RECENT DEVELOPMENTS IN HIGH-FREQUENCY HIGH MAGNETIC-FIELD CW EPR - APPLICATIONS IN CHEMISTRY AND BIOLOGY

A recent review of developments in high magnetic field/high frequency continuous wave electron paramagnetic resonance (EPR) spectroscopy is presented. The main motivations to develop instrumentation beyond ''co nventional'' spectrometers are the desire to increase the spectral res olution and the need for high frequencies in the case of large zero fi eld splitting systems. The potential of high frequency EPR is illustra ted with the study of a Mn based spin cluster, which also confirms the need for multifrequency measurements. Examples of high field/high fre quency EPR applications to chemistry and biology demonstrate that addi tional structural information can be obtained with the resolution achi eved at 245 GHz.