分子聚集体和生物聚合物中的低色性筛选
Screening hypochromism in molecular aggregates and biopolymers.
作者信息
Vekshin N L
机构信息
Institute of Cell Biophysics, Pushchino, Moscow region, 142292 Russia.
出版信息
J Biol Phys. 1999 Dec;25(4):339-54. doi: 10.1023/A:1005178700426.
Abstract
An improved model of the screening effect is suggested. Mutual ≪shielding≫ of chromophores from light due to competition for the incident photon can take place in molecular aggregates and macromolecules. From a common point of view, it could be interpreted as in ≪interaction≫ of the absorption dipol moment transitions. Screening leads to a decrease in the extinction coefficient. The largest decrease is observed in the maximum of the absorption band. This is demonstrated with chromophores of adenine, tyrosine, tryptophan, retinol, porphyrin and anthracene. The model enables prediction of hypochromic spectra or evaluation of the quantity of chromophores in an aggregate or macromolecule.
摘要
提出了一种改进的筛选效应模型。由于对入射光子的竞争，发色团之间的相互“屏蔽”可能发生在分子聚集体和大分子中。从通常的观点来看，这可以解释为吸收偶极矩跃迁的“相互作用”。筛选导致消光系数降低。在吸收带的最大值处观察到最大的降低。用腺嘌呤、酪氨酸、色氨酸、视黄醇、卟啉和蒽的发色团证明了这一点。该模型能够预测减色光谱或评估聚集体或大分子中发色团的数量。
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