Surface enhanced Raman scattering of 2,2′ biquinoline adsorbed on colloidal silver particles

Chowdhury, Joydeep; Ghosh, Manas; Misra, T. N.

doi:10.1016/s1386-1425(00)00263-8

Cited by 80 publications

(62 citation statements)

References 32 publications

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“…It is now well established that on the silver colloidal surface, maximum enhancement of the Raman signal is observed when a monolayer of the adsorbate molecule is formed on the surface and that as multilayers are formed the SERS signal decreases. 8,9 This conjecture assumes that the orientation of the adsorbate molecules does not change with the surface coverage and the predicted behaviour holds for all the SERS bands.…”

Section: Concentration-dependent Sers Spectra Of Isomeric Bpsmentioning

confidence: 99%

Adsorption of 3‐ and 4‐benzoylpyridine on colloidal silver particles: a surface‐enhanced Raman scattering study

Chowdhury

Ghosh

2004

J Raman Spectroscopy

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Surface-enhanced Raman scattering (SERS) spectra of 3-and 4-benzoylpyridine (BP) adsorbed on silver hydrosols were compared with the FTIR and normal Raman spectra in bulk and in solution. With a small fractional change in adsorbate concentration, the SER spectra of isomeric BPs show significant changes in their features, indicating different orientational changes of the different parts of the flexible molecule on the colloidal silver surface with adsorbate concentration. The appearance of a broad, long-wavelength band in the absorption spectra of the silver sol due to solute-induced coagulation of colloidal silver particles is found to be red shifted with increase in adsorbate concentration. The SER excitation profiles indicate that the resonance of the Raman excitation radiation with the new aggregation band contributes more to the SERS intensity than that with the original sol band.

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Section: Concentration-dependent Sers Spectra Of Isomeric Bpsmentioning

confidence: 99%

Adsorption of 3‐ and 4‐benzoylpyridine on colloidal silver particles: a surface‐enhanced Raman scattering study

Chowdhury

Ghosh

2004

J Raman Spectroscopy

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“…A more favored adsorption site can be enumerated theoretically by estimating the partial atomic charges on each of these probable active sites. [61,62] Since the silver surface is positively charged, it is possible that the sulfate site with more negative charge density on the atom will have higher probability of adsorption. Theoretical results estimated from the atom will have higher probability of adsorption.…”

Section: Sers Spectrummentioning

confidence: 99%

FT‐IR, FT‐Raman and SERS spectra of anilinium sulfate

Anto

Varghese

et al. 2009

J Raman Spectroscopy

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The FT-IR and FT-Raman spectra of anilinium sulfate were recorded and analyzed. The surface-enhanced Raman scattering (SERS) was recorded from a silver electrode. The vibrational wavenumbers of the compound have been computed using the Hartree-Fock/6-31G * basis and compared with the experimental values. The molecule is adsorbed on the silver surface with the benzene ring in a tilted orientation. The presence of amino and sulfate group vibrations in the SERS spectrum reveal the interaction between amino and sulfate groups with the silver surface. The direction of the charge transfer contribution to SERS has been discussed from the frontier orbital theory.

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“…Chowdhury et al [74] reported the in-plane skeletal deformation bands of Interaction parameters of the title compound. Short-ring interaction Pi-ring interactions Primary aromatic amines with nitrogen directly on the ring absorb at 1330-1260 cm À1 because of the stretching of the phenyl CAN bond [56].…”

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confidence: 99%

Vibrational spectroscopic studies and computational study of quinoline-2-carbaldehyde benzoyl hydrazone

Sheeja

Mangalam

Kurup

et al. 2010

Journal of Molecular Structure

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a b s t r a c tFT-IR spectrum of quinoline-2-carbaldehyde benzoyl hydrazone (HQbÁH 2 O) was recorded and analyzed. The synthesis and crystal structure data are also described. The vibrational wavenumbers were examined theoretically using the Gaussian03 package of programs using HF/6-31G(d) and B3LYP/6-31G(d) levels of theory. The data obtained from vibrational wavenumber calculations are used to assign vibrational bands obtained in infrared spectroscopy of the studied molecule. The first hyperpolarizability, infrared intensities and Raman activities are reported. The calculated first hyperpolarizability is comparable with the reported values of similar derivatives and is an attractive object for future studies of non-linear optics. The geometrical parameters of the title compound obtained from XRD studies are in agreement with the calculated values. The changes in the CAN bond lengths suggest an extended p-electron delocalization over quinoline and hydrazone moieties which is responsible for the non-linearity of the molecule.

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Surface enhanced Raman scattering of 2,2′ biquinoline adsorbed on colloidal silver particles

Cited by 80 publications

References 32 publications

Adsorption of 3‐ and 4‐benzoylpyridine on colloidal silver particles: a surface‐enhanced Raman scattering study

Adsorption of 3‐ and 4‐benzoylpyridine on colloidal silver particles: a surface‐enhanced Raman scattering study

FT‐IR, FT‐Raman and SERS spectra of anilinium sulfate

Vibrational spectroscopic studies and computational study of quinoline-2-carbaldehyde benzoyl hydrazone

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