Photochemical hole-burning in photosynthetic reaction centers

✍ Scribed by Steven G. Boxer; David J. Lockhart; Thomas R. Middendorf

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 703 KB
• Volume: 123
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(86)80046-x

✦ Synopsis

The change in absorbance (hole spectrum) of the primary electron donor (P870) in bacterial photosynthetic reaction centers has been studied at 1.5-2.1 K following narrow-band excitation at several wavelengths within the P870 absorption band. The hole width is very large, suggesting a homogeneous linewidth on the order of 200-300 cm-'. Possible interpretations of this highly unusual result, including ultra-fast excited-state decay, are discussed.