TITLE

Deconvoluting the visible absorption spectrum of methyl orange using inverse Raman transform techniques

AUTHOR(S)
Rava, Richard P.
PUB. DATE
October 1987
SOURCE
Journal of Chemical Physics;10/1/1987, Vol. 87 Issue 7, p3758
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Resonance Raman excitation profiles have been measured for all the active vibrations between 800 and 1600 cm-1 over the visible absorption band of methyl orange. The excitation profiles indicate that two transitions contribute to the observed absorption band profile, and that individual vibrations appear to be enhanced via resonance with single electronic transitions. Using inverse Raman transform techniques, the absorption bands responsible for the resonance Raman activity are determined from the excitation profiles of the 924 and 1393 cm-1 modes. Two distinct absorption bands with maxima at 437 and 475 nm are found to fit the excitation profiles and inverse transform results. The transitions responsible for these bands are determined from qualitative molecular orbital arguments and are assigned to nπ* and charge transfer excitations.
ACCESSION #
7622946

 

Related Articles

  • Resonance Raman intensity analysis of the excited state proton transfer dynamics of 2-nitrophenol in the charge-transfer band absorption. Wang, Ya-Qiong; Wang, Hui-Gang; Zhang, Shu-Qiang; Pei, Ke-Mei; Zheng, Xuming; Lee Phillips, David // Journal of Chemical Physics;12/7/2006, Vol. 125 Issue 21, p214506 

    Resonance Raman spectra were obtained for 2-nitrophenol in cyclohexane solution with excitation wavelengths in resonance with the charge-transfer (CT) proton transfer band absorption. These spectra indicate that the Franck-Condon region photodissociation dynamics have multidimensional character...

  • Excited-state dynamics of alizarin-sensitized TiO[sub 2] nanoparticles from resonance Raman spectroscopy. Shoute, Lian C. T.; Loppnow, Glen R. // Journal of Chemical Physics;7/8/2002, Vol. 117 Issue 2, p842 

    Resonance Raman spectra of alizarin-sensitized TiO[sub 2] nanoparticles have been obtained at excitation wavelengths throughout the 488-nm charge transfer absorption band. The resonance Raman spectrum of the alizarin-sensitized TiO[sub 2] nanoparticle is significantly different from the spectrum...

  • Excited-state structure and electronic dephasing time of Nile blue from absolute resonance Raman intensities. Lawless, Mary K.; Mathies, Richard A. // Journal of Chemical Physics;6/1/1992, Vol. 96 Issue 11, p8037 

    Absolute resonance Raman cross sections are measured for Nile blue 690 perchlorate dissolved in ethylene glycol with excitation at 514, 531, and 568 nm. These values and the absorption spectrum are modeled using a time-dependent wave packet formalism. The excited-state equilibrium geometry...

  • Infrared Absorption by Pairs of Group III and V Impurities in Silicon. Pokrovskiı, Ya. E.; Smirnova, O. I.; Khval’kovskiı, N. A. // Journal of Experimental & Theoretical Physics;Jul2002, Vol. 95 Issue 1, p83 

    Infrared absorption bands, shifted to regions of lower energies relative to narrow lines of transitions of impurities to excited states, are investigated in silicon doped with group III and V impurities in concentrations above 10[sup 16] cm[sup -3]. It is found that the band structure is...

  • Excited state dynamics and photophysics of aggregated dye chromophores in solution. Sundström, Villy; Gillbro, Tomas // Journal of Chemical Physics;9/15/1985, Vol. 83 Issue 6, p2733 

    We have studied the excited state relaxation processes of monomeric and aggregated diethylthiadicarbocyanine iodide (DTDCI) by means of picosecond absorption spectroscopy. The strongly interacting chromophores of dimers and trimers are found to have very fast and efficient radiationless...

  • Vacuum ultraviolet absorption spectra and photodissociative excitation of CHBr2Cl and CHBrCl2. Ibuki, Toshio; Hiraya, Atsunari; Shobatake, Kosuke // Journal of Chemical Physics;6/15/1992, Vol. 96 Issue 12, p8793 

    Photoabsorption and fluorescence excitation spectra of CHBr2Cl and CHBrCl2 trihalomethanes were measured in the 106–200 nm region using synchrotron radiation as a light source. Main photoabsorption bands observed are assigned as the Rydberg transitions of the outer shell orbitals. In the...

  • The UV absorption spectrum of C60 (buckminsterfullerene): A narrow band at 3860 Ã…. Heath, J. R.; Curl, R. F.; Smalley, R. E. // Journal of Chemical Physics;10/1/1987, Vol. 87 Issue 7, p4236 

    The absorption spectrum of the special C60 cluster buckminsterfullerene has been studied in a supersonic beam by laser depletion of the cold van der Waals complexes of C60 with benzene and methylene chloride. Both complexes were found to display a single, isolated absorption band in the near...

  • State-selective photodissociation dynamics of NOCl: The influence of excited state bending and stretching vibrations. Qian, C. X. W.; Ogai, A.; Iwata, L.; Reisler, H. // Journal of Chemical Physics;11/15/1988, Vol. 89 Issue 10, p6547 

    The photodissociation of jet-cooled NOCl following excitation in the lowest, structured absorption band is reported. We find that NO(2∏3/2) is produced preferentially, and that the rotational distributions depend strongly on the number of bending quanta in the upper electronic state. In...

  • Raman spectra of runthenium dimers. Huaiming Wang; Yifei Kiu; Haouari, Hanae; Craig, R.; Lombardi, J.R.; Lindsay, D.M. // Journal of Chemical Physics;4/22/1997, Vol. 106 Issue 16, p6534 

    Obtains the absorption (scattering depletion) spectrum and resonance Raman spectrum for Ru[sub 2] in an argon matrix prepared by the mass-selected ion deposition technique. Spectra and analysis; Details of the Ru[sub 2] Raman spectrum; Comparison of theoretical and thermodynamic findings for...

Share

Read the Article

Courtesy of NEW JERSEY STATE LIBRARY

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics