Exciting Opportunities for Solid-State

Autor: Hans J, Jakobsen, Henrik, Bildsøe, Martin, Bondesgaard, Bo B, Iversen, Michael, Brorson, Flemming H, Larsen, Zhehong, Gan, Ivan, Hung

Publikováno v: J Phys Chem C Nanomater Interfaces

Solid-state, natural-abundance (95)Mo NMR experiments of four different MoS(2) materials have been performed on a magnet B(0) = 19.6 T and on a new Series Connected Hybrid (SCH) magnet at 35.2 T. Employing two different 2H-MoS(2) (2H phase) materials

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::f4b042887080dd15333cfb675f420711
https://pubmed.ncbi.nlm.nih.gov/34262634

NMR and EPR Studies of Free-Radical Intermediates from Experiments Mimicking the Winds on Mars: A Sink for Methane and Other Gases

Autor: Svend J. Knak Jensen, Likai Song, Per Nørnberg, Zhehong Gan, Ebbe Bak, Hans J. Jakobsen, Jørgen Skibsted, Henrik Bildsøe, Kai Finster, Ivan Hung

Publikováno v: Jakobsen, H J, Song, L, Gan, Z, Hung, I, Bildsoe, H, Skibsted, J, Bak, E N, Finster, K, Nornberg, P & Jensen, S K 2016, ' NMR and EPR Studies of Free-Radical Intermediates from Experiments Mimicking the Winds on Mars : A Sink for Methane and Other Gases ', The Journal of Physical Chemistry Part C, vol. 120, no. 45, pp. 26138-26149 . https://doi.org/10.1021/acs.jpcc.6b08847

A new kind of solid gas chemical reactions has been investigated using solid-state powder H-2, C-13, and Si-29 NMR and EPR spectroscopies. These studies involve reactions between a silicate-created Si free-radical intermediate and a few ordinary gase

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8be4b3c370df2338e94e84869b0604cc
https://doi.org/10.1021/acs.jpcc.6b08847

Dynamic Solid-State NMR Experiments Reveal Structural Changes for a Methyl Silicate Nanostructure on Deuterium Substitution

Autor: Ivan Hung, Hans J. Jakobsen, Henrik Bildsøe, Anders T. Lindhardt, Zhehong Gan, Jørgen Skibsted, Flemming H. Larsen

Publikováno v: Jakobsen, H J, Lindhardt, A T, Bildsøe, H, Skibsted, J, Gan, Z, Hung, I & Larsen, F H 2017, ' Dynamic Solid-State NMR Experiments Reveal Structural Changes for a Methyl Silicate Nanostructure on Deuterium Substitution ', Journal of Physical Chemistry C, vol. 121, no. 47, pp. 26507-26518 . https://doi.org/10.1021/acs.jpcc.7b08826

Structural characterizations of three different solid-gas reaction products, recently obtained from abraded solid-state silicate free radicals reacting with two isotopically enriched methane gases, 13CH4 and CD4 (a possible sink for methane on MARS)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::438781e4ce226c969b25217c50e22d5a
https://pure.au.dk/portal/da/publications/dynamic-solidstate-nmr-experiments-reveal-structural-changes-for-a-methyl-silicate-nanostructure-on-deuterium-substitution(1d72d90b-605b-4d21-8c85-307d2913b465).html

Double cross-polarization MAS NMR in the assignment of abundant-spin resonances: 19F–{29Si}–19F FBCP/MAS NMR of fluoride ions incorporated in calcium silicate hydrate (C–S–H) phases

Autor: Hans J. Jakobsen, Henrik Bildsøe, Jørgen Skibsted, Thuan T. Tran

Publikováno v: Journal of Magnetic Resonance. 221:19-23

A new version of the double cross-polarization MAS NMR experiment, which transfers polarization Forth and Back (FBCP) between high- and low-γ spin nuclei, is presented. The pulse sequence is demonstrated by ¹⁹F-{²⁹Si}-¹⁹F and ¹⁹F-{¹³C}

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::47f7d3c668b0a5032b12de1da75af5dc
https://doi.org/10.1016/j.jmr.2012.05.018

Sensitivity enhancement in natural-abundance solid-state 33S MAS NMR spectroscopy employing adiabatic inversion pulses to the satellite transitions

Autor: Hans J. Jakobsen, Henrik Bildsøe, Michael Ryan Hansen, Michael Brorson, Jørgen Skibsted

Publikováno v: Hansen, M R, Brorson, M, Bildsøe, H K, Skibsted, J & Jakobsen, H J 2007, ' Sensitivity Enhancement in Natural-Abundance Solid-State 33S MAS NMR Spectroscopy Employing Adiabatic Inversion Pulses to the Satellite Transitions ', Göttingen, Germany, 26/09/2007-29/09/2007, .

The WURST (wideband uniform rate smooth truncation) and hyperbolic secant (HS) pulse elements have each been employed as pairs of inversion pulses to induce population transfer (PT) between the four energy levels in natural abundance solid-state (33)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2b73b6ede10bcc83c06a3976955d342
https://doi.org/10.1016/j.jmr.2007.11.014