Phthalocyanines as Active Materials for Optical Limiting

This work gives an overview concerning the optical limiting processes in phthalocyanines. In particular, the synthesis and the relevant optical properties of a series of axially substituted indium(III)− and titanium(IV)−phthalo- and -naphthalocyanines are described. Several techniques, such as transient absorption, Z-scan, and degenerate four-wave mixing, have been used for assessing the optical properties and optical limiting performance of the investigated compounds.