Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Ilja G. Shenderovich"'
Publikováno v:
Russian Journal of General Chemistry. 80:2027-2031
The study of 2,2′-bipyridyl adsorption on the surface of highly regular MCM-41 silica at 300 and 130 K was carried out by the 15N NMR spectroscopy. It was shown that at 300 K the adsorbed molecules were involved in the processes of isotropic reorie
Publikováno v:
The Journal of Physical Chemistry A. 114:2393-2399
The structure and spectroscopic properties of the 1:1 complexes of substituted pyridines with benzoic acid and phenol derivatives in aprotic solvents are studied using B3LYP functional combined with the polarizable continuum model approximation. Two
Autor:
Gleb S. Denisov, Sergei N. Smirnov, Ilja G. Shenderovich, N. S. Golubev, Peter M. Tolstoy, Sven Macholl
Publikováno v:
Zeitschrift für Physikalische Chemie. 222:1225-1245
Low-temperature (193 K) 1H, 13C and 15N NMR spectra of blue- and red-shifting H-bonded complexes formed by fluoroform with various proton acceptors were measured. Experimental NMR parameters were plotted versus the ab initio calculated H-bond strengt
Autor:
Gerd Buntkowsky, Gerhard H. Findenegg, Hans-Heinrich Limbach, Dilek Akcakayiran, Ilja G. Shenderovich, Daniel Mauder
Publikováno v:
The Journal of Physical Chemistry B. 111:12088-12096
MCM-41 and SBA-15 silicas were studied by (29)Si solid-state NMR and (15)N NMR in the presence of (15)N-pyridine with the aim to formulate generic structural parameters that may be used as a checklist for atomic-scale structural models of this class
Autor:
Leticia Gonzalez, David N. Silverman, Ilja G. Shenderovich, Hans-Heinrich Limbach, Gleb S. Denisov, Shasad Sharif
Publikováno v:
The Journal of Physical Chemistry A. 111:6084-6093
The structure and geometry of hydrogen-bonded complexes formed between heterocyclic bases, namely, pyridine and 2,4,6-trimethylpyridine (collidine), and water were experimentally studied by NMR spectroscopy in frozen phase and in highly polar aprotic
Publikováno v:
Journal of Molecular Structure. 697:9-15
The solvent induced temperature dependence of NMR parameters (proton and fluorine chemical shifts, the two-bond scalar spin coupling constant across the hydrogen bridge, 2h J FF ) for dihydrogen trifluoride anion, (FH) 2 F − , in a polar aprotic so
Autor:
Dimitri N. Shchepkin, Ilja G. Shenderovich, Peter M. Tolstoy, Gleb S. Denisov, Sona M. Melikova, N. S. Golubev
Publikováno v:
Zeitschrift für Physikalische Chemie. 217:1549-1564
Using ab initio calculations of 1H, 19F magnetic shielding tensors of hydrogen difluoride ion as the functions of three coordinates of symmetry, an attempt is made to estimate the contributions of different vibrational isotope effects to H/D NMR isot
Autor:
Ilja G. Shenderovich, Thomas Lampke, Artemis Stamboulis, Jürgen Springer, Bernhard Wielage, Hans-Heinrich Limbach, Ibon Aranberri-Askargorta, Alexander Bismarck
Publikováno v:
Polymer Composites. 23:872-894
The surface characteristics of several natural fibers—flax, hemp and cellulose—were investigated using scanning electron microscopy, BET-surface area and zeta (ζ-) potential measurements. ζ-Potential measurements using the streaming potential m
Autor:
Gerd Buntkowsky, Ilja G. Shenderovich, Hans-Heinrich Limbach, Phillipe Lorente, Nikolai S. Golubev, Gleb S. Denisov
Publikováno v:
Magnetic Resonance in Chemistry. 39:S18-S29
A novel series of hydrogen-bonded solid 1:1 acid-base complexes of N-15-labeled 2,4,6-trimethylpyridine (collidine) with carboxylic acids and their hydrogen bond deuterated analogs were synthesized and studied by H-1 magic angle spinning (MAS) and N-
Autor:
Gleb S. Denisov, Ilja G. Shenderovich, Nikolai S. Golubev, Andrej P. Burtsev, Hans-Heinrich Limbach
Publikováno v:
Magnetic Resonance in Chemistry. 39:S91-S99
The influence of solvent polarity on the properties of hydrogen-bonded 1 : 1 complexes of 2,4,6-trimethylpyridine-15N with HF and DF, labeled below as FHN and FDN, has been studied by multinuclear magnetic resonance spectroscopy in the slow hydrogen