Intrachain electron and energy transfer in conjugated organometallic oligomers and polymers

Shawkat Mohammed Aly; Cheuk Lam Ho; Daniel Fortin; Wai Yeung Wong; Alaa S. Abd-El-Aziz; Pierre D. Harvey

doi:10.1002/chem.200800304

Intrachain electron and energy transfer in conjugated organometallic oligomers and polymers

Shawkat Mohammed Aly, Cheuk Lam Ho, Daniel Fortin, Wai Yeung Wong^*, Alaa S. Abd-El-Aziz, Pierre D. Harvey

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

51 Citations (Scopus)

Abstract

The synthesis of polymers of the type (-Cz-C≡C-PtL ₂-C≡C-Cz-X-)_n along with the corresponding model compounds (Ph-PtL′₂-C≡C-Cz)₂-X-, where Cz = 3.3′-carbazole, X = nothing, Cz, or F (2,2′-fluorene), L = PBu ₃, and L′ = PEt₃ are reported. The electronic spectra (absorption, excitation, emission, and ns-transient spectra) and the photophysics of these species in 2-methyltetrahyrofuran (2MeTHF) at 298 and 77 K are presented. Evidence for singlet electron and triplet energy transfer from the Cz chromophore to the F moiety are provided and discussed in detail. The rate for electron transfer is very fast (>4×10¹¹ s ^-1), whereas that for triplet-triplet energy transfer is much slower (≈ 10³s^-1). This work represents a very rare example of studies that address electronic communication in the backbone of a conjugated organometallic polymer.

Original language	English
Pages (from-to)	8341-8352
Number of pages	12
Journal	Chemistry - A European Journal
Volume	14
Issue number	27
DOIs	https://doi.org/10.1002/chem.200800304
Publication status	Published - 19 Sept 2008

Scopus Subject Areas

Catalysis
Organic Chemistry

User-Defined Keywords

Alkynes
Electron transfer
Energy transfer
Fluorene
Metallopolymers
Phosphorescence
Platinum

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10.1002/chem.200800304

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title = "Intrachain electron and energy transfer in conjugated organometallic oligomers and polymers",

abstract = "The synthesis of polymers of the type (-Cz-C≡C-PtL 2-C≡C-Cz-X-)n along with the corresponding model compounds (Ph-PtL′2-C≡C-Cz)2-X-, where Cz = 3.3′-carbazole, X = nothing, Cz, or F (2,2′-fluorene), L = PBu 3, and L′ = PEt3 are reported. The electronic spectra (absorption, excitation, emission, and ns-transient spectra) and the photophysics of these species in 2-methyltetrahyrofuran (2MeTHF) at 298 and 77 K are presented. Evidence for singlet electron and triplet energy transfer from the Cz chromophore to the F moiety are provided and discussed in detail. The rate for electron transfer is very fast (>4×1011 s -1), whereas that for triplet-triplet energy transfer is much slower (≈ 103s-1). This work represents a very rare example of studies that address electronic communication in the backbone of a conjugated organometallic polymer.",

keywords = "Alkynes, Electron transfer, Energy transfer, Fluorene, Metallopolymers, Phosphorescence, Platinum",

author = "Aly, {Shawkat Mohammed} and Ho, {Cheuk Lam} and Daniel Fortin and Wong, {Wai Yeung} and Abd-El-Aziz, {Alaa S.} and Harvey, {Pierre D.}",

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AU - Aly, Shawkat Mohammed

AU - Ho, Cheuk Lam

AU - Fortin, Daniel

AU - Wong, Wai Yeung

AU - Abd-El-Aziz, Alaa S.

AU - Harvey, Pierre D.

PY - 2008/9/19

Y1 - 2008/9/19

N2 - The synthesis of polymers of the type (-Cz-C≡C-PtL 2-C≡C-Cz-X-)n along with the corresponding model compounds (Ph-PtL′2-C≡C-Cz)2-X-, where Cz = 3.3′-carbazole, X = nothing, Cz, or F (2,2′-fluorene), L = PBu 3, and L′ = PEt3 are reported. The electronic spectra (absorption, excitation, emission, and ns-transient spectra) and the photophysics of these species in 2-methyltetrahyrofuran (2MeTHF) at 298 and 77 K are presented. Evidence for singlet electron and triplet energy transfer from the Cz chromophore to the F moiety are provided and discussed in detail. The rate for electron transfer is very fast (>4×1011 s -1), whereas that for triplet-triplet energy transfer is much slower (≈ 103s-1). This work represents a very rare example of studies that address electronic communication in the backbone of a conjugated organometallic polymer.

AB - The synthesis of polymers of the type (-Cz-C≡C-PtL 2-C≡C-Cz-X-)n along with the corresponding model compounds (Ph-PtL′2-C≡C-Cz)2-X-, where Cz = 3.3′-carbazole, X = nothing, Cz, or F (2,2′-fluorene), L = PBu 3, and L′ = PEt3 are reported. The electronic spectra (absorption, excitation, emission, and ns-transient spectra) and the photophysics of these species in 2-methyltetrahyrofuran (2MeTHF) at 298 and 77 K are presented. Evidence for singlet electron and triplet energy transfer from the Cz chromophore to the F moiety are provided and discussed in detail. The rate for electron transfer is very fast (>4×1011 s -1), whereas that for triplet-triplet energy transfer is much slower (≈ 103s-1). This work represents a very rare example of studies that address electronic communication in the backbone of a conjugated organometallic polymer.

KW - Alkynes

KW - Electron transfer

KW - Energy transfer

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KW - Metallopolymers

KW - Phosphorescence

KW - Platinum

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JO - Chemistry - A European Journal

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Intrachain electron and energy transfer in conjugated organometallic oligomers and polymers

Abstract

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