Optical absorption spectra and monomer interaction in polymers: Investigation of exciton coupling in DNA hairpins

被引：8

作者：

Burin, A. L. ^{[1
]}

Dickman, J. A. ^{[1
]}

Uskov, D. B. ^{[1
]}

Hebbard, C. F. F. ^{[1
]}

Schatz, G. C. ^{[2
]}

机构：

[1] Tulane Univ, New Orleans, LA 70118 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2008年 / 129卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2977727

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigate the effect of exciton coupling on the optical absorption spectra of polymer molecules under conditions of strong inhomogeneous broadening. It is shown that the dependence of the maximum in the rescaled absorption spectrum on the number of monomers is determined by their resonant exciton coupling and is insensitive to inhomogeneous broadening. Thus the absorption spectrum can be used to determine optical interactions between monomers. Using our theory and semiempirical calculations we determine exciton coupling between adjacent AT pairs in DNA to be 0.04 eV and discuss exciton localization in DNA hairpins composed of AT pairs. (C) 2008 American Institute of Physics.

引用

页数：4

共 19 条

[1] Circular dichroism spectra of DNA hairpins studied by the Green function method [J].