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Langmuir – Blodgett films incorporating molecular wire candidates of ester-substituted oligo(phenylene – ethynylene) derivatives

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Langmuir – Blodgett films incorporating molecular wire candidates of ester-substituted oligo(phenylene – ethynylene) derivatives. / Villares, Ana; Lydon, Donocadh; Low, Paul et al.
In: Surface Science, Vol. 602, No. 24, 15.12.2008, p. 3683-3687.

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Villares A, Lydon D, Low P, Robinson B, Ashwell G, Royo F et al. Langmuir – Blodgett films incorporating molecular wire candidates of ester-substituted oligo(phenylene – ethynylene) derivatives. Surface Science. 2008 Dec 15;602(24):3683-3687. doi: 10.1016/j.susc.2008.10.004

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Villares, Ana ; Lydon, Donocadh ; Low, Paul et al. / Langmuir – Blodgett films incorporating molecular wire candidates of ester-substituted oligo(phenylene – ethynylene) derivatives. In: Surface Science. 2008 ; Vol. 602, No. 24. pp. 3683-3687.

Bibtex

@article{7890a4bd902b4a12b6637dd245052d0b,
title = "Langmuir – Blodgett films incorporating molecular wire candidates of ester-substituted oligo(phenylene – ethynylene) derivatives",
abstract = "Langmuir and Langmuir–Blodgett (LB) films of two “wire-like” oligo(phenylene–ethynylene) methyl ester derivatives, namely methyl-4-[(4″-(nonyloxyphenylethynyl)-4′-(phenylethynyl)]-benzoate and methyl-4-[(4″-hexadecyloxyphenylethynyl)-4′-(phenylethynyl]-benzoate (abbreviated as C9BPEB and C16BPEB), have been prepared and characterized. Surface pressure isotherms for both materials have been obtained, with C9BPEB showing more expanded monolayers. An analysis of the reflection spectra of monolayer films at the air–water interface suggests the formation of H-aggregates, and supports an organizational model in which tilt angles of C16BPEB and C9BPEB molecules with respect to the water surface are approximately 70° and 60°, respectively. The sequential transfer of monolayers of these BPEB ester derivatives onto solid substrates results in a Z-type deposition in the case of C9BPEB and Y-type for C16BPEB. The current–voltage (I–V) characteristics of LB monolayers are relatively symmetrical for both films, with the asymmetric contacts more evident in the I–V C16BPEB characteristics.",
keywords = "Langmuir films, Langmuir–Blodgett films , UV–vis reflection spectroscopy , Scanning tunneling microscopy , Molecular wires",
author = "Ana Villares and Donocadh Lydon and Paul Low and Benjamin Robinson and Geoff Ashwell and Felix Royo and Cea Pilar",
year = "2008",
month = dec,
day = "15",
doi = "10.1016/j.susc.2008.10.004",
language = "English",
volume = "602",
pages = "3683--3687",
journal = "Surface Science",
issn = "0039-6028",
publisher = "Elsevier",
number = "24",

}

RIS

TY - JOUR

T1 - Langmuir – Blodgett films incorporating molecular wire candidates of ester-substituted oligo(phenylene – ethynylene) derivatives

AU - Villares, Ana

AU - Lydon, Donocadh

AU - Low, Paul

AU - Robinson, Benjamin

AU - Ashwell, Geoff

AU - Royo, Felix

AU - Pilar, Cea

PY - 2008/12/15

Y1 - 2008/12/15

N2 - Langmuir and Langmuir–Blodgett (LB) films of two “wire-like” oligo(phenylene–ethynylene) methyl ester derivatives, namely methyl-4-[(4″-(nonyloxyphenylethynyl)-4′-(phenylethynyl)]-benzoate and methyl-4-[(4″-hexadecyloxyphenylethynyl)-4′-(phenylethynyl]-benzoate (abbreviated as C9BPEB and C16BPEB), have been prepared and characterized. Surface pressure isotherms for both materials have been obtained, with C9BPEB showing more expanded monolayers. An analysis of the reflection spectra of monolayer films at the air–water interface suggests the formation of H-aggregates, and supports an organizational model in which tilt angles of C16BPEB and C9BPEB molecules with respect to the water surface are approximately 70° and 60°, respectively. The sequential transfer of monolayers of these BPEB ester derivatives onto solid substrates results in a Z-type deposition in the case of C9BPEB and Y-type for C16BPEB. The current–voltage (I–V) characteristics of LB monolayers are relatively symmetrical for both films, with the asymmetric contacts more evident in the I–V C16BPEB characteristics.

AB - Langmuir and Langmuir–Blodgett (LB) films of two “wire-like” oligo(phenylene–ethynylene) methyl ester derivatives, namely methyl-4-[(4″-(nonyloxyphenylethynyl)-4′-(phenylethynyl)]-benzoate and methyl-4-[(4″-hexadecyloxyphenylethynyl)-4′-(phenylethynyl]-benzoate (abbreviated as C9BPEB and C16BPEB), have been prepared and characterized. Surface pressure isotherms for both materials have been obtained, with C9BPEB showing more expanded monolayers. An analysis of the reflection spectra of monolayer films at the air–water interface suggests the formation of H-aggregates, and supports an organizational model in which tilt angles of C16BPEB and C9BPEB molecules with respect to the water surface are approximately 70° and 60°, respectively. The sequential transfer of monolayers of these BPEB ester derivatives onto solid substrates results in a Z-type deposition in the case of C9BPEB and Y-type for C16BPEB. The current–voltage (I–V) characteristics of LB monolayers are relatively symmetrical for both films, with the asymmetric contacts more evident in the I–V C16BPEB characteristics.

KW - Langmuir films

KW - Langmuir–Blodgett films

KW - UV–vis reflection spectroscopy

KW - Scanning tunneling microscopy

KW - Molecular wires

U2 - 10.1016/j.susc.2008.10.004

DO - 10.1016/j.susc.2008.10.004

M3 - Journal article

VL - 602

SP - 3683

EP - 3687

JO - Surface Science

JF - Surface Science

SN - 0039-6028

IS - 24

ER -