Resonance Spectra Of Single Crystals Research Articles

ELECTRON MAGNETIC RESONANCE OF CH(COOH) 2

We have carried out a detailed analysis of the electron magnetic resonance spectra of single crystals of malonic acid that were subjected to 50-kv. X-ray damage at room temperature. A typical spectrum of an aged single crystal is shown in Figure 1. The positions and intensities of the principle signals (1-4 in Fig. 1) depend on the crystal orientation relative to the applied magnetic field (3,400 gauss). All of the observed spectra can be accounted for in terms of the following set of assumptions.

Paramagnetic Resonance Absorption of Carbazyl and Hydrazyl

The paramagnetic resonance spectra of single crystals of carbazyl and hydrazyl show distinct anisotropies, which appear to be associated with the microscopic magnetic susceptibility within the molecule in the vicinity of the unpaired electron. This leads to an asymmetry in the absorption line of a polycrystalline specimen. The hyperfine structures of the two radicals in a benzene solution show that in carbazyl the two N atoms are nonequivalent in that the odd electron spends approximately twice as long in the vicinity of one, compared to the other.