Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Ursula Wilczok"'
Publikováno v:
Angewandte Chemie. 120:4018-4021
Publikováno v:
Microporous and Mesoporous Materials. 110:72-76
In the framework of this study and for the very first time interference microscopy has been applied to examine molecular uptake and release on only one segment rather than on the whole unity of an MFI crystal. We performed subsequent cycles of uptake
Autor:
D. Freude, E. E. Romanova, Wolfgang Schmidt, J.M. van Baten, Alexander G. Stepanov, Jörg Kärger, C. B. Krause, Ursula Wilczok, André Pampel, Rajamani Krishna
Publikováno v:
Solid State Nuclear Magnetic Resonance, 33(4), 65-71. Elsevier
The anisotropic behavior of C1–C6 alkane molecules adsorbed in MFI zeolite was studied by 1 H nuclear magnetic resonance (NMR) using single-pulse excitation, Carr–Purcell–Meiboom–Gill (CPMG) pulse sequence, Hahn echo (HE) pulse sequence, and
Autor:
Gernot Buth, Richard Goddard, Alexander Cepak, Olaf Medenbach, Wolfgang Schmidt, Ursula Wilczok, Claudia Weidenthaler
Publikováno v:
The Journal of Physical Chemistry B. 111:13538-13543
Single-crystal segments of tetra-n-propylammonium-templated Silicalite-1 and ZSM-5 were prepared by postsynthetic treatment of twinned MFI prisms. Microwave irradiation of the parent crystallites in alkaline solution containing hydrogen peroxide, fol
Autor:
Wolfgang Schmidt, Jörg Kärger, Friedrich Kremer, Christian Chmelik, Arati Varma, Ursula Wilczok, Dhananjai B. Shah, Lars Heinke
Publikováno v:
Chemistry of Materials. 19:6012-6019
Many recent investigations have confirmed the presence of surface barriers in a variety of zeolites. These surface barriers can have a significant effect on the overall rates of mass transfer and have the potential to significantly reduce the effecti
Autor:
Markus A. Schmidt, D. Konjhodzic, A. Dreier, Frank Marlow, Ursula Wilczok, A. Ladenburger, Helmut Bretinger, Manfred Eich
Publikováno v:
Applied Physics A. 81:425-432
The properties and structure of mesoporous silica films are investigated. Because of their extremely low refractive index (n=1.14), these films are interesting optical waveguide supports. The films have been synthesized by a template-modified sol–g
Publikováno v:
Advanced Materials. 13:307-310
Publikováno v:
Physical Chemistry Chemical Physics. 3:3486-3489
Hollow mesoporous silica fibers have been synthesized under acidic conditions in a two-phase static system. The fibers always have a circular internal architecture with hexagonally arranged channels running perpendicularly around the fiber axis. The
Autor:
Deborah J. Jones, Borislav Bogdanović, Uwe Kolb, Jacques Rozière, Lorraine E. Aleandri, Ursula Wilczok, Sara C. Huckett, Martin Lagarden, Christine Dürr
Publikováno v:
Chemistry - A European Journal. 3:1710-1718
The „platinum Grignard reagent” [Pt(MgCl)2(THF)x] (2), obtained by the reaction of PtCl2 and Et2Mg in a 1:2 molar ratio, as well as finely divided platinum (Pt*)—a possible intermediate formed during the preparation of 2—have been investigate
Autor:
Christine Dürr, Deborah J. Jones, Ursula Wilczok, Jacques Rozière, Lorraine E. Aleandri, Borislav Bogdanović
Publikováno v:
Advanced Materials. 8:600-604