Chlorophyll-a, radical cation

A further study on the same system at 130 GHz but this time on fully deuterated Photosystem II samples from Synechococcus lividus produced a better resolved spectrum with a much higher signal to noise ratio. This gave further proof that both sets of radicals were produced at all temperatures but with the chlorophyll produced predominantly at the higher temperatures. Measured principal g values of the P-carotenoid were found to be gxx = 2.00335, gyy = 2.00251, gzz = 2.00227 and those for the chlorophyll z were gxx = 2.00312, gyy = 2.00263, gzz = 2.00202, similar to those of the chlorophyll a radical-cation. 

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