Carotenoid radical anions and their protonated derivatives

Ali El-Agamey; Ruth Edge; Suppiah Navaratnam; Edward J. Land; T. George Truscott

doi:10.1021/ol061484s

Carotenoid radical anions and their protonated derivatives

Ali El-Agamey, Ruth Edge, Suppiah Navaratnam, Edward J. Land, T. George Truscott

Dalton Nuclear Institute

Research output: Contribution to journal › Article › peer-review

Abstract

In this study, we report the protonation reactions for astaxanthin and canthaxanthin radical anions in methanol, alkaline methanol, and aqueous 2% Triton X-100 at different pH values. The pKa values for the corresponding α-hydroxy radical derivatives of astaxanthin, canthaxanthin, and β-apo-8‘-carotenal were estimated in 2% Triton X-100. Also, the effects of the microenvironment and the structure of the carotenoids on the protonation rate constant are discussed.

Original language	English
Pages (from-to)	4255-4258
Journal	Organic Letters
Volume	8
Issue number	19
DOIs	https://doi.org/10.1021/ol061484s
Publication status	Published - 14 Sept 2006

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title = "Carotenoid radical anions and their protonated derivatives",

abstract = "In this study, we report the protonation reactions for astaxanthin and canthaxanthin radical anions in methanol, alkaline methanol, and aqueous 2% Triton X-100 at different pH values. The pKa values for the corresponding α-hydroxy radical derivatives of astaxanthin, canthaxanthin, and β-apo-8{\textquoteleft}-carotenal were estimated in 2% Triton X-100. Also, the effects of the microenvironment and the structure of the carotenoids on the protonation rate constant are discussed.",

author = "Ali El-Agamey and Ruth Edge and Suppiah Navaratnam and Land, {Edward J.} and Truscott, {T. George}",

year = "2006",

month = sep,

day = "14",

doi = "10.1021/ol061484s",

language = "English",

volume = "8",

pages = "4255--4258",

journal = "Organic Letters",

issn = "1523-7060",

publisher = "American Chemical Society",

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T1 - Carotenoid radical anions and their protonated derivatives

AU - El-Agamey, Ali

AU - Edge, Ruth

AU - Navaratnam, Suppiah

AU - Land, Edward J.

AU - Truscott, T. George

PY - 2006/9/14

Y1 - 2006/9/14

N2 - In this study, we report the protonation reactions for astaxanthin and canthaxanthin radical anions in methanol, alkaline methanol, and aqueous 2% Triton X-100 at different pH values. The pKa values for the corresponding α-hydroxy radical derivatives of astaxanthin, canthaxanthin, and β-apo-8‘-carotenal were estimated in 2% Triton X-100. Also, the effects of the microenvironment and the structure of the carotenoids on the protonation rate constant are discussed.

AB - In this study, we report the protonation reactions for astaxanthin and canthaxanthin radical anions in methanol, alkaline methanol, and aqueous 2% Triton X-100 at different pH values. The pKa values for the corresponding α-hydroxy radical derivatives of astaxanthin, canthaxanthin, and β-apo-8‘-carotenal were estimated in 2% Triton X-100. Also, the effects of the microenvironment and the structure of the carotenoids on the protonation rate constant are discussed.

U2 - 10.1021/ol061484s

DO - 10.1021/ol061484s

M3 - Article

SN - 1523-7060

VL - 8

SP - 4255

EP - 4258

JO - Organic Letters

JF - Organic Letters

IS - 19

ER -

Carotenoid radical anions and their protonated derivatives

Abstract

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