Physical Quenching of Singlet Oxygen and cis-trans Isomerization of Carotenoids
β Scribed by WILHELM STAHL; HELMUT SIES
- Book ID
- 119868766
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 399 KB
- Volume
- 691
- Category
- Article
- ISSN
- 0890-6564
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## Abstract The bimolecular rate constants __k__~q~ for quenching of singlet oxygen (^1^Ξ~g~ state) by 26 different natural and novel synthetic carotenoids were determined at 37 Β°C in a mixture of chloroform and ethanol. The steadyβstate technique used involves the generation of ^1^O~2~ by thermal
Addition of singlet oxygen to trans, trans-2,4-hexadiene lH-n.m.r.:6= 1.17 (d, 2CH3), 4.55 (q, tert.H), 5.74 (s, -CH=); 13 C-n. m. r. : 6 = 17.476 (q, CH3), 73.875 (d, tert. C), 128.879 (d, C=C). 8 1 z: colorless oil ; H-n.m. r. : s = 1.23 (t, 2 -CH2-CI13 , J = 6 Hz), 1.28 (d, 1 CH3 > J = 6 Hz), 1.5