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You searched on: Author: david plusquellic

Displaying records 11 to 20 of 102 records.
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11. Rotationally Resolved C2 Symmetric Conformers of Bis-(4-hydroxyphenyl)methane: Textbook Examples of Excitonic Coupling in the S1 and S2 Electronic States
Published: 9/1/2011
Authors: Shin G. Chou, Chirantha P. Rodrigo, Christian Muller, Kevin O Douglass, Timothy Zwier, David F Plusquellic
Abstract: Rotationally resolved microwave and ultraviolet spectra of jet-cooled bis-4 hydroxy)-diphenylmethane (b4HBM) have been obtained using Fourier-transform microwave and UV laser/molecular beam spectrometers. A recent vibronic level study of b4HPM1 has ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907835

12. State Resolved THz Spectroscopy and Dynamics of Crystalline Peptide/Water Systems
Published: 7/11/2011
Authors: Zeeshan Ahmed, Shin G. Chou, Karen M. Siegrist, David F Plusquellic
Abstract: State resolved THz studies of crystalline peptides and their hydrates have provided precise measures of the infrared active phonon modes that reflect motions on the longest possible length scales in these systems. The impact of co-crystallized water ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907455

13. Conformer-specific vibronic spectroscopy and vibronic coupling in a flexible bichromophore: bis-(4-hydroxyphenyl)methane
Published: 4/28/2011
Authors: Chirantha P. Rodrigo, Christian Muller, Nathan Pillsbury, William H. James III, David F Plusquellic, Timothy Zwier
Abstract: The vibronic spectroscopy of jet-cooled bis-(4-hydroxyphenyl)methane (b4HPM) has been explored using fluorescence excitation (FE), dispersed fluorescence (DFL), UV-UV holeburning (UVHB), UV depletion (UVD), and fluorescence-dip infrared (FDIR) spectr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907736

14. Chirped-pulse terahertz spectroscopy for broadband trace gas sensing
Published: 4/22/2011
Authors: Eyal Gerecht, Kevin O Douglass, David F Plusquellic
Abstract: We report the first demonstration of a broadband trace gas sensor based on chirp-pulse terahertz spectroscopy. The advent of newly developed solid state sources and heterodyne detectors for the terahertz frequency range have made it possible to gener ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907773

15. Far Infrared Absorption Measurements of Single Walled Carbon Nanotubes
Published: 1/17/2011
Authors: Shin G. Chou, Zeeshan Ahmed, Georgy Samsonidze, Jing Kong, Mildred Dresselhaus, David F Plusquellic
Abstract: Variable temperature high resolution far infrared absorption measurements were carried out for single walled carbon nanotubes samples with different diameter distributions. At a temperature where kBT is significantly lower than the phonon energy, th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906962

16. Organic Compounds in the C3H6O3 Family: Microwave Spectrum of cis-cis-Dimethyl Carbonate
Published: 10/18/2010
Authors: Francis John Lovas, David F Plusquellic, Susanna L. Widicus Weaver, B. A. McGuire, G. A. Blake
Abstract: Geometry optimization calculations on 13 members of the C3H6O3 family of organic species have been carried out to determine their relative binding energies. Dimethyl carbonate [(CH3)2CO3] is one of the lower energy species in this family, which inclu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906135

17. Distinguishing Tunneling Pathways For Two Chiral Conformer Pairs Of 1,3-Propanediol From The Microwave Spectrum
Published: 11/19/2009
Authors: Francis John Lovas, David F Plusquellic, Brooks H Pate, Justin L. Neill, Matt T. Muckle, Anthony J. Remijan
Abstract: Using both a cavity and a broadband microwave spectrometers, the microwave spectrum of the sugar alcohol 1,3-propanediol (CH2OHCH2CH2OH) has been measured over the frequency range 6.7 GHz to 25.4 GHz. Two conformers of 1,3-propanediol have been assi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902614

18. Microwave Spectrum of 1,2-Propanediol
Published: 9/1/2009
Authors: Francis John Lovas, David F Plusquellic, Brooks Pate, Justin L. Neill, Matt T. Muckle, Anthony J. Remijan
Abstract: The microwave spectrum of the sugar alcohol 1,2-propanediol (CH3CHOHCH2OH) has been measured over the frequency range 6.5 GHz to 25.0 GHz with several pulsed-beam Fourier-transform microwave spectrometers. Seven conformers of 1,2-propanediol have be ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902388

19. Conformational Effects on Excitonic Interactions in a Prototypical H-bonded Bichromophore: Bis(2-hydroxyphenyl)methane
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

20. Terahertz Spectra and Normal Mode Analysis of the Crystalline VA Class Dipeptide Nanotubes
Published: 12/31/2008
Authors: David F Plusquellic, Weimin Zhang, Karen M. Siegrist, Susan K. Gregurick
Abstract: Terahertz (THz) spectra of the crystalline VA class dipeptide nanotubes were calculated at both the harmonic and Vibrational Self-consistent Field (VSCF) level using the CHARMM22 force field with periodic boundary conditions. Comparison of the calcul ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842523



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