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Issue 4, 2016
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Crystal structure of disordered nanocrystalline αII-quinacridone determined by electron diffraction

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Abstract

The nanocrystalline αII-phase of the industrially produced organic pigment quinacridone was studied by 3D electron diffraction of its crystals with a thickness of only 10 nm. The diffraction data showed strong diffuse scattering along one direction indicating severe stacking disorder. The average crystal structure was obtained from electron diffraction data using direct methods. In αII-quinacridone, the molecules are connected by a pair of hydrogen bonds thereby forming molecular chains, which are stacked, resulting in the formation of layers. The layers exhibit a stacking disorder with a mixture of herringbone and parallel arrangements, which explains the diffuse scattering. The crystal structure was confirmed by dispersion-corrected DFT calculations.

Graphical abstract: Crystal structure of disordered nanocrystalline αII-quinacridone determined by electron diffraction

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Supplementary files

Article information


Submitted
18 Sep 2015
Accepted
09 Nov 2015
First published
13 Nov 2015

This article is Open Access

CrystEngComm, 2016,18, 529-535
Article type
Paper
Author version available

Crystal structure of disordered nanocrystalline αII-quinacridone determined by electron diffraction

T. E. Gorelik, C. Czech, S. M. Hammer and M. U. Schmidt, CrystEngComm, 2016, 18, 529
DOI: 10.1039/C5CE01855B

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