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Issue 14, 2017
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Solution of an elusive pigment crystal structure from a thin film: a combined X-ray diffraction and computational study

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Abstract

Epindolidione, a hydrogen-bonded derivative of the organic semiconductor tetracene, is an organic pigment which has previously been used to produce stable OFETs with relatively high hole mobilities. Despite its use as an inkjet pigment and organic semiconductor, the crystal structure of epindolidione has proved elusive and is currently unknown. In this work, we report a crystal structure solution of epindolidione determined from vapor deposited thin films using a combined experimental and theoretical approach. The structure is found to be similar to one of the previously reported epindolidione derivatives and is most likely a surface-mediated polymorph, with a slightly different crystal packing compared to the bulk powder. The effect of substrate temperature on film morphology and structure is also investigated, where it is found that the crystallite orientation can be tuned by deposition at different substrate temperatures. The results also illustrate the possibilities for crystal structures to be solved from thin films.

Graphical abstract: Solution of an elusive pigment crystal structure from a thin film: a combined X-ray diffraction and computational study

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Supplementary files

Article information


Submitted
01 Feb 2017
Accepted
10 Mar 2017
First published
14 Mar 2017

This article is Open Access

CrystEngComm, 2017,19, 1902-1911
Article type
Paper

Solution of an elusive pigment crystal structure from a thin film: a combined X-ray diffraction and computational study

A. O. F. Jones, C. Röthel, R. Lassnig, O. N. Bedoya-Martínez, P. Christian, I. Salzmann, B. Kunert, A. Winkler and R. Resel, CrystEngComm, 2017, 19, 1902
DOI: 10.1039/C7CE00227K

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