Resonance Raman spectrum of crystal violet

Angeloni, L.; Smulevich, Giulietta; Marzocchi, Mario P.

doi:10.1002/jrs.1250080603

Cited by 105 publications

(97 citation statements)

References 10 publications

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“…A recent resonance Raman These bands are not due to aggregation which has study suggests that CV exists as a single D, species been observed in more concentrated solution (3). in solution (5). Magnetic circular dichroism studies The presence of the two overlapping absorption are also consistent with a single propeller-like bands can be due to a single species with a sym-species (either with symmetrical or unsymmetrical metry less than D, (giving rise to two non-angles of twist of the phenyl group) with splitting of degenerate states) or due to two species.…”

Section: Introductionsupporting

confidence: 59%

Solvent effects on the visible absorption spectrum of crystal violet

Korppi-Tommola¹,

Yip²

1981

Can. J. Chem.

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. Addition of polar solvents to non-polar solutions of crystal violet results in dramatic changes in the visible absorption spectra. The observed changes are explained in terms of crystal violet existing as an ion-pair in non-polar solutions and as a solvated ion in polar solutions.The spectrum of crystal violet in toluene and in acetone solution remains virtually unchanged over a wide temperature range. However in methanol, as was reported for ethanol (I), the short wavelength component of the absorption in the visible region disappears as the temperature is lowered. The spectral behaviour in alcoholic solut~ons suggests a decreasing solvent-solute interaction around the dye cation due to increased self-association of the solvent molecules as the temperature is decreased. Our observations have a direct application in interpreting some of the results of the photodynamics of crystal violet in solution.J. KORPPI-TOMMOLA et R. W. YIP. Can. J. Chem. 59, 191 (1981). L'addition de solvants polaires aux solutions non polaires du cristal violet provoque des changements majeurs dans le spectre d'absorption visible. On explique les changements observes en fonction du fait que le cristal violet existe sous forme d'une paire d'ions dans les solutions non polaires et sous forme d'ion solvate dans les solutions polaires.Dans le toluene et dans une solution d'acetone, le spectre du cristal violet reste inchange sur une large echelle de temperature. Cependant, dans le methanol et tel que rapport6 pour I'tthanol (I), la composante de courte longueur d'onde de I'absorption dans la region du visible, disparait lorsqu'on abaisse la temperature. L e comportement spectral dans les solutions alcooliques suggere une diminution de I'interaction solvant-solute autour du cation colorant, provenant de I'augmentation de I'auto-association des molecules du solvant lorsque la temperature diminue. Nos observations trouvent une application directe dans I'interpretation de quelques resultats de la photodynamique du cristal violet en solution.[Traduit par lejournal] Introduction rings. This suggestion was based on the important The phenyl rings of the dye cation crystal violet observation that as the temperature is lowered, one (CV) (tri-p-dimethylamino phenylcarbonium ion), of the bands (the one at short wavelength) tends to like other triphenylmethane dyes, are forced out of disappear while the other band increases in abthe molecular plane by rotation about the central sorption. The observation clearly rules out the inbonds because of steric hindrance between the terpretation that the band structure represents a rings (1). If all of the rings are rotated in the same partially resolved vibrational structure of a single sense over the same angle, then the cation resem-electronic state. Recent experiments on the

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Section: Introductionsupporting

confidence: 59%

Solvent effects on the visible absorption spectrum of crystal violet

Korppi-Tommola¹,

Yip²

1981

Can. J. Chem.

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“…It is known that the 9 and ͑ -N͒ modes can couple with the S 0 → S 1 transition through the central carbon-phenyl displacement, and the benzenelike 8 mode is enhanced by the S 0 → S 2 transition. 26,27 Presumably, the observed difference is related to such contributions of different electronic excited states.…”

Section: Fig 2 ͑A͒mentioning

confidence: 99%

“…26 The vibrational modes of free crystal violet ion with propellerlike D 3 symmetry were calculated with B3LYP/ 6-311G ** , which were classified into A 1 ͑Raman active͒, A 2 ͑IR active͒, and E ͑IR/Raman active͒ symmetries. The three HRS peaks belong to the E symmetry.…”

Section: Fig 2 ͑A͒mentioning

confidence: 99%

“…24,25 The S 1 state consists of the delocalized orbitals involving a large contribution of the central carbon, whereas the S 2 state the localized benzenelike orbitals. 26 The 395 nm excitation may be in preresonance to the latter higher band. Figure 2͑a͒ shows three HRS spectra of crystal violet measured on glass ͑HRS gl ͒ and measured on the silver dimer array with parallel ͑SEHRS ʈ ͒ and perpendicular ͑SEHRSЌ͒ excitations to the interparticle axis.…”

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confidence: 99%

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Hyper-Raman scattering enhanced by anisotropic dimer plasmons on artificial nanostructures

Ikeda

Takase²,

Sawai³

et al. 2007

The Journal of Chemical Physics

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Silver nanodimers with a small gap of a few nanometers aligned on glass substrates were used to enhance hyper-Raman scattering of crystal violet dye molecules. When localized surface plasmon of the dimer array was resonantly excited along the interparticle axis, hyper-Raman intensity was significantly enhanced. Moreover, the spectral appearance was slightly different between the two excitation polarizations, suggesting a possibility of two resonance contributions at one-photon and two-photon energies. Since the plasmonic property of dimer arrays can be controlled by the dimer geometry, the dimer arrays are expected to be well-defined substrates for surface-enhanced hyper-Raman spectroscopy

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“…Resonance am& spectroscopy, due to its ability to give detailed molecular information at very low concentration of the sample, is being increasingly used to investigate systems with chromophoric moieties. Spectra of CV have been reported previously (8)(9)(10)(11)(12)(13)(14). All of these communications deal with the normal crystal violet and there is no published report on the resonance Raman spectrum of any of its deuterated derivatives according to the information available to us.…”

Section: Introductionmentioning

confidence: 99%