Substituent effects on the triplet–singlet energy separation in diphenylmethylene

1977 ◽  
Vol 55 (12) ◽  
pp. 2286-2291 ◽  
Author(s):  
Robert W. R. Humphreys ◽  
Donald R. Arnold
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Ground State ◽  
Signal Intensity ◽  
Substituent Effects ◽  
Epr Spectra ◽  
Energy Separation ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

The electron paramagnetic resonance (epr) spectra of the diarylmethylenes: diphenylmethylene, p-cyanodiphenylmethylene, p-methoxydiphenylmethylene, p,p′-dimethoxydiphenylmethylene, p,p′-dicyanodiphenylmethylene, p-cyano-p′-methoxydiphenylmethylene, have been studied. The zero-field splitting parameters have been determined. The signal intensity as a function of temperature (ca. 4–20 K) indicates these methylenes are ground state triplet species.

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.

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.

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