Abstract

The third-order nonlinear optical susceptibility of phthalocyanines was recently reported to be large.¹ The third-order susceptibility of some related materials, the metal bis-phthalocyanines (MPc₂) is reported. These include YPc₂ and the lanthanide bis-phthalocyanines, NdPc₂, GdPc₂, and LuPc₂. The susceptibility of the anion ${\text{LuPc}}_2^{-}$ was also measured and compared with the neutral LuPc₂. All these bis-phthalocyanines are sandwich compounds with two interacting phthalocyanine rings per metal ion.

© 1990 Optical Society of America