Temperature Dependence of the Mössbauer Recoilless Fraction in Organotin Compounds

The temperature-dependent behavior of the Mössbauer effect recoil-free fraction associated with some organotin absorbers was investigated in the temperature range of 68° to 330°K. It was tentatively found that the recoil-free fraction of 119Sn in organotin compounds shows no systematic dependence on nearest-neighbor atom mass, ligand mass, molecular weight, coordination number with respect to the tin atom, macro or bulk chemical properties, isomer shift, or quadrupole splitting. The present investigation indicates, however, that a polymeric lattice structure which directly involves the 119Sn atom contributes significantly to a large recoil-free fraction.