Study of photochemical reactions of coniferyl alcohol .1. Mechanism and intermediate products of UV radiation-induced polymerization of coniferyl alcohol
Апстракт
Ultraviolet light-induced photochemical transformations of coniferyl alcohol have been studied, using spectrophotometric and H-1 NMR approaches. It was shown earlier that coniferyl alcohol can be polymerized not only enzymically but also by photoirradiation, This study furthers our knowledge on the UV radiation-induced polymerization of coniferyl alcohol. In the photochemical reaction of coniferyl alcohol, quinone-methide is the first transient formed. In subsequent reactions quinone-methide produces dimers, oligomers and a polymer as the end product. The reaction rate constants are pH dependent. The results are interpreted in terms of an ionic mechanism of the photochemical reaction, contrary to enzymic polymerization that involves formation of phenoxy radicals. The study may have ecological importance because of the increase of UV radiation reaching the earth's surface due to ozone layer depletion.
Извор:
Photochemistry and Photobiology, 1997, 65, 2, 284-291Издавач:
- Amer Soc Photobiology, Augusta
Институција/група
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Radotić, Ksenija AU - Zakrzewska, J AU - Sladić, Dušan AU - Jeremić, Marko PY - 1997 UR - https://cherry.chem.bg.ac.rs/handle/123456789/2586 AB - Ultraviolet light-induced photochemical transformations of coniferyl alcohol have been studied, using spectrophotometric and H-1 NMR approaches. It was shown earlier that coniferyl alcohol can be polymerized not only enzymically but also by photoirradiation, This study furthers our knowledge on the UV radiation-induced polymerization of coniferyl alcohol. In the photochemical reaction of coniferyl alcohol, quinone-methide is the first transient formed. In subsequent reactions quinone-methide produces dimers, oligomers and a polymer as the end product. The reaction rate constants are pH dependent. The results are interpreted in terms of an ionic mechanism of the photochemical reaction, contrary to enzymic polymerization that involves formation of phenoxy radicals. The study may have ecological importance because of the increase of UV radiation reaching the earth's surface due to ozone layer depletion. PB - Amer Soc Photobiology, Augusta T2 - Photochemistry and Photobiology T1 - Study of photochemical reactions of coniferyl alcohol .1. Mechanism and intermediate products of UV radiation-induced polymerization of coniferyl alcohol VL - 65 IS - 2 SP - 284 EP - 291 UR - https://hdl.handle.net/21.15107/rcub_cherry_2586 ER -
@article{ author = "Radotić, Ksenija and Zakrzewska, J and Sladić, Dušan and Jeremić, Marko", year = "1997", abstract = "Ultraviolet light-induced photochemical transformations of coniferyl alcohol have been studied, using spectrophotometric and H-1 NMR approaches. It was shown earlier that coniferyl alcohol can be polymerized not only enzymically but also by photoirradiation, This study furthers our knowledge on the UV radiation-induced polymerization of coniferyl alcohol. In the photochemical reaction of coniferyl alcohol, quinone-methide is the first transient formed. In subsequent reactions quinone-methide produces dimers, oligomers and a polymer as the end product. The reaction rate constants are pH dependent. The results are interpreted in terms of an ionic mechanism of the photochemical reaction, contrary to enzymic polymerization that involves formation of phenoxy radicals. The study may have ecological importance because of the increase of UV radiation reaching the earth's surface due to ozone layer depletion.", publisher = "Amer Soc Photobiology, Augusta", journal = "Photochemistry and Photobiology", title = "Study of photochemical reactions of coniferyl alcohol .1. Mechanism and intermediate products of UV radiation-induced polymerization of coniferyl alcohol", volume = "65", number = "2", pages = "284-291", url = "https://hdl.handle.net/21.15107/rcub_cherry_2586" }
Radotić, K., Zakrzewska, J., Sladić, D.,& Jeremić, M.. (1997). Study of photochemical reactions of coniferyl alcohol .1. Mechanism and intermediate products of UV radiation-induced polymerization of coniferyl alcohol. in Photochemistry and Photobiology Amer Soc Photobiology, Augusta., 65(2), 284-291. https://hdl.handle.net/21.15107/rcub_cherry_2586
Radotić K, Zakrzewska J, Sladić D, Jeremić M. Study of photochemical reactions of coniferyl alcohol .1. Mechanism and intermediate products of UV radiation-induced polymerization of coniferyl alcohol. in Photochemistry and Photobiology. 1997;65(2):284-291. https://hdl.handle.net/21.15107/rcub_cherry_2586 .
Radotić, Ksenija, Zakrzewska, J, Sladić, Dušan, Jeremić, Marko, "Study of photochemical reactions of coniferyl alcohol .1. Mechanism and intermediate products of UV radiation-induced polymerization of coniferyl alcohol" in Photochemistry and Photobiology, 65, no. 2 (1997):284-291, https://hdl.handle.net/21.15107/rcub_cherry_2586 .