Photolysis of aqueous solutions of chlorophenols (4-chlorophenol, 2,4-dichlorophenol, 2,4,5-trichlorophenol and pentachlorophenol) in the presence of immobilized non-transition metal phthalocyanine photosensitizers onto Amberlite (R) is presented. The photosensitizers studied are: Al (AIOCPc) and Zn (ZnOCPc) octacarboxyphthalocyanines; Al (AIPcS(4)) and Zn (ZnPcS4) tetrasulfophthalocyanines; sulfortated phthalocyanine complexes (containing mixtures of differently substituted derivatives) of Al (AIPcS(mix)), Zn (ZnPcSmix), Ge (GePcSmix), Si (SiPcSmix) and Sn (SnPcSmix). Photolysis of the chlorophenols resulted mainly in the formation of chlorobenzoquinone derivatives. The complexes showed order of activity towards the transformation of pentachlorophenol as follows: ZnOCPc > SiPcSmix > SnPcSmix > ZnPcSmix > GePcSmix > ZnPcS4 > AlPcSmix > AIOCPc > AIPcS(4). The generation of singlet oxygen (O-1(2)) by these immobilized MPc photosensitizers was found to play a major role in their photoactivities towards the transformation of these chlorophenols. Langmuir-Hinshelwood (L-H) kinetic model studies showed that the ZnOCPc, GePcSmix and ZnPcSmix photocatalysis occurred on the catalysts surface. (c) 2005 Elsevier B.V. All rights reserved.