Chiral Recognition of Amino Acid Enantiomers by a Crown Ether: Chiroptical IR-VCD Response and Computational Study
作者:Juan Ramón Avilés-Moreno、María Mar Quesada-Moreno、Juan Jesús López-González、Bruno Martínez-Haya
DOI:10.1021/jp405027s
日期:2013.8.15
ether ring. Additionally, one or two of the carboxylic side groups of the crown ether interact with the −COH and −COOH groups of serine. Chiral selectivity is probed by recording the IR and VCD spectra of dried thin films obtained from aqueous solutions with equimolar concentrations of the two serine enantiomers and the macrocycle. The results demonstrate a marked chiral recognition of l-SerH+ relative
我们报告了通过冠醚(all-S)-(18-crown-6)-2对质子化形式(l / d -SerH +)的氨基酸丝氨酸进行手性识别的组合实验和计算研究,3,11,12-四羧酸(S -18c6H 4)。红外和振动圆二色性光谱法(IR-VCD)用于表征S -18c6H 4与l -SerH +和d -SerH +形成的配合物的手性响应。由水溶液获得的干燥薄膜中的对映体。该研究的重点是与冠醚衍生物和丝氨酸之间的分子间氢键直接相关的振动模式,该模式负责冠-丝氨酸的结合,即C═O和CO拉伸模式,以及CO-H弯曲模式,可在波数900–2000 cm –1范围内产生强烈的IR和VCD信号。在不同级别的密度泛函理论下,结合计算结构调查和优化对实验光谱进行了分析。发现该配合物的构象景观主要受冠醚主体的碗状结构和质子化的R-NH 3 +的三脚架配位支配。丝氨酸基团与中心醚环的氧原子相连。另外,冠醚的一个或两个羧
Enantioselective Optode Membranes with Enantiomer Selectivity for (<i>R</i>)- and (<i>S</i>)-l-Phenylethylammonium Ions
作者:Petr Holý、Werner E. Morf、Kurt Seller、Wilhelm Simon、Jean-Pierre Vigneron
DOI:10.1002/hlca.19900730505
日期:1990.8.8
The recently developed general principle of ion-selectiveoptode membranes, based on conventional ionophores, was employed to design a new approach to the determination of enantiomeric excess. Highly lipophilic chiral crown derivatives, exhibiting a high selectivity for a chiral ammonium guest cation, are combined with a H+-selective chromoionophore in a plasticized PVC membrane. The enantiomer recognition
Chiral recognition and discrimination studies of tyrosine enantiomers on (−)‐18‐crown‐6‐tetracarboxylic acid as a chiral selector by nuclear magnetic resonance spectroscopy and docking simulations
作者:Gaeun Lee、Suraj Adhikari、Sunho Lee、Jeong Yeon Lee、Yun‐Cheol Na、Wonjae Lee、Eunjung Bang
DOI:10.1002/chir.23656
日期:2024.3
significance of chiral biomolecules, such as amino acids, in our daily routines, we performed chiral recognition and discrimination of tyrosine (Tyr) enantiomers on (−)‐(18‐crown‐6)‐2,3,11,12‐tetracarboxylic acid [(−)‐18‐C‐6‐TA] as crown‐ether type chiralselector (CS) by nuclear magnetic resonance (NMR) spectroscopy and docking simulations. In this study, successful discrimination of the enantiomers of Tyr