کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1199163 1493563 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Octaproline, a conformationally flexible chiral selector in liquid chromatographic enantioseparation
ترجمه فارسی عنوان
اکتاپرولین، یک انتخاب کننده انعطاف پذیر کوانتومی انحصاری انتی سویه کروماتوگرافی مایع
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Enantiorecognition in oligoproline CSPs depends on chiral selector conformation.
• Mobile phase composition determines reversible conformational changes on oligoproline.
• Hydrogen bonding is fundamental in enantiorecognition by oligoproline-derived CSPs.
• Protic solvents promote enantioselective rigid ordered oligoproline structure.

A proline octapeptide-derived chiral selector (CS) end-capped using a pivaloyl group was covalently linked to a silica gel chromatographic matrix by the C-terminal group. The chromatographic behaviour of the resulting chiral stationary phase (CSP) using different conditions was compared to those containing 3,5-dimethylphenylcarbamate residues on the proline units. An enantioseparation ability highly dependent on the mobile phase used is observed for these CSPs. When mixtures of alkane/alcohol or alkane/ether are used as mobile phase a similar enantioselectivity is obtained. Nevertheless, in the presence of chlorinated solvents, and without a hydrogen bonding donor in the mobile phase, enantioselectivity is extremely reduced. The reversibility of this phenomenon, attributed to a conformational change in the CS, is examined.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1363, 10 October 2014, Pages 109–118
نویسندگان
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