Vibrational relaxation of a polyatomic solute in a polyatomic supercritical fluid near the critical point

Urdahl, R. S.; Rector, K. D.; Myers, D. J.; Davis, P. H.; Fayer, M. D.
November 1996
Journal of Chemical Physics;11/15/1996, Vol. 105 Issue 19, p8973
Academic Journal
Vibrational lifetimes and absorption spectra of the asymmetric CO stretching mode (∼1990 cm-1) of W(CO)6 in supercritical CO2 are reported as functions of solvent density and temperature. Close to the critical temperature, the observables are density independent over a twofold range of density. Possible explanations are discussed for this unique behavior. © 1996 American Institute of Physics.


Related Articles

  • The ultraviolet absorption spectrum of the A 1A‘2←X 1A1 transition of jet-cooled ammonia. Vaida, V.; McCarthy, M. I.; Engelking, P. C.; Rosmus, P.; Werner, H.-J.; Botschwina, P. // Journal of Chemical Physics;6/15/1987, Vol. 86 Issue 12, p6669 

    The A←X absorption spectra of NH3 and ND3, recorded in a cold molecular jet, are presented. Vibrational band progressions resolvable up to v’2=14 appear. No other vibrations are present, either alone or in combinations. Relative band intensities for v2 progressions are recorded, and...

  • Vibronic spectrum and structure of the trans-bent acetylene radical anion. Kusumori, Takeshi; Matsuura, Kaoru; Muto, Hachizo // Journal of Chemical Physics;6/8/1996, Vol. 104 Issue 22, p8879 

    We report the first observation of the vibronic absorption spectrum of the trans-bent acetylene radical anion, produced in 3-methylpentane matrices by γ irradiation at 77 K. Two optical absorption bands are observed at 300–360 nm and in the region λ<420 nm. The former (strong) and...

  • Theoretical absorption spectrum of the Ar–CO van der Waals complex. López Cacheiro, Javier; Fernández, Berta; Pedersen, Thomas Bondo; Koch, Henrik // Journal of Chemical Physics;6/1/2003, Vol. 118 Issue 21, p9596 

    The three-dimensional intermolecular electric dipole moment surface of Ar-CO is calculated at the coupled cluster singles and doubles level of theory with the aug-cc-pVTZ basis set extended with a 3s3p2d1 f 1g set of midbond functions. Using the rovibrational energies and wave functions of our...

  • Photo-Physical Response of Two Triazole Compounds Against Solvent Polarity. Kian, Roshanak; Zakerhamidi, Mohammad Sadegh; Seyed Ahmadian, Seyed Masoud; Babaie, Ghader // Zeitschrift für Physikalische Chemie;Nov2016, Vol. 230 Issue 11, p1575 

    The triazole and its derivatives applications' in many drugs make the investigation of specific and non-specific interactions of these compounds with their environments important. Hence, absorption and emission spectra of two triazole compounds, with same molecular skeleton and different...

  • Time-resolved and static optical properties of vibrationally excited porphyrins. Rodriguez, Juan; Kirmaier, Christine; Holten, Dewey // Journal of Chemical Physics;5/1/1991, Vol. 94 Issue 9, p6020 

    The effects of nuclear motion on the ground state and excited state optical spectra of porphyrins are examined in a number of experiments designed to generate excess vibrational energy within the macrocycle. These include time-resolved spectroscopic measurements following ultrafast radiationless...

  • Triplet-state photoexcitations of oligothiophene films and solutions. Janssen, R. A. J.; Smilowitz, L.; Sariciftci, N. S.; Moses, D. // Journal of Chemical Physics;8/1/1994, Vol. 101 Issue 3, p1787 

    We present studies of steady-state photoinduced absorption (PIA) spectroscopy on photoexcitations in a series of well-defined α-oligothiophene (Tn, n=6, 7, 9, and 11) films and solutions. The PIA spectra and the excited state lifetimes are consistent with the signatures of a photoexcited...

  • On the 1593 Ã… transition of CS2. McDiarmid, Ruth; Doering, J. P. // Journal of Chemical Physics;8/15/1989, Vol. 91 Issue 4, p2010 

    The optical absorption spectrum of the 1593 Ã… transition of static (room temperature) and jet-cooled CS2 has been remeasured to determine the temperature dependence of the spectrum and to better characterize the experimental band shapes and intensities. Based on these results and others,...

  • Chirped pulse excitation in condensed phases involving intramolecular modes. II. Absorption spectrum. Fainberg, B. D.; Narbaev, V. // Journal of Chemical Physics;3/15/2002, Vol. 116 Issue 11, p4530 

    We have calculated the absorption spectrum of an intense chirped pulse exciting a solute molecule in a solvent. The excitation of quantum intramolecular modes has been also taken into account. In general absorption depends on both the real and imaginary part of the susceptibility (a...

  • Threshold-crossing counting technique for damping factor determination of resonator sensors. Kefeng Zeng; Grimes, Craig A. // Review of Scientific Instruments;Dec2004, Vol. 75 Issue 12, p5257 

    The behavior of resonator-type sensors at resonance is characterized by two fundamental parameters: resonance frequency and damping factor (or Q-factor). Practical applications require accurate and efficient measurements of these two parameters. Using magnetoelastic resonant sensors as a test...


Read the Article


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

Try another library?
Sign out of this library

Other Topics