title: Are adenine strands helical H-aggregates?
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.
authors: Department of Chemistry and Centre of Theoretical and Computational Physics, University of Hong Kong, Hong Kong, PR China.
authors: Lihong
authors: L
authors: Hu
authors: Yang
authors: Y
authors: Zhao
authors: Fan
authors: F
authors: Wang
authors: GuanHua
authors: G
authors: Chen
authors: Chensheng
authors: C
authors: Ma
authors: Wai-Ming
authors: WM
authors: Kwok
authors: David Lee
authors: DL
authors: Phillips
mesh_terms: D009690:Nucleic Acid Conformation; D011061:Poly A / Q000737:chemistry*; D013053:Spectrophotometry
chemical_list: D011061:Poly A; C015465:poly(dA)