First Step in Chemical Preparation of Metal Nanogaps Bridged by Thiol End-Capped Molecular Wires

Asger Bjørn Petersen; Erling Thyrhaug; Titoo Jain; Kristine Kilså; Mikael Bols; Kasper Moth-Poulsen; Niels Holger Harrit; Thomas Bjørnholm

doi:10.1021/jp105948v

First Step in Chemical Preparation of Metal Nanogaps Bridged by Thiol End-Capped Molecular Wires

Asger Bjørn Petersen, Erling Thyrhaug, Titoo Jain, Kristine Kilså, Mikael Bols, Kasper Moth-Poulsen, Niels Holger Harrit, Thomas Bjørnholm

Department of Chemistry

8 Citations (Scopus)

Abstract

We present a strategy for chemical preparation of multiple copies of single-molecule electronic devices that is based on chemical self-assembly under equilibrium conditions in aqueous solution. As a first step in the realization of this, we show that thiol end-capped oligo(phenylenevinylene)s (OPVs) can be rendered water-soluble by forming well-defined stoichiometric supramolecular complexes with α-cyclodextrins. On the basis of fluorescence intensity measurements in water, a 1:3 stoichiometry was determined for the complexes with equilibrium constants of the order of 5 - 10^-2 M^-2. The photophysical properties of the OPV3s as free molecules in solution, as nanoaggregates in aqueous suspension, and embedded in cyclodextrins in water, are reported, and the prospects of using these complexes as nucleation sites for growth of gold nanorods bridged by electronically active thiol end-capped molecules is discussed.

Original language	English
Journal	Journal of Physical Chemistry B
Volume	114
Pages (from-to)	11771–11777
ISSN	1520-6106
DOIs	https://doi.org/10.1021/jp105948v
Publication status	Published - 16 Sept 2010

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title = "First Step in Chemical Preparation of Metal Nanogaps Bridged by Thiol End-Capped Molecular Wires",

abstract = "We present a strategy for chemical preparation of multiple copies of single-molecule electronic devices that is based on chemical self-assembly under equilibrium conditions in aqueous solution. As a first step in the realization of this, we show that thiol end-capped oligo(phenylenevinylene)s (OPVs) can be rendered water-soluble by forming well-defined stoichiometric supramolecular complexes with α-cyclodextrins. On the basis of fluorescence intensity measurements in water, a 1:3 stoichiometry was determined for the complexes with equilibrium constants of the order of 5 - 10-2 M-2. The photophysical properties of the OPV3s as free molecules in solution, as nanoaggregates in aqueous suspension, and embedded in cyclodextrins in water, are reported, and the prospects of using these complexes as nucleation sites for growth of gold nanorods bridged by electronically active thiol end-capped molecules is discussed.",

author = "Petersen, {Asger Bj{\o}rn} and Erling Thyrhaug and Titoo Jain and Kristine Kils{\aa} and Mikael Bols and Kasper Moth-Poulsen and Harrit, {Niels Holger} and Thomas Bj{\o}rnholm",

year = "2010",

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day = "16",

doi = "10.1021/jp105948v",

language = "English",

volume = "114",

pages = "11771–11777",

journal = "Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical",

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T1 - First Step in Chemical Preparation of Metal Nanogaps Bridged by Thiol End-Capped Molecular Wires

AU - Petersen, Asger Bjørn

AU - Thyrhaug, Erling

AU - Jain, Titoo

AU - Kilså, Kristine

AU - Bols, Mikael

AU - Moth-Poulsen, Kasper

AU - Harrit, Niels Holger

AU - Bjørnholm, Thomas

PY - 2010/9/16

Y1 - 2010/9/16

N2 - We present a strategy for chemical preparation of multiple copies of single-molecule electronic devices that is based on chemical self-assembly under equilibrium conditions in aqueous solution. As a first step in the realization of this, we show that thiol end-capped oligo(phenylenevinylene)s (OPVs) can be rendered water-soluble by forming well-defined stoichiometric supramolecular complexes with α-cyclodextrins. On the basis of fluorescence intensity measurements in water, a 1:3 stoichiometry was determined for the complexes with equilibrium constants of the order of 5 - 10-2 M-2. The photophysical properties of the OPV3s as free molecules in solution, as nanoaggregates in aqueous suspension, and embedded in cyclodextrins in water, are reported, and the prospects of using these complexes as nucleation sites for growth of gold nanorods bridged by electronically active thiol end-capped molecules is discussed.

AB - We present a strategy for chemical preparation of multiple copies of single-molecule electronic devices that is based on chemical self-assembly under equilibrium conditions in aqueous solution. As a first step in the realization of this, we show that thiol end-capped oligo(phenylenevinylene)s (OPVs) can be rendered water-soluble by forming well-defined stoichiometric supramolecular complexes with α-cyclodextrins. On the basis of fluorescence intensity measurements in water, a 1:3 stoichiometry was determined for the complexes with equilibrium constants of the order of 5 - 10-2 M-2. The photophysical properties of the OPV3s as free molecules in solution, as nanoaggregates in aqueous suspension, and embedded in cyclodextrins in water, are reported, and the prospects of using these complexes as nucleation sites for growth of gold nanorods bridged by electronically active thiol end-capped molecules is discussed.

U2 - 10.1021/jp105948v

DO - 10.1021/jp105948v

M3 - Journal article

C2 - 20726577

SN - 1520-6106

VL - 114

SP - 11771

EP - 11777

JO - Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical

JF - Journal of Physical Chemistry Part B: Condensed Matter, Materials, Surfaces, Interfaces & Biophysical

ER -

First Step in Chemical Preparation of Metal Nanogaps Bridged by Thiol End-Capped Molecular Wires

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