scholarly journals Quantum beats and dephasing in isolated large molecules cooled by supersonic jet expansion and excited by picosecond pulses: Anthracene

1981 ◽  
Vol 75 (12) ◽  
pp. 5958-5960 ◽  
Author(s):  
Wm. R. Lambert ◽  
P. M. Felker ◽  
A. H. Zewail
Keyword(s):  
Supersonic Jet ◽  
Quantum Beats ◽  
Picosecond Pulses ◽  
Large Molecules ◽  
Supersonic Jet Expansion

scholarly journals Picosecond Laser Chemistry in Supersonic Jet Beams

1983 ◽  
Vol 2 (3-4) ◽  
pp. 55-76 ◽  
Author(s):  
Ahmed H. Zewail
Keyword(s):  
Supersonic Jet ◽  
Picosecond Laser ◽  
Threshold Effect ◽  
Quantum Beats ◽  
Energy Redistribution ◽  
Laser Chemistry ◽  
Large Molecules ◽  
Rrkm Calculation ◽  
Statistical Behavior

In this review we describe the development and the applications of the picosecond-jet technique, which utilizes a picosecond laser and a supersonically-cold jet beam of large molecules. The applications include studies of coherence (quantum beats), photodissociation, isomerization, and partial solvation. The results emphasize the role of intramolecular energy redistribution, and provide evidence for intramolecular threshold effect for rates vs. excess molecular energy. Simple theory for this redistribution of energy among certain modes in molecules is given, and comparison with RRKM calculation is also made to assess the nature of the statistical behavior for the redistribution.

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

Multiphoton Ionization of Mixed Benzene-Water-Metanol Clusters. Competitive Microscopic Solvation

1990 ◽  
Vol 45 (9-10) ◽  
pp. 1217-1218 ◽  
Author(s):  
K. O. Börnsen ◽  
H. L. Selzle ◽  
E. W. Schlag
Keyword(s):  
Complex Formation ◽  
Water Molecule ◽  
Ternary Mixture ◽  
Multiphoton Ionization ◽  
Supersonic Jet ◽  
Polar Molecules ◽  
Supersonic Jet Expansion ◽  
Single Water Molecule

Abstract Clusters of benzene with polar molecules are observed from a supersonic jet expansion of a ternary mixture of benzene, water and methanol seeded in Helium. It is found that complex formation with methanol is strongly enhanced when a single water molecule is preadsorbed.

Symmetry selective cooling in the supersonic jet expansion of methane

1991 ◽  
Vol 146 (1) ◽  
pp. 181-187 ◽  
Author(s):  
Martin Hepp ◽  
G. Winnewisser ◽  
K.M.T. Yamada
Keyword(s):  
Supersonic Jet ◽  
Selective Cooling ◽  
Supersonic Jet Expansion
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