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Optical and crystallographic evidence for the choice of space group,nature of the crystal phase change and high birefringence in Ln(Apy)6I3 |
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| Authors: | J. C. Canit A. F. Kirby R. A. Palmer J. D. Korp I. Bernal |
| Affiliation: | 1. Laboratoire d'Optique Physique, école Supérieure de Physique et de Chimie Industrielle, 10, Rue Vauquelin, 75005, Paris, France 2. Department of Chemistry, Duke University, 27706, Durham, North Carolina 3. Department of Chemistry, University of Houston, 77004, Houston, Texas |
| Abstract: | Reexamination of the structures and electronic spectra of Ln(antipyrene)6I3 crystals indicates that the series is isomorphous [space groupR3, (No. 146);Z=1] at room temperature despite spectral evidence of a centric ligand field for the Ln ions. High birefringence and phase changes at lower temperatures (<60 K for Ln=Pr) limit the possibilities for CD meaurement. |
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