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Issue 11, 2009
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Trimorphism of a model carcinogen 4-nitroquinoline-N-oxide

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Abstract

Three polymorphs of a model carcinogen 4-nitroquinoline-N-oxide were crystallized from its solutions in various organic solvents using either (i) slow cooling or evaporation (form I), (ii) moderate rate of cooling (form II) or (iii) flash cooling (form III). These polymorphs are characterized by distinct crystal morphologies, powder diffractions and IR spectra. Single-crystal X-ray analysis of forms I and II revealed essentially the same geometries of 4-nitroquinoline-N-oxide molecules (with the exception of the nitrogroup characteristics), and distinct patterns of multiple hydrogen bonds, electrostatic interactions and π-stacking in their crystal structures.

Graphical abstract: Trimorphism of a model carcinogen 4-nitroquinoline-N-oxide

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Supplementary files

Article information


Submitted
24 Mar 2009
Accepted
07 Jul 2009
First published
24 Jul 2009

CrystEngComm, 2009,11, 2400-2405
Article type
Paper

Trimorphism of a model carcinogen 4-nitroquinoline-N-oxide

Y. P. Nizhnik, J. Lu, S. V. Rosokha and J. K. Kochi, CrystEngComm, 2009, 11, 2400
DOI: 10.1039/B905845A

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