Influence of gamma radiation on neodymium bisphthalocyanine

The neodymium(III) bisphthalocyanine (NdPc2) discoloration under gamma radiation has been studied. The NdPc2 entrapped in silica matrices have been prepared by the sol–gel method. The decomposition of the dye under gamma rays leads to decay of the absorption bands in the Q-band region. The differences in behavior of NdPc2 in liquid solutions and in the silica matrices are discussed. The sol–gel matrix seems to stabilize the entrapped molecule.