Synthesis and high ranked NLT properties of new sulfonamide-substituted indium phthalocyanines

Three new indium phthalocyanines bearing eight N-alkyl- or N-arylsulfonamide groups were synthesized and their nonlinear transmission (NLT) properties were evaluated. All three phthalocyanines behave as reverse saturable absorbers with increasing efficiency of optical limiting in the sequence 7 < 8 < 9.