Second harmonic generation at a silver electrode in the presence of phthalazine

Voss, David; Nagumo, M.; Goldberg, L. S.; Bunding, K.A.

doi:10.1021/j100400a020

Cited by 20 publications

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“…In this paper, we examine the utility of second harmonic generation (SHG) for such a task. SHG is a nonlinear optical technique that has interfacial specificity, and has been utilized in studies of liquid/solid interfaces. − We investigate the sequential adsorption of anionic and cationic polyelectrolytes on a charged silica surface by monitoring the time dependence of the SHG signal.…”

Section: Introductionmentioning

confidence: 99%

In Situ Investigations of Polyelectrolyte Film Formation by Second Harmonic Generation

and

Goh

1999

J. Phys. Chem. B

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Multilayer films of polyelectrolytes can be prepared by sequential immersion of a charged silica surface into cationic and anionic polyelectrolyte solutions. The formation of such films was investigated using second harmonic generation (SHG), yielding real time information about the in situ adsorption process of each layer within the multilayer film. The SHG results indicate the existence of a fast process (<10 s) that can be ascribed to the initial polymer adsorption to the surface, followed by a slower relaxation due to a change in polyelectrolyte conformation at the surface. The time scale for the reconfiguration varies with the polyelectrolyte.

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Section: Introductionmentioning

confidence: 99%

In Situ Investigations of Polyelectrolyte Film Formation by Second Harmonic Generation

and

Goh

1999

J. Phys. Chem. B

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“…All potentials are vs. the Ag/AgCl (3 mol/l KCI) reference. The cell for the experiments with the Ag electrode has been described previously [3]. The 514.5 nm line of an Ar+ ion laser was focussed to a line on the electrode.…”

Section: Methodsmentioning

confidence: 99%

Surface‐enhanced raman scattering from ethylenediaminetetraacetic acid

Lee

McLennan

Gordon

1987

Ber Bunsenges Phys Chem

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Adsorption J Electrochemistry J Interfaces / Photochemistry Surface-enhanced Raman scattering (SERS) from ethylenediaminetetraacetic acid (EDTA, Na02CCH2N(CH2C02H)CH2CH2N-(CH2C02Na)CH2C02H) on silver and copper electrodes is reported. There is no SERS spectrum observed for EDTA on copper electrodes. The SERS spectrum on silver is very dependent on electrolyte and laser power. In nitrate electrolyte, most of the bands typical of EDTA are observed in the SERS spectra with small wavenumber shifts and small relative intensity changes. In 0.1 mol/l chloride electrolyte the SERS spectra show indication of decarboxylation and are nearly identical to SERS spectra of N,N,N',N'-tetramethylethylenediamine (TMEDA, (CH,)2NCH2CH2N(CH3)2). However, SERS spectra of TMEDA show evidence that TMEDA also reacts. SERS spectra of ethylenediamine-N,N'-diacetic acid show many similar bands to those found in the SERS spectra of TMEDA. Spectroscopy, Ramanthis molecule on copper and silver electrodes with surfaceenhanced Raman scattering (SERS). The results from the silver electrode differ from previously reported results. We find evidence for reaction of EDTA in chloride electrolyte that appears to be a photodecarboxylation involving silver

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“…Surface second harmonic generation has been employed in studies of monolayer photopolymerisation , the formation and reorganisation of monlayer films (Rasing et al, 1988(Rasing et al, , 1985, surface acid and base equilibria (Bhattacharyya et al, 1987, adsorbate orientation (Heinz et al, 1983(Heinz et al, ,1982 Petersen and Hams, 1989; Goh er af., 1988), surface symmetry (Heinz et al, 1985), and electrode processes (Voss et al, 1986). Following the original experiment of Shank and co-workers (1983), the ultrafast response time of the SSHG signal has been used as a probe of surface reaction dynamics on a picosecond timescale Eisenthal, 1988, 1989; Yoshihara, 1989,1990).…”

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confidence: 99%

The Photoreaction of a Rhodamine 6g Monolayer Adsorbed on Quartz Studied by Surface Second Harmonic Generation

Meech¹,

Yoshihara

1991

Photochem Photobiol

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Abstrad-A monolayer of rhodamine 6G on quartz in air exhibited photochemistry upon laser irradiation in the first absorption band. The course of the reaction was followed in real time by the surface second harmonic generation method. It was observed that the photoproduct had an enhanced non-linear coefficient, relative to rhodamine 6G. Absorption spectra showed that this was not a result of a stronger resonance enhancement of the signal by the photoproduct. Consideration of the factors to which the surface second harmonic signal is sensitive suggested that the enhancement arose from an increased charge transfer character of the photoproduct's electronic transitions, and a reorientation of its transition dipole.

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Second harmonic generation at a silver electrode in the presence of phthalazine

Cited by 20 publications

References 0 publications

In Situ Investigations of Polyelectrolyte Film Formation by Second Harmonic Generation

In Situ Investigations of Polyelectrolyte Film Formation by Second Harmonic Generation

Surface‐enhanced raman scattering from ethylenediaminetetraacetic acid

The Photoreaction of a Rhodamine 6g Monolayer Adsorbed on Quartz Studied by Surface Second Harmonic Generation

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