135225-24-0Relevant articles and documents
Fast, high-yielding syntheses of silsesquioxanes using acetonitrile as a reactive solvent
Pescarmona, Paolo P.,Van Der Waal, Jan C.,Maschmeyer, Thomas
, p. 978 - 983 (2004)
New and efficient methods for the synthesis of cyclopentyl- and cyclohexylsilsesquioxanes are described. In the case of cyclopentylsilsesquioxane, pure trisilanol (c-C5H9J 7-Si7O9(OH)3 was obtained selectively within 18 h in an isolated yield of 64%. The synthesis of cyclohexylsilsesquioxanes also gives high yields, but it is not selective towards a particular structural type [main products: (c-C6H 11)6Si6O9, (c-C6H 11J6Si6O8(OH)2, (c-C 6H11)7Si7O10OH and (c-C6H11)7Si7O9(OH) 3]. We discuss the crucial role of acetonitrile as a reactive solvent in these syntheses. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
T8-OSS-ethyldiphenylphosphine: A new functional oligosilsesquioxane ligand
Ruffieux, Vincent,Schmid, Guenter,Braunstein, Pierre,Rose, Jacky
, p. 900 - 903 (1997)
Oligosilsesquioxanes (OSS) may be considered as molecular sections of silica. The incompletely condensed (cyclopentyl)-T-(OH)3(T=SiO3,2) has been used to generate a phosphine-funetionalized T8-OSS system by reac
Preparation and reactivity of an O,O-chelating silsesquioxane-palladium complex
Tanabe, Makoto,Mutou, Kohji,Mintcheva, Neli,Osakada, Kohtaro
, p. 1211 - 1215 (2011)
An incompletely condensed silsesquioxane containing trisilanol (c-C 5H9)7Si7O9(OH) 3 reacts with [PdI2(bpy)] (bpy = 2,2′-bipyridine) in the presence of Ag2O to produce a palladium complex with an O,O-chelating silsesquioxanate ligand, [Pd{O11Si7(c-C 5H9)7(OH)}(bpy)] (1). The reaction of Ph 2SiClH with 1 in 2:1 ratio causes disilylations of the silsesquioxanate ligand, forming [PdCl2(bpy)]. Addition of p-cresol to a solution of 1 yields the trisilanol and [Pd(OC6H 4CH3-p)2(bpy)].
Oligomeric silsesquioxanes: Synthesis, characterization and selected applications
Pescarmona, Paolo P.,Maschmeyer, Thomas
, p. 583 - 596 (2001)
The synthesis, characterization and applications of oligomeric silsesquioxanes were discussed. These were synthesized by hydrolytic condensation of monosilanes. It was observed that high polarity solvents had favourable effect on the synthesis of silsesquioxanes. Another method involving cleavage of Si-O-Si bond of completely condensed silsesquioxanes to synthesize incompletely condensed silsesquioxanes was reported.
Organic-inorganic hybrid gels having functionalized silsesquioxanes
Kim, Kyung-Min,Chujo, Yoshiki
, p. 1384 - 1391 (2003)
Hybrid terpolymers consisting of polyhedral oligomeric silsesquioxanes (POSS), N,N-dimethylacrylamide, and bipyridine monomer were synthesized by a common radical polymerization method and their structures and thermal properties were studied by FT-IR, 1H NMR, DSC, TGA. The thermal stabilities of the hybrid terpolymers increased on increasing the content of POSS in the feed ratio. New hybrid gels containing POSS were prepared through the coordination of various metal ions to 2,2′-bipyridine-modified hybrid terpolymers. Highly concentrated solutions of terpolymers with iron(II) sulfate or ruthenium(III) chloride gave hybrid gels in good yields. On the other hand, no hybrid gel was formed with nickel(II) chloride even at much higher concentrations of nickel ions due to rapid ligand exchange reactions causing the polymer network to disappear as a result of a change in the nature of the coordination bonds from an intermolecular network to an intramolecular network. The degree of swelling and the thermal stability of the gels in various solvents were dependent on the content of POSS moiety in the hybrid gel and the ruthenium gel was considerably more stable than the iron and nickel gels. The hybrid gels containing POSS had properties characteristic of hydrogels as well as those of lipogel depending on the content of POSS in the hybrid gel. By analysis of the degree of swelling, it was concluded that the amount of POSS moiety in the hybrid gel has a significant effect on the degree of swelling in this system.
