We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Vibrational spectral signatures of crystalline cellulose using high resolution broadband sum frequency generation vibrational spectroscopy (HR-BB-SFG-VS).
- Authors
Zhang, Libing; Lu, Zhou; Velarde, Luis; Fu, Li; Pu, Yunqiao; Ding, Shi-You; Ragauskas, Arthur; Wang, Hong-Fei; Yang, Bin
- Abstract
Both the C-H and O-H region spectra of crystalline cellulose were studied using the sub-wavenumber high-resolution broadband sum frequency generation vibrational spectroscopy (HR-BB-SFG-VS) for the first time. The resolution of HR-BB-SFG-VS is about 10-times better than conventional scanning SFG-VS and has the capability of measuring the intrinsic spectral lineshape and revealing many more spectral details. With HR-BB-SFG-VS, we found that in cellulose samples from different sources, including Avicel and cellulose crystals isolated from algae Valonia (Iα) and tunicates (Iβ), the spectral signatures in the O-H region were unique for the two allomorphs, i.e. Iα and Iβ, while the spectral signatures in the C-H regions varied in all samples examined. Even though the origin of the different spectral signatures of the crystalline cellulose in the O-H and C-H vibrational frequency regions are yet to be correlated to the structure of cellulose, these results lead to new spectroscopic methods and opportunities to classify and to understand the basic crystalline structures, as well as variations in polymorphism of the crystalline cellulose.
- Subjects
CELLULOSE nanocrystals; VIBRATIONAL spectra; FREQUENCY synthesizers; HIGH resolution spectroscopy; CRYSTAL structure; VALONIA (Algae)
- Publication
Cellulose, 2015, Vol 22, Issue 3, p1469
- ISSN
0969-0239
- Publication type
Article
- DOI
10.1007/s10570-015-0588-0