Raman spectra of mass-selected dihafnium in argon matrixes

Hu, Zhangjun; Jie, Dong; Lombardi, John R.; Lindsay, D. M.

doi:10.1021/j100139a001

Cited by 32 publications

(41 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We have observed this previously for Re 2 . 15 In this latter experiment we were aided by an extensive, and sharp absorption spectrum which enabled us to determine dissociation energies for several states. However, the preference of transition metals for bonding with ns 1 configurations suggests that Rh 2 will most likely dissociate to two 4 F (4d 8 5s 1 ) atoms.…”

Section: Discussionmentioning

confidence: 99%

Spectroscopy of mass-selected rhodium dimers in argon matrices

Wang

Haouari

Craig

et al. 1997

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

The absorption ͑scattering depletion͒ spectrum and Raman spectra for Rh 2 in an argon matrix prepared by the mass selected ion deposition technique have been obtained. The absorption spectrum in the visible region shows a single broad transition centered near 495 nm Resonance Raman spectra obtained by exciting with eight visible lines ͑457.9-514.5 nm͒ of an argon ion laser give a single, sharp progression with up to four Stokes transitions. These data give e ϭ283.9 ͑18͒ cm Ϫ1 with e x e ϭ1.83 ͑33͒ cm Ϫ1 , leading to an experimental dissociation energy of 1.4Ϯ0.3 eV. The Raman results are discussed in the context of previous theoretical predictions for the dimer.

show abstract

Section: Discussionmentioning

confidence: 99%

Spectroscopy of mass-selected rhodium dimers in argon matrices

Wang

Haouari

Craig

et al. 1997

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…14 Since Nb has only one more electron than Zr, if we assume that the orbital ordering of Nb 3 is the same as Zr 3 in D 3h geometry, then the configuration of ground state is (1a 1 Ј) 2 (2a 1 Ј) 2 (1eЈ) 4 (1a 2 Љ) 2 (1a 1 Љ) 2 (2eЈ) 3 , containing a hole in the second eЈ orbital and indicating a likely 2 EЈ ground state. This state is susceptible to Jahn-Teller distortion in the D 3h geometry.…”

Section: Discussionmentioning

confidence: 99%

“…1,2 We now know force constants for the ground states of homonuclear transition metal diatomic species in a large portion of the periodic table. 3 Comparatively speaking, the studies of the properties of trimers and higher clusters are quite limited and still require more experimental and theoretical attention. In the case of niobium, several articles have addressed the bonding energies or ionization potentials ͑IPs͒ of larger niobium species, but little detailed information, especially regarding the structure and bonding of triniobium has emerged to date.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of mass-selected niobium trimers in argon matrices

Wang

Craig

Haouari

et al. 1996

The Journal of Chemical Physics

Self Cite

View full text Add to dashboard Cite

The absorption ͑scattering depletion͒ spectrum and Raman spectra for Nb 3 in an argon matrix prepared by the mass selected ion deposition technique have been obtained. The absorption spectrum in the visible region shows three overlapping transitions, centered at 20 300 cm Ϫ1 ͑A͒, 18 800 cm Ϫ1 ͑B͒, and 17 000 cm Ϫ1 ͑C͒, respectively. Resonance Raman spectra obtained with excitation into these bands display two distinct fundamental frequencies at 227.4Ϯ2.9͑eЈ͒ and 334.9 Ϯ 2.8(a 1 Ј) cm Ϫ1 which indicate that the ground state of the Nb 3 molecule has a nearly equilateral triangular geometry ͑D 3h ͒. The f r ͑bond stretch͒ and f rr ͑stretch-stretch interaction͒ force constants for Nb 3 are determined to be 1.95 and 0.05 mdyn/Å, respectively. The Raman excitation profiles bear a strong resemblance to the triniobium absorption spectrum, but the peaks seem more closely spaced than the absorption spectrum. Both a 1 Ј and eЈ vibration are observed with the same intensity near the peak A, while the a 1 Ј vibration dominates the profile at the peak B.Neither displays much intensity near the peak C.

show abstract

“…To our knowledge, only a Raman spectrum of the dimer exists. 1 In that work we utilized our mass-selection cluster beam to isolate dimers, which enabled unambiguous absorption and resonance Raman spectra to be obtained. Several transitions were observed in the visible region, and by pumping into the band at 620 nm a long progression in the ground-state vibration was observed.…”

Section: Introductionmentioning

confidence: 99%