کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1199380 1493567 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparison of covalent and non-covalent imprinting strategies for the synthesis of stigmasterol imprinted polymers
ترجمه فارسی عنوان
مقایسه استراتژی های کوانتالی و غیر کووالانتی برای سنتز پلیمرهای حاوی عصاره گیاه دارویی
کلمات کلیدی
پلیمرهای مونومر شده اعتیاد کوانتومی و غیرقابل انعطاف، استخراج فاز جامد، استگماتستر، فیتوسترولها
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Non-covalent and covalent stigmasterol imprinting strategies were compared.
• The covalent approach utilized the cleavable template stigmasteryl-3-O-methacrylate.
• Selective recognition of stigmasterol was enhanced under aqueous-organic conditions.
• Cross-reactivity studies showed good selectivity for a range of synthetic analogues.
• Rapid MISPE demonstrated preferential retention of stigmasterol over other sterols.

Non-covalent and covalent imprinting strategies have been investigated for the synthesis of stigmasterol imprinted polymers. The synthesized molecularly imprinted polymers (MIPs) were then evaluated for their recognition and selectivity towards stigmasterol via static and dynamic batch-binding assays and their performance measured against control non-imprinted polymers (NIPs). MIPs prepared using the conventional non-covalent imprinting method displayed little to no binding affinity for stigmasterol under various conditions. In contrast, the application of a covalent imprinting approach using the novel post-synthetically cleavable monomer-template composite stigmasteryl-3-O-methacrylate resulted in the fabrication of a MIP that successfully recognized stigmasterol in both organic and partially aqueous environments. The affinity and selectivity of the covalently prepared MIP was enhanced when undertaken in a partially aqueous environment consisting of an acetonitrile/water (9:1, v/v) solvent mixture. These features have been exploited in a molecularly imprinted solid-phase extraction (MISPE) format, wherein the preferential retention of stigmasterol (with an imprint factor of 12) was demonstrated with 99% recovery in comparison to cholesterol (imprint factor of 6) and ergosterol (imprint factor of 4) while in the presence of several closely related steryl analogues.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1359, 12 September 2014, Pages 35–43
نویسندگان
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