Tetracarboxyphthalocyanine

Several zinc(II) and aluminum(III) phthalocyanine derivatives substituted with carboxylic acid and sulfonic acid groups were anchored to nanocrystalline Ti02 films and tested for their photovoltaic behavior.72,73 Interestingly, zinc(II)-2,9,16,23-tetracarboxyphthalocyanine (55) exhibited 45% monochromatic current conversion efficiency at 700 nm. It is shown that electron injection to Ti02 occurs from the excited singlet state of the phthalocyanine derivatives. The... 

Experiment 5-11 Covalent Binding of Tetracarboxyphthalocyanine 48 (R = -COOH M = Co(II)) at Modified Silica for Compound 57 and Catalytic Oxidation of Thiols (Section 5.2.1) [137-139]... 

Electrocatalytic reduction of COj at a PP-coated film containing Re(bpy)(C03)Cl was reported. Reduction of CO, formic acid and formaldehyde was mediated by thin films of Co(I)-4,4, 4",4" -tetracarboxyphthalocyanine... 

Some other reports describe the binding of tetracarboxyphthalocyanines at linear polystyrene [138] or macroporous polystyrene grafted with polyvinylamine [139,140], of chlorosulfonated phthalocyanines at macroreticular polystyrene [141] and of tetra-chlorocarboxyphthalocyanines at poly(y-benzyl-L-glutamate) [142]. 

Ligands also play an important role in the catalyzed ORR. They not only serve as part of the active site, but also keep the metal in a stable form on the electrode surface. The substituents of the macrocycle ligand seem to have less effect in comparison with the type of macrocycle [23]. Phthalocyanine (Pc), tetrasulfophthalocyanine (TSP), tetracarboxyphthalocyanine (TcPc), polymeric phthalocyanine, tetraphenylporphyrin (TPP), tetramethoxyphenylporphyrin (TMPP), and dibenzotetraazaannulene (TAA) all can form complexes with Fe and Co. The majority of thus formed complexes have ORR catalytic activity. 

Water soluble cobalt(ll) 2,9,16,23-tetrasulfophthaloeyanine, zinc(II)-2,9,16,23-tetrasulfo-phthalocyanine, zinc(ll)tetracarboxyphthalocyanine, and non-metallic sulfophthalocyanine complexes are catalysts and photocatalysts for the oxidation of sulfide, sulfite and thiosulfate ions by dioxygen. Typical conditions are 293 K, 1 atm Oi and pH 9.24 in aqueous solutioaThe cobalt phthalocyanine complexes show high catalytic activity only in the... 

Chromonic liquid crystals are a special class of lyotropic liquid crystals. Flat aromatic systems with polar substituents form columnar aggregates by n-n interactions in solution. The mesophases of concentrated DNA solutions or of copper-tetracarboxyphthalocyanine are examples for this. Special types of chiral mesophases have been observed [29]. 

Synthesis of Polystyrene-Bonded Fe(lll)-4,4, 4", 4" -tetracarboxyphthalocyanine [Fe(lll)-taPc] by Friedel-Crafts Reaction [32,33]... 

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