In situ resonance Raman spectroscopic investigation of the tetrathiafulvalene-tetracyanoquinodimethan electrode surface

Wallace, W.; Jaeger, C.D.; Bard, Allen J.

doi:10.1021/ja00511a010

Cited by 26 publications

(8 citation statements)

References 2 publications

(2 reference statements)

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“…Since TCNQ itself is a proposed product (Fqn 1) the Raman spectrum of pure TCNQ powder in a capillary tube was measured with the 476.5 nm line at 5 mW power. This is shown in Figure 2a, and is similar to published spectra of TCNQ measured at 457.9 nm (11) or 488.0 nm (12).…”

Section: Resultssupporting

confidence: 90%

Raman study of the mechanism of electrical switching in Cu TCNQ films

Kamitsos

Tzinis

Risen

1982

Solid State Communications

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Section: Resultssupporting

confidence: 90%

Raman study of the mechanism of electrical switching in Cu TCNQ films

Kamitsos

Tzinis

Risen

1982

Solid State Communications

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“…Ag/Ag+, respectively were assignable to the reduction of neutral TCNQ. 20 The drastic shift of the oxidation peak for the CT complex of 2 results from an electron withdrawing effect of TCNQ. The cyclic voltammetric analysis also confirmed that dithiafulvene unit in 2 was oxidized by TCNQ and neutral dithiafluvene moiety hardly existed.…”

Section: Resultsmentioning

confidence: 99%

Linearly Extended π-Conjugated Dithiafulvene Polymer Formed Soluble Charge-Transfer Complex with 7,7,8,8-Tetracyanoquinodimethane

Naka

Uemura

Chujo

2000

Polym J

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ABSTRACT:A soluble charge-transfer (CT) complex of ff-conjugated donor polymer with 7,7,8,8-tetracyanoquinodimethane (TCNQ) was formed when TCNQ was added to a dimethyl sulfoxide (DMSO) solution of a ll'-conjugated poly(dithiafulvene) (2). In DMSO, 2 reacted with TCNQ to produce a dark green solution. After the precipitated TCNQ was filtered, the filtrate was evaporated to obtain a dark green powder. The resulting CT complex was soluble in acetonitrile, DMSO, N, N-dimethylformamide (DMF), acetone, and MeOH, and partially soluble in tetrahydrofuran (THF). The UV-Vis absorption spectra suggested a formation of the CT complex containing about 1 : 1 ratio of dithiafulvene unit to TCNQ. The UV-Vis absorption and FT-IR analyses indicated that the anion radical ofTCNQ was initially formed by the charge-transfer reaction when TCNQ was added to the solution of 2, and the remaining TCNQ was interacted with 2 as a partially charge-transferred form. In the 1 H NMR spectra, the broad peak attributed to the benzylidene proton of 2 was shifted to a lower magnetic field proportional to the TCNQ feed ratio against the dithiafulvene unit of 2. The CT complex has a conductivity of2 X 10--4 S cm-- The formation of CT complexes by chemical oxidation can be accomplished only if the redox potentials of the donors and acceptors are carefully balanced. The electrical conductivity of the solid state ofTTF-TCNQ along the stacking direction is about three orders of magnitude higher than that in the perpendicular direction, and therefore TTF-TCNQ behaves as a quasi-one-dimensional metal. Such low-dimensional conductors have been predicted by Peierls to undergo a lattice distortion at low temperatures resulting in a metal-insulator transition.

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“…We know that the sensitivity for the roughened electrode is not high enough compared to the other SERS substrates due to the instinctive limitation of the electrochemical oxidation-reduction method. Therefore a large number of investigations [21][22][23][24][25] of surface enhancements from various modified electrodes have been carried out in order to optimize the SERS effect and extend the applied region of electrochemically roughened systems.…”

Section: Introductionmentioning

confidence: 99%

An investigation of the surface-enhanced Raman scattering (SERS) effect from a new substrate of silver-modified silver electrode

Fang

2005

Journal of Colloid and Interface Science

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In situ resonance Raman spectroscopic investigation of the tetrathiafulvalene-tetracyanoquinodimethan electrode surface

Cited by 26 publications

References 2 publications

Raman study of the mechanism of electrical switching in Cu TCNQ films

Raman study of the mechanism of electrical switching in Cu TCNQ films

Linearly Extended π-Conjugated Dithiafulvene Polymer Formed Soluble Charge-Transfer Complex with 7,7,8,8-Tetracyanoquinodimethane

An investigation of the surface-enhanced Raman scattering (SERS) effect from a new substrate of silver-modified silver electrode

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