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Topic Area: Chemical Physics

Displaying records 21 to 30 of 35 records.
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21. Observation of the C2H2-N2O van der Waals Complex in the Overtone Range Using CW-CRDS
Topic: Chemical Physics
Published: 9/14/2009
Author: Walter Joseph Lafferty
Abstract: A slit nozzle supersonic expansion containing acetylene (0.246l/min) and nitrous oxide (0.355l/min) seeded into Ar (1.26l/min) is investigated using CW cavity ring down spectroscopy, in the 1.5 m range. The C2H2N2O van der Waals comp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901007

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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901502

23. Conformational Effects on Excitonic Interactions in a Prototypical H-bonded Bichromophore: Bis(2-hydroxyphenyl)methane
Topic: Chemical Physics
Published: 4/30/2009
Authors: David F Plusquellic, Nathan Pillsbury, Christian Mueller, Timothy Zwier
Abstract: Laser induced fluorescence (LIF), single vibronic level fluorescence, UV holeburning, and fluorescence-dip infrared (FDIR) spectroscopy have been carried out on bis-(2-hydroxyphenyl)methane (2HDPM) in order to characterize the ground and first excite ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901215

24. Analysis and fit of the high-resolution spectrum of the A 1A u X 1A g LIF spectrum of the two-equivalent-top molecule biacetyl
Topic: Chemical Physics
Published: 4/23/2009
Author: Jon Torger Hougen
Abstract: Abstract The laser-induced visible fluorescence excitation spectrum of the à 1Au (S1) - X̃ 1Ag (S0) transition in biacetyl (CH3-C(=O)-C(=O)-CH3) exhibits a long progression in the torsional vibrations of the two equivalent methyl tops in this ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901390

25. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832314

26. Variable Temperature Scanning Tunneling Microscopy of Pentacene Monolayer and Bilayer Phases on Ag(111)
Topic: Chemical Physics
Published: 12/25/2008
Authors: Dan B. Dougherty, Jim Wei, William Cullen, Janice Reutt-Robey, Steven W Robey
Abstract: Pentacene deposited onto a Ag(111) surface at 300 K is studied using scanning tunneling microscopy at temperatures of 300 K and 50 K.  At 300 K, ordered pentacene structures nucleate at Ag step edges (<i>Phys. Rev. B</i>  <b>2005 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832229

27. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830987

28. Ultraviolet Photoemission Spectra of Para-Phenylene-Ethynylene Thiols Chemisorbed on Gold
Topic: Chemical Physics
Published: 1/1/2008
Authors: Christopher D Zangmeister, Roger D van Zee, Steven W Robey, N E Gruhn, Yuxing Yao, J M Tour
Abstract: Photoemission spectra of para-phenylene-ethynylene thiols chemisorbed on gold have been measured. Four compounds were studied: 4,4'-bis(phenylethynyl)-benzenethiol, 4 (phenylethynyl)benzenethiol, 4-ethynylbenzenethiol, and benzenethiol. The spectra w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830991

29. Ultrafast Chelation Dynamics of a Manganese Tricarbonyl Derivative in Solid Polyacrylonitrile
Topic: Chemical Physics
Published: 1/1/2007
Authors: Tung T. To, Edwin J Heilweil
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101777

30. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841001



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