Kinetic study of photochemical and thermal conversion of bilirubin IX α and its photoproducts
Keyword(s):
A kinetic study of the photochemical and thermal conversion of photoisomers, especialy peaks 0 and 3 [(EE)-bilirubin IX alpha and (EZ)- and (ZE)-bilirubin IX alpha], under anaerobic conditions, was performed by using reversed-phase high-pressure liquid chromatography. Peaks 0 and 3 are spontaneously, photochemically and thermally converted. Short-term photoirradiation of bilirubin gives a mixture containing not only the geometric isomers (EE)-, (EZ)- and (ZE)-bilirubin IX alpha, but also peak 2, (EZ)-cyclobilirubin IX alpha. On prolonged irradiation, cyclization and 15Z leads to 15E isomerization lead to gradual accumulation of two pairs of photoproducts: (EZ)-cyclobilirubin IX alpha A and B and (EE)-cyclobilirubin IX alpha A and B.
1979 ◽
Vol 31
(S1)
◽
pp. 20P-20P
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1977 ◽
Vol 143
(4)
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pp. 383-389
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Keyword(s):
Keyword(s):
2015 ◽
Vol 06
(07)
◽
1979 ◽
Vol 163
(1)
◽
pp. 77-80
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2013 ◽
Vol 61
(47)
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pp. 11347-11354
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