Reorientational dynamics of C60 in the solid state. An avoided level-crossing muon spin resonance study

Roduner, Emil; Prassides, Kosmas; Macrae, R.; Thomas, Ian M.; Niedermayer, Ch.; Binninger, U.; Bernhard, C.; Höfer, A.; Reid, I. D.

doi:10.1016/0301-0104(94)00204-n

Cited by 28 publications

(21 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the range of intermediate correlation times around the critical time scale of the experiment whi~h is given by the inverse hyper fine anisotropy, (21tD 1-)-, the shape of the L\1 resonance reacts very sensitively to the averaging mechanism [4]. It has been shown, for example, that on increasing temperature, the~l resonance of the Mu adduct to C 60 in polycrystalline C 60 disappears through broadening while the adducts to C 70 disappear through narrowing [5]. This was explained by isotropic rotational diffusion in the case of the spherical C 60 and by a fast wobbling mechanism with increasing amplitude in the case of C 70 .…”

Section: Introductionmentioning

confidence: 96%

“…Different theoretical treatments have been developed to model the effects of the dynamics. A simple pseudo-static approach in which the L\1 resonance was simulated as that of a static system with a dynamically averaged effective hyper fine anisotropy described well the cases of norbornene and of C 70 [5]. Spherical rotational diffusion was treated by means of a stochastic Liouville mechanism which describes the different types of resonances over the entire range of correlation times [8).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of the Cyclohexadienyl Radical Adsorbed in Porous Silica and NaZSM‐5

Roduner¹,

Schwager²,

Tregenna‐Piggott³

et al. 1995

Ber Bunsenges Phys Chem

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Dynamics of the Cyclohexadienyl Radical Adsorbed in Porous Silica and NaZSM‐5

Roduner¹,

Schwager²,

Tregenna‐Piggott³

et al. 1995

Ber Bunsenges Phys Chem

Self Cite

View full text Add to dashboard Cite

show abstract

“…Any rotational molecular dynamics, such as those observed in C60, can be discounted since our sample was solid without a rotational degree of freedom and there is no change in shape and/or position of the ALC, as would be expected. 32 Finally, although surrounding nuclear spins can have an effect on the shape of the ALC, they cannot account for the dramatic increase in relaxation rate, because of their small coupling strength to the muon spin. In the Appendix, it is demonstrated that the impact of a proton spin on the 1 resonance is negligible compared to the measured effect.…”

Section: B Electron Spin Relaxation Ratementioning

confidence: 99%

Importance of intramolecular electron spin relaxation in small molecule semiconductors

et al. 2011

View full text Add to dashboard Cite

Electron spin relaxation rate (eSR) is investigated on several organic semiconductors of different morphologies and molecular structures, using avoided level crossing muon spectroscopy as a local spin probe. We find that two functionalized acenes (polycrystalline tri(isopropyl)silyl-pentacene and amorphous 5,6,11,12-tetraphenyltetracene) exhibit eSRs with an Arrhenius-like temperature dependence, each with two characteristic energy scales similar to those expected from vibrations. Polycrystalline tris(8-hydroxyquinolate)gallium shows a similar behavior. The observed eSR for these molecules is no greater than 0.85 MHz at 300 K. The variety of crystal structures and transport regimes that these molecules possess, as well as the local nature of the probe, strongly suggest an intramolecular phenomenon general to many organic semiconductors, in contrast to the commonly assumed spin relaxation models based on intermolecular charge-carrier transport.

show abstract

“…Roduner and his co-workers have also used these techniques to obtain information about the reorientational behavior of cyclohexadienyl and similar radicals adsorbed on silica (Reid et al, 1990;Schwager et al, 1995;.…”

Section: Avoided Level Crossing or Alc-µsrmentioning

confidence: 99%

Muon Spectroscopy

Jayasooriya

Grinter

2009

Digital Encyclopedia of Applied Physics

View full text Add to dashboard Cite

This chapter provides a simple introduction to muon spectroscopy, beginning with some of the basic techniques used to produce muons, their relevant physical properties, and the consequences of implantation of muons into matter. An introduction to the theoretical aspects of the description of muons, electrons, and protons in magnetic fields, and to the interactions between these particles, is used as a basis for the discussion of a variety of experiments with transverse‐field and longitudinal‐field muon spectroscopies. These include muon spin relaxation, rotation, and resonance measurements. A very brief account of studies of chemical interest illustrates some of the types of information that can be extracted from muon spectroscopic measurements. The extensive list of references should enable readers to develop their knowledge further leading to an extension of the range of measurements on chemical and biological samples — areas where, we believe, wide‐ranging opportunities for original applications to well‐established problems exist.

show abstract

Reorientational dynamics of C60 in the solid state. An avoided level-crossing muon spin resonance study

Cited by 28 publications

References 35 publications

Dynamics of the Cyclohexadienyl Radical Adsorbed in Porous Silica and NaZSM‐5

Dynamics of the Cyclohexadienyl Radical Adsorbed in Porous Silica and NaZSM‐5

Importance of intramolecular electron spin relaxation in small molecule semiconductors

Muon Spectroscopy

Contact Info

Product

Resources

About