Abstract
Powder and fiber diffraction patterns were calculated for model cellulose crystallites with chains 20 glucose units long. Model sizes ranged from four chains to 169 chains, based on cellulose Iβ coordinates. They were subjected to various combinations of energy minimization and molecular dynamics (MD) in water. Disorder induced by MD and one or two layers of water had small effects on the relative intensities, except that together they reduced the low-angle scattering that was otherwise severe enough to shift the 1 \( \bar {1} \) 0 peak. Other shifts in the calculated peaks occurred because the empirical force field used for MD and minimization caused the models to have small discrepancies with the experimental intermolecular distances. Twisting and other disorder induced by minimization or MD increased the breadth of peaks by about 0.2–0.3° 2-θ. Patterns were compared with experimental results. In particular, the calculated fiber patterns revealed a potential for a larger number of experimental diffraction spots to be found for cellulose from some higher plants when crystallites are well-oriented. Either that, or further understanding of those structures is needed. One major use for patterns calculated from models is testing of various proposals for microfibril organization.
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Notes
In a crystal composed of a 10 × 10 array of polymeric molecules, 36 would be on the surface (36%). In a conventional, sub-millimeter size single-crystal for diffraction, the fraction of molecules on the surface is much less than one percent.
The range of the calculated diffraction was selected after consideration of the number of atoms in the model and the number of pixels for which the intensity must be calculated. These factors determine the computer time required for the calculation. Some of the software used for projects other than reported in this paper was limited in the sizes of data arrays that could be handled. Considering that some models were as large as 94,700 atoms and 18 different size crystals were modeled, each with 14 variations of water content, energy minimization and molecular dynamics, the selected step sizes of 0.003 S out to 0.597 S were considered adequate for the present purposes. Larger calculated patterns are definitely possible.
References
Alexander LE (1969) X-ray diffraction methods in polymer science. Wiley-Interscience, New York, p. 44 and Appendix 1, T-14
Azároff LV, Buerger MJ (1958) The powder method in X-ray crystallography. McGraw-Hill, New York, p 254
Baker AA, Helbert W, Sugiyama J, Miles MJ (2000) New insight into cellulose structure by atomic force microscopy shows the Iα crystal phase at near-atomic resolution. Biophys J 79:1139–1145
Basma M, Sundara S, Calgan D, Vernali T, Woods RJ (2001) Solvated ensemble averaging in the calculation of partial atomic charges. J Comput Chem 22:1125–1137
Bellesia G, Asztalos A, Shen T, Langan P, Redondo A, Gnanakaran S (2010) In silico studies of crystalline cellulose and its degradation by enzymes. Acta Crystallogr D Biol Crystallogr 66:1184–1188
Bergenstråhle M, Berglund LA, Mazeau K (2007) Thermal response in crystalline Iβ cellulose: a molecular dynamics study. J Phys Chem B 111:9138–9145
Ding S-Y, Himmel ME (2006) The maize primary cell wall microfibril: a new model derived from direct visualization. J Agric Food Chem 54:597–606
Driemeier C, Calligaris GA (2011) Theoretical and experimental developments for accurate determination of crystallinity of cellulose I materials. J Appl Cryst 44:184–192
Elazzouzi-Hafraoui S, Nishiyama Y, Putaux JL, Heux L, Dubreuil F, Rochas C (2008) The shape and size distribution of crystalline nanoparticles prepared by acid hydrolysis of native cellulose. Biomacromolecules 9:57–65
Fernandes AN, Thomas LH, Altaner CM, Callow P, Fosyth VT, Apperley DC, Kennedy CJ, Jarvis MC (2011) Nanostructure of cellulose microfibrils in spruce wood. Proc Natl Acad Sci USA 108:E1195–E1203
Ford ZM, Stevens ED, Johnson GP, French AD (2005) Determining the crystal structure of cellulose IIII by modeling. Carbohydr Res 340:827–833
Galassi M, Davies J, Theiler J, Gough B, Jungman G, Alken P, Booth M, Rossi F (2009) GNU scientific library. Network Theory Ltd., United Kingdom or see http://www.gnu.org/s/gsl/
Hardy BJ, Sarko A (1996) Molecular dynamics simulations and diffraction-based analysis of the native cellulose fibre: structural modelling of the I-α and I-β phases and their interconversion. Polymer 37:1833–1839
Heiner AP, Sugiyama J, Teleman O (1995) Crystalline cellulose Iα and Iβ studied by molecular dynamics simulation. Carbohyr Res 273:207–223
Hosemann R (1962) Crystallinity in high polymers, especially fibres. Polymer 3:349–392
Jorgensen WL, Chandrasekhar J, Madura JD, Impey RW, Klein ML (1983) Comparison of simple potential functions for simulating liquid water. J Chem Phys 79:926–935
Kirschner KN, Woods RJ (2001a) Solvent interactions determine carbohydrate conformations. Proc Natl Acad Sci USA 98:10541–10545
Kirschner KN, Woods RJ (2001b) Quantum mechanical study of the nonbonded forces in water-methanol complexes. J Phys Chem A 105:4150–4155
Kirschner KN, Yongye AB, Tschampel SM, González-Outeiriño J, Daniels CR, Foley BL, Woods RJ (2008) GLYCAM06: a generalizable biomolecular force field, carbohydrates. J Comput Chem 29:622–655
Kroon-Batenburg LMJ, Kroon J (1997) The crystal and molecular structures of cellulose I and II. Glycoconj J 14:677–690
Langan P, Nishiyama Y, Chanzy H (2001) X-ray structure of mercerized cellulose II at 1 Ångstrom resolution. Biomacromolecules 2:410–416
Macrae CF, Gruno IJ, Chisholm JA, Edgington PR, McCabe P, Pidcock E, Rodriguez-Monge L, Taylor R, van de Streek J, Wood PA (2008) Mercury CSD 2.0—new features for the visualization and investigation of crystal structures. J Appl Crystallogr 41:466–470
Matthews JF, Skopec CE, Mason PE, Zuccato P, Torget RW, Sugiyama J, Himmel ME, Brady JW (2006) Computer simulation studies of microcrystalline cellulose Iβ. Carbohydr Res 341:138–152
Mazeau K, Heux L (2003) Molecular dynamics simulations of bulk native crystalline and amorphous structures of cellulose. J Phys Chem B 107:2394–2403
Newman RH (1998) Evidence for assignment of 13C NMR signals to cellulose crystallite surfaces in wood, pulp and isolated celluloses. Holzforschung 52:157–159
Newman RH (2008) Simulation of X-ray diffractograms relevant to the purported polymorphs cellulose IVI and IVII. Cellulose 15:769–778
Nishiyama Y (2009) Structure and properties of the cellulose microfibril. J Wood Sci 55:241–249
Nishiyama Y, Langan P, Chanzy H (2002) Crystal structure and hydrogen-bonding system in cellulose Iβ from synchrotron X-ray and neutron fiber diffraction. J Am Chem Soc 124:9074–9082
Nishiyama Y, Sugiyama J, Chanzy H, Langan P (2003a) Crystal structure and hydrogen bonding system in cellulose Iα, from synchrotron X-ray and neutron fiber diffraction. J Am Chem Soc 125:14300–14306
Nishiyama Y, Kim UJ, Kim DY, Katsumata KS, May RP, Langan P (2003b) Periodic disorder along ramie cellulose microfibrils. Biomacromolecules 4:1013–1017
Nishiyama Y, Johnson GP, French AD, Forsyth VT, Langan P (2008) Neutron crystallography, molecular dynamics, and quantum mechanics studies of the nature of hydrogen bonding in cellulose Iβ. Biomacromolecules 9:3133–3140
Nishiyama Y, Noishiki Y, Wada M (2011) X-ray structure of anhydrous β-chitin at 1 Å resolution. Macromolecules 44:950–957
Patterson A (1939) The Scherrer formula for X-ray particle size determination. Phys Rev 56:978–982
Pettersen EF, Goddard TD, Huang CC, Couch GS, Greenblatt DM, Meng EC, Ferrin TE (2004) UCSF Chimera—A visualization system for exploratory research and analysis. J Comput Chem 25:1605–1612
Rasband WS (2011) ImageJ. U. S. National Institutes of Health, Bethesda, Maryland, USA. http://imagej.nih.gov/ij/
Rowland SP, Roberts EJ, Bose JL (1971) Availability and state of order of hydroxyl groups on the surfaces of microstructural units of crystalline cotton cellulose. J Polym Sci A-1 9:1431–1440
Spek AL (2008) PLATON, a multipurpose crystallographic tool. Utrecht University, Utrecht, The Netherlands. http://www.cryst.chem.uu.nl/platon/pl000000.html
Wada M, Okano T, Sugiyama J (1997) Synchrotron-radiated X-ray and neutron diffraction study of native cellulose. Cellulose 4:221–232
Wada M, Chanzy H, Nishiyama Y, Langan P (2004) Cellulose IIII crystal structure and hydrogen bonding by synchrotron X-ray and neutron fiber diffraction. Macromolecules 37:8548–8555
Wada M, Heux L, Nishiyama Y, Langan P (2009) X-ray crystallographic, scanning microprobe X-ray diffraction, and cross-polarized/magic angle spinning 13C NMR studies of the structure of cellulose IIIII. Biomacromolecules 10:302–309
Wojdyr M (2011) http://www.unipress.waw.pl/debyer and http://code.google.com/p/debyer/wiki/debyer
Yui T, Okayama N, Hayashi S (2010) Structure conversions of cellulose IIII crystal models in solution state: a molecular dynamics study. Cellulose 17:679–691
Acknowledgments
We thank Paul Langan and Henri Chanzy for helpful comments on a draft of this paper. Jodi Hadden contributed thoughts on twisted crystals.
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Nishiyama, Y., Johnson, G.P. & French, A.D. Diffraction from nonperiodic models of cellulose crystals. Cellulose 19, 319–336 (2012). https://doi.org/10.1007/s10570-012-9652-1
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DOI: https://doi.org/10.1007/s10570-012-9652-1