Theory of distortion-induced IR and Raman intensities of different modes of molecular units adsorbed onto metal surfaces

Bhattacharjee, R.
March 1988
Journal of Chemical Physics;3/15/1988, Vol. 88 Issue 6, p4018
Academic Journal
A quantitative theory of distortion-induced IR and Raman intensities due to different modes of molecular units adsorbed on metal surfaces is formulated. This theory not only classifies the vibrational modes into categories of those attaining AI, AII, AIII, DIA-I(μ), DIA-II(μ), etc., but also gives a better understanding of the mechanism which activates the modes. In addition, it helps in deciding the effective symmetry of the adsorbed molecular unit onto metal surfaces. This point has been demonstrated by discussing an example of surface Raman spectroscopy of benzene-d6 molecule adsorbed onto (111) and (110) faces of silver single crystal. It is concluded that this molecule attains polar type of distortion of C1 symmetry on these surfaces.


Related Articles

  • Observation of the β-methylallyl radical by resonance Raman spectroscopy. Getty, James D.; Liu, Xianming; Kelly, Peter B. // Journal of Chemical Physics;3/1/1996, Vol. 104 Issue 9, p3176 

    The resonance Raman spectrum of the β-methylallyl (2-methyl-allyl) radical is detected with excitation from 223 nm to 243 nm. The first observation of four fundamentals, the symmetric CH2 rock, the symmetric CCC stretch, the C–CH3 stretch, and the CCC bend, as well as an overtone, the...

  • Generation of tunable visible and near-IR light from 2.5 ps, high-power Ti : sapphire pulses by Raman shifting in hydrogen. Fischer, I.; Schultz, T. // Applied Physics B: Lasers & Optics;1997, Vol. 64 Issue 1, p15 

    Stimulated Raman scattering was studied as a means to extend the tuning range of short-pulse Ti : sapphire lasers. Pulses of 2.5 ps duration at 784 and 392 nm with energies up to several millijoules were focused into a cell filled with up to 26 bar of hydrogen. With a pump wavelength of 392 nm,...

  • A surface-enhanced hyper-Raman and surface-enhanced Raman scattering study of trans-1,2-bis(4-pyridyl)ethylene adsorbed onto silver film over nanosphere electrodes. Vibrational assignments: Experiment and theory. Yang, Wen-hui; Hulteen, John; Schatz, George C.; Van Duyne, Richard P. // Journal of Chemical Physics;3/15/1996, Vol. 104 Issue 11, p4313 

    We present theoretical and experimental studies of the infrared (IR) spectroscopy, normal Raman spectroscopy (NRS), surface-enhanced Raman spectroscopy (SERS), and surface-enhanced hyper-Raman (SEHRS) spectroscopy of trans-1,2-bis(4-pyridyl)ethylene (BPE). This centrosymmetric molecule is...

  • An interpretation of the vibrational spectra of insulating and electrically conducting poly(3-methylthiophene) aided by a theoretical dynamical model. Hernandez, V.; Ramirez, F. J.; Otero, T. F.; Lopez Navarrete, J. T. // Journal of Chemical Physics;1/1/1994, Vol. 100 Issue 1, p114 

    It is shown that the relevant spectral features which arise in the infrared spectrum of poly(3-methylthiophene) upon chemical doping or photoexcitation (i.e., in the electrically conducting form) can be properly explained by means of the effective conjugation coordinate (ECC) formalism. This...

  • High resolution pulsed infrared cavity ringdown spectroscopy: Application to laser ablated carbon clusters. Casaes, Raphael; Provenc¸al, Robert; Paul, Joshua; Saykally, Richard J. // Journal of Chemical Physics;4/15/2002, Vol. 116 Issue 15, p6640 

    We report the design and performance of a tunable, pulsed high resolution mid infrared cavity ringdown spectrometer. Stimulated Raman scattering in H[sub 2]/D[sub 2] is used to downconvert the output of a SLM Alexandrite ring laser (720–800 nm) to the mid infrared (3–8 μm). The...

  • A Tribute to Foil Miller. Nowicki, Henry // Spectroscopy;Nov2000, Vol. 15 Issue 11, p16 

    Interviews Foil Allan Miller, a chemistry professor at the University of Pittsburgh in Pennsylvania. Feelings toward the standard of education; Information on training in interpreting infrared and Raman spectra; Connection of Miller with the Bowdoin College summer infrared course.

  • Synthesis, structure and intercalation of brannerite LiWVO6 wet-chemical products. Amdouni, N.; Zarrouk, H.; Julien, C. M. // Journal of Materials Science;Nov2003, Vol. 38 Issue 22, p4573 

    The brannerite-type vanadate LiWVO6 samples were prepared by different synthesis methods including both solid-state reaction of oxides and wet chemistry in aqueous solutions. The physicochemical and electrochemical properties of LiWVO6 products were extensively investigated. Thermal (TG-DTA)...

  • Optical Properties of Porous Nanosized GaAs. Belogorokhov, A. I.; Gavrilov, S. A.; Belogorokhov, I. A.; Tikhomirov, A. A. // Semiconductors;Feb2005, Vol. 39 Issue 2, p243 

    The optical properties of porous GaAs layers obtained by electrochemical etching of single-crystal n- and p-GaAs(100) wafers are studied. It is shown that the shape of the nanocrystals, their mean diameter, and their surface states depend on the conductivity type of the initial crystal. A shift...

  • Effect of ethanol on optical and electrical parameters of porous silicon. Bolotov, V. V.; Sten’kin, Yu. A.; Roslikov, V. E.; Kang, V. E.; Ponomareva, I. V.; Nesov, S. N. // Semiconductors;Jul2009, Vol. 43 Issue 7, p925 

    The effect of ethanol vapor adsorption on the properties of porous silicon-based structures was studied by Raman scattering, infrared spectroscopy, and I–V characteristics. A decrease in the resistance of porous silicon layers and a simultaneous increase in the intensity of the band of...


Read the Article


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

Try another library?
Sign out of this library

Other Topics