Two-exciton states and spectroscopy of phenylacetylene dendrimers

被引：29

作者：

Chernyak, V ^{[1
]}

Poliakov, EY ^{[1
]}

Tretiak, S ^{[1
]}

Mukamel, S ^{[1
]}

机构：

[1] Univ Rochester, Dept Chem, Rochester, NY 14627 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 1999年 / 111卷 / 09期

关键词：

D O I：

10.1063/1.479714

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：

The two-exciton wave functions of conjugated dendrimers with fractal geometries are calculated using the Frenkel-exciton model. Self-similarity and the high degree of symmetry make it possible to express the two-photon spectra of these chromophore aggregates in a compact form using irreducible representations of optical excitations, single-exciton states, and an effective two-exciton transition dipole moment. The explicit calculation of the complete manifold of two-exciton states which involves an expensive l(3)xl(3) diagonalization, l being number of generations, is totally avoided. A real space analysis shows that the two-exciton states and resonances are dominated by periphery chromophores due to their exponentially large number. (C) 1999 American Institute of Physics. [S0021-9606(99)00133-6].

引用

页码：4158 / 4168

页数：11

共 23 条

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[Anonymous], 1982, EXCITONS

[2]

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