Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Felix Hemmann"'
Autor:
Felix Hemmann, Kazuhiko Amakawa, Robert Schlögl, Annette Trunschke, Jutta Kröhnert, Sabine Wrabetz, Benjamin Frank, Christian Jäger
Publikováno v:
ChemCatChem
Metathesis of propene to ethene and 2-butenes was studied over a series of MoOx/SBA-15 catalysts (molybdenum oxide supported on mesoporous silica SBA-15; Mo loading 2.1~13.3 wt%, apparent Mo surface density 0.2~2.5 nm-2). The catalysts have been prep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d4b3014fed8e3a6d1f3222b549715ba
https://doi.org/10.1002/cctc.201500725
https://doi.org/10.1002/cctc.201500725
Autor:
Christian Jäger, Andreas Hennig, Heike Borcherding, Paul Dietrich, Uwe Schedler, Ute Resch-Genger, Felix Hemmann, Angelika Hoffmann, Thomas Thiele, Wolfgang E. S. Unger
Publikováno v:
The Analyst. 140:1804-1808
The fluorine content of polymer particles labelled with 2,2,2-trifluoroethylamine was reliably quantified with overlapping sensitivity ranges by XPS and solid-state NMR. This provides a first step towards reference materials for the metrological trac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c47b78defb0c998824ab8b93d75cdc11
https://doi.org/10.1039/c4an02248c
https://doi.org/10.1039/c4an02248c
Publikováno v:
Catal. Sci. Technol.. 4:1357-1368
The current furfural production yield is low due to the use of non-selective homogeneous catalysts and expensive separation. In this work, partially hydroxylated MgF2 catalysts, synthesized using different water contents, were screened during xylose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f914d77334a41611f03a0eb2c794665
https://doi.org/10.1039/c4cy00129j
https://doi.org/10.1039/c4cy00129j
Publikováno v:
RSC Adv.. 4:56900-56909
Quantitative determination of acidic surface sites is highly important for the characterization of solid acids because the activity of a catalyst is often related to the concentration of these sites. A recently developed method using 15N Nuclear Magn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34bae825c830529c790990c556ba0295
https://doi.org/10.1039/c4ra09477h
https://doi.org/10.1039/c4ra09477h
Publikováno v:
Journal of Catalysis. 305:81-91
Among the furan-based compounds, furfural (FUR) shows interesting properties as building-block or industrial solvent. It is produced from pentosan-rich biomass via xylose cyclodehydration. The current FUR production uses homogeneous catalysts and ste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96a08241f4c672ddf61005a2b26f5ab8
https://doi.org/10.1016/j.jcat.2013.05.005
https://doi.org/10.1016/j.jcat.2013.05.005
Publikováno v:
The Journal of Physical Chemistry C. 117:14710-14716
15N NMR of pyridine has been used to study Lewis and Bronsted sites at the acid surface of magnesium hydroxide fluoride at two different pyridine loadings with ratios of excess pyridine compared to pyridine molecules bound to Lewis and Bronsted sites
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::212a4c85dfa035751e68ca1f2d7a7f3b
https://doi.org/10.1021/jp405213x
https://doi.org/10.1021/jp405213x
Publikováno v:
The Journal of Physical Chemistry C. 116:10580-10585
Time-optimized 15N quantitative NMR (qNMR) is described for the precise determination of Lewis and Bronsted site concentrations per gram catalyst, enabling a measurement time reduction of more than...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca4eedea6c84374b705e24ef011002cf
https://doi.org/10.1021/jp212045w
https://doi.org/10.1021/jp212045w
Autor:
Christian Jaeger, Felix Hemmann
Publikováno v:
Solid state nuclear magnetic resonance.
A simple experiment for E limination of A rtifacts in NMR S pectroscop Y (EASY) was introduced in Part I, and it was shown that NMR probe background signals, spectral distortions due to deadtime effects, and acoustic ringing can be eliminated simulta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06947ba0ff461802cba75dd8b9d4c185
https://pubmed.ncbi.nlm.nih.gov/25200102
https://pubmed.ncbi.nlm.nih.gov/25200102
Autor:
Felix Hemmann, Christian Jaeger
Publikováno v:
Solid state nuclear magnetic resonance.
Elimination of Artifacts in NMR SpectroscopY (EASY) is a simple but very effective tool to remove simultaneously any real NMR probe background signal, any spectral distortions due to deadtime ringdown effects and -specifically- severe acoustic ringin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a34bdaf853cf49baaccf80064370541a
https://pubmed.ncbi.nlm.nih.gov/24300107
https://pubmed.ncbi.nlm.nih.gov/24300107
Autor:
Carsten Fritz, Felix Hemmann, Johannes Noack, Hans-Jürgen Gläsel, Erhard Kemnitz, Olaf Kahle, Clemens Flugel, Monika Bauer, Christian Dreyer
Publikováno v:
Dalton Transactions. 42:5706
The utilisation of magnesium and aluminium fluoride nanoparticles in the preparation of transparent composites leading to materials with superior properties was investigated. Nanoscopic magnesium and aluminium fluoride has been prepared by the fluoro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86d24093e8ea116f3ce609ef9a7090a8
https://doi.org/10.1039/c3dt32652g
https://doi.org/10.1039/c3dt32652g