two types of chiral polyamides showed chiral recognition ability, which was studied by surface plasmon resonance (SPR) spectroscopy; they recognized d-glutamic acid in preference to the corresponding l-isomer. The adsorption selectivity was determined to be 1.66 for 1,3-PDA-Ac-l-Glu and 1.49 for DADPM-Ac-l-Glu. Enantioselective electrodialysis was studied adopting racemic N-α-acetyl-tryptophan (Ac-Trp) mixtures as model pairs of enantiomers. The membranes selectively transported Ac-d-Trp. Permselectivity toward the d-isomer reached 2.03.
Journal: Polymer - Volume 49, Issue 21, 6 October 2008, Pages 4612-4619