Abstract
The infrared microscope spectra of theA,B, andC polymorphs of naphthazarin (5,8-dihydroxy-1,4-naphthoquinone) can be distinguished clearly. When naphthazarin is dispersed in KBr, such a distinction can only be made when experimental precautions are taken during the preparation of the pellet. Low temperature infrared studies indicate that a phase transition takes place in naphthazarin around 110 K.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
F. A. Herbstein, M. Kapon, G. M. Reisner, M. S. Lehman, R. B. Kress, R. B. Wilson, W.-I. Shiau, E. N. Duesler, I. C. Paul, D. Y. Curtin,Proc. Roy. Soc. London, A 1985,399, 295; and references quoted therein.
C. J. H. Schutte, S. O. Paul,S. Afr. J. Chem. 1986,39, 252.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Paul, S.O., Schutte, C.J.H. Infrared spectra of the polymorphs of naphthazarin: Microscopy and low temperature studies. Mikrochim Acta 94, 171–173 (1988). https://doi.org/10.1007/BF01205863
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01205863