Abstract
Thermal decomposition of 3-(1,4-epidioxy-4-methyl-1,4-dihydro-1-naphthyl)propionic acid ( 2 ) has been used to measure both the physical and chemical quenching rate constants of 1O 2 (k Q and k R, respectively) by water-soluble 8,8′-diapocarotenoids such as crocin ( 1a ) and its derivatives ( 1b , c ). The value of k Q was found to be slightly lower than the diffusion controlled rate constant in all the solvents examined, whereas k R showed strong dependence on the medium, going from ca. 10 8 in H 2O to 10 6 M −1s −1 in DMF and DMSO. These findings suggest that both energy- and electron-transfer mechanisms are involved in the quenching of O 2 ( 1Δ g) by crocinoids.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
