Photo-CIDNP of Photosyntheitc Reaction Centers

McDermott, Ann. E.

Columbia University in the City of New York

关键词: Origin;    14 Solar Energy;    Wavelengths;    Illuminance;    Nmr Spectra;   

DOI  :  10.2172/859107
RP-ID  :  DOE/ER/14508-1
RP-ID  :  FG02-95ER14508
RP-ID  :  859107

美国|英语

来源: UNT Digital Library

【 摘 要 】

Studies of Photochemically Induced Dynamic Nuclear Polarization in Photosynthetic Bacterial Reaction Centers: Wavelength and Time Dependence Solid-state NMR spectra of quinone-reduced photosynthetic bacterial reaction centers (RCs) and chromatophores exhibit certain strongly enhanced lines under illumination, a result of photochemically induced dynamic nuclear polarization (photo-CIDNP). This technique offers a new method to investigate photosynthetic electronic transactions while retaining the NMR advantages of narrow linewidths and site-specific resolution. Pulsed laser illumination at 532 nm was used as the basis for time resolved photo-CIDNP experiments, a technique not previously published for solid-state photosynthetic systems. These measurements offer insight about the origin of the polarization effects.