Alignment of conjugated polymers in a nematic liquid-crystal host

Karolina P. Fritz; Gregory D. Scholes

doi:10.1021/jp0347872

Alignment of conjugated polymers in a nematic liquid-crystal host

Karolina P. Fritz, Gregory D. Scholes

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

37 Scopus citations

Abstract

A general procedure, solvent-induced homogeneous dispersion, SIHD, is presented to incorporate and align conjugated polymers into a nematic liquid-crystal host. We report the investigation of the dye, N′,N′-bis(2,6 dimethylphenyl)-3,4,9,10, perylenetetracarboxylic dimide (PERY), and a conjugated polymer, poly[2-(2′ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV), aligned in a low molecular weight nematic liquid-crystal matrix, 4-n-pentyl-4′-cyanobiphenyl (5CB). Order parameters obtained for the guests from polarized absorption and fluorescence spectra are 0.46, 0.24, and 0.30 for PERY, MEH-PPV (M_n = 8.6 × 10⁴), and MEH-PPV (M_n = 1.1 × 10⁵) in 5CB, respectively. The liquid-crystal host provides a unique environment in which to study the conjugated polymer in a highly extended conformation. To this end, we discuss the relationship between polymer conformation and fluorescence, the line shape of the spectra, and the interchromophore/interchain versus intrachromophore/intrachain resonance energy transfer processes.

Original language	English (US)
Pages (from-to)	10141-10147
Number of pages	7
Journal	Journal of Physical Chemistry B
Volume	107
Issue number	37
DOIs	https://doi.org/10.1021/jp0347872
State	Published - Sep 18 2003
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Alignment of conjugated polymers in a nematic liquid-crystal host",

abstract = "A general procedure, solvent-induced homogeneous dispersion, SIHD, is presented to incorporate and align conjugated polymers into a nematic liquid-crystal host. We report the investigation of the dye, N′,N′-bis(2,6 dimethylphenyl)-3,4,9,10, perylenetetracarboxylic dimide (PERY), and a conjugated polymer, poly[2-(2′ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV), aligned in a low molecular weight nematic liquid-crystal matrix, 4-n-pentyl-4′-cyanobiphenyl (5CB). Order parameters obtained for the guests from polarized absorption and fluorescence spectra are 0.46, 0.24, and 0.30 for PERY, MEH-PPV (Mn = 8.6 × 104), and MEH-PPV (Mn = 1.1 × 105) in 5CB, respectively. The liquid-crystal host provides a unique environment in which to study the conjugated polymer in a highly extended conformation. To this end, we discuss the relationship between polymer conformation and fluorescence, the line shape of the spectra, and the interchromophore/interchain versus intrachromophore/intrachain resonance energy transfer processes.",

author = "Fritz, {Karolina P.} and Scholes, {Gregory D.}",

year = "2003",

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doi = "10.1021/jp0347872",

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AU - Fritz, Karolina P.

AU - Scholes, Gregory D.

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Y1 - 2003/9/18

N2 - A general procedure, solvent-induced homogeneous dispersion, SIHD, is presented to incorporate and align conjugated polymers into a nematic liquid-crystal host. We report the investigation of the dye, N′,N′-bis(2,6 dimethylphenyl)-3,4,9,10, perylenetetracarboxylic dimide (PERY), and a conjugated polymer, poly[2-(2′ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV), aligned in a low molecular weight nematic liquid-crystal matrix, 4-n-pentyl-4′-cyanobiphenyl (5CB). Order parameters obtained for the guests from polarized absorption and fluorescence spectra are 0.46, 0.24, and 0.30 for PERY, MEH-PPV (Mn = 8.6 × 104), and MEH-PPV (Mn = 1.1 × 105) in 5CB, respectively. The liquid-crystal host provides a unique environment in which to study the conjugated polymer in a highly extended conformation. To this end, we discuss the relationship between polymer conformation and fluorescence, the line shape of the spectra, and the interchromophore/interchain versus intrachromophore/intrachain resonance energy transfer processes.

AB - A general procedure, solvent-induced homogeneous dispersion, SIHD, is presented to incorporate and align conjugated polymers into a nematic liquid-crystal host. We report the investigation of the dye, N′,N′-bis(2,6 dimethylphenyl)-3,4,9,10, perylenetetracarboxylic dimide (PERY), and a conjugated polymer, poly[2-(2′ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV), aligned in a low molecular weight nematic liquid-crystal matrix, 4-n-pentyl-4′-cyanobiphenyl (5CB). Order parameters obtained for the guests from polarized absorption and fluorescence spectra are 0.46, 0.24, and 0.30 for PERY, MEH-PPV (Mn = 8.6 × 104), and MEH-PPV (Mn = 1.1 × 105) in 5CB, respectively. The liquid-crystal host provides a unique environment in which to study the conjugated polymer in a highly extended conformation. To this end, we discuss the relationship between polymer conformation and fluorescence, the line shape of the spectra, and the interchromophore/interchain versus intrachromophore/intrachain resonance energy transfer processes.

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Alignment of conjugated polymers in a nematic liquid-crystal host

Abstract

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