Electron spin-lattice relaxation in solid ethanol: the effect of nitroxyl radical hydrogen bonding and matrix disorder

Autor:	Kveder, Marina, Merunka, Dalibor, Jokić, Milan, Makarević, Janja, Rakvin, Boris
Rok vydání:	2010
Předmět:	Physics - Chemical Physics Condensed Matter - Soft Condensed Matter
Zdroj:	Phys. Rev. B 80, 052201 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.80.052201
Popis:	The electron spin-lattice relaxation of TEMPO and TEMPONE was measured at temperatures between 5 and 80 K in crystalline and glassy ethanol using X-band electron paramagnetic resonance spectroscopy. The experimental data at the lowest temperatures studied were explained in terms of electron-nuclear dipolar interaction between the paramagnetic center and the localized excitations, whereas at higher temperatures low-frequency vibrational modes from the host matrix and Raman processes should be considered. The strong impact of hydrogen bonding between the dopant molecule and ethanol host on the spin relaxation was observed in ethanol glass whereas in crystalline ethanol both paramagnetic guest molecules behaved similarly. Comment: 13 pages, 2 figures, 32 references
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1008.4031 Zobrazit plný text záznamu View this record from Arxiv