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Layered precursors for new zeolitic materials: Synthesis and characterization of B-RUB-39 and its condensation product B-RUB-41 |
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| Authors: | Antje Grü newald-Lü keHermann Gies,Ulrich Mü llerBilge Yilmaz,H. ImaiTakashi Tatsumi,B. XieFeng-Shou Xiao,Xinhe BaoWeiping Zhang,Dirk De Vos |
| Affiliation: | a Inst. f. Geologie, Mineralogie und Geophysik, Ruhr-Univsersität Bochum, 44780 Bochum, Germany b BASF SE, Chemicals Research and Engineering, 67056 Ludwigshafen, Germany c Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama, Japan d Department of Chemistry, Zhejiang University, Hangzhou, China e State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian, China f Centre for Surface Chemistry and Catalysis, K.U. Leuven, Leuven, Belgium |
| Abstract: | Condensation of layered silicate precursors leads to new, all silica zeolite frameworks. In order to introduce catalytic functionality, boron has been substituted into the silicate layer of RUB-39 in a single step synthesis process. Condensation of the silicate layer to the zeolite framework of RUB-41, RRO framework structure type, preserved B as constituent of the material. Analysis of structural details obtained from Rietveld analysis of powder diffraction data, 11B and 29Si NMR experiments of the as synthesized precursor as well as of the zeolite condensation product, and crystal chemical reasoning indicates segregation of B on one specific T-site. This T-site is buried in the silicate anionic layer of the precursor shielding the additional negative charge introduced by the trivalent T-atom. |
| Keywords: | RRO framework type B-substitution Rietveld structure analysis RUB-41 Topotactic condensation of layered precursors |
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