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mPEG-EPO共聚AzPheEO制備及結構表征
發布時間:2025-07-16     作者:kx   分享到:

文獻:聚乙二醇接枝光反應性聚乙二醇的合成與表征及其在防生物污損應用方面的研究

鏈接:https://www.mdpi.com/2073-4360/15/1/184

作者:馬哈茂德·H·奧斯曼1,2奧西德,伊藤義弘1,2,3,*奧西德和秋元準

節選:

EO、AzPheEO和mPEG-EPO的共聚

首先,將環氧乙烷 (EO) 與 AzPheEO 和 mPEG-EPO 共聚(方案 1)。為此,將 TBAB、AzPheEO 和 mPEG-EPO 在真空下干燥 2 小時,然后暴露于干燥氮氣中。將甲苯加入燒瓶中以溶解 mPEG-EPO。隨后,將 EO 溶液和 i-Bu 3 Al 加入置于冰浴中的燒瓶中。將溶液在 25 °C 下避光攪拌共聚 18 小時。將甲醇加入溶液中,減壓除去溶劑。將粗化合物溶解于丙酮中,并將溶液用水透析三天。然后將所得聚合物冷凍干燥,稱為 AzPEGx [y],其中 x 和 y 分別代表 Mn 和 mPEG-EO 的投料比。所得 AzPEGx [y] 聚合物采用1 H-核磁共振 (NMR) 光譜法 (JNM-ECZ400R, 400 MHz, JEOL, 日本東京) 在氯仿中進行表征,以及采用凝膠滲透色譜法 (GPC; JASCO, 日本東京) 進行表征。該系統配備一臺折射率檢測器 (RI-2032, JASCO, 日本東京) 和兩根色譜柱 (SB-803 HQ 和 SB804 HQ; Showa Denko, 日本東京),在含有 10 mM 溴化鋰的二甲基甲酰胺 (DMF) 中進行分析。

mPEG-EPO

 Copolymerization of EO, AzPheEO, and mPEG-EPO

First, EO was copolymerized with AzPheEO and mPEG-EPO (Scheme 1). For this, TBAB, AzPheEO, and mPEG-EPO were dried under vacuum for 2 h, after which they were exposed to dry nitrogen. Toluene was added to the flask to dissolve mPEG-EPO. Subsequently, the EO solution and i-Bu3Al were added to the flask in an ice bath. The solution was stirred for copolymerization at 25 °C in the dark for 18 h. Methanol was added to the solution, and the solvent was removed under reduced pressure. The crude compound was dissolved in acetone, and the solution was dialyzed against water for three days. The resulting polymer was then freeze-dried and is referred to as AzPEGx [y], where x and y represent the Mn and feed ratio of mPEG-EO, respectively. The obtained AzPEGx [y] polymer was characterized via 1H-nuclear magnetic resonance (NMR) spectroscopy (JNM-ECZ400R, 400 MHz, JEOL, Tokyo, Japan) in chloroform, as well as via gel permeation chromatography (GPC; JASCO, Tokyo, Japan). The system was equipped with a refractive index detector (RI-2032, JASCO, Tokyo, Japan) and two columns (SB-803 HQ and SB804 HQ; Showa Denko, Tokyo, Japan) in dimethylformamide (DMF) containing 10 mM lithium bromide.

西安齊岳生物提供相關產品:

DOPC

DSPE-PEG-Mannose

DSPE-PEG-Rhodamine

DOPE-PEG-SC

DSPE(Sodium salt)-PEG-COOH

DOPE-PEG-Mal

DSPE-PEG-多肽(各種定制)

DSPE-PEG-Ce6

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