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You searched on: Topic Area: Molecular Physics

Displaying records 21 to 30 of 33 records.
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21. Conformational Effects on Excitonic Interactions in a Prototypical H-bonded Bichromophore: Bis(2-hydroxyphenyl)methane
Topic: Molecular 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 ...

22. Rotationally Resolved Studies of the Exciton Coupled S1/S2 Origin Regions of Diphenylmethane and the d12 Isotopologue
Topic: Molecular Physics
Published: 12/9/2008
Authors: David F Plusquellic, Kevin O Douglass, Jaime Stearns, Nathan Pillsbury, Timothy Zwier, Christian Muller
Abstract: Rotationally resolved microwave and ultraviolet spectra of jet-cooled diphenylmethane (DPM) and DPM-d^12 have been obtained in S^d0, S^d1 and S2 electronic states using Fourier-transform microwave and UV laser/molecular beam spectrometers. The S0 and ...

23. The Infrared Spectroscopy and Photochemistry of NO^d3^ Trapped in Solid Neon
Topic: Molecular Physics
Published: 11/10/2008
Authors: Marilyn E Jacox, Warren Elwin Thompson
Abstract: NO3 can be stabilized in solid neon either by codeposition at 4.3 K of a Ne:O2 mixture with a Ne:NO mixture that had been passed through a microwave discharge or, in higher yield, by codeposition of a Ne:NO mixture with a Ne:O2 mixture, followed by a ...

24. Assignment, Fit, and Theoretical Discussion of the nu-10 Band of Acetaldehyde Near 509 cm^u-1^
Topic: Molecular Physics
Published: 9/4/2008
Authors: I Kleiner, N Moazzen-Ahmadi, A RW McKellar, Thomas A Blake, G Moruzzi, Jon Torger Hougen
Abstract: The lowest small-amplitude vibration in acetaldehyde (CH3CHO) is the in-plane aldehyde scissors mode ?10 at 509 cm?1. This mode lies about 100 cm?1 above the top of the barrier to internal rotation of the methyl group and is relatively well separate ...

25. Ultrafast Dynamics of Model Molecular Photoswitches in Solid Phase
Topic: Molecular Physics
Published: 12/18/2007
Authors: Tung T. To, Edwin J Heilweil
Abstract: Ultraviolet pump, infrared probe transient absorption studies of the chelatable compound 1, [Mn{?5-C5H4C(O)(SCH3)3}(CO)3], dispersed in room temperature, ~25 m thick polyacryclonitrile (PAN) films are reported for the first time. Irradiation of 1 ...

26. The water-oxygen dimer: first-principles calculation of an extrapolated potential energy surface and second virial coefficients.
Topic: Molecular Physics
Published: 8/20/2007
Authors: Allan H Harvey, Richard J. Wheatley
Abstract: The Systematic Intermolecular Potential Extrapolation Routine (SIMPER) is applied to the water-oxygen complex to obtain a five-dimensional potential energy surface. This is the first application of SIMPER to open-shell molecules, and it is the first ...

27. Intermolecular potential and second virial coefficient of the water-nitrogen complex
Topic: Molecular Physics
Published: 3/6/2007
Authors: Allan H Harvey, Akyl S. Tulegenov, Richard J. Wheatley, Matthew P. Hodges
Abstract: We construct a rigid-body (five-dimensional) potential-energy surface for the water-nitrogen complex using the systematic intermolecular potential extrapolation routine (SIMPER). The intermolecular potential is then extrapolated to the limit of a com ...

28. A Critical Review of Second Virial Coefficients for Water Vapor with Air and With Argon
Topic: Molecular Physics
Published: 8/1/2005
Authors: Peter H. Huang, Allan H Harvey
Abstract: This work reviews the current state of knowledge for the second virial coefficients of water vapor with air and with argon. Comparative tabulations of the coefficients are given from -20 degrees C to 100 degrees C along with the associated uncer ...

29. Transport Coefficients and Molecular Dynamics: Altermatives
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7170
Topic: Molecular Physics
Published: 10/4/2004
Author: Raymond Dale Mountain
Abstract: The task of using molecular dynamics to determine the shear viscosity and the thermal conductivity of a model fluid is examined in detail for the Lennard-Jones fluid. The equilibrium time correlation function approach is compared with three nonequil ...

30. Intermolecular Potential and Second Virial Coefficient of the Water-Hydrogen Complex
Topic: Molecular Physics
Published: 1/1/2004
Authors: M P Hodges, R J Wheatley, G K Schenter, Allan H Harvey
Abstract: We construct a rigid-body (5-dimensional) potential-energy surface for the water-hydrogen complex using scaled perturbation theory (SPT). An analytic fit of this surface is obtained, and using this, two minima are found: the global miniumum has C^d2 ...

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