Magnetic circular dichroism studies of matrix-isolated metal atoms

Grinter, R.; Stern, David R.

doi:10.1016/0022-2860(82)87222-0

Cited by 9 publications

(19 citation statements)

References 1 publication

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“…The blue/green emission observed both on deposition and annealing may correspond to that observed by Grinter and Stern [12,13], Schrittenlacher et al [14] and Ozin and Garcia-Prieto [16,17] after irradiation at 40000 -50000 cm −1 (250 -200 nm, 4.96 -6.20 eV).…”

Section: Palladium Atoms In Solid Argonsupporting

confidence: 83%

“…Grinter and Stern [12,13] observed very similar absorption spectra for palladium atoms in argon to those of Klotzbücher and Ozin [2,11]. When they recorded MCD spectra for Pd atoms with scanning from long to short wavelengths, no MCD signal was detected below 40000 cm −1 (250 nm, 4.96 eV).…”

Section: Introductionmentioning

confidence: 62%

“…As the blue/green emission was observed during deposition, it is most likely that the Pd atoms are being pumped by the Ar + discharge which has components throughout the visible and ultraviolet regions as well as the vacuum ultraviolet, and that there is further relaxation of the excited state on annealing. Grinter and Stern observed the effects of photolysis by 40000 -50000 cm −1 (250 -200 nm, 4.96 -6.20 eV) in their MCD spectra and assigned the excited state as 3 F 4 [12,13]. Schrittenlacher et al observed broad emission in Ar at ca.…”

Section: Palladium Atoms In Solid Argonmentioning

confidence: 99%

“…The strength of the post photolysis MCD signal indicated that the species responsible for it was paramagnetic, and Grinter and Stern thought that the most likely state for the transient MCD signal was 3 F 4 (4d 8 5s 2 ) which lies ca. 25000 cm −1 (400 nm, 3.10 eV) above the 1 S 0 ground state in the gas phase [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Many of these sites are not detected in absorption, but only observed in excitation and emission experiments. However, many of the reports indicate the presence of a photochemically accessible excited state, variously assigned as 3 F 4 [12,13], 3 D 1 [14] or 3 D 3 [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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X-ray absorption study of platinum and palladium atoms in argon matrices: Evidence for platinum in a substitutional site and a short Pd Ar interaction

Harris

Sakr

Snelling

et al. 2018

Journal of Molecular Structure

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The Pt L 3 -edge X-ray absorption spectrum of Pt atoms generated in a hollow cathode sputtering device and trapped in an Ar matrix yielded a Pt-Ar distance of 3.78(4) Å with a coordination number of ca. 12 which confirms the evidence from electronic absorption spectroscopy that Pt atoms occupy a substitutional site in the Ar lattice. These data also yield a van der Waals radius for Pt atoms of 1.90 Å. The Pd K-edge X-ray absorption spectrum of sputtered Pd atoms trapped in an Ar matrix is radically different to that for Pt atoms. This contains a much shorter Pd-Ar distance of 2.53(3) Å with a low coordination number close to 1, together with an "atomic" EXAFS like spectrum with no significant oscillations indicating the absence of any well defined nearest neighbours. On annealing to 25 K, the 2.53(3) Å interaction essentially disappears to leave the "atomic" spectrum. The featureless "atomic" spectrum is associated with Pd 1 S 0 atoms in an argon substitutional site, or other site such as a grain boundary with high disorder. The short Pd-Ar distance of 2.53(3) Å is consistent with Pd atoms with a 1 S 0 atomic ground state in an interstitial octahedral site, the formation of a PdAr n exciplex with a short Pd-Ar distance, or the formation of a more formal palladium

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