2-FREQUENCY ELECTRON-SPIN ECHO ENVELOPE MODULATION AND ELECTRON-SPIN ECHO DECAY OF CU(II)-(ALKYLTHIO)TETRAAZAPORPHYRIN POWDER

Electron spin echo signals from a powder sample of Cu(II)-(alkylthio)t etraazaporphrin diluted in the corresponding Ni(II) compound are analy zed. The electron spin echo envelope modulation is analyzed to determi ne the structural arrangement around the paramagnetic center, and the electron spin echo decay is studied to obtain information on the elect ron spin relaxation mechanism. This information is of help in elucidat ing the structure and properties of Langmuir\Blodgett films fabricated by the title material. The experiments were run both at X-band (9.8 G Hz) and at S-band (2.7 GHz), and the experimental spectra were interpr eted by best-fit procedures with computed patterns in the time domain.