TY - JOUR
T1 - Exciton dynamics of molecular aggregate systems composed of triangular lattice units
T2 - Structural dependence of exciton-migration and recurrence
AU - Minami, Takuya
AU - Nakano, Masayoshi
AU - Fukui, Hitoshi
AU - Nagai, Hiroshi
AU - Kishi, Ryohei
AU - Takahashi, Hideaki
PY - 2008/10/23
Y1 - 2008/10/23
N2 - The exciton dynamics in molecular aggregate models composed of triangular lattice units have been investigated using the quantum master equation approach including relaxation terms originating in weak exciton-phonon coupling. We observe directed migration and recurrence motion of exciton after the irradiation of a laser field. It is found that the triangular lattice aggregates tend to suppress the decoherence behavior and thus to exhibit more distinguished longer-term exciton recurrence than the similar size dendritic aggregates, although the former show less efficient exciton migration, that is, light-harvesting behavior, than the latter. These dynamical features of exciton in the triangular lattice aggregate models turned out to be characterized by the strong interactions among spatially close-packed monomers through the branching points, originating in the equilateral triangular structure, as well as by the fractal, tournament-like, architecture.
AB - The exciton dynamics in molecular aggregate models composed of triangular lattice units have been investigated using the quantum master equation approach including relaxation terms originating in weak exciton-phonon coupling. We observe directed migration and recurrence motion of exciton after the irradiation of a laser field. It is found that the triangular lattice aggregates tend to suppress the decoherence behavior and thus to exhibit more distinguished longer-term exciton recurrence than the similar size dendritic aggregates, although the former show less efficient exciton migration, that is, light-harvesting behavior, than the latter. These dynamical features of exciton in the triangular lattice aggregate models turned out to be characterized by the strong interactions among spatially close-packed monomers through the branching points, originating in the equilateral triangular structure, as well as by the fractal, tournament-like, architecture.
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U2 - 10.1021/jp805328k
DO - 10.1021/jp805328k
M3 - Article
AN - SCOPUS:55649112512
SN - 1932-7447
VL - 112
SP - 16675
EP - 16681
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 42
ER -