Biochimica et Biophysica Acta (BBA) - Bioenergetics
Hydrogen bonding of water to chlorophyll a and its derivatives as detected by 1H-NMR spectroscopy
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Cited by (12)
Understanding chlorophylls: Central magnesium ion and phytyl as structural determinants
2008, Biochimica et Biophysica Acta - BioenergeticsCitation Excerpt :However, in the absence of central Mg the QX transition shows its “inherent” weak sensitivity to solvent polarity as inferred from the plots drawn for the free bases, provided the effects of H-bonding are excluded. The sensitivity of the QY transition of BChl a to H-bond donors stems from the presence of the C-32 and C-131 carbonyls which may act as acceptors of hydrogen bonds [9,46,55,56]. However, aliphatic alcohols are too weak as H-bond donors to (B)Chls [40,54] to cause significant shifts in the energy of the QY transition in BChl a and BChlide a, observed in the present study.
Interaction of photosynthetic pigments with various organic solvents 2. Application of magnetic circular dichroism to bacteriochlorophyll a and light-harvesting complex 1
2000, Biochimica et Biophysica Acta - BioenergeticsCitation Excerpt :The pigments are functioning in the light-capture and energy-transducing systems and usually are held in proteins, such as, antenna complexes of purple bacteria and reaction centers in green plants and bacteria. It is crucial to understand the nature of the pigments in order to elucidate the mechanism of photosynthesis, and consequently, Chl a and BChl a molecules have been profoundly investigated with various spectroscopic methods: absorption [3–9], infrared and resonance Raman [10–17], X-ray diffraction [1], and nuclear magnetic resonance [18–24]. ( B)Chl a contains a Mg atom in the center of macrocycle, which is coordinated by four pyrrole nitrogens.
Liquid chromatographic separation and mass spectrometric identification of chlorophyll b allomers
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