Simulation of EPR and time resolved EPR lineshapes in partially ordered glasses
| العنوان: | Simulation of EPR and time resolved EPR lineshapes in partially ordered glasses |
|---|---|
| المؤلفون: | Luigi Pasimeni, Marco Ruzzi, Ulderico Segre |
| المصدر: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 56:265-271 |
| بيانات النشر: | Elsevier BV, 2000. |
| سنة النشر: | 2000 |
| مصطلحات موضوعية: | Liquid crystals, excited triplet state, fullerene, EPR spectroscopy, Molecular physics, Spectral line, Analytical Chemistry, law.invention, Paramagnetism, law, Liquid crystal, Tensor, Triplet state, Electron paramagnetic resonance, Instrumentation, Spectroscopy, Condensed matter physics, Chemistry, Electron Spin Resonance Spectroscopy, Mesophase, Models, Theoretical, Carbon, Atomic and Molecular Physics, and Optics, Magnetic field, Condensed Matter::Soft Condensed Matter, Spin Labels, Fullerenes, Glass |
| الوصف: | Simulation of magnetic resonance spectra of probes in partially ordered glasses requires in principle a numerical integration on the full set of three Euler angles omega=(alpha beta gamma) from a laboratory fixed to a molecule fixed reference frame. It is shown that it is possible to manage efficiently this problem by using the algebraic properties of the Wigner matrix elements. This analysis is applied to time resolved EPR (TREPR) spectra of a series of bis-adducts of C60 in the ordered glass of a nematic liquid crystal solvent. A paramagnetic triplet state is created by light excitation and TREPR spectra are obtained with the external magnetic field set parallel or perpendicular to the director n of the mesophase. The preferred orientation in the mesophase of the triplet state zero field tensor is determined. |
| تدمد: | 1386-1425 |
| DOI: | 10.1016/s1386-1425(99)00237-1 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15f4b85473e4aae0c45748c756d3ded1 https://doi.org/10.1016/s1386-1425(99)00237-1 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....15f4b85473e4aae0c45748c756d3ded1 |
| قاعدة البيانات: | OpenAIRE |
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