Adsorption and film formation of camphor-10-sulfonate at the mercury—solution interface

Philipp, Rosemarie; Retter, U.; Dittrich, Jonas; Müller, E.; Kuschel, Frank

doi:10.1016/0013-4686(87)80002-6

Cited by 34 publications

(10 citation statements)

References 25 publications

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“…(2) in our previous report [26]. However, it is known that the use of the Frumkin isotherm is, in many cases, not adequate to represent the phase transitions [10,12,32,[42][43][44][45][46][47]. The Frumkin isotherm is equivalent to the mean field approximation based on the assumption that the adsorbed molecules in the condensed phase are randomly distributed, although the well-ordered alignment of HV Åþ is more likely on the electrode surface [19,20,22].…”

Section: Isotherm Model To Represent the Phase Transition Behavior Of Hvmentioning

confidence: 98%

Double potential step chronoreflectometry approach to bi-stable potential region of the faradaic phase transition of heptyl viologen at a HOPG electrode

Sagara

Miuchi

2004

Journal of Electroanalytical Chemistry

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Section: Isotherm Model To Represent the Phase Transition Behavior Of Hvmentioning

confidence: 98%

Double potential step chronoreflectometry approach to bi-stable potential region of the faradaic phase transition of heptyl viologen at a HOPG electrode

Sagara

Miuchi

2004

Journal of Electroanalytical Chemistry

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“…This approximation is lately regarded as being not necessarily applicable to the representation of equilibrium phase transition. 19,29,31,[34][35][36][37][38][39][40] The analysis on a basis of a 2D lattice gas model has recently been accepted as being more adequate than the Frumkin model. In the lattice gas model, each molecule is ideally represented as a point or an isotropic sphere.…”

Section: •+mentioning

confidence: 99%

Molecular Structure Dependence of the Phase Transition Spike Response of Viologens at an HOPG Electrode Using Bisviologen and Carboxylated Viologen

Sagara

Fujihara

Tada

2005

J. Electrochem. Soc.

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Behavior of a bisviologen and a carboxylated viologen in their faradaic phase transition at a highly ordered pyrolytic graphite (HOPG) electrode between a gas-like adsorption layer and a two-dimensional condensed phase was studied. Bisviologen (bis-V) possesses two 4,4′ -bipyridinium moieties, and a carboxylated viologen (V-COOH) does carboxyl groups at both terminals of the alkyl chains. The results of the voltammetric measurements were compared with heptyl viologen (HV) with a focus on the intermolecular lateral interaction among radical cations of the viologens in the condensed phase. It was found that the intermolecular attractive interaction between neighboring reduced forms of bis-V is stronger than that of HV, indicating that intermolecular stacking of two radical cation moieties per molecule appears dominant over the negative effect of the possible chance of the presence of out-of-gear molecule pairs due to the mismatch in the neighboring molecule stacking upon the transition. The potential width of the bistable region of the phase transition for V-COOH exceeded 120mV in an acidic medium due to the effective positive contribution of hydrogen bonding to the intermolecular attraction in the condensed phase on the hydrophobic basal plane of the HOPG electrode, while the contribution vanished in a basic medium. These results revealed that the voltammetric spike response of the phase transition can be a direct measure of the strength of two-dimensional intermolecular interaction on the electrode surface. Characteristics of the phase transition behavior of V-COOH were also described in regard to temperature, concentration, and potential sweep rate dependencies. Implications of these characteristics were discussed in consideration of the dynamics of the assembling process of reduced forms of V-COOH into the condensed layer. In the tests of the additives, only trimesic acid among the carboxylic acids used exhibited the activity as a hydrogen bonding inhibitor.

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“…Molecular adsorption at metal electrodes constitutes an important issue in interfacial electrochemistry. [1][2][3][4] Adsorption of organic molecules not only causes mixing of metal-adsorbate orbitals but also changes the electric field in the double layer region.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16] The formation of a two-dimensional layer at mercury electrodes was first reported by Sathyanarayana et al, [17][18][19] who stated that the adsorption is diffusion controlled. 20 Detailed studies of the kinetics of camphor film formation have been conducted by Retter et al 1,[21][22][23][24][25] Camphor adsorption on single crystalline electrodes was reported for bismuth by Paltusova et al who described pronounced adsorption peaks for smooth (111) surfaces. 26,27 Recently, Striegler investigated in detail the adsorption of camphor at single crystalline gold electrodes in various electrolytes using cyclic voltammetry and differential capacity measure-DOI: 10.1039/b110958h…”

Section: Introductionmentioning

confidence: 99%

Organic compound adsorption on Au(111): Simultaneous SHG/electrochemical studies

Pettinger¹,

Danckwerts²,

Krischer³

2002

Faraday Disc.

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Camphor has attracted considerable attention in electrochemical research because it adsorbs strongly on metal surfaces. Due to its surface activity it is able to inhibit surface reactions. Recently, camphor has been used in investigations of nonlinear surface dynamics and pattern formation. Details regarding its influence on the morphology of the metal surface, the significance of surface reconstruction, structural changes in the camphor adlayer and oxide formation remain unclear. We employ second harmonic generation (SHG) to elucidate the structural and electronic behaviour of Au(111) surfaces during camphor adsorption and desorption processes. Our technique allows measurement of the anisotropy of the SHG intensity while simultaneously performing cyclic voltammetry (CV) using the hanging meniscus configuration. The anisotropy data can be refined, yielding the symmetry components of the second order susceptibility tensor chi((2)), which are analysed as a function of external potential and related to the system's electrochemical behaviour. Results of SHG measurements are presented together with corresponding CV data and discussed with respect to the open questions mentioned above

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Adsorption and film formation of camphor-10-sulfonate at the mercury—solution interface

Cited by 34 publications

References 25 publications

Double potential step chronoreflectometry approach to bi-stable potential region of the faradaic phase transition of heptyl viologen at a HOPG electrode

Double potential step chronoreflectometry approach to bi-stable potential region of the faradaic phase transition of heptyl viologen at a HOPG electrode

Molecular Structure Dependence of the Phase Transition Spike Response of Viologens at an HOPG Electrode Using Bisviologen and Carboxylated Viologen

Organic compound adsorption on Au(111): Simultaneous SHG/electrochemical studies

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