| | 1 | Author
| Robert Becker, Wolfgang Brockner, Brigitte Eisenmann | Requires cookie* | | | Title
| Kristallstruktur und Schwingungsspektrum des Thallium(I)-Zinn(II)-ortho-Thiophosphates TlSnPS4  | | | | Abstract
| TlSnPS4 crystallizes in the orthorhombic system, space group P na21 (Nr. 33), Z = 4 with the lattice constants a = 1175.8 (5) pm, b = 890.1 (4) pm, c = 663.3 (4) pm. In the structure are sligthly distorted discrete PS4_ anions. The far infrared, infrared and Raman spectrum is assigned on the basis o f P S]-units with C 3v symmetry. According to the DTA data the m elting point for TlSnPS4 is 575 ± 5 °C. The title compound is not moisture sensitive and semi-conducting. | | | |
Reference
| Z. Naturforsch. 42a, 1309—1312 (1987); received Septem ber 15 1987 | | | |
Published
| 1987 | | | |
Keywords
| ortho-Thiophosphate, TlSnPS4, Crystal Structure, Vibration Spectrum | | | |
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| default:Reihe_A/42/ZNA-1987-42a-1309.pdf | | | | Identifier
| ZNA-1987-42a-1309 | | | | Volume
| 42 | |
| 2 | Author
| J. Krzystek, H.J U C Von Schütz, Wolf, R.-D Stigler, J. J. Stezowski | Requires cookie* | | | Title
| Characterization of the Phenanthrene-Tetrachlorophthalic Anhydride (P/TCPA) 1:1 Charge-Transfer Crystal: Spectroscopic and Structural Investigations | | | | Abstract
| The 1:1 phenanthrene-tetrachlorophthalic anhydride (P/TCPA) charge-transfer complex crystalizes with monoclinic symmetry, space group P2,, with two magnetically inequivalent stacks in the unit cell. The noncentrosymmetric space group is very unusual for CT-complexes. The optical emission spectra at low temperature are characterized by a strong CT phospho-rescence and a weak CT fluorescence and delayed fluorescence. The S, band lies at 22 800 ± 100 cm" 1 , the T, band at 21 200 ± 100 cm" 1 . Above 15 K triplet excitons, moving along the stacks are revealed by ESR. They have a CT character of about 30%, coinciding with that of the shallow X-traps found by ODMR at jow temperatures. A further trap, with zero-field-splitting (zfs) parameters of £> = ±0.0617, E = + 0.0116 cm" 1 has a much larger CT character of 50% as found in the isolated complex in low-temperature glass [1]. A structural model is proposed. | | | |
Reference
| Z. Naturforsch. 42a, 622—630 (1987); received February 28 1987 | | | |
Published
| 1987 | | | |
Keywords
| Charge-transfer crystal, crystal structure, fluorescence, phosphorescence, triplet excitons | | | |
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| default:Reihe_A/42/ZNA-1987-42a-0622.pdf | | | | Identifier
| ZNA-1987-42a-0622 | | | | Volume
| 42 | |
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