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          Institute: MPI für Polymerforschung     Collection: MPI Polymerforschung     Display Documents



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ID: 56201.0, MPI für Polymerforschung / MPI Polymerforschung
Synthesis of a polyphenol with a mesoionic 6-oxo-1,6-dihydropyrimidin-3-ium-4-olate as pendant group and its photochemical behavior
Authors:Tonami, H.; Uyama, H.; Kobayashi, S.; Menges, B.; Mittler, Silvia; Theis, A.; Ritter, H.
Language:English
Date of Publication (YYYY-MM-DD):2003-05-30
Title of Journal:Macromolecular Chemistry and Physics
Journal Abbrev.:Macromol. Chem. Phys.
Volume:204
Issue / Number:8
Start Page:1079
End Page:1084
Review Status:not specified
Audience:Not Specified
Abstract / Description:This study deals with synthesis of a polyphenol bearing photosensitive groups, and its photochemical behavior upon UV radiation. Mesoionic 5-(4-hydroxybenzyl)-6-oxo-1,2,3-triphenyl-1,6-dihydropyrimidin-3-ium-4-olate was prepared by condensation of 4-benzyloxybenzylmalonic acid with N,N'-diphenylbenzamidine using dicyclohexylcarbodiimide as condensing agent, followed by deprotection of the benzyl group. The monomer was polymerized by an iron-salen complex to give a polymer with a mesoionic 6-oxo-1,6-dihydropyrimidin-3-ium-4-olate moiety as the pendant group. Spin coated polymer films were prepared and characterized. It was shown by IR spectroscopy that irradiation with UV light converted the mesoionic structure to a bis(β-lactam) structure. Waveguide spectroscopy showed a large decrease in the film thickness without refractive index changes during irradiation.
Free Keywords:metal-organic catalysts/organometallic catalysts, photochemistry, polyphenols, refractive index, spin coating
Comment of the Author/Creator:Date: 2003, MAY 30
External Publication Status:published
Document Type:Article
Affiliations:MPI für Polymerforschung
External Affiliations:Inst Organ Chem & Macromol Chem, D-40225 Düsseldorf, Germany.; Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Kyoto 6068501, Japan.
Identifiers:ISI:000183607600004 [ID No:1]
ISSN:1022-1352 [ID No:2]
LOCALID:P-03-249
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