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Topic Area: Chemical Physics
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Displaying records 21 to 30 of 36 records.
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21. Shear Thinning Near the Critical Point of Xenon
Topic: Chemical Physics
Published: 4/17/2008
Authors: Robert F Berg, Michael R Moldover, M Yao, G A Zimmerli
Abstract: We measured shear thinning, a viscosity decrease ordinarily associated with complex liquids, near the critical point of xenon. The data span the range of reduced shear rates: 0.001 < {gamma}{tau} < 700, where {gamma}{tau} is the shear rate scal ...

22. Strategies for Advanced Applications of Permutation-Inversion Groups to the Microwave Spectra of Molecules with Large Amplitude Motions
Topic: Chemical Physics
Published: 5/4/2009
Author: Jon Torger Hougen
Abstract: This article presents permutation-inversion group-theoretical strategies and recipes that will help a high-resolution molecular spectroscopist attempting to use the existing pedagogical literature to carry out their own treatment of the basic symmet ...

23. Striped Domains at the Pentacene:C^d60^ Interface
Topic: Chemical Physics
Published: 1/12/2009
Authors: Dan B. Dougherty, W Jin, J Cullen, J Reutt-Robey, Steven W Robey
Abstract: STM observations of the initial growth stages of the first layer of pentacene on a monolayer film of C60 on Ag(111) are presented. Pentacene films nucleate and grow with molecules standing up at the Pentacene:C60 interface similar to the well known ...

24. Study of CeI^d3^ evaporation in the presence of Group 13 metal-iodides
Topic: Chemical Physics
Published: 1/17/2014
Authors: John J Curry, Albert Henins, E. G Estupinan, S. D. Shastri, Jonathan E Hardis, W. P. Lapatovich
Abstract: The influence of GaI$_3$, InI, and TlI on the evaporation characteristics of CeI$_3$ have been studied over the temperature range 900 K to 1400 K using x-ray induced fluorescence. The total vapor densities, summed over all atomic and molecular speci ...

25. Submillimeter Spectrum and Analysis of Vibrational and Hyperfine Coupling Effects in (HI)2
Topic: Chemical Physics
Published: 10/1/2009
Authors: Laurent H. Coudert, Sergei P. Belov, F. Willaert, B. McElmurry, R. Lucchese, John W. Bevan, Jon Torger Hougen
Abstract: Observed rotational-vibrational transitions of HI dimer in the geared bending mode, centered at 511.9 GHz, are reported. This ~50 kHz high resolution spectrum was recorded using a co-axially configured pulsed jet submillimeter spectrometer and the h ...

26. Symmetry and Fourier analysis of the ab-initio-determined torsional variation of structural and Hessian-related quantities for application to vibration-torsion-rotation interactions in CH3OH
Topic: Chemical Physics
Published: 1/11/2010
Authors: Li-Hong Xu, Jon Torger Hougen, Jonathan M. Fisher, Ronald M. Lees
Abstract: The aim of the present paper is to investigate the use of quantum chemistry calculations to obtain the torsional dependence of various structural and vibrational-force-field-related quantities that could help in estimating the vibration-torsion-rotat ...

27. Table-top ultrafast x-ray microcalorimeter spectrometry for molecular structure
Topic: Chemical Physics
Published: 3/26/2013
Authors: Jens (Jens) Uhlig, William Bertrand Doriese, Joseph Westbrook Fowler, Daniel S Swetz, Carl D Reintsema, Douglas A Bennett, Leila R Vale, Gene C Hilton, Kent D Irwin, Joel Nathan Ullom, Ilari Maasilta, Wilfred Fullagar, Niklas Gador, Sophie Canton, Kimmo Kinnunen, Villy Sundstrom
Abstract: This work presents an x-ray absorption measurement by use of ionizing radiation generated by a femtosecond pulsed laser source. The spectrometer was a microcalorimetric array whose pixels are capable of accurately measuring energies of individual ...

28. Time-Resolved Infrared Absorption Study of Cyclopentadienyl Manganese Tricarbonyl Derivatives With Pendant Sulfides in Acetonitrile
Topic: Chemical Physics
Published: 7/18/2006
Authors: Tung T. To, Edwin J Heilweil, T J Burkey
Abstract: The chelation dynamics of [5-C5H4C(O)R]Mn(CO)3 complexes 1 (R = CH2(SCH3)3), 2 (R = CH(SCH3)2), and 3 (R = C(SCH3)3) in room temperature acetonitrile solution have been investigated on the picosecond timescale by UV-pump IR-probe transient absorption ...

29. Time-Resolved Infrared Studies of a Trimethylphosphine Model Derivative of [FeFe]-Hydrogenase
Topic: Chemical Physics
Published: 10/1/2013
Authors: Edwin J Heilweil, Christopher Jon Stromberg, Melissa Johnson, James Thuman, Roger G. Letterman, Webster Edwin Charles
Abstract: Model compounds that structurally mimic the hydrogen-producing active site of [FeFe] hydrogenases have been explored. In order to explore potential ground-state electronic structure effects on reaction mechanisms compared to hexacarbonyl derivatives, ...

30. Time-Resolved Vibrational Spectroscopy of [FeFe-Hydrogenase Model Compounds
Topic: Chemical Physics
Published: 5/21/2012
Authors: Edwin J Heilweil, Christopher Jon Stromberg
Abstract: Fe2(μ-S2C3H6)(CO)6 is a model compound found to mimic the active site structure of the [FeFe]-hydrogenases. To observe the time-dependent behavior of this molecule, ultrafast ultraviolet (UV) or visible excitation with infrared (IR) probe measu ...

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