Adsorption of acridine on silver electrode: SERS spectra potential dependence as a probe of adsorbate state

Solovyeva, Elena V.; Myund, L. A.; Dem’yanchuk, Evgeniya M.; Макаров, А. А.; Denisova, A. S.

doi:10.1016/j.molstruc.2012.09.001

Cited by 10 publications

(10 citation statements)

References 18 publications

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“…In order to get more information about the contributions of the electromagnetic resonance and the electronic structure of molecule to the enhancement of BHIA Raman spectrum, the investigation of SERS spectra at different excitation wavelengths may be carried out. The SERS spectrum of BHIA resembles the one of acridine [29]. As in the normal Raman, all main spectral components observed are similar for both substances.…”

Section: Resultsmentioning

confidence: 52%

“…For all bands the shifts of their positions compared to the normal Raman spectrum are non-significant, and lay within the range of 6-9 cm À1 . As well as the acridine molecule [29], BHIA may exist both as non-protonated and protonated species adsorbed on the surface. The most significant differences for both species are observed for the shoulder at 1402 cm À1 and the band at 1584 cm…”

Section: Resultsmentioning

confidence: 99%

“…The hypothetical adsorption model with the key role of lone electron pair of the nitrogen atom in the heterocycle was considered for pyridine [22][23][24][25] and phenanthroline [26][27][28]. In the case of acridine the type of SERS spectra dependence on electrode potential [29] and stability of the SERS spectrum of protonated form over time [29][30][31] suggest that the conjugate aromatic system takes an important part in the adsorption process along with the lone electron pair. This fact stimulates an interest to investigation of the adsorption of acridine derivatives with bulky substituents near the nitrogen atom.…”

Section: Introductionmentioning

confidence: 99%

“…It should be emphasized that the behavior of non-protonated form of acridine over the change of the electrode potential is quite different. According to [29], the intensity of the acridine spectrum components remains nearly unchanged over the shift of potential to more negative values. In contrast to the acridine desorption, the desorption of non-protonated BHIA molecules occurs because their direct interaction with the surface via the lone electron pair of nitrogen atom becomes impossible.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Surface enhanced Raman scattering of new acridine based fluorophore adsorbed on silver electrode

Solovyeva

Myund

Denisova

2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Surface enhanced Raman scattering of new acridine based fluorophore adsorbed on silver electrode

Solovyeva

Myund

Denisova

2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…A hybrid optical/electrochemical setup with an electrode as an active substrate is one of the most informative technique because it allows to control the surface potential, which influences the adsorbate orientation and the charge transfer processes . The dependence of SERS spectra on the electrode potential also reflects a change in the composition and the structure of the electrical double layer . In particular, investigation of molecules adsorption by SERS electrochemical technique is highly informative for biologically relevant substances for which the potential at an interface (e.g., at a living cell membrane) is a significant parameter in the processes of their transportation or transmembrane penetration.…”

Section: Introductionmentioning

confidence: 99%

SERS investigation of neocuproine adsorption on silver: Influence of electrode potential on methyl groups

Solovyeva

Rakhimbekova

Lanchuk

et al. 2017

J Raman Spectroscopy

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Study of molecules adsorption on charged surfaces is important for biologically relevant substances where the potential at the interface such as living cell membrane is a significant parameter in the processes of their transportation or transmembrane penetration. In this work, a hybrid optical/electrochemical surface‐enhanced Raman scattering (SERS) technique was applied to get new insight into the adsorption state and conformational equilibrium of neocuproine, which serves as a nucleic acid biosensor in clinical diagnostics and has biological activity towards several types of carcinoma. The density functional theory calculations performed for several rotational conformations and their anion radicals were used to determine the geometrical and energetic characteristics, to evaluate the rotational barrier, to obtain the vibrational assignment, and to consider the metal‐adsorbate charge transfer. The dependence of SERS spectra on surface potential is ascribed to a change of the rotational dynamics of methyl groups from hindered to almost free at potentials ≤−200 mV. It is demonstrated for the first time that SERS spectroscopy is capable to recognize the surface species, which differ in the methyl group internal rotation.

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Surface‐enhanced Raman scattering of 4,4'‐diaminostilbene: Dependence of spectral features and resonant enhancement on surface coverage

Solovyeva

2019

J Raman Spectroscopy

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At any applications of surface‐enhanced Raman scattering (SERS) spectroscopy, from detection of small ions to recognition of large biological molecules, an understanding the spectral profiles and its transformation occurring under changes of local environment is an important stage essential for a reliable chemical analysis. In this work, we showed that the adsorption of 4,4'‐diaminostilbene on Ag nanoparticles is accompanied by a dramatic change in the SERS profile observed at transition from submonolayer to multilayer coverage. A profile deconvolution analysis allowed revealing the spectral signatures inherent for the surface species existing at submonolayer and multilayer adsorption corresponding to the hot spots and ordinary conditions, respectively. A resonance character of Raman enhancement was detected in the case of 4,4'‐diaminostilbene adsorbed in hot spots regions. A feasibility of ligand to metal charge transfer was proved on the basis of ultraviolet–visible data. The overtones and combination bands were observed in the SERS spectra at resonance conditions. The spectral signatures of the molecules inside and outside hot spots regions were assigned. A considerable activation of rings vibrations together with a suppression of ethylenic bridge vibrations was revealed in both cases. The most prominent features of 4,4'‐diaminostilbene linked with two Ag nanoparticles in the range 200–1,800 cm‐1 are the medium bands at 581 and 1249 cm‐1 corresponding to CCC bending and C–N stretching modes, respectively. The obtained results can serve as a basis for development of new powerful Raman techniques for evaluation of surface coverage and “hot spots mapping,” which are of great interest for surface science and plasmonics.

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Adsorption of acridine on silver electrode: SERS spectra potential dependence as a probe of adsorbate state

Cited by 10 publications

References 18 publications

Surface enhanced Raman scattering of new acridine based fluorophore adsorbed on silver electrode

Surface enhanced Raman scattering of new acridine based fluorophore adsorbed on silver electrode

SERS investigation of neocuproine adsorption on silver: Influence of electrode potential on methyl groups

Surface‐enhanced Raman scattering of 4,4'‐diaminostilbene: Dependence of spectral features and resonant enhancement on surface coverage

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