Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Johnny Hioe"'
Publikováno v:
Molecules, Vol 26, Iss 24, p 7702 (2021)
A water-free, ternary solvent mixture consisting of a natural deep eutectic solvent (NADES), ethanol, and triacetin was investigated concerning its ability to dissolve and extract curcumin from Curcuma longa L. To this purpose, 11 NADES based on chol
Externí odkaz:
https://doaj.org/article/80574df310944e3d898572d65aa7c99a
Publikováno v:
Journal of the American Chemical Society
NMR provides both structural and dynamic information, which is key to connecting intermediates and to understanding reaction pathways. However, fast exchanging catalytic intermediates are often inaccessible by conventional NMR due its limited time re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88ff8519da8f93c40622227fa216cff5
https://doi.org/10.1021/jacs.9b07841
https://doi.org/10.1021/jacs.9b07841
Publikováno v:
The Journal of Organic Chemistry
In Bronsted acid catalysis, hydrogen bonds play a crucial role for reactivity and selectivity. However, the contribution of weak hydrogen bonds or multiple acceptors has been unclear so far since it is extremely difficult to collect experimental evid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fd89df7a999d596acc0e48526d85176
http://europepmc.org/articles/PMC6863592
http://europepmc.org/articles/PMC6863592
Autor:
Ruth M. Gschwind, Stefanie Gärtner, Corinna Lorenz, Nikolaus Korber, Nanjundappa Lokesh, Johnny Hioe, Florian Hastreiter
Publikováno v:
Angewandte Chemie International Edition. 58:3133-3137
The existence of [mu-HSi4](3-) in liquid ammonia solutions is confirmed by H-1 and Si-29 NMR experiments. Both NMR and quantum chemical calculations reveal that the H atom bridges two Si atoms of the [Si-4](4-) cluster, contrary to the expectation th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb3c6dcfea46428d9067e5eb75b5a1e9
https://doi.org/10.1002/anie.201812955
https://doi.org/10.1002/anie.201812955
Publikováno v:
Journal of Molecular Liquids. 361:119661
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c6e4d252d0ac6e433e5c5081c8cff9d
https://doi.org/10.1016/j.molliq.2022.119661
https://doi.org/10.1016/j.molliq.2022.119661
The Structure of [HSi9 ]3− in the Solid State and Its Unexpected Highly Dynamic Behavior in Solution
Autor:
Nikolaus Korber, Ruth M. Gschwind, Stefanie Gärtner, Corinna Lorenz, Johnny Hioe, Florian Hastreiter, Nanjundappa Lokesh
Publikováno v:
Angewandte Chemie International Edition. 57:12956-12960
We report on the first unambiguous detection of the elusive [HSi9](3-) anion in solutions of liquid ammonia by various Si-29 and H-1 NMR experiments including chemical exchange saturation transfer (CEST). The characteristic multiplicity patterns of b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c85c69031f4d27e2c51b2a0a581f0af1
https://doi.org/10.1002/anie.201807080
https://doi.org/10.1002/anie.201807080
Publikováno v:
Journal of the American Chemical Society
The low sensitivity of NMR and transient key intermediates below detection limit are the central problems studying reaction mechanisms by NMR. Sensitivity can be enhanced by hyperpolarization techniques such as dynamic nuclear polarization or the inc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ee19dcf7eb139fac4792679245c987e
https://doi.org/10.1021/jacs.7b12343
https://doi.org/10.1021/jacs.7b12343
Publikováno v:
Accounts of Chemical Research
Conspectus Over the years, the field of enantioselective organocatalysis has seen unparalleled growth in the development of novel synthetic applications with respect to mechanistic investigations. Reaction optimization appeared to be rather empirical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::208b86161b46a95441cdd81bc677f3cf
http://europepmc.org/articles/PMC6300316
http://europepmc.org/articles/PMC6300316
Publikováno v:
European Journal of Organic Chemistry. 2017:2194-2204
Phenol-containing nonsymmetrical biaryls play an important role in natural-product synthesis, as ligands in metal catalysis, and in organic functional materials. Their synthesis through cross-coupling reactions by two-fold direct C–H activation are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09cea27b4cbebdb23e81ae87d3af2a41
https://doi.org/10.1002/ejoc.201700211
https://doi.org/10.1002/ejoc.201700211
Autor:
Nils Sorgenfrei, Matej Žabka, Johannes Gramüller, Ruth M. Gschwind, Julian Greindl, Fabio Morana, Maxime Melikian, Johnny Hioe, Thomas Hausler, Kerstin Rothermel
Publikováno v:
Chemical Science
NMR H-bond analysis reveals an offset of internal and external acidities of catalysts and allows for a detailed reactivity analysis.
The concept of hydrogen bonding for enhancing substrate binding and controlling selectivity and reactivity is ce
The concept of hydrogen bonding for enhancing substrate binding and controlling selectivity and reactivity is ce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d22bd7cea96cdadfcee8451491847435
https://pubmed.ncbi.nlm.nih.gov/32015815
https://pubmed.ncbi.nlm.nih.gov/32015815