Structural Isomers of the Benzene Dimer from Mass Selective Hole-Burning Spectroscopy

1992 ◽  
Vol 47 (12) ◽  
pp. 1248-1252 ◽  
Author(s):  
W. Scherzer ◽  
O. Krätzschmar ◽  
H. L. Selzle ◽  
E. W. Schlag
Keyword(s):  
Gas Phase ◽  
Ground State ◽  
Supersonic Jet ◽  
Hole Burning ◽  
Structural Isomers ◽  
Benzene Dimer ◽  
Supersonic Jet Expansion

Mass selected hole-burning experiments in the gas phase are presented for the benzene dimer formed in a supersonic jet expansion. The observed spectra show three different ground state configurations for the dimer. From isotopically substituted dimers the structure of the most prominent conformer could be assigned to a very floppy T-shape like structure with two non-equivalent sites for the benzene molecules.

A New Liquid Droplet Laser Desorption Source Combined with Supersonic Jet Expansion: Application to Phenol and its Water Clusters

2014 ◽  
Vol 228 (4-5) ◽  
Author(s):  
Chayan Kanti Nandi ◽  
Hans-Dieter Barth ◽  
Bernhard Brutschy
Keyword(s):  
Gas Phase ◽  
Water Clusters ◽  
Liquid Droplet ◽  
Supersonic Jet ◽  
Laser Desorption ◽  
Laser Source ◽  
Published Data ◽  
Two Photon ◽  
Supersonic Jet Expansion ◽  
Phase Out

AbstractWe have developed a new laser source, for the spectroscopy of nonvolatile molecules in gas phase. It is based on a laser induced liquid bead ion desorption source (LILBID) combined with a supersonic beam. The cold molecules produced with this technique are sampled with Resonant Two Photon Ionization spectroscopy (R2PI) to measurement of the gas phase optical spectra. LILBID allows to bring nonvolatile molecule from liquid phase (out of a droplet) into gas phase, by means of multi photon ablation with IR photons exciting the vibrations of the solvent. Phenol and its different water clusters have been used as an example to demonstrate the method and to standardise the new experimental setup. The recorded R2PI spectral data of phenol monomer and its different water clusters obtained from this laser desorption technique are in very good agreement with the previously published data. This technique opens a new door for the measurement of molecules under microsolvation and potentially for

Entropic effects make a more tightly folded conformer of a β-amino acid less stable: UV-UV hole burning and IR dip spectroscopy of l-β3-homotryptophan using a laser desorption supersonic jet technique

2018 ◽  
Vol 20 (30) ◽  
pp. 19979-19986 ◽  
Author(s):  
Woon Yong Sohn ◽  
Jeong Jin Kim ◽  
Myeongwon Jeon ◽  
Takuma Aoki ◽  
Shun-ichi Ishiuchi ◽  
...  
Keyword(s):  
Amino Acid ◽  
Gas Phase ◽  
Supersonic Jet ◽  
Laser Desorption ◽  
Hole Burning ◽  
Gas Phase Spectroscopy ◽  
Entropic Effects

Gas-phase spectroscopy of homotryptophan was done to understand conformations of β-peptides.

Conformational changes in hydroxyl functional group upon hydration: the case study of Endo Fenchol

2020 ◽  
Author(s):  
Elias M Neeman ◽  
Thérèse Huet
Keyword(s):  
Fourier Transform ◽  
Gas Phase ◽  
Conformational Changes ◽  
Functional Group ◽  
Theoretical Calculations ◽  
Supersonic Jet ◽  
Microwave Spectrometer ◽  
Supersonic Jet Expansion ◽  
Hydroxyl Functional Group

The hydration of endo-fenchol has been studied in the gas phase using a combination of Fourier transform microwave spectrometer coupled to a supersonic jet expansion and theoretical calculations in the...

Gas-phase hydration of nopinone: the interplay between theoretical methods and experiments unveils the conformational landscape

2021 ◽  
Author(s):  
Elias M. Neeman ◽  
Juan Ramón Avilés Moreno ◽  
Thérèse Huet
Keyword(s):  
Fourier Transform ◽  
Gas Phase ◽  
Supersonic Jet ◽  
Theoretical Methods ◽  
Rotational Spectra ◽  
Supersonic Jet Expansion ◽  
Conformational Landscape

The structure of microsolvated nopinone formed in the supersonic jet expansion is investigated in the gas phase. The rotational spectra of nopinone-(H2O)n (n=1,2,3) were analysed by means of Fourier transform...

scholarly journals Negative ion photoelectron spectroscopy confirms the prediction that D3h carbon trioxide (CO3) has a singlet ground state

2016 ◽  
Vol 7 (2) ◽  
pp. 1142-1150 ◽  
Author(s):  
David A. Hrovat ◽  
Gao-Lei Hou ◽  
Bo Chen ◽  
Xue-Bin Wang ◽  
Weston Thatcher Borden
Keyword(s):  
Gas Phase ◽  
Ground State ◽  
Photoelectron Spectroscopy ◽  
Radical Anion ◽  
Negative Ion ◽  
Singlet Ground State

The CO3 radical anion (CO3˙−) has been formed by electrospraying carbonate dianion (CO32−) into the gas phase.

scholarly journals Spectral hole-burning of tetracene and tetracene—argon complexes in a supersonic jet

1991 ◽  
Vol 187 (6) ◽  
pp. 571-578 ◽  
Author(s):  
Bernhard Dick ◽  
Eyal Zinghar ◽  
Yehuda Haas
Keyword(s):  
Supersonic Jet ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Spectral Hole

The Dielectric Discharge as an Efficient Generator of Active Nitrogen for Chemiluminescence and Analysis

1983 ◽  
Vol 37 (6) ◽  
pp. 545-552 ◽  
Author(s):  
John Kishman ◽  
Eric Barish ◽  
Ralph Allen
Keyword(s):  
Gas Phase ◽  
Ground State ◽  
Band System ◽  
Electrothermal Atomization ◽  
Characteristic Radiation ◽  
Gaseous Species ◽  
Vibrationally Excited ◽  
Active Nitrogen ◽  
Excited Species ◽  
Intense Emission

A predominantly blue “active nitrogen” afterglow was generated in pure flowing nitrogen or in air by using a dielectric discharge at pressures from 1 to 20 Torr. The afterglow contains triplet state molecules and vibrationally excited ground state molecules. These species are produced directly by electron impact without the formation and recombination of nitrogen atoms. The most intense emission is the N2 second positive band system. The N2 first positive and N2+ first negative systems are also observed. The spectral and electrical properties of this discharge are discussed in order to establish guidelines for the analytical use of the afterglow for chemiluminescence reactions. The metastatic nitrogen efficiently transfers its energy to atomic and molecular species which are introduced into the gas phase and these excited species emit characteristic radiation. The effects of electrothermal atomization of Zn and the introduction of gaseous species (e.g., NO) on the afterglow are described.

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