Chlorophyll and pheophytin derivatives in geochemical transformation pathways: A surface-enhanced resonance Raman spectroscopic study

Biospectroscopy Pub Date : 1998-12-07 DOI:10.1002/(SICI)1520-6343(1998)4:3<147::AID-BSPY1>3.0.CO;2-1

Paul S. Woolley, Brendan J. Keely, Ronald E. Hester

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引用次数: 4

Abstract

Protected surface-enhanced resonance Raman spectroscopy (PSERRS) has been used to study a number of chlorophyll transformation products that have been suggested as intermediates in the so-called Treibs hypothesis which describes the transformation of ancient chlorophyll a (chla) in the biosphere into desoxophylloerythroetioporphyrin (DPEP) found in sedimentary environments. Both Soret- and Q_y-resonant PSERR spectra have been recorded, providing two-dimensional structural fingerprints containing a number of bands which enable the presence of specific peripheral substituents to be identified. Some of these marker bands can be assigned directly to vibrational modes of the particular substituents. This has allowed further characterization of the vibrational spectrum of chl a; in particular, a vinyl mode has been identified which previously was thought to be Raman silent. © 1998 John Wiley & Sons, Inc. Biospectroscopy 4: 147–159, 1998

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地球化学转化途径中的叶绿素和叶绿素衍生物:表面增强共振拉曼光谱研究

保护表面增强共振拉曼光谱(PSERRS)已被用于研究一些叶绿素转化产物，这些产物被认为是所谓的Treibs假说中的中间产物，该假说描述了生物圈中古代叶绿素a (chla)转化为沉积环境中发现的去氧叶绿素红卟啉(DPEP)。Soret-和qy -共振PSERR光谱都被记录下来，提供了二维结构指纹，其中包含许多能带，可以识别特定外围取代基的存在。其中一些标记带可以直接指定为特定取代基的振动模式。这使得进一步表征chl a的振动谱成为可能;特别是，已经确定了一种乙烯基模式，以前被认为是拉曼沉默的。©1998 John Wiley &儿子,Inc。生物光谱学学报，2009,32 (2):557 - 557

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Biospectroscopy

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