@article {4804,
	title = {Hfcs of the C(6)H(6)Mu radical in NaY zeolites},
	journal = {Physica B-Condensed Matter},
	volume = {289},
	year = {2000},
	note = {ISI Document Delivery No.: 330GBTimes Cited: 6Cited Reference Count: 128th International Conference on Muon Spin Rotation, Relaxation and ResonanceAUG 30-SEP 03, 1999LES DIABLERETS, SWITZERLANDEuropean Phys Soc, Paul Scherrer Inst, Eidgenoss Tech Hochschule, Univ Zurich, European Sci Fdn, Swiss Natl Sci Fdn, Neue Aargauer Bank, Sauerstoffwerk Lenzburg AG, Hamamatsu Photon, EG \& G Berthold GmbH \& Co KG, Prophysik AG, Kroger \& Co, Wenger SA, Alcatel Hochvakuum Tech GmbH, Sunrise AG, Dramer AG, Automobil \& Motoren AG},
	month = {Aug},
	pages = {603-606},
	type = {Proceedings Paper},
	abstract = {The hyperfine interactions of the MuC(6)H(6), radical in NaY zeolites at low to moderate benzene loadings have been measured by both the FT-mu SR and ALC-mu SR techniques over a wide temperature range. From a preliminary interpretation of the data, the hyperfine coupling constants for the muon and proton of the - CHMu methylene group in two different orientations for the radical bound to the S-II cation site have been determined. At 322 K these values are: A(mu)(1)= 606 +/- 2 MNz and A(p)(1)= 108 +/- 2 MHz, for the muon on the opposite side of the ring from the cation; and A(mu)(2) = 430 +/- 2 MHz and A(p)(2) = 70 +/- 5 MHz, for the muon on the same side. These results as well as their trends with temperature demonstrate that the MuC(6)H(6) radical adopts a non-planar equilibrium geometry due to the strong interaction of the pi electron density with the Na cation. (C) 2000 Elsevier Science B.V. All rights reserved.},
	keywords = {benzene, cyclohexadienyl radical, DIFFRACTION, DIFFUSION, DYNAMICS, hyperfine couplings, NaY zeolite, NEUTRON, SILICA, SUBSTITUTED CYCLOHEXADIENYL RADICALS},
	isbn = {0921-4526},
	url = {<Go to ISI>://000087953500158},
	author = {Fleming, Donald G. and Shelley, M. and Arseneau, D. J. and Senba, M. and Pan, J. J. and Kreitzman, S. R. and Roduner, E.}
}
@article {4728,
	title = {Reorientational dynamics of aza-cyclohexadienyl radicals in pyridinium tetrafluoroborate},
	journal = {Physica B-Condensed Matter},
	volume = {289},
	year = {2000},
	note = {ISI Document Delivery No.: 330GBTimes Cited: 8Cited Reference Count: 128th International Conference on Muon Spin Rotation, Relaxation and ResonanceAUG 30-SEP 03, 1999LES DIABLERETS, SWITZERLANDEuropean Phys Soc, Paul Scherrer Inst, Eidgenoss Tech Hochschule, Univ Zurich, European Sci Fdn, Swiss Natl Sci Fdn, Neue Aargauer Bank, Sauerstoffwerk Lenzburg AG, Hamamatsu Photon, EG \& G Berthold GmbH \& Co KG, Prophysik AG, Kroger \& Co, Wenger SA, Alcatel Hochvakuum Tech GmbH, Sunrise AG, Dramer AG, Automobil \& Motoren AG},
	month = {Aug},
	pages = {607-611},
	type = {Proceedings Paper},
	abstract = {{Pyridinium tetrafluoroborate is a ferroelectric with a paraelectric-ferroelectric phase transition of second order, which is exceptional for multidirectional ferroelectrics, Avoided-level-crossing muon-spin resonance has been used to show that the Mu substituted aza-cyclohexadienyl radical derived from the pyridinium ions undergoes fast uniaxial rotation around the axis perpendicular to the molecular plane, confirming earlier results by Czarnecki et al. The changes in reorientational dynamics between 239 and 244 K also verify the existence of a phase transition in this range, as found by Czarnecki. Furthermore, the results give strong evidence that superimposed on the rotation there is a wobbling motion of the rotational axis which freezes in at the first transition temperature},
	keywords = {avoided-level-crossing muon-spin resonance, cyclohexadienyl radical, MAGNETIC-RESONANCE, PHASE-TRANSITION, pyridinium, REORIENTATIONAL DYNAMICS, TETRAFLUOROBORATE, VARIANT},
	isbn = {0921-4526},
	url = {<Go to ISI>://000087953500159},
	author = {Beck, B. and Roduner, E. and Dilger, H. and Czarnecki, P. and Fleming, Donald G. and Reid, I. D. and Rhodes, C. J.}
}
