FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4200054050> ?p ?o ?g. }

• W4200054050 endingPage "110051" @default.
• W4200054050 startingPage "110051" @default.
• W4200054050 abstract "Flavonoid yellows are historical dyes widely found in cultural heritage, in particular those based on the glycosides of luteolin, quercetin and kaempferol. In this research, for the first time, the photodegradation quantum yields (ΦR) were calculated for luteolin, quercetin and kaempferol as well as their glycosides Lut-7-O-Glc, Que-3-O-Glr, Kaem-3-O-Glc and compared to the reactivity of eriodictyol. The results are discussed within the current state of the art on the mechanisms of degradation for these antioxidant compounds, which are reviewed in the introduction. ΦR values were obtained in solution irradiating at 313 nm and 366 nm, providing the quantification of the stability of flavonoid yellows. In particular, by irradiating at 366 nm, a very good stability scale is obtained, with ΦR values for luteolin and the 3-O-glycosides of quercetin and kaempferol on the order of 10−6. The more reactive quercetin and kaempferol are characterized by ΦR values of ca. 3 × 10−5. The relative stability of these yellows can be explained by a photoprotective mechanism based on excited state proton transfer, which is more efficient when there is an OH in the C5 position. In addition, electron transfer, and consequently oxidation, is also enhanced through the OH in position C3 when compared to C5. Solvents effects were also studied and to mimic the environment of the dye in wool, irradiation at 366 nm in a proteinaceous gel was carried out. In this gel, the ΦR values increased for all the molecules studied, reaching 1 × 10−4 and 2 × 10−4 for kaempferol and quercetin, respectively. This drastic enhancement shows that the environment has a major impact on stability. The main degradation products were also studied by irradiation with a xenon source (λirr ≥ 300 nm), and characterized by HPLC-DAD-MS and LC-HRMS/MS. These data, on the reaction mechanism, show that the double bond between C2 and C3, in the C ring, is the most reactive point of the molecules, as in all the flavonoids degradation started by solvent attack, followed in some cases by ring opening and the formation of low molecular weight hydroxyl compounds such as benzoic acids, in agreement with the general reaction scheme proposed in literature." @default.
• W4200054050 created "2021-12-31" @default.
• W4200054050 creator A5033852296 @default.
• W4200054050 creator A5051527135 @default.
• W4200054050 creator A5083981406 @default.
• W4200054050 creator A5087444351 @default.
• W4200054050 creator A5087861336 @default.
• W4200054050 date "2022-03-01" @default.
• W4200054050 modified "2023-10-18" @default.
• W4200054050 title "Photoreactivity and stability of flavonoid yellows used in cultural heritage" @default.
• W4200054050 cites W1969249329 @default.
• W4200054050 cites W1972929574 @default.
• W4200054050 cites W1979891411 @default.
• W4200054050 cites W1980980562 @default.
• W4200054050 cites W1988757990 @default.
• W4200054050 cites W1993323069 @default.
• W4200054050 cites W2002460013 @default.
• W4200054050 cites W2003297876 @default.
• W4200054050 cites W2003620214 @default.
• W4200054050 cites W2007298995 @default.
• W4200054050 cites W2012325049 @default.
• W4200054050 cites W2021472683 @default.
• W4200054050 cites W2024514401 @default.
• W4200054050 cites W2034025093 @default.
• W4200054050 cites W2055994981 @default.
• W4200054050 cites W2061462897 @default.
• W4200054050 cites W2064581945 @default.
• W4200054050 cites W2065233162 @default.
• W4200054050 cites W2068735167 @default.
• W4200054050 cites W2069981925 @default.
• W4200054050 cites W2077684925 @default.
• W4200054050 cites W2081688458 @default.
• W4200054050 cites W2086966815 @default.
• W4200054050 cites W2093482879 @default.
• W4200054050 cites W2142418855 @default.
• W4200054050 cites W2146506756 @default.
• W4200054050 cites W2152324441 @default.
• W4200054050 cites W2171565220 @default.
• W4200054050 cites W2290893956 @default.
• W4200054050 cites W2318301258 @default.
• W4200054050 cites W2338210782 @default.
• W4200054050 cites W2508924143 @default.
• W4200054050 cites W2567903256 @default.
• W4200054050 cites W2572091328 @default.
• W4200054050 cites W2573556193 @default.
• W4200054050 cites W2800431141 @default.
• W4200054050 cites W2804293992 @default.
• W4200054050 cites W2909814816 @default.
• W4200054050 cites W2913602745 @default.
• W4200054050 cites W2992130234 @default.
• W4200054050 cites W3000990590 @default.
• W4200054050 cites W3008570797 @default.
• W4200054050 cites W3104531716 @default.
• W4200054050 cites W3118732957 @default.
• W4200054050 cites W3150627397 @default.
• W4200054050 doi "https://doi.org/10.1016/j.dyepig.2021.110051" @default.
• W4200054050 hasPublicationYear "2022" @default.
• W4200054050 type Work @default.
• W4200054050 citedByCount "7" @default.
• W4200054050 countsByYear W42000540502022 @default.
• W4200054050 countsByYear W42000540502023 @default.
• W4200054050 crossrefType "journal-article" @default.
• W4200054050 hasAuthorship W4200054050A5033852296 @default.
• W4200054050 hasAuthorship W4200054050A5051527135 @default.
• W4200054050 hasAuthorship W4200054050A5083981406 @default.
• W4200054050 hasAuthorship W4200054050A5087444351 @default.
• W4200054050 hasAuthorship W4200054050A5087861336 @default.
• W4200054050 hasConcept C13965031 @default.
• W4200054050 hasConcept C155647269 @default.
• W4200054050 hasConcept C178790620 @default.
• W4200054050 hasConcept C185592680 @default.
• W4200054050 hasConcept C194671627 @default.
• W4200054050 hasConcept C2776080593 @default.
• W4200054050 hasConcept C2777810353 @default.
• W4200054050 hasConcept C2778004101 @default.
• W4200054050 hasConcept C2779054382 @default.
• W4200054050 hasConcept C2781263971 @default.
• W4200054050 hasConcept C75473681 @default.
• W4200054050 hasConceptScore W4200054050C13965031 @default.
• W4200054050 hasConceptScore W4200054050C155647269 @default.
• W4200054050 hasConceptScore W4200054050C178790620 @default.
• W4200054050 hasConceptScore W4200054050C185592680 @default.
• W4200054050 hasConceptScore W4200054050C194671627 @default.
• W4200054050 hasConceptScore W4200054050C2776080593 @default.
• W4200054050 hasConceptScore W4200054050C2777810353 @default.
• W4200054050 hasConceptScore W4200054050C2778004101 @default.
• W4200054050 hasConceptScore W4200054050C2779054382 @default.
• W4200054050 hasConceptScore W4200054050C2781263971 @default.
• W4200054050 hasConceptScore W4200054050C75473681 @default.
• W4200054050 hasLocation W42000540501 @default.
• W4200054050 hasOpenAccess W4200054050 @default.
• W4200054050 hasPrimaryLocation W42000540501 @default.
• W4200054050 hasRelatedWork W2077900998 @default.
• W4200054050 hasRelatedWork W2081508818 @default.
• W4200054050 hasRelatedWork W2088441846 @default.
• W4200054050 hasRelatedWork W2360044922 @default.
• W4200054050 hasRelatedWork W2375715666 @default.
• W4200054050 hasRelatedWork W2379722270 @default.

• next