Direct observation of ultrafast excimer formation in covalent perylenediimide dimers using near-infrared transient absorption spectroscopy

Kristen E. Brown; Walter A. Salamant; Leah E. Shoer; Ryan M. Young; Michael R. Wasielewski

doi:10.1021/jz5011797

Direct observation of ultrafast excimer formation in covalent perylenediimide dimers using near-infrared transient absorption spectroscopy

Kristen E. Brown, Walter A. Salamant, Leah E. Shoer, Ryan M. Young^*, Michael R. Wasielewski

^*Corresponding author for this work

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

147 Scopus citations

Abstract

Energy transfer in perylene-3,4:9,10-bis(dicarboximide) (PDI) aggregates is often limited by formation of a low-energy excimer state. Formation dynamics of excimer states are often characterized by line shape changes and peak shift dynamics in femtosecond visible transient absorption spectra. Femtosecond near-infrared transient absorption experiments reveal a unique low-energy transition that can be used to identify and characterize this state without overlapping excited singlet-state absorption. Three covalently bound PDI dimers with differing PDI-PDI distances were studied to probe the influence of interchromophore electronic coupling on the PDI excimer transient spectra and dynamics.

Original language	English (US)
Pages (from-to)	2588-2593
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	5
Issue number	15
DOIs	https://doi.org/10.1021/jz5011797
State	Published - Aug 7 2014

Keywords

charge transfer
electronic coupling
femtosecond spectroscopy
molecular aggregates

ASJC Scopus subject areas

Materials Science(all)
Physical and Theoretical Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/jz5011797

Cite this

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title = "Direct observation of ultrafast excimer formation in covalent perylenediimide dimers using near-infrared transient absorption spectroscopy",

abstract = "Energy transfer in perylene-3,4:9,10-bis(dicarboximide) (PDI) aggregates is often limited by formation of a low-energy excimer state. Formation dynamics of excimer states are often characterized by line shape changes and peak shift dynamics in femtosecond visible transient absorption spectra. Femtosecond near-infrared transient absorption experiments reveal a unique low-energy transition that can be used to identify and characterize this state without overlapping excited singlet-state absorption. Three covalently bound PDI dimers with differing PDI-PDI distances were studied to probe the influence of interchromophore electronic coupling on the PDI excimer transient spectra and dynamics.",

keywords = "charge transfer, electronic coupling, femtosecond spectroscopy, molecular aggregates",

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doi = "10.1021/jz5011797",

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journal = "Journal of Physical Chemistry Letters",

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T1 - Direct observation of ultrafast excimer formation in covalent perylenediimide dimers using near-infrared transient absorption spectroscopy

AU - Brown, Kristen E.

AU - Salamant, Walter A.

AU - Shoer, Leah E.

AU - Young, Ryan M.

AU - Wasielewski, Michael R.

PY - 2014/8/7

Y1 - 2014/8/7

N2 - Energy transfer in perylene-3,4:9,10-bis(dicarboximide) (PDI) aggregates is often limited by formation of a low-energy excimer state. Formation dynamics of excimer states are often characterized by line shape changes and peak shift dynamics in femtosecond visible transient absorption spectra. Femtosecond near-infrared transient absorption experiments reveal a unique low-energy transition that can be used to identify and characterize this state without overlapping excited singlet-state absorption. Three covalently bound PDI dimers with differing PDI-PDI distances were studied to probe the influence of interchromophore electronic coupling on the PDI excimer transient spectra and dynamics.

AB - Energy transfer in perylene-3,4:9,10-bis(dicarboximide) (PDI) aggregates is often limited by formation of a low-energy excimer state. Formation dynamics of excimer states are often characterized by line shape changes and peak shift dynamics in femtosecond visible transient absorption spectra. Femtosecond near-infrared transient absorption experiments reveal a unique low-energy transition that can be used to identify and characterize this state without overlapping excited singlet-state absorption. Three covalently bound PDI dimers with differing PDI-PDI distances were studied to probe the influence of interchromophore electronic coupling on the PDI excimer transient spectra and dynamics.

KW - charge transfer

KW - electronic coupling

KW - femtosecond spectroscopy

KW - molecular aggregates

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Direct observation of ultrafast excimer formation in covalent perylenediimide dimers using near-infrared transient absorption spectroscopy

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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