Infrared spectra of the polymorphs of naphthazarin: Microscopy and low temperature studies |
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| Authors: | Sylvia O. Paul Casper J. H. Schutte |
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| Affiliation: | (1) Department of Chemistry, University of South Africa, P.O. Box 392, 0001 Pretoria, Republic of South Africa |
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| 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. |
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| Keywords: | naphthazarin (5,8-dihydroxy-1,4-naphthoquinone) infrared microscopy polymorphs of naphthazarin low temperature studies phase transitions of naphthazarin |
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