Zobrazeno 1 - 10 of 17 pro vyhledávání: '"Helga Hoier"'
1
A coupled dual hydrogen bridge system—solution dynamics and crystal structure of 2-dimethylamino-4,6-bis(2-hydroxyphenyl)-1,3,5-triazine †
Autor: Sonja Henkel, Achim Fettig, Wolfgang Frey, Peter Fischer, Jean-Luc Birbaum, Horst E. A. Kramer, Helga Hoier, Manfred Roessler
Publikováno v: Journal of the Chemical Society, Perkin Transactions 2. :90-96
Detailed NMR analysis (CD2Cl2, 183 K) shows the two intramolecular hydrogen bridges of 2-dimethylamino-4,6-bis(2-hydroxyphenyl)-1,3,5-triazine to be directed either towards N-1 and N-3 (S conformer; both hydrogen bonds to an aza nitrogen ortho to the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77adf6478fb6c705c1d7b16cbe1e4970
https://doi.org/10.1039/b005956k
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2
Crystal structure of octakis(2,3,6-tri-O-methyl)-γ-cyclodextrin·4.5 H2O: evidence for conformational flexibility of permethylated cyclodextrins
Autor: Günter Reck, Burkhard Schulz, Helga Hoier, Wolfram Saenger, Thammarat Aree
Publikováno v: Carbohydrate Research. 328:399-407
Octakis(2,3,6-tri-O-methyl)-gamma-CD (TRIMEG) cocrystallized at 18 degrees C with 4.5 water molecules in the orthorhombic space group P2(1)2(1)2(1), unit cell dimensions a = 10.7879(3), b = 29.0580(9), c = 32.2909(11) A. The TRIMEG macrocycle is in a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c49603973dbd2c39c1a18b4da701b1ea
https://doi.org/10.1016/s0008-6215(00)00100-2
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4
Crystal structure of hexakis(2,6-di-O-methyl)-α-cyclodextrin–acetonitrile dihydrate: a channel formed by methyl groups harbors a chain of five partially occupied water sites
Autor: Burkhard Schulz, Günter Reck, Thammarat Aree, Wolfram Saenger, Helga Hoier
Publikováno v: Carbohydrate Research. 320:120-128
Hexakis(2,6-di-O-methyl)-alpha-cyclodextrin (DIMEA) crystallizes from 1:1 water-acetonitrile as DIMEA-acetonetril-dihydrate in the orthorhombic space group P2(1)2(1)2(1), unit cell dimensions a = 14.2775(5), b = 15.7312(5), c = 31.1494(11) A. Refinem
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fcdfe3477d4720ac469db6aebb1f2e6
https://doi.org/10.1016/s0008-6215(99)00147-0
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5
Variation of a Theme: Crystal Structure with Four Octakis(2,3,6-tri-O-methyl)-γ-cyclodextrin Molecules Hydrated Differently by a Total of 19.3 Water
Autor: Helga Hoier, Isabel Usón, Thammarat Aree, Burkhard Schulz, Günter Reck, George M. Sheldrick, Wolfram Saenger
Publikováno v: Journal of the American Chemical Society. 121:3321-3327
Octakis(2,3,6-tri-O-methyl)-γ-cyclodextrin (TRIMEG) crystallized from saturated aqueous solution at 18 °C in the monoclinic space group P21 with 4 TRIMEG and a total of 19.3 water molecules in the ...
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e9a703e6ffca3882673934f2d12a885c
https://doi.org/10.1021/ja9838561
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6
Crystal structure of heptakis(2,6-di-O-methyl)-β-cyclodextrin dihydrate: a water molecule in an apolar cavity
Autor: Helga Hoier, Peter Leibnitz, Wolfram Saenger, Thammarat Aree
Publikováno v: Carbohydrate Research. 315:199-205
Heptakis(2,6-di-O-methyl)-β-cyclodextrin crystallized from water at 18 °C as dihydrate (DIMEB·2 H2O) in the monoclinic space group P21 with unit cell dimensions a=15.2415(5), b=10.6391(4), c=23.3239 (8) A, β=101.798(1)°. X-ray analysis reveals a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea2c68600faf040daa1bacd81c646679
https://doi.org/10.1016/s0008-6215(99)00033-6
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7
Ultraviolet Absorbers of the 2-(2-Hydroxyaryl)-1,3,5-triazine Class and Their Methoxy Derivatives: Fluorescence Spectroscopy and X-ray Structure Analysis
Autor: Manfred Roessler, Pascal Hayoz, Guido J. Stueber, Martin Stein, Denis LeGourriérec, Helmut Port, Frank Waiblinger, Christine Schroeder, Peter Fischer, Helga Hoier, and Gerhard Rytz, Horst E. A. Kramer, Juergen Keck, Sonja Henkel, Thomas Hirsch
Publikováno v: The Journal of Physical Chemistry B. 102:6975-6985
A close to planar conformation is established for 2-(4-methoxyphenyl)-4,6-diphenyl-1,3,5-triazine (M−H−P) by crystal structure determination. For 2-(4-hexoxy-2-methoxyphenyl)-4,6-diphenyl-1,3,5-triazine (H−MeO−P), hydrophobic interaction betw
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d8ae53cededa7f8575b53a279aa9fc97
https://doi.org/10.1021/jp9818380
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8
Crystal structure of a murine α-class glutathioneS-transferase involved in cellular defense against oxidative stress
Autor: Ute Krengel, Klaus-Hasso Schröter, Helga Hoier, Anita Arkema, Kor H. Kalk, Piotr Zimniak, Bauke W. Dijkstra
Publikováno v: FEBS Letters, 422, 285-290. Wiley
Glutathione S-transferases (GSTs) are ubiquitous multifunctional enzymes which play a key role in cellular detoxification. The enzymes protect the cells against toxicants by conjugating them to glutathione. Recently, a novel subgroup of α-class GSTs
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12d24c5dbd6c10959edb149d6a15e1ef
https://doi.org/10.1016/s0014-5793(98)00026-x
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