A re-evaluation of the photophysical properties of 1,4-bis(phenylethynyl)benzene: A model for poly(phenyleneethynylene)

A Beeby; K Findlay; PJ Low; TB Marder

doi:10.1021/ja025568h

A re-evaluation of the photophysical properties of 1,4-bis(phenylethynyl)benzene: A model for poly(phenyleneethynylene)

A Beeby, K Findlay, PJ Low, TB Marder

School of Molecular Sciences

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

161 Citations (Web of Science)

Abstract

Photophysical measurements, recorded in aerated cyclohexane at 283 K, indicate that 1,4-bis-(phenylethynyl) benzene behaves in a conventional manner, undergoing emission from the lowest vibrational level of the first excited singlet state; there is no evidence for aggregation of this material in cyclohexane solution in the concentration range (1-250) x 10(-6) mol dm(-3). However, in highly viscous, low-temperature glasses, the material does exhibit inhomogeneous fluorescence behavior, and wavelength-dependent excitation and emission spectra, indicative of a slow rate of relaxation of conformers of the excited states compared to the rate of fluorescence.

Original language	English
Pages (from-to)	8280-8284
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	124
Issue number	28
DOIs	https://doi.org/10.1021/ja025568h
Publication status	Published - 17 Jul 2002

Access to Document

10.1021/ja025568h

Cite this

@article{7195e80a3f574b7fba83ce7109702c7b,

title = "A re-evaluation of the photophysical properties of 1,4-bis(phenylethynyl)benzene: A model for poly(phenyleneethynylene)",

abstract = "Photophysical measurements, recorded in aerated cyclohexane at 283 K, indicate that 1,4-bis-(phenylethynyl) benzene behaves in a conventional manner, undergoing emission from the lowest vibrational level of the first excited singlet state; there is no evidence for aggregation of this material in cyclohexane solution in the concentration range (1-250) x 10(-6) mol dm(-3). However, in highly viscous, low-temperature glasses, the material does exhibit inhomogeneous fluorescence behavior, and wavelength-dependent excitation and emission spectra, indicative of a slow rate of relaxation of conformers of the excited states compared to the rate of fluorescence.",

keywords = "MOLECULAR-STRUCTURE, LIQUID-CRYSTALLINE, TERMINAL ALKYNES, ALLIGATOR CLIPS, COMPLEXES, WIRES, POLY(P-PHENYLENEETHYNYLENE)S, PLANARIZATION, SPECTROSCOPY, ELECTRONICS",

author = "A Beeby and K Findlay and PJ Low and TB Marder",

year = "2002",

month = jul,

day = "17",

doi = "10.1021/ja025568h",

language = "English",

volume = "124",

pages = "8280--8284",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "American Chemical Society",

number = "28",

}

TY - JOUR

T1 - A re-evaluation of the photophysical properties of 1,4-bis(phenylethynyl)benzene

T2 - A model for poly(phenyleneethynylene)

AU - Beeby, A

AU - Findlay, K

AU - Low, PJ

AU - Marder, TB

PY - 2002/7/17

Y1 - 2002/7/17

N2 - Photophysical measurements, recorded in aerated cyclohexane at 283 K, indicate that 1,4-bis-(phenylethynyl) benzene behaves in a conventional manner, undergoing emission from the lowest vibrational level of the first excited singlet state; there is no evidence for aggregation of this material in cyclohexane solution in the concentration range (1-250) x 10(-6) mol dm(-3). However, in highly viscous, low-temperature glasses, the material does exhibit inhomogeneous fluorescence behavior, and wavelength-dependent excitation and emission spectra, indicative of a slow rate of relaxation of conformers of the excited states compared to the rate of fluorescence.

AB - Photophysical measurements, recorded in aerated cyclohexane at 283 K, indicate that 1,4-bis-(phenylethynyl) benzene behaves in a conventional manner, undergoing emission from the lowest vibrational level of the first excited singlet state; there is no evidence for aggregation of this material in cyclohexane solution in the concentration range (1-250) x 10(-6) mol dm(-3). However, in highly viscous, low-temperature glasses, the material does exhibit inhomogeneous fluorescence behavior, and wavelength-dependent excitation and emission spectra, indicative of a slow rate of relaxation of conformers of the excited states compared to the rate of fluorescence.

KW - MOLECULAR-STRUCTURE

KW - LIQUID-CRYSTALLINE

KW - TERMINAL ALKYNES

KW - ALLIGATOR CLIPS

KW - COMPLEXES

KW - WIRES

KW - POLY(P-PHENYLENEETHYNYLENE)S

KW - PLANARIZATION

KW - SPECTROSCOPY

KW - ELECTRONICS

U2 - 10.1021/ja025568h

DO - 10.1021/ja025568h

M3 - Article

SN - 0002-7863

VL - 124

SP - 8280

EP - 8284

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 28

ER -

A re-evaluation of the photophysical properties of 1,4-bis(phenylethynyl)benzene: A model for poly(phenyleneethynylene)

Abstract

Access to Document

Fingerprint

Cite this