Yuan E.C.-YHuang S.-JHuang H.-CSinkkonen JOss AOrg M.-LSamoson AHWAN-CHING TAICHUN-CHUNG CHAN2021-08-032021-08-03202113597345https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105011150&doi=10.1039%2fd1cc01149a&partnerID=40&md5=65a0f2e55c6cc4a89d97706cd8d472e8https://scholars.lib.ntu.edu.tw/handle/123456789/575717We present a first report on the detection of three different C6 conformers of cellulose in spruce, as revealed by solid-state 1H-13C correlation spectra. The breakthrough in 1H resolution is achieved by magic-angle spinning in the regime of 150 kHz. The suppression of dense dipolar network of 1H provides inverse detected 13C spectra at a good sensitivity even in natural samples. We find that the glycosidic linkages are initially more ordered in spruce than maple, but a thermal treatment of spruce leads to a more heterogeneous packing order of the remaining cellulose fibrils. This journal is ? The Royal Society of Chemistry.Cellulose; Cellulose fibrils; Correlation spectra; Glycosidic linkages; Packing order; Magic angle spinning; Cellulose; Detection; Fibrils; Packing; Picea; Resolution; Spectra; Spinning[SDGs]SDG3journal article10.1039/d1cc01149a339084962-s2.0-85105011150