Novel insight into cellulose supramolecular structure through 13C CP-MAS NMR spectroscopy and paramagnetic relaxation enhancement

被引：52

作者：

Zuckerstatter, Gerhard ^{[1
]}

Terinte, Nicoleta ^{[2
]}

Sixta, Herbert ^{[3
]}

Schuster, Kurt Christian ^{[2
]}

机构：

[1] Kompetenzzentrum Holz GmbH, A-4021 Linz, Austria

[2] Lenzing AG, A-4860 Lenzing, Austria

[3] Aalto Univ, Espoo 02015, Finland

来源：

CARBOHYDRATE POLYMERS | 2013年 / 93卷 / 01期

关键词：

Cellulose I; Cellulose II; C-13 CP-MAS NMR; Paramagnetic relaxation enhancement; Spectral fitting; Lateral crystallite dimensions; SOLID-STATE NMR; FIBRIL AGGREGATION; FIBERS; ASSIGNMENT; LYOCELL; PULPS;

D O I：

10.1016/j.carbpol.2012.05.019

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

C-13 CP-MAS NMR and paramagnetic relaxation enhancement provide novel insight into the supramolecular structure of solid cellulose I and II. Separable NMR signals associated with crystalline interiors, solvent accessible and inaccessible surfaces, as well as non-crystalline material are assigned and confirmed. For the first time solvent accessibility is evidenced and monitored through C-13 T-1 NMR relaxation enhancement in paramagnetic medium. Established NMR signal assignments for cellulose I have been confirmed. Existing cellulose II resonance attributions have been modified and extended. Novel spectral fitting routines for cellulose II allow for the reproducible quantification of separable signal contributions. Results from NMR line shape analyses are straightforwardly introduced into a model for cellulose II supramolecular structure. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：122 / 128

页数：7

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