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- W2297283886 abstract "We theoretically investigate a possibility that the symmetry of the repetitively branched structure of light-harvesting dendrimers creates the energy gradient descending toward inner generations (layers of pigment molecules) of the dendrimers. In the first half of this paper, we define a model system using the Frenkel exciton Hamiltonian that focuses only on the topology of dendrimers and numerically show that excitation energy tends to gather at inner generations of the model system at a thermal equilibrium state. This indicates that an energy gradient is formed in the model system. In the last half, we attribute this result to the symmetry of the model system and propose two symmetry-origin mechanisms creating the energy gradient. The present analysis and proposition are based on the theory of the linear chain (LC) decomposition [S. Koda, J. Chem. Phys. 142, 204112 (2015)], which equivalently transforms the model system into a set of one-dimensional systems on the basis of the symmetry of dendrimers. In the picture of the LC decomposition, we find that energy gradient is formed both in each linear chain and among linear chains, and these two mechanisms explain the numerical results well." @default.
- W2297283886 created "2016-06-24" @default.
- W2297283886 creator A5079870436 @default.
- W2297283886 date "2016-03-15" @default.
- W2297283886 modified "2023-10-18" @default.
- W2297283886 title "A theoretical investigation of symmetry-origin unidirectional energy gradient in light-harvesting dendrimers" @default.
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- W2297283886 doi "https://doi.org/10.1063/1.4943510" @default.
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