NMR characterization of sodium carboxymethyl cellulose: Substituent distribution and mole fraction of monomers in the polymer chains
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- 作者：Hiroyuki Konoa ; kono@sem.tomakomai-ct.ac.jp" class="auth_mail" title="E-mail the corresponding author ; Kazuhiro Oshimaa ; Hisaho Hashimotoa ; Yuuichi Shimizua ; Kenji Tajimab
- 关键词：13C ; carbon-13 ; 1D ; one-dimensional ; 1H ; proton ; 2D ; two-dimensional ; AGU ; anhydroglucose unit ; BBO ; broadband observe ; CM ; carboxymethyl ; CMC ; sodium carboxymethyl cellulose ; COSY ; correlation spectroscopy ; D2O ; deuterium oxide ; DS ; degree of substitution ; DSS ; 4 ; 4-dimethyl-4-silapentane-1-sulfonic acid ; HSQC ; heteronuclear single quantum coherence ; Mw ; molecular weight ; NMR ; nuclear magnetic resonance ; TOCSY ; total correlation spectroscopy
- 刊名：Carbohydrate Polymers
- 出版年：2016
- 出版时间：1 August 2016
- 年：2016
- 卷：146
- 期：Complete
- 页码：1-9
- 全文大小：1716 K
文摘
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A carboxymethyl cellulose series with substituent degrees of 0.68–2.84 was prepared.
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The chemical shifts of the ring protons and carbons were precisely assigned by NMR.
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The 2-, 3-, or 6-position substituent effects on the chemical shifts were estimated.
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The effects explained the chemical shifts of di- and tricarboxymethylated cellulose.
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The monomers comprising carboxymethyl cellulose could be estimated by 13C NMR.