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Environmentally friendly photosensitizer: starch modified with chlorophyll‐type chromophores
Author(s) -
Nowakowska Maria,
Zapotoczny Szczepan,
Sterzel Monika
Publication year - 2007
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2180
Subject(s) - chromophore , photosensitizer , photochemistry , pheophorbide a , aqueous solution , chemistry , polymer , starch , chlorophyll , materials science , organic chemistry
A novel water‐soluble polymeric photosensitizer (SPheo) based on starch and containing pheophorbide (Pheo), a chlorophyll‐derived chromophore, was synthesized and its photophysical and photochemical properties were studied. Pheo chromophores attached to the polymeric chains of starch absorb light of the UV‐visible spectral region. The clustering of hydrophobic Pheo chromophores results in the formation of hydrophobic microdomains in aqueous solution where organic molecules can be solubilized. SPheo polymer efficiently photosensitizes reactions mediated by energy and/or electron transfer from the electronically excited chromophores to the molecules of organic compounds solubilized in polymeric microdomains or residing in water. Copyright © 2007 Society of Chemical Industry