Author
Eckhard Rikowski
Bio: Eckhard Rikowski is an academic researcher. The author has contributed to research in topics: Sodium cyanate & Sodium acetate. The author has an hindex of 1, co-authored 1 publications receiving 111 citations.
Papers
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TL;DR: In this paper, a partial rearrangement of octa-silsesquioxanes, R8(SiO1.5)8 (1), was performed to give species of the type R10 (SiO 1.5 )10 (II) and D2d-R12(Si O 1.5 )12 (III).
114 citations
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224 citations
TL;DR: The chemistry of polyhedral oligomeric silsesquioxanes (POSS) has taken a tremendous leap over the past decade as discussed by the authors, and new synthetic approaches have been developed, and new complexes based on elements throughout the periodic table have been synthesized and applied in catalytic processes such as alkene epoxidation, Oppenauer oxidation, alkene polymerization, Diels−Alders reactions and alkene metathesis.
Abstract: The chemistry of polyhedral oligomeric silsesquioxanes (POSS) has taken a tremendous leap over the past decade. New synthetic approaches have been developed, and new complexes based on elements throughout the periodic table have been synthesized and applied in catalytic processes such as alkene epoxidation, Oppenauer oxidation, alkene polymerization, Diels−Alders reactions and alkene metathesis. The use of silsesquioxane ligands as models for silica surface has provided an intimate knowledge of the reactions on the surface of this much-used support. New methods have been developed to incorporate silsesquioxanes into new materials. Encapsulation in siloxane polymers has provided precision supports for catalysts and controlled calcination has produced materials with well-defined metal oxide particles. This paper reviews the history and the latest developments of silsesquioxane chemistry. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
152 citations
TL;DR: In this article, the authors show that R8Si8O12 frameworks react selectively with aqueous Et4NOH to afford discrete incompletely-condensed silsesquioxanes.
115 citations
TL;DR: In this article, the synthesis of T8 silsesquioxane cages from trialkoxysilanes using tetra n-butylammonium fluoride is described.
Abstract: The synthesis of T8 silsesquioxane cages from trialkoxysilanes using tetra n-butylammonium fluoride is described. The yields are in the range 20–95%, which is a great improvement on other literature routes. This methodology enables a wide range of functionalised T8 cages to be prepared. The X-ray crystal structures of three new T8 cages, octacyclopentylsilsesquioxane, octaisobutylsilsesquioxane and octa(4-carboxymethyl-3,3-dimethylbutyl)silsesquioxane are also reported.
114 citations
TL;DR: A readily available octa(3-chloropropyl) polyhedral oligomeric silsesquioxane (POSS) framework was used to prepare octa (3-hydroxypropyl) POSS, which was further used as an initiator to synthesize star poly(ɛ-caprolactone) with POSS core via ring-opening polymerization catalyzed by Stannous (II) octanoate [Sn(Oct)2].
105 citations