Electron spin resonance study of manganese(II) doped into hexakis-(4-methylpyridine N-oxide)-zinc, -cadmium, and -mercury perchlorates

Abstract

The powder e.s.r. spectra of mangenese(II) ions doped into [M(4Me-pyo)₆][ClO₄]₂(M = Zn, Cd, or Hg: 4Me-pyo = 4-methylpyridine N-oxide) have been interpreted by exact diagonalisation of a spin-Hamiltonian matrix. The D values decrease slightly (from 0.063 to 0.059 cm^–1) with increasing size of the host metal ion, while λ is constant (0.06) within the series. Spin-forbidden transitions, particularly those in the yz plane, contribute significantly to the observed spectra.