scholarly journals Photoexcited triplet states of twisted acenes investigated by Electron Paramagnetic Resonance

2019 ◽  
Vol 21 (38) ◽  
pp. 21588-21595 ◽  
Author(s):  
Claudia E. Tait ◽  
Anjan Bedi ◽  
Ori Gidron ◽  
Jan Behrends
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Zero Field ◽  
Triplet States ◽  
Zero Field Splitting ◽  
Paramagnetic Resonance ◽  
Field Splitting ◽  
Spin Polarisation ◽  
Electron Paramagnetic ◽  
Hyperfine Couplings

Increased twisting of the anthracene core affects the ISC efficiency and induces changes in zero-field splitting parameters, spin polarisation and hyperfine couplings.

scholarly journals Broadband electron paramagnetic resonance of a molecular spin triangle

2021 ◽  
Vol 23 (36) ◽  
pp. 20268-20274
Author(s):  
Jérôme Robert ◽  
Philippe Turek ◽  
Matthieu Bailleul ◽  
Athanassios K. Boudalis
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Sweep ◽  
Paramagnetic Resonance ◽  
Field Splitting ◽  
Molecular Spin ◽  
Electron Paramagnetic

A new broadband EPR spectrometer capable of measuring in frequency- and field-sweep modes is described and its functionality is demonstrated on a ferromagnetic Cu3II triangle demonstrating a moderate zero-field splitting of its quartet ground state.

An Electron Paramagnetic Resonance Investigation of Iron-Indium Pairs in Silicon

1989 ◽  
Vol 163 ◽  
Author(s):  
P. Emanuelsson ◽  
W. Gehlhoff ◽  
P. Omling ◽  
H. G. Grimmeiss
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Temperature Dependence ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Paramagnetic Resonance ◽  
Field Splitting ◽  
Resonance Investigation ◽  
Electron Paramagnetic Resonance Investigation ◽  
Electron Paramagnetic

AbstractThree different Electron Paramagnetic Resonance (EPR) signals, one trigonal and two orthorhombic, which originates from iron-indium pairs in silicon are investigated. It is shown that the two orthorhombic spectra can be explained as transitions within the two doublets of a S=3/2 system with a large zero-field splitting. The temperature dependence of-the intensities reveals that the newly discovered spectrum corresponds to the lower doublet and that the zero-field splitting is 9.8 ± 2.0 cm-1.

Electron Paramagnetic Resonance (34 and 55 GHz) Studies of Hemoproteins

1973 ◽  
Vol 51 (8) ◽  
pp. 1142-1153 ◽  
Author(s):  
A. L. Gray ◽  
H. A. Buckmaster
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Frequency Dependence ◽  
Line Width ◽  
Measurement Techniques ◽  
Single Type ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Paramagnetic Resonance ◽  
Field Splitting ◽  
Electron Paramagnetic

Measurements of the 34 and 55 GHz electron paramagnetic resonance (E.P.R.) spectra of single type A crystals of metmyoglobin, metmyoglobin fluoride and methemoglobin and polycrystalline metmyoglobin and methemoglobin at 77 K are reported. The frequency dependence of the g-values of metmyoglobin, metmyoglobin fluoride, and methemoglobin is used to estimate the zero-field splitting (2D). It is found that (2D) [Formula: see text], (2D) (MbF) = (8.1 ± 1.0) cm−1, and 15 cm−1 <(2D) (HbH2O). The observed angular E.P.R. line width variation of these hemoproteins is compared with the variation predicted by a misorientation hypothesis. The frequency dependence of these line widths is also studied and shown to be consistent with a statistical variation in the zero-field splitting. The g-value and line width measurements are compared with those reported previously and the estimates of the zero-field splitting are compared with the values obtained using other measurement techniques.

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