Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA.
Ultramicroscopy. 2011 Jun;111(7):812-6. doi: 10.1016/j.ultramic.2010.09.004. Epub 2010 Sep 17.
The structure of an organic dye 1,5-diaminoanthraquinone (DAAQ) nanowire was studied by both electron diffraction and X-ray powder diffraction. The unit cell of the crystal was determined from a series of tilted selected area electron diffraction patterns (monoclinic: a=3.78 Å, b=9.73 Å, c=15.01 Å and β=82.4 °). By using precession electron diffraction, the following extinction conditions were determined, 0k0: k=2n and 00l: l=2n, which give the space group as P2₁/C (no. 14). The powder charge flipping algorithm was applied to resolve the phase problem and the structural model of the DAAQ crystal was built.
通过电子衍射和 X 射线粉末衍射研究了有机染料 1,5-二氨基蒽醌（DAAQ）纳米线的结构。通过一系列倾斜选区电子衍射图谱确定了晶体的晶胞参数（单斜晶系：a=3.78 Å，b=9.73 Å，c=15.01 Å，β=82.4°）。利用进动电子衍射，确定了以下消光条件：0k0：k=2n 和 00l：l=2n，这给出了空间群为 P2₁/C（No.14）。应用粉末电荷翻转算法解决相位问题，并建立了 DAAQ 晶体的结构模型。
