Ultrafast transient absorption spectroscopy: principles and application to photosynthetic systems.

Ultrafast transient absorption spectroscopy: principles and application to photosynthetic systems.
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DOI:
10.1007/s11120-009-9454-y
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发表时间:
2009-08
影响因子:
3.7
通讯作者:
Kennis, John T. M.
Kennis, John T. M.
中科院分区:
生物学3区
文献类型:
--
作者:
Berera, Rudi;van Grondelle, Rienk;Kennis, John T. M.

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The photophysical and photochemical reactions, after light absorption by a photosynthetic pigment–protein complex, are among the fastest events in biology, taking place on timescales ranging from tens of femtoseconds to a few nanoseconds. The advent of ultrafast laser systems that produce pulses with femtosecond duration opened up a new area of research and enabled investigation of these photophysical and photochemical reactions in real time. Here, we provide a basic description of the ultrafast transient absorption technique, the laser and wavelength-conversion equipment, the transient absorption setup, and the collection of transient absorption data. Recent applications of ultrafast transient absorption spectroscopy on systems with increasing degree of complexity, from biomimetic light-harvesting systems to natural light-harvesting antennas, are presented. In particular, we will discuss, in this educational review, how a molecular understanding of the light-harvesting and photoprotective functions of carotenoids in photosynthesis is accomplished through the application of ultrafast transient absorption spectroscopy.
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