Low frequency Raman spectra and librational lattice mode of triclinic n-paraffins

Kobayashi, Masamichi; Kobayashi, Tooru; Uesaka, T.; Tadokoro, Hiroyuki

doi:10.1016/0584-8539(79)80209-3

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…On the other hand, considering that citrate is a relatively ‘hard’ ligand, the description of its interaction with the gold atoms should not involve relevant MO interactions, thus implying in the predominance of the EM‐SERS mechanism. The assignment of the main citrate SERS bands (Table 3) was carried out in comparison with the Raman spectra of sodium citrate55 and literature data for related species 56–68…”

Section: Interaction Of Bptz With Citrate‐stabilized Gold Nanoparticlmentioning

confidence: 99%

New insights on surface‐enhanced Raman scattering based on controlled aggregation and spectroscopic studies, DFT calculations and symmetry analysis for 3,6‐bi‐2‐pyridyl‐1,2,4,5‐tetrazine adsorbed onto citrate‐stabilized gold nanoparticles

Melo

Zamarion

Araki

et al. 2011

J Raman Spectroscopy

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A systematic study on the surface-enhanced Raman scattering (SERS) for 3,6-bi-2-pyridyl-1,2,4,5-tetrazine (bptz) adsorbed onto citrate-modified gold nanoparticles (cit-AuNps) was carried out based on electronic and vibrational spectroscopy and density functional methods. The citrate/bptz exchange was carefully controlled by the stepwise addition of bptz to the cit-AuNps, inducing flocculation and leading to the rise of a characteristic plasmon coupling band in the visible region. Such stepwise procedure led to a uniform decrease of the citrate SERS signals and to the rise of characteristic peaks of bptz, consistent with surface binding via the N heterocyclic atoms. In contrast, single addition of a large amount of bptz promoted complete aggregation of the nanoparticles, leading to a strong enhancement of the SERS signals. In this case, from the distinct Raman profiles involved, the formation of a new SERS environment became apparent, conjugating the influence of the local hot spots and charge-transfer (CT) effects. The most strongly enhanced vibrations belong to a 1 and b 2 representations, and were interpreted in terms of the electromagnetic and the CT mechanisms: the latter involving significant contribution of vibronic coupling in the system.

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Section: Interaction Of Bptz With Citrate‐stabilized Gold Nanoparticlmentioning

confidence: 99%

New insights on surface‐enhanced Raman scattering based on controlled aggregation and spectroscopic studies, DFT calculations and symmetry analysis for 3,6‐bi‐2‐pyridyl‐1,2,4,5‐tetrazine adsorbed onto citrate‐stabilized gold nanoparticles

Melo

Zamarion

Araki

et al. 2011

J Raman Spectroscopy

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Vibrational spectroscopic study on polymorphism of erucic acid and palmitoleic acid: γ1→α1 and γ→α reversible solid state phase transitions

Kaneko

Yamazaki

Kobayashi

et al. 1994

Spectrochimica Acta Part A: Molecular Spectroscopy

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Effects of interlamellar forces on longitudinal acoustic modes of n-alkanes

Kobayashi

Sakagami

Tadokoro

1983

The Journal of Chemical Physics

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Effects of the interlamellar interactions in n-alkane crystals on the longitudinal acoustic modes (LAM), including both the fundamental and the higher overtones, were investigated on the basis of the polarized Raman spectra of n-C28H58, n-C30H62, n-C34H70, and n-C36H74 crystallized in the orthorhombic II form (a double layer polytype of the monoclinic form). The LAM-1 bands of this crystal modification split into a doublet consisting of the (cc) and (bc) polarization components separated by about 6 cm−1. The frequency gaps of the LAM-m bands were found to decrease with m (approximately proportional to m−1). Theoretical considerations on the correlation field splitting and the scattering intensities of the LAM bands led to the conclusion that the observed band splitting was caused by the intermolecular force acting between the successive monomolecular layers. The intrinsic value of the Young modulus of the n-alkane molecules free from the external forces in the crystalline state and the strength of the interlayer force were evaluated from the observed frequencies of the two components of LAM using a simple dynamical model. By comparing the Raman spectra of n-C28H58 and n-C30H62 between the triclinic and orthohombic II modifications, it was concluded that the effect of the lateral force on the LAM was not so significant as that of the longitudinal force.

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Low frequency Raman spectra and librational lattice mode of triclinic n-paraffins

Cited by 3 publications

References 22 publications

New insights on surface‐enhanced Raman scattering based on controlled aggregation and spectroscopic studies, DFT calculations and symmetry analysis for 3,6‐bi‐2‐pyridyl‐1,2,4,5‐tetrazine adsorbed onto citrate‐stabilized gold nanoparticles

New insights on surface‐enhanced Raman scattering based on controlled aggregation and spectroscopic studies, DFT calculations and symmetry analysis for 3,6‐bi‐2‐pyridyl‐1,2,4,5‐tetrazine adsorbed onto citrate‐stabilized gold nanoparticles

Vibrational spectroscopic study on polymorphism of erucic acid and palmitoleic acid: γ1→α1 and γ→α reversible solid state phase transitions

Effects of interlamellar forces on longitudinal acoustic modes of n-alkanes

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