Remarkable thermodynamic stability toward hydrolysis of tripodal titanium alkoxidesElectronic supplementary information (ESI) available: syntheses and spectroscopic characterization of new compounds. See http://www.rsc.org/suppdata/cc/b3/b315092e/

2004 ◽  
pp. 468 ◽  
Author(s):  
Vesela Ugrinova ◽  
Gregory A. Ellis ◽  
Seth N. Brown



2007 ◽  
Vol 46 (11) ◽  
pp. 4642-4653 ◽  
Author(s):  
Mikhail Maliarik ◽  
Jeffrey K. Nagle ◽  
Andrey Ilyukhin ◽  
Elena Murashova ◽  
János Mink ◽  
...  


1998 ◽  
Vol 13 (9) ◽  
pp. 2602-2609 ◽  
Author(s):  
Yun-Hong Zhang ◽  
Chak K. Chan ◽  
John F. Porter ◽  
Wei Guo

Micro-Raman analysis was used to study the structure of TiO2 powders produced at low (260 °C) and high (600–900 °C) temperatures by vapor hydrolysis of titanium tetraisopropoxide (TTIP). Spatial inhomogeneity was discovered after the amorphous TiO2 powders produced at low temperature were calcined at 700, 800, and 900 °C for 3 h. The TiO2 powders produced at high temperatures (from 600 to 900 °C) were found to be spatially homogeneous and predominately anatase in structure. Small amounts of rutile and brookite are found for powders produced at 700, 800, and 900 °C after calcination at 600 °C for 3 h. The rutile and brookite impurities are believed to be concentrated on the surface of anatase based on a comparison of results of Raman and x-ray diffraction studies.



2011 ◽  
Vol 9 (1) ◽  
pp. 126-132 ◽  
Author(s):  
Ezzat Khan ◽  
Bernd Wrackmeyer

AbstractHydroboration of trialkyn-1-yl(organo)silanes with one equivalent and two equivalents of 9-borabicyclo[3.3.1]nonane, 9-BBN afford dialkyn-1-ylsilanes and alkyn-1-ylsilanes, respectively. The alkyn-1-ylsilane derivatives are stable at room temperature and can be store under dry argon for prolong period of time. These compounds are attractive materials for further rearrangements to afford novel 1-silacyclobutene derivatives bearing Si-alkenyl or Si-alkynyl functionalities. The hydroboration reaction is well controlled by the Si-R1 function, i.e., the starting silanes with R1 = Ph selectively afford hydroboration of one Si-C≡C bond with one equivalent of 9-BBN, leaving the other two functionalities untouched. Under mild reaction conditions (25°C), the starting silanes with R1 = Me lead to mixture containing dialkyn-1-ylsilane, alkyn-1-ylsilane and their respective 1-silacyclobutene derivatives. All new compounds are sensitive towards air and moisture and were studied by multinuclear magnetic resonance spectroscopy (1H, 13C, 11B, 29Si NMR) in solution.



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