Exciton localization hierarchy and directed energy transfer in conjugated linear aromatic chains and dendrimeric supermolecules

Stephen F. Swallen; Zhong You Shi; Weihong Tan; Zhifu Xu; Jeffrey S. Moore; Raoul Kopelman

doi:10.1016/S0022-2313(97)00149-X

Exciton localization hierarchy and directed energy transfer in conjugated linear aromatic chains and dendrimeric supermolecules

Stephen F. Swallen, Zhong You Shi, Weihong Tan, Zhifu Xu, Jeffrey S. Moore, Raoul Kopelman

Research output: Contribution to journal › Article › peer-review

Abstract

A unique class of phenylacetylene dendrimer supermolecules have been studied in terms of their electronic absorption and energy-transfer characteristics. Discrete exciton localization on isolated absorbing units within the dendrimer backbone is observed. Due to the branching structure, the vibrationless ground-state absorption is energetically pinned, showing complete independence of absorption energy with changes in molecular size. A simple linear-chain interacting oscillator model is used to calculate the band-edge energies of three isolated linear ring systems: poly(p-phenylenevinylene) (PPV), polytolans, and the dendrimer series. These calculations compare favorably with the experimental data, further illustrating the tight excitation localization.

Original language	English (US)
Pages (from-to)	193-196
Number of pages	4
Journal	Journal of Luminescence
Volume	76-77
DOIs	https://doi.org/10.1016/S0022-2313(97)00149-X
State	Published - Feb 1998

Keywords

Dendrimers
Energy tranfer
Exciton
Localization
Polytolans
PPV

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Atomic and Molecular Physics, and Optics

Online availability

10.1016/S0022-2313(97)00149-X

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@article{07b6361d11ac45cebdcf672a00ed4579,

title = "Exciton localization hierarchy and directed energy transfer in conjugated linear aromatic chains and dendrimeric supermolecules",

abstract = "A unique class of phenylacetylene dendrimer supermolecules have been studied in terms of their electronic absorption and energy-transfer characteristics. Discrete exciton localization on isolated absorbing units within the dendrimer backbone is observed. Due to the branching structure, the vibrationless ground-state absorption is energetically pinned, showing complete independence of absorption energy with changes in molecular size. A simple linear-chain interacting oscillator model is used to calculate the band-edge energies of three isolated linear ring systems: poly(p-phenylenevinylene) (PPV), polytolans, and the dendrimer series. These calculations compare favorably with the experimental data, further illustrating the tight excitation localization.",

keywords = "Dendrimers, Energy tranfer, Exciton, Localization, Polytolans, PPV",

author = "Swallen, {Stephen F.} and Shi, {Zhong You} and Weihong Tan and Zhifu Xu and Moore, {Jeffrey S.} and Raoul Kopelman",

note = "Funding Information: We acknowledge support from the National Science Foundation, Division of Material Sciences. grant DMR-9410709. One of us (J.S.M.) would like to thank the Office of the Naval Research and the National Science Foundation for generous support.",

year = "1998",

month = feb,

doi = "10.1016/S0022-2313(97)00149-X",

language = "English (US)",

volume = "76-77",

pages = "193--196",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier",

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TY - JOUR

T1 - Exciton localization hierarchy and directed energy transfer in conjugated linear aromatic chains and dendrimeric supermolecules

AU - Swallen, Stephen F.

AU - Shi, Zhong You

AU - Tan, Weihong

AU - Xu, Zhifu

AU - Moore, Jeffrey S.

AU - Kopelman, Raoul

N1 - Funding Information: We acknowledge support from the National Science Foundation, Division of Material Sciences. grant DMR-9410709. One of us (J.S.M.) would like to thank the Office of the Naval Research and the National Science Foundation for generous support.

PY - 1998/2

Y1 - 1998/2

N2 - A unique class of phenylacetylene dendrimer supermolecules have been studied in terms of their electronic absorption and energy-transfer characteristics. Discrete exciton localization on isolated absorbing units within the dendrimer backbone is observed. Due to the branching structure, the vibrationless ground-state absorption is energetically pinned, showing complete independence of absorption energy with changes in molecular size. A simple linear-chain interacting oscillator model is used to calculate the band-edge energies of three isolated linear ring systems: poly(p-phenylenevinylene) (PPV), polytolans, and the dendrimer series. These calculations compare favorably with the experimental data, further illustrating the tight excitation localization.

AB - A unique class of phenylacetylene dendrimer supermolecules have been studied in terms of their electronic absorption and energy-transfer characteristics. Discrete exciton localization on isolated absorbing units within the dendrimer backbone is observed. Due to the branching structure, the vibrationless ground-state absorption is energetically pinned, showing complete independence of absorption energy with changes in molecular size. A simple linear-chain interacting oscillator model is used to calculate the band-edge energies of three isolated linear ring systems: poly(p-phenylenevinylene) (PPV), polytolans, and the dendrimer series. These calculations compare favorably with the experimental data, further illustrating the tight excitation localization.

KW - Dendrimers

KW - Energy tranfer

KW - Exciton

KW - Localization

KW - Polytolans

KW - PPV

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U2 - 10.1016/S0022-2313(97)00149-X

DO - 10.1016/S0022-2313(97)00149-X

M3 - Article

AN - SCOPUS:0031998301

SN - 0022-2313

VL - 76-77

SP - 193

EP - 196

JO - Journal of Luminescence

JF - Journal of Luminescence

ER -

Exciton localization hierarchy and directed energy transfer in conjugated linear aromatic chains and dendrimeric supermolecules

Abstract

Keywords

ASJC Scopus subject areas

Online availability

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