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- W2548380516 abstract "Solid-state cross-polarization/magic-angle sample-spinning '3C NMR spectra have been recorded on chlorophyll a-water aggregates, methyl pyrochlorophyllide a, and methyl pyropheophorbide a (derivatives that lack a phytyl chain). Spectra have also been collected under a decoupling regime in which resonances of certain hydrogen-bearing car- bon atoms are suppressed. These observations are used to as- sign the solid-state spectra. High-resolution NMR spectroscopy has made very impor- tant contributions to the understanding of chlorophyll func- tion at the molecular level. Not only has NMR been useful in establishing the identity of several chlorophylls of previously unknown structure but it has also provided new insights on the coordination donor-acceptor properties of the chloro- phylls. The latter has contributed significantly to a better un- derstanding of the state of chlorophyll in vivo. The contribu- tions of NMR to chlorophyll studies have been the subject of a recent comprehensive review (1). To acquire high-resolu- tion NMR spectra it has been necessary up to now that these be recorded in the liquid state or in solution, where the chlo- rophylls under investigation have high mobility and can ro- tate freely. However, there are good reasons to suppose that chlorophyll in vivo is largely immobilized, and direct applica- tion of high-resolution NMR by conventional techniques to the state of chlorophyll in vivo has not been practical. New developments in NMR theory and instrumentation now make it possible to obtain useful, high-resolution NMR spec- tra on immobilized (solid) samples (2, 3). Therefore, we have undertaken an investigation of the NMR spectroscopy of chlorophyll in the solid state, with a view to acquiring the basic information necessary for the future applications of solid-state NMR spectroscopy to in vivo or in vivo-like chlo- rophyll systems." @default.
- W2548380516 created "2016-11-11" @default.
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- W2548380516 date "2016-01-01" @default.
- W2548380516 modified "2023-09-27" @default.
- W2548380516 title "Cross-polarization/magic-angle sample-spinning 3C NMR spectroscopic study of chlorophyll a in the solid state (immobilized chlorophyll/chlorophyll-water aggregates/deuterochloropbyll)" @default.
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