Selective Detection of Crystalline Cellulose in Plant Cell Walls with Sum-Frequency-Generation (SFG) Vibration Spectroscopy
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- 作者：Anna L. Barnette ; Laura C. Bradley ; Brandon D. Veres ; Edward P. Schreiner ; Yong Bum Park ; Junyeong Park ; Sunkyu Park ; Seong H. Kim
- 刊名：Biomacromolecules
- 出版年：2011
- 出版时间：July 11, 2011
- 年：2011
- 卷：12
- 期：7
- 页码：2434-2439
- 全文大小：909K
- 年卷期：v.12,no.7(July 11, 2011)
- ISSN：1526-4602
文摘
The selective detection of crystalline cellulose in biomass was demonstrated with sum-frequency-generation (SFG) vibration spectroscopy. SFG is a second-order nonlinear optical response from a system where the optical centrosymmetry is broken. In secondary plant cell walls that contain mostly cellulose, hemicellulose, and lignin with varying concentrations, only certain vibration modes in the crystalline cellulose structure can meet the noninversion symmetry requirements. Thus, SFG can be used to detect and analyze crystalline cellulose selectively in lignocellulosic biomass without extraction of noncellulosic species from biomass or deconvolution of amorphous spectra. The selective detection of crystalline cellulose in lignocellulosic biomass is not readily achievable with other techniques such as XRD, solid-state NMR, IR, and Raman analyses. Therefore, the SFG analysis presents a unique opportunity to reveal the cellulose crystalline structure in lignocellulosic biomass.