Photofragmentation spectroscopy of magnesium dideuteride(1+)

Ding, Li; Young, Mark A.; Kleiber, P. D.; Stwalley, W. C.; Lyyra, A. M.

doi:10.1021/j100112a019

Cited by 73 publications

(47 citation statements)

References 4 publications

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“…We have also obtained vibrationally resolved spectra for magnesium ion with several small molecules (Mg+-CO,, Mg+-N2 and Mg+-H,O), which provide for the first time enough information to determine the structure of polyatomic complexes [19,20]. Mg+ rare gas complexes, [24] and the Mg+-D, complex studied by Stwalley et al [25] are some of the most weakly bound metal ion systems studied to date. Theory [26-331 and experiment agree that the bonding interactions in all of the complexes studied so far are primarily electrostatic in nature.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of weakly-bound magnesium ion complexes

Yeh

Pilgrim

Willey

et al. 1994

International Reviews in Physical Chemistry

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Weakly bound complexes of the form MgC-L (L=CO,, H,O, N,, Ar, etc.) are prepared in a pulsed nozzle/laser vapourization cluster source and studied in the molecular beam environment. The ion complexes are jet cooled and mass selected in a specially designed reflectron time-of-flight mass spectrometer for their study. The mass-selected ions are excited with a tunable dye laser, and the products, if any, from photodissociation are mass analysed and detected as a function of the excitation laser wavelength. This photodissociation spectroscopy experiment reveals the decomposition channels of excited complexes and their absorption spectra. Photodissociation channels vary from simple metal ionligand bond breaking, to metal-to-ligand charge transfer, to metal insertion/ elimination reactions in the excited state. In reactive systems, the spectra are broad and featureless. However, in systems with simple metal-ligand dissociation, vibrational and partial rotational resolution is obtained in the spectra. The detailed analysis of this structure makes it possible to determine the structures of metal ion complexes and their metal-ligand binding energies.

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Section: Introductionmentioning

confidence: 99%

Spectroscopy of weakly-bound magnesium ion complexes

Yeh

Pilgrim

Willey

et al. 1994

International Reviews in Physical Chemistry

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“…[1][2][3][4][5][6] For example, we have investigated excited state chemical dynamics in weakly bound bimolecular complexes M ϩ ͑CH 4 ͒ ͑with MϭMg and Ca͒. 3,4 For Mg ϩ ͑CH 4 ͒, the broad continuum Mg ϩ (3s→3 p) absorption spectrum is consistent with a large geometry change on excitation and fast dissociation.…”

Section: Introductionmentioning

confidence: 99%

Photodissociation spectroscopy of Ca+(C2H4)

Holmes

Kleiber

Olsgaard

et al. 2000

The Journal of Chemical Physics

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We have studied Ca ϩ ͑C 2 H 4 ͒ by photodissociation spectroscopy in a reflectron time-of-flight mass spectrometer over the spectral range 440-790 nm. Ca ϩ is the only photofragment observed. We find four absorption bands of the complex and assign them to metal-centered transitions correlating with excitation of Ca ϩ ͑3d and 4 p͒. Spectral assignment is supported by ab initio electronic structure calculations of the complex and isotope substitution experiments. Calculations find a weakly bound ground state equilibrium structure with C 2V -bonding geometry and a dissociation energy of D e Љ ϭ0.506 eV. Theoretical and experimental results show the 4p(2 2 B 2 & 2 2 B 1 ) excited states to be relatively weakly bound at long range. Spectral analysis gives vibrational constants for the Ca ϩ --C 2 H 4 intermolecular a 1 -stretch in the 1 2 A 1 , 2 2 B 1 , and 2 2 B 2 states, and for the CH 2 -CH 2 a 1 -wag and the HCH a 1 -bend in 2 2 B 2 . The results offer an interesting comparison with previous studies of similar weakly bound bimolecular complexes of light metal ions with alkene or alkane hydrocarbons.

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“…Extensive investigations of metal atomic ion-molecule systems have been carried out for many years using photodissociation spectroscopy. [1][2][3][4][5][6][7][8] In many cases the primary interest has been in probing the metal-ligand binding energies and the structure of the complex. [1][2][3][4][5] Other studies of the dissociation dynamics have given unique insight into the competition between the chemical and physical quenching channels for the excited metal atomic ion chromophore under ''half-collision'' conditions.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] Other studies of the dissociation dynamics have given unique insight into the competition between the chemical and physical quenching channels for the excited metal atomic ion chromophore under ''half-collision'' conditions. [6][7][8] Recently these experimental methods have also been extended to the study of more complex metal diatomic ion-molecule processes. 9,10 For example, in recent publications we have reported on our investigations of the photodissociation dynamics of bare Mg 2 ϩ , 9 and of the bimolecular complex Mg 2 CO 2 ϩ .…”

Section: Introductionmentioning

confidence: 99%

Photofragmentation dynamics of Mg2H2O+

Chen

Cheng

Kleiber

1997

The Journal of Chemical Physics

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Structures and stabilities of doubly charged ( MgO ) n Mg 2+ (n=1-29) cluster ionsWe report studies of the structure and dissociation dynamics of the Mg 2 H 2 O ϩ ion-molecule complex. The weakly bound clusters are formed in a supersonic molecular beam equipped with a laser vaporization source, mass-selected, and studied by laser photofragmentation spectroscopy in a tandem time-of-flight mass spectrometer. Broad structureless molecular absorption bands are observed in the red ͑610-745 nm͒, the green ͑515-595 nm͒, and the near UV ͑335-390 nm͒ spectral regions, and are assigned to transitions localized on the Mg 2 ϩ chromophore. Three daughter ions ͑Mg ϩ , Mg 2 ϩ , and MgH 2 O ϩ ͒ have been observed. We have studied the competitive branching into accessible product channels as a function of photolysis wavelength in these bands. In order to understand the dissociation mechanisms we have carried out ab initio calculations of the ground and low lying excited states of the Mg 2 H 2 O ϩ complex. These studies give insight into the dissociation dynamics. Results from these experiments are compared and contrasted with previous work on the photodissociation of Mg 2 CO 2 ϩ . © 1997 American Institute of Physics. ͓S0021-9606͑97͒00201-8͔ by X ͑ϭCO 2 , H 2 O, CH 4 ͒. However this experimental approach has the distinct advantages of the ''half-collision'' 77

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Photofragmentation spectroscopy of magnesium dideuteride(1+)

Cited by 73 publications

References 4 publications

Spectroscopy of weakly-bound magnesium ion complexes

Spectroscopy of weakly-bound magnesium ion complexes

Photodissociation spectroscopy of Ca+(C2H4)

Photofragmentation dynamics of Mg2H2O+

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