OPTICAL SPECTROSCOPY OF A HIGHLY FLUORESCENT AGGREGATE OF BACTERIOCHLOROPHYLL-C
OPTICAL SPECTROSCOPY OF A HIGHLY FLUORESCENT AGGREGATE OF BACTERIOCHLOROPHYLL-C
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DOI：
10.1021/j100123a011
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发表时间：
1993-05-27
影响因子：
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通讯作者：
BLANKENSHIP, RE
中科院分区：
文献类型：
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作者：
CAUSGROVE, TP;CHENG, PL;BLANKENSHIP, RE
细菌叶绿素（BChl）c和一个类似的模型化合物，镁-甲基细菌脱镁叶绿酸d，在非极性溶剂中形成几种类型的聚集体。这些聚集体之一是高荧光的，具有比单体更高的量子产率。这种聚集体也是不寻常的，因为它在某些波长下显示出其荧光发射衰减的上升时间，这归因于聚集体构象的变化。荧光去极化数据的分析与四个或五个单体的线性聚集体或优选三个二聚体的环状排列一致。
Bacteriochlorophyll (BChl) c and a similar model compound, Mg-methyl bacteriopheophorbide d, form several types of aggregates in nonpolar solvents. One of these aggregates is highly fluorescent, with a quantum yield higher than that of the monomer. This aggregate is also unusual in that it shows a rise time in its fluorescence emission decay at certain wavelengths, which is ascribed to a change in conformation of the aggregate. An analysis of fluorescence depolarization data is consistent with either a linear aggregate of four or five monomers or preferably a cyclic arrangement of three dimers.