| | 1 | Author
| Masao Hashimoto, Yuko Monobe, Hiromitsu Terao, Haruo Niki, Koichi Mano | Requires cookie* | | | Title
| Phase Transition and Crystal Dynamics of 4-Bromobenzyl Alcohol  | | | | Abstract
| For the title compound a phase transition from Phase II to Phase I (low and room temperature phases, respectively) was found at ca. 217 K. The temperature dependence of the 8 'Br NQR frequency and that of the dielectric constant showed anomalies at ca. 195 K that were tentatively attributed to a higher order phase transition. A similar anomaly was found at ca. 218 K for 4-chlorobenzyl alcohol which showed a II-I transition at 236 K. The dielectric dispersion observed for both compounds at low temperatures indicates an excitation of a molecular motion with the dielectric relaxation rate of ca. 1 kHz. The temperature dependence of the sl Br NQR frequencies of 2-and 3-bromobenzyl alcohol, measured at T > 77 K, gave no evidence of phase transition in their crystals. | | | |
Reference
| Z. Naturforsch. 53a, 436—441 (1998); received March 24 1998 | | | |
Published
| 1998 | | | |
Keywords
| NQR, Phase Transition, Molecular Motion, Dielectric Dispersion | | | |
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| default:Reihe_A/53/ZNA-1998-53a-0436.pdf | | | | Identifier
| ZNA-1998-53a-0436 | | | | Volume
| 53 | |
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