Are adenine strands helical H-aggregates?

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Are adenine strands helical H-aggregates?

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Title: Are adenine strands helical H-aggregates?
Author: Hu, Lihong; Zhao, Yang; Wang, Fan; Chen, Guan Hua; Ma, Chensheng; Kwok, Wai Ming; David Lee Phillips
Copyright year: 2007
Abstract: On the basis of our quantum mechanical calculation, we propose that homogeneous single-stranded adenine bases (Ade-DNA) form helical H aggregates, and the photoexcited states can be described as Frenkel excitons. The calculated excitonic coupling between adjacent transition dipoles is in good agreement with the measured absorption spectrum of 20-base homogeneous adenine stacks that exhibits a blue shift of 2.6 nm relative to that of the monomeric species.
Subject: DRNTU::Science::Biological sciences::Biochemistry
Type: Journal Article
Series/ Journal Title: Journal of physical chemistry B
School: School of Materials Science and Engineering
Rights: © 2007 American Chemical Society

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Are adenine strands helical H-aggregates? 453