Abstract
The influence of the hydrocarbon chain length in the formation of interdigitated and non-interdigitated bilayers in n -alkylammonium chlorides has been investigated for chain lengths varying between 8 and 14 carbon atoms. The formation of non-interdigitated bilayers during crystallization from solution is favoured for shorter chains whilst the interdigitated structure is predominant for larger chains. The thermodynamic parameters of the solid to solid phase transitions in the non-interdigitated samples depend on chain length showing the odd-even alternation that characterized homologous series in n -paraffins. The solid to liquid crystal phase transition temperatures and enthalpies show a linear dependence with the chain length.
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References
A. S. Kertes, H. Gutmann and I. Mayer, J. Appl. Cryst., 4 (1971) 93.
J. Tsau and D. F. R. Gilson, Can. J. Chem., 52 (1974) 2421.
J. K. Schenk, G. Chapuis, R. Kind, R. Blinc and J. Selinger, J. Molec. Struct., 176 (1988) 331.
E. C. Reynhardt, Chem. Phys. Letters, 256 (1996) 548.
E. C. Reynhardt, S. Jurga and K. Jurga, Mol. Phys., 77 (1992) 257.
J. D. Gault, H. A. Gallardo and H. J. Müller, Mol. Cryst. Liq. Cryst., 130 (1985) 163.
E. Lopez Cabarcos and P. A. Galera Gomez, Il Nuovo Cimento, 16D (1994) 1515.
E. Sackmann, Ber. Bunsenges. Phys. Chem., 82 (1978) 891.
R. Kind, R. Blinc, H. Arend, P. Muralt, J. Slak, G. Chapuis and J. K. Schenk, Phys. Rev. A, 26 (1982) 1816.
J. Tsau and D. F. R. Gilson, J. Phys. Chem., 72 (1972) 4082.
J. Tsau and D. F. R. Gilson, Can. J. Chem., 51 (1973) 1990.
C. Tanford, J. Phys. Chem., 78 (1974) 2469.
G. W. Gray, 'Advances in Liquid Crystals', Ed. G. H. Brown, Academic Press, New York 1976, Vol. 2, p. 1.
S. Chandraseckhar, 'Liquid Crystals', Cambridge University Press, Cambridge, London 1980.
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Terreros, A., Galera-Gómez, P.A. & Lopez-Cabarcos, E. DSC and X-ray Diffraction Study of Polymorphism in n-Alkylammonium Chlorides. Journal of Thermal Analysis and Calorimetry 61, 341–350 (2000). https://doi.org/10.1023/A:1010196829323
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DOI: https://doi.org/10.1023/A:1010196829323