Eliana F. A. Carvalho, M. Calvete, J. Cavaleiro
Nov 25, 2010
Citations
0
Influential Citations
17
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract The synthesis and characterization of three new indium phthalocyanines bearing eight N -alkyl- or N -arylsulfonamide groups is described. The new compounds are {2,3,9,10,16,17,23,24-octakis[4-(4-methoxyphenylaminosulfonyl]phenoxy]phthalocyaninato}indium(III) chloride ( 7 ), {2,3,9,10,16,17,23,24-octakis[4-diethylaminosulfonyl)phenoxy]phthalocyaninato}indium(III) chloride ( 8 ) and {2,3,9,10,16,17,23,24-octakis[4-didodecylaminosulfonyl)phenoxy]phthalocyaninato}indium(III) chloride ( 9 ), and were obtained in 23–49% yields. The precursors of phthalocyanines 7 – 9 are sulfonamide-substituted phthalonitriles that can be prepared by reacting 4,5-bis(4-chlorosulfonylphenoxy)phthalonitrile ( 3 ) with amines. The nonlinear transmission (NLT) of complexes 7 – 9 was determined at 532 nm using ns pulses. All three phthalocyanines behave as reverse saturable absorbers with increasing efficiency of optical limiting in the order 7 8 9 . A comparative analysis of the NLT results is attempted in terms of the structural differences in 7 – 9 .