Time dependence of the photodissociation of strontium(1+) diammoniate cluster

Schmuttenmaer, Charles A.; Qian, Jun; Donnelly, S. G.; DeLuca, Michael J.; Varley, David F.; DeLouise, Lisa A.; Miller, R. J. D.; Farrar, James M.

doi:10.1021/j100115a001

Cited by 14 publications

(6 citation statements)

References 7 publications

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“…4. The rate of this process has been known to be much slower than the present time region, 41 and thus, the pump pulse alone gives a constant signal level. If the pump pulses do not affect the population of the parent ions in the ground state, we would expect the increase of signal intensity upon irradiation of the probe pulses; the rise time should be equal to the dissociation time.…”

Section: B Pump-probe Experimentsmentioning

confidence: 95%

Multiphoton ionization and oxidation processes of Mg–ammonia clusters

Okai

Yoshida

Aranishi

et al. 2005

Phys. Chem. Chem. Phys.

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Multiphoton ionization and oxidation processes of ammoniated magnesium clusters are investigated by the multiphoton ionization method with an intense femtosecond laser. In the photoionization of mass-selected Mg+ (NH3)n, evaporation dominates at lower laser intensity, while the oxidation reaction to produce H-atom elimination products, MgNH2+ (NH3)m, becomes predominant at higher intensity. In addition to these fragment ions, doubly-charged ions are observed for n > or = 2 at the laser intensity higher than 10(12) W cm(-2). We also examined the femtosecond pump probe experiments for Mg+ (NH3)4 by monitoring these reaction products. The lifetime of the first excited state is determined as 0.8 ps from the temporal profile of MgNH2+ (NH3)m. On the other hand, the time profile of the evaporation products exhibits a bleaching of the absorption, which gives the recovery time of the initial state as 1.2 ps. Multiphoton excitation of Mg(NH3)n with the femtosecond laser at 800 nm gives doubly-charged ions with n > 3 in addition to singly-charged cluster ions and H-atom elimination products such as MgNH2+ (NH3)m. The absence of small doubly-charged ions is ascribed to a charge reduction reaction followed by Coulomb explosion. On the basis of these results, the dynamics of the solvation and oxidation reaction processes of Mg(NH3)n is discussed.

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Section: B Pump-probe Experimentsmentioning

confidence: 95%

Multiphoton ionization and oxidation processes of Mg–ammonia clusters

Okai

Yoshida

Aranishi

et al. 2005

Phys. Chem. Chem. Phys.

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“…In these spectra the rotational structure of the van der Waals complex in neighbourhood of a vibrational transition of one monomer can be resolved and the potential of the excited van der Waals complex can be determined. It was even possible to excite van der Waals stretching and bending modes in van der Waals complexes with the help of a far infrared laser system [9]. From such extensive data highly reliable potentials can be evaluated [ 101.…”

Section: Measurements Of Interaction Second Virial Coefficients Of Bimentioning

confidence: 99%

Measurements of Interaction Second Virial Coefficients of Binary Mixtures of Inert Gases and Gases

Vatter

Schmidt

Elias

et al. 1996

Ber Bunsenges Phys Chem

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The interaction second virial coefficients of the mixtures Ar/CO, Ar/N2, Ar/O2, Ne/CO, Ne/N2, and Ne/O2 were measured from 296 K to 463 K, utilizing the expansion method and the temperature changing method. Improvements in the previously described apparatuses reduced systematical errors and provided more accurate measurements of the coefficients. The experimental data were compared to calculations of interaction second virial coefficients based on modern potential energy surfaces. None of the previously reported potential energy surfaces was sufficient to account for the measured interaction second virial coefficients over our experimental temperature range from 296 K to 463 K.

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“…This allows for the exploration of the potential energy surfaces of the reacting pair and could be also accomplished on ionic clusters. However there have only been few such examples in the case of ion molecule reactions …”

Section: Introductionmentioning

confidence: 99%

Investigation of Ion−Molecule Reactions via Femtosecond Excitation and Ionization of [Tetrakis(dimethylamino)ethylene]_n_≥₁

et al. 2004

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The dynamics of ionic monomer and multimers of the ethylenic molecule TDMAE (tetrakis(dimethylamino)ethylene) have been studied under femtosecond stepwise excitation using an energy surface of the neutral molecule (or cluster) as a relay. This specific excitation takes advantage of the wave packet evolution in the neutral intermediate state to (i) allow access to different regions of the ionic potential surface and (ii) identify some aspects of the dynamics in the ionic state of either TDMAE + or TDMAE n + . This original experimental approach we shall name double pump excitation. We have identified the existence of a double well in TDMAE n + corresponding to a different localization of the positive charge, the most stable corresponding to a complete delocalization over the nitrogen atoms. A reaction in the dimer and higher multimer ions is observed that involves the formation of compounds of general mass 200 m 116 n + . This reaction is only observed in clusters and not in thermal ion molecule collisions between TDMAE + and TDMAE. A tentative mechanism of formation for this product is proposed that involves the creation of a distonic ion via H-atom migrations. The double pump method could be extended to many other systems to explore competing pathways in ionic reactions, differently accessed via transient states of a neutral intermediate.

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Time dependence of the photodissociation of strontium(1+) diammoniate cluster

Cited by 14 publications

References 7 publications

Multiphoton ionization and oxidation processes of Mg–ammonia clusters

Multiphoton ionization and oxidation processes of Mg–ammonia clusters

Measurements of Interaction Second Virial Coefficients of Binary Mixtures of Inert Gases and Gases

Investigation of Ion−Molecule Reactions via Femtosecond Excitation and Ionization of [Tetrakis(dimethylamino)ethylene]_n_≥₁

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Time dependence of the photodissociation of strontium(1+) diammoniate cluster

Cited by 14 publications

References 7 publications

Multiphoton ionization and oxidation processes of Mg–ammonia clusters

Multiphoton ionization and oxidation processes of Mg–ammonia clusters

Measurements of Interaction Second Virial Coefficients of Binary Mixtures of Inert Gases and Gases

Investigation of Ion−Molecule Reactions via Femtosecond Excitation and Ionization of [Tetrakis(dimethylamino)ethylene]n≥1

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Investigation of Ion−Molecule Reactions via Femtosecond Excitation and Ionization of [Tetrakis(dimethylamino)ethylene]_n_≥₁