Perylene hydrolysis

Fossato VU, Nasci C, Dolci (1979) 3,4-benzopyrene and perylene in mussels, Mytilus sp., from the Laguna Veneta, north-east Italy. Mar Env Res 2 47-53 Foster GD, Crosby DG (1986) Xenobiotic metabolism of p-nitrophenol derivatives by the rice field crayfish Procambrus clarkii). Environ Toxicol Chem 5 1059-1070 Foster GD, Crosby DG (1987) Comparative metabolism of nitroaromatic compounds in freshwater, brackish water and marine decapod crustaceans. Xenobiotica 17 1393-1404 Foureman GL (1989) Enzymes involved in metabolism of PAH by fishes and other aquatic animals hydrolysis and conjugation enzymes (or phase II enzymes). In Varanasi U (ed) Metabolism of polycylic aromatic hydrocarbons in the aquatic environment. CRC Press, Boca Raton, Florida, pp 185-202... 

Finally, the open form of the dyad (dyad 1-a) was synthesized by Suzuki coupling of the PDI part 6a and the TDI part 13 (Scheme 2, step g). The dyad 1-a was obtained in 60% yield after gel permeation chromatography (GPC). Due to its extended aromatic core, terrylene diimide shows a much lower solubility than its smaller homologue perylene diimide. Concerning the poor solubility of the TDI unit, the cyclization reaction was performed as the last step (Scheme 2, step h). As shown in Fig. 2, the perylene part is susceptible to hydrolysis, so the cyclization had to be performed rapidly (within 30 min). Cyclization using K2CO3 as base in ethanolamine completed the synthesis of the dyad 1. Besides imreacted 1-a, the... 

Synthesis of Perylene Tetracarboxylic Acid Dianhydride (PTCA) by Hydrolysis of PTCI to PTCA, and PTCA as a Pigment (Pigment Red 224)... 

PTCA (10) is synthesized from PTCI (6) by hydrolysis in concentrated sulfuric acid at temperatures in excess of 200 °C. A number of by-products are typically present, including sulfonated perylenes and the half imide, half anhydride (11). 

Hydrolysis and condensation of the PDBS tubes were realized by immersing a thin film into HCl solution (pH 2). The pre-organization of the precursor into tubular objects could not be transcribed into the H-PDBS hybrid material. The contraction of the silica network resulted in a collapsed lamellar structure. However, the optical properties of the perylene residue were retained going from PDBS tubes to the H-PDBS hybrid material. 

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