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A simple 'non-covalent' approach was employed to obtain sensitive and specific sensors for pH, DNA and metal ions, by 'mixing' commercially available chemicals such as cationic or anionic water-soluble porphyrins and polypeptides. For example, under the appropriate conditions, the supramolecular complex formed between the anionic meso-tetrakis(4-sulfonatophenyl)porphine (H 2 TPPS) and the...
Resonance light scattering (RLS) and circular dichroism (CD) spectroscopies have been used to investigate the interactions of several cationic porphyrins with poly(dA) and poly(rA). Neither tetrakis(N-methylpyridinium-4-yl)porphine nor its zinc(II) derivative (H 2 T4 and ZnT4) show any tendency to form extended porphyrin assemblies in the presence of poly(dA). However, the poly(dA) complex...
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