MAGNETIC-FIELD INDUCED ORIENTATION AND ANISOTROPIC SUSCEPTIBILITY OF NORMAL ALKANES

作者: Henry H. Shao , Hu Gang , E. B. Sirota

DOI: 10.1103/PHYSREVE.57.R6265

关键词:

摘要: Nonfunctionalized n-alkanes, a basic organic building block, are not commonly associated with magnetic behavior. To quantify field effects on wax crystals, synchrotron x-ray scattering was used to measure the angular distribution arising from competition between Brownian rotation and energy in dispersion of uniform-sized n-alkane single crystals. Dramatic alignment both axes occurred preference carbon-backbone plane be {perpendicular} {rvec H}. Diamagnetic anisotropies were obtained by quantitative analysis orientational distribution. {copyright} {ital 1998} The American Physical Society}

参考文章(27)
An X-Ray Investigation of Normal Paraffins Near Their Melting Points Proceedings of The Royal Society A: Mathematical, Physical and Engineering Sciences. ,vol. 138, pp. 514- 530 ,(1932) , 10.1098/RSPA.1932.0200
A. A. Schaerer, C. J. Busso, A. E. Smith, L. B. Skinner, Properties of Pure Normal Alkanes in the C17 to C36 Range Journal of the American Chemical Society. ,vol. 77, pp. 2017- 2019 ,(1955) , 10.1021/JA01612A097
C. W. Bunn, The crystal structure of long-chain normal paraffin hydrocarbons. The “shape” of the <CH2 group Transactions of The Faraday Society. ,vol. 35, pp. 482- 491 ,(1939) , 10.1039/TF9393500482
David Turnbull, Robert L. Cormia, Kinetics of Crystal Nucleation in Some Normal Alkane Liquids The Journal of Chemical Physics. ,vol. 34, pp. 820- 831 ,(1961) , 10.1063/1.1731681
Bernd Ewen, Gert R. Strobl, Dieter Richter, Phase transitions in crystals of chain molecules. Relation between defect structures and molecular motion in the four modifications of n-C33H68 Faraday Discussions of the Chemical Society. ,vol. 69, pp. 19- 31 ,(1980) , 10.1039/DC9806900019
J. Doucet, I. Denicolo, A. Craievich, X‐ray study of the ‘‘rotator’’ phase of the odd‐numbered paraffins C17H36, C19H40, and C21H44 Journal of Chemical Physics. ,vol. 75, pp. 1523- 1529 ,(1981) , 10.1063/1.442185
Goran Ungar, Structure of rotator phases in n-alkanes The Journal of Physical Chemistry. ,vol. 87, pp. 689- 695 ,(1983) , 10.1021/J100227A032
R. G. SNYDER, M. MARONCELLI, S. P. QI, H. L. STRAUSS, Phase Transitions and Nonplanar Conformers in Crystalline n-Alkanes. Science. ,vol. 214, pp. 188- 190 ,(1981) , 10.1126/SCIENCE.214.4517.188
R. G. Snyder, G. Conti, H. L. Strauss, D. L. Dorset, Thermally induced mixing in partially microphase segregated binary n-alkane crystals The Journal of Physical Chemistry. ,vol. 97, pp. 7342- 7350 ,(1993) , 10.1021/J100130A037
E. B. Sirota, H. E. Jr. King, Henry H. Shao, D. M. Singer, Rotator Phases in Mixtures of n-Alkanes The Journal of Physical Chemistry. ,vol. 99, pp. 798- 804 ,(1995) , 10.1021/J100002A050