Two-beam polarization studies of the ground and excited state absorption spectra of dimeric chlorophyll

Myśliński, P.; Liu, Yixian; Shen, Yizhong; Koningstein, J. A.

doi:10.1016/0022-2860(91)87134-4

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1992

1993

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“…The 625 nm "dimer" fluorescence was involved importantly in discussions of energy transfer from carotene to Chl by Binnie et al (1985, 1986a), but Binnie et al (1986b) declared it to derive from a residual protochlorophyll impurity, which ended its appearance in the literature. In more recent work, laser-induced dichroism experiments have placed the origin of the Q, transition of the dimer in the 630-640 nm region (Myslinski et al, 1991 ).…”

Section: Introductionmentioning

confidence: 99%

ON THE ORIGIN OF 628 nm FLUORESCENCE IN CERTAIN CHLOROPHYLL PREPARATIONS

Seely¹

1992

Photochem & Photobiology

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A fluorescence band at 628 nm seen in certain preparations of chlorophyll on polyethylene particles swollen with tetradecane comes not from an impurity of protochlorophyll in the original chlorophyll, but from a substance like protochlorophyll formed upon adsorption of chlorophyll to the particles. Much of the chlorophyll is grafted to polyethylene in the same particles by a process that does not affect the chromophore. These and other properties peculiar to the particles are tentatively ascribed to a prior free radical oxidation process in the swollen particles.

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Section: Introductionmentioning

confidence: 99%