The Interaction of Hydrogen with Iron Benzene-1,3,5-Tricarboxylate (Fe-BTC)

Inelastic neutron scattering (INS) spectroscopy is used to explore the 0–12,000 cm−1 range to characterise the interaction of H2 with iron benzene-1,3,5-tricarboxylate (Fe-BTC). Two peaks are observed in the low energy (<350 cm−1) region after exposure to H2. Measurements with hydrogen deuteride (HD) confirm that the peaks originate from H2. The most likely explanation is that there are two populations of H2 (HD) present. For both the H2- and the HD-loaded samples, the higher energy peak is close in energy to that of the pure isotopomer, so it is assigned to bulk-like H2/HD held in pores of the Fe-BTC. The lower energy peak is assigned to H2/HD interacting directly with the Fe ion exposed on dehydration. It was also possible to detect the H–H stretch in the same experiment; however, unfortunately, the instrumental resolution is insufficient to separate the stretch modes of the bound H2 (HD) and that in the pores.

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Low-energy magnetic response of the noncentrosymmetric heavy-fermion superconductorCePt3Sistudied via inelastic neutron scattering

Physical Review B ◽

10.1103/physrevb.78.184518 ◽

2008 ◽

Vol 78 (18) ◽

Cited By ~ 15

Author(s):

B. Fåk ◽

S. Raymond ◽

D. Braithwaite ◽

G. Lapertot ◽

J.-M. Mignot

Keyword(s):

Neutron Scattering ◽

Heavy Fermion ◽

Inelastic Neutron Scattering ◽

Inelastic Neutron ◽

Low Energy ◽

Magnetic Response

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Inelastic neutron scattering and low-energy excitation of amorphous SF6 hydrate prepared by vapor-deposition technique

Canadian Journal of Physics ◽

10.1139/p02-140 ◽

2003 ◽

Vol 81 (1-2) ◽

pp. 107-114 ◽

Cited By ~ 4

Author(s):

O Yamamuro ◽

T Matsuo ◽

I Tsukushi ◽

N Onoda-Yamamuro

Keyword(s):

Neutron Scattering ◽

Inelastic Neutron Scattering ◽

Inelastic Neutron ◽

Annealed Sample ◽

Low Energy ◽

Energy Excitation ◽

Hydrogen Bond Formation ◽

Crystalline Sample ◽

Two Samples ◽

Vapor Deposition Technique

Amorphous SF6 hydrate (SF6·17H2O) was prepared by depositing the mixed vapor onto a substrate kept at about 8 K. The inelastic neutron-scattering spectra of the as-deposited sample and those annealed at about 120 and 150 K were measured at 50 K in the energy range below 100 meV. The first two samples were considered to be in amorphous states while the third one was in a crystalline state. The librational frequency of the water molecule (at around 60 meV) is smaller in the order of (as-deposited sample) < (annealed sample) < (crystalline sample). This indicates that the strength of the intermolecular hydrogen bonds is (crystalline sample) > (annealed sample) > (as-deposited sample). The spectra below 10 meV were compared with our previous data of pure vapor-deposited amorphous ices and those doped with methanol (CD3OH). The low-energy excitation (E < 6 meV) differed drastically depending on the dopants, i.e., the scattering intensity was enhanced by methanol doping but reduced by SF6 doping. This may be because the hydrogen-bond formation was hindered by methanol doping but promoted rather more by SF6 doping because of the hydrophobic interaction as in clathrate hydrates. PACS Nos.: 61.12Ex, 63.50tx

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