Syntheses of Twelve-Membered Ring Titana- and Zirconasiloxane Compounds and Their Properties as Ceramic Precursor

Autor:	Shin-Ichiro Kishiki, Yoshimoto Abe, Ken-Ichi Kubota, Takahiro Gunji
Rok vydání:	2002
Předmět:	Zirconium chemistry.chemical_element General Chemistry Ring (chemistry) chemistry.chemical_compound chemistry visual_art Polymer chemistry visual_art.visual_art_medium Organic chemistry Cubic zirconia Ceramic Amorphous silica Pyrolysis Tetrahydrofuran Titanium
Zdroj:	Bulletin of the Chemical Society of Japan. 75:537-543
ISSN:	1348-0634 0009-2673
Popis:	Cyclic metallasiloxanes, [(SiR1R2O)2M(acac)2O]2 (R1 = Me, R2 = OBut; R1 = R2 = OBut; R1 = OPri, R2 = OBut; M = Ti, Zr), were synthesized by the reaction of disiloxane-1,3-diols with diisopropoxidobis(2,4-pentanedionato)titanium(IV) or diisopropoxidobis(2,4-pentanedionato)zirconium(IV) in tetrahydrofuran. Cyclic titanasiloxanes and zirconasiloxanes have twelve-membered rings with the (Si–O–Si–O–Ti–O)2 linkages and (Si–O–Si–O–Zr–O)2 linkages, respectively. The pyrolysis of cyclic titanasiloxanes and zirconasiloxanes provided 2SiO2–TiO2 and 2SiO2–ZrO2 ceramics, respectively, which consist of amorphous silica and crystallized titania or zirconia.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a9a8cac6a9092cd45130317eaaeb1ccb https://doi.org/10.1246/bcsj.75.537 Zobrazit plný text záznamu