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Polymeric Photosensitizers, 5. Synthesis and Photochemical Properties of Poly[( N ‐isopropylacrylamide)‐ co ‐(vinylbenzyl chloride)] Containing Covalently Bound Rose Bengal Chromophores
Author(s) -
Nowakowska Maria,
Kȩpczyński Mariusz,
Da̧browska Monika
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010601)202:9<1679::aid-macp1679>3.0.co;2-r
Subject(s) - rose bengal , singlet oxygen , photosensitizer , chemistry , chromophore , aqueous solution , photochemistry , quantum yield , polymer , polymer chemistry , methanol , covalent bond , oxygen , organic chemistry , fluorescence , physics , quantum mechanics
The new polymeric photosensitizer poly[( N ‐isopropylacrylamide)‐ co ‐(vinylbenzyl chloride/Rose Bengal)] for singlet oxygen production was synthesized and studied. The polymer is soluble in polar solvents, such as methanol and water. It displays a lower critical solution temperature in aqueous solutions at 31.7 ± 0.3°C. The quantum yield of singlet oxygen formation by the Rose Bengal‐polymer bound chromophore in methanol solution is close to that determined for free Rose Bengal. In an aqueous solution of the polymer, the efficiency of singlet oxygen formation is considerably lower. This phenomenon results mainly from the aggregation of the Rose Bengal chromophores.