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Polymer catalysts for important photoelectron transfer reactions
Author(s) -
Guillet James E.,
Burke Nicholas A. D.,
Nowakowska Maria,
Paone Sergio
Publication year - 1998
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19981340106
Subject(s) - chromophore , phenanthrene , polymer , antenna effect , monomer , photochemistry , catalysis , electron transfer , chemistry , copolymer , materials science , chemical engineering , organic chemistry , luminescence , optoelectronics , engineering
Photozymes are novel water‐soluble polymers made by the copolymerization of mixtures of hydrophobic and hydrophilic monomers, some of which contain chromophores capable of absorbing light and transmitting the excitation energy to selected traps by means of the antenna effect. The interactions between these groups and water force the polymer to adopt a hypercoiled conformation with hydrophobic pockets similar to those in the catalytic sites of natural enzymes. Hydrophobic organic compounds in the water solution will seek out and localize themselves in these regions, where they are subjected to electronic energy transfer from the light‐excited antenna chromophores. The chemical reactions which occur are often different and more specific than in the case of photoreactions in common organic solvents. In a number of cases the reactions appear to proceed by an electron transfer mechanism. This paper summarizes recent results on the dechlorination of chlorinated aromatic and aliphatic compounds, and laser studies of multiphoton processes in aromatic compounds such as 9‐(acetoxymethyl)phenanthrene (AMP).