J. Phys. Chem. B 2001, 105, 8077-8080
8077
Crystal Orientation of N,N′-Dicyclohexyl-2,6-naphthalenedicarboxamide in High Magnetic Field Takahiko Kawai,† Ryota Iijima,† Yuzo Yamamoto,‡ and Tsunehisa Kimura*,† Department of Applied Chemistry, Tokyo Metropolitan UniVersity, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan, and Department of Biological and Chemical Engineering, Gunma UniVersity, 1-5-1 Tenjincho, Kiryu, Gunma 376-8515, Japan ReceiVed: December 31, 2000; In Final Form: June 21, 2001
The magnetic alignment of a crystalline powder of N,N′-dicyclohexyl-2,6-naphthalenedicarboxamide is reported. The powder is suspended in an epoxy precursor and aligned in the magnet (6 T). Then the precursor is solidified in the magnet to fix the crystal alignment. Wide-angle X-ray analysis of the aligned crystal and the consideration of the crystal symmetry enable the determination of the direction of three principal axes of diamagnetic susceptibility tensor of the crystal with respect to the crystallographic axes. It is found that the b axis, the [104] direction, and the axis normal to these two axes correspond to the magnetic axes of χ3, χ2, and χ1, respectively. Analysis of the diamagnetic anisotropy of the molecule and the molecular packing in the crystal indicates that χ1< χ3< χ2 (
