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虫海小卒

银虫 (正式写手)

[求助] 还原型谷胱甘肽氧化问题咨询

各位老师:
        最近想用环氧基改性后的琼脂糖微球偶联还原型谷胱甘肽,其中有个问题想求助各位老师,就是还原型谷胱甘肽容易被氧化,那么我在pH9~11的溶液中(未除氧)与环氧基改性的琼脂糖反应,一是此条件下还原型谷胱甘肽容易被氧化吗?二是如果容易被氧化,如何避免呢?三是环氧基与巯基反应快吗?急需各位解答,不胜感激!

[ 来自小组 微球纳米球 ]

[ Last edited by 虫海小卒 on 2013-10-24 at 10:19 ]
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virty76

铁杆木虫 (著名写手)

【答案】应助回帖

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感谢参与,应助指数 +1
虫海小卒: 金币+15, ★有帮助, 3 2013-10-29 10:25:16
环氧基团在碱性下,不稳定易自开环,
它与羟基能结合,应该与巯基反应较快,一般一小时即可
2楼2013-10-25 09:32:18
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aircraftvip

专家顾问 (正式写手)

【答案】应助回帖

感谢参与,应助指数 +1
1. -SH is less prone to oxidation in acidic conditions.
2. either decrease pH or purge with argon

One relevant paper including certain kinetics data:
Thiol–epoxy/thiol–acrylate hybrid materials synthesized by photopolymerization
J. Mater. Chem. C, 2013,1, 4481-4489
DOI: 10.1039/C3TC30360H
http://pubs.rsc.org/en/content/a ... 30360h#!divAbstract
格物致知,知行合一
3楼2013-10-27 01:42:16
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虫海小卒

银虫 (正式写手)

引用回帖:
3楼: Originally posted by aircraftvip at 2013-10-27 01:42:16
1. -SH is less prone to oxidation in acidic conditions.
2. either decrease pH or purge with argon

One relevant paper including certain kinetics data:
Thiol–epoxy/thiol–acrylate hybrid materia ...

非常感谢您耐心的解答,谢谢!
真心,坦诚=朋友
4楼2013-10-29 10:25:47
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