Studies of crystalline native celluloses using potential energy calculations Research Papers DOI:
Cite this article as: Aabloo, A., French, A.D., Mikelsaar, RH. et al. Cellulose (1994) 1: 161. doi:10.1007/BF00819665 Abstract
Energies for various trial packing arrangements of unit cells for the I
α and I β phases of native cellulose discovered by Sugiyama et al. were evaluated. Both a rigid-ring method, PLMR, and the full-optimization, molecular mechanics program, MM3(90), were used. For both phases the models that had the lowest PLMR energy also had the lowest MM3 energy. Both calculated models have the chains packed ‘up’, O6s in tg positions, and the same sheets of hydrogen-bonded chains. The I β structure model is essentially identical to that proposed previously for ramie cellulose by Woodcock and Sarko. It is also the same as the best parallel model previously proposed that was based on the X-ray data of Mann, Gonzalez and Wellard, once the various unit cell conventions are considered. Also, the energies from both methods for all three celluloses, I α, I β and II, are in the order that rationalizes their relative stabilites. Keywords cellulose I molecular mechanics crystal structure molecular modelling References
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