Matches in SemOpenAlex for { <https://semopenalex.org/work/W2091509406> ?p ?o ?g. }
Showing items 1 to 66 of
66
with 100 items per page.
- W2091509406 endingPage "154" @default.
- W2091509406 startingPage "146" @default.
- W2091509406 abstract "Lignin model compounds representative of etherified end groups [(E)-3-(3,4-dimethoxyphenyl)-2-propenl-ol (1), (E)-3-(3,4-dimethoxyphenyl) propenal (2)] and βethers, [1-(3,4-dimethoxyphenyl)-3-hydroxy-2-(2-methoxy- phenoxy)-1-propanone (3), erythiro-1-(3,4-dimethoxyphenyl)-2-(2-methoxyphenoxy)- 1,3-propanediol (4)] have been applied to filter paper and subjected to accelerated photoaging with UV/VIS-light. The changes in optical properties were monitored. In case of all the models, the brightness decreased and the b*-value increased as a result of irradiation, which shows that they are sensitive to light simulating sunlight behind window-glass. In the case of the end group models, the photo-products identified were veratraldehyde and veratric acid together with the Z-isomers of the starting materials. In the case of the cinnamyl alcohol 1, photo-oxidation to the cinnamaldehyde 2 was observed. The irradiation of the αt-carbonylic βether 3 resulted in the homolytic cleavage of the CβO bond and a recombination that led to a β-5 dimer [1-(3,4-dimethoxyphenyl)-3-hydroxy-2-(2-hydroxy-3-methoxyphenyl)- 1-propanone] and a β-1 dimer [1-(3,4-dimethoxyphenyl)-3-hydroxy-2-(4- hydroxy-3-methoxyphenyl)-l-propanone]. The monomeric products veratraldehyde, vanillin, acetoveratrone, and 1-(3,4-dimethoxyphenyl)-3-hydroxy-l-propanone were also formed. The only photoproduct conclusively identified in experiments with the arylglycerol-β-aryl ether 4 was veratraldehyde and most of the starting material was unaffected by the irradiation. The addition of a photosensitizer (acetoveratrone) to this type of model prior to irradiation resulted in some increase in discoloration." @default.
- W2091509406 created "2016-06-24" @default.
- W2091509406 creator A5014034433 @default.
- W2091509406 creator A5014069576 @default.
- W2091509406 creator A5025476574 @default.
- W2091509406 creator A5035648627 @default.
- W2091509406 creator A5081504282 @default.
- W2091509406 date "2004-05-01" @default.
- W2091509406 modified "2023-09-23" @default.
- W2091509406 title "Photoyellowing behavior of non-phenolic lignin models representative of end groups and β-ether structures" @default.
- W2091509406 doi "https://doi.org/10.3183/npprj-2004-19-02-p146-154" @default.
- W2091509406 hasPublicationYear "2004" @default.
- W2091509406 type Work @default.
- W2091509406 sameAs 2091509406 @default.
- W2091509406 citedByCount "2" @default.
- W2091509406 countsByYear W20915094062021 @default.
- W2091509406 countsByYear W20915094062023 @default.
- W2091509406 crossrefType "journal-article" @default.
- W2091509406 hasAuthorship W2091509406A5014034433 @default.
- W2091509406 hasAuthorship W2091509406A5014069576 @default.
- W2091509406 hasAuthorship W2091509406A5025476574 @default.
- W2091509406 hasAuthorship W2091509406A5035648627 @default.
- W2091509406 hasAuthorship W2091509406A5081504282 @default.
- W2091509406 hasConcept C126348684 @default.
- W2091509406 hasConcept C127413603 @default.
- W2091509406 hasConcept C178790620 @default.
- W2091509406 hasConcept C183696295 @default.
- W2091509406 hasConcept C185592680 @default.
- W2091509406 hasConcept C192562407 @default.
- W2091509406 hasConcept C2778092639 @default.
- W2091509406 hasConcept C2780407432 @default.
- W2091509406 hasConcept C2781052789 @default.
- W2091509406 hasConcept C2993208542 @default.
- W2091509406 hasConcept C42360764 @default.
- W2091509406 hasConceptScore W2091509406C126348684 @default.
- W2091509406 hasConceptScore W2091509406C127413603 @default.
- W2091509406 hasConceptScore W2091509406C178790620 @default.
- W2091509406 hasConceptScore W2091509406C183696295 @default.
- W2091509406 hasConceptScore W2091509406C185592680 @default.
- W2091509406 hasConceptScore W2091509406C192562407 @default.
- W2091509406 hasConceptScore W2091509406C2778092639 @default.
- W2091509406 hasConceptScore W2091509406C2780407432 @default.
- W2091509406 hasConceptScore W2091509406C2781052789 @default.
- W2091509406 hasConceptScore W2091509406C2993208542 @default.
- W2091509406 hasConceptScore W2091509406C42360764 @default.
- W2091509406 hasIssue "2" @default.
- W2091509406 hasLocation W20915094061 @default.
- W2091509406 hasOpenAccess W2091509406 @default.
- W2091509406 hasPrimaryLocation W20915094061 @default.
- W2091509406 hasRelatedWork W2018582518 @default.
- W2091509406 hasRelatedWork W2039262972 @default.
- W2091509406 hasRelatedWork W2044380408 @default.
- W2091509406 hasRelatedWork W2049787477 @default.
- W2091509406 hasRelatedWork W2094865530 @default.
- W2091509406 hasRelatedWork W2168140010 @default.
- W2091509406 hasRelatedWork W2377405663 @default.
- W2091509406 hasRelatedWork W4250550036 @default.
- W2091509406 hasRelatedWork W4307943795 @default.
- W2091509406 hasRelatedWork W4377289130 @default.
- W2091509406 hasVolume "19" @default.
- W2091509406 isParatext "false" @default.
- W2091509406 isRetracted "false" @default.
- W2091509406 magId "2091509406" @default.
- W2091509406 workType "article" @default.