Synthesis of (NHC)Pd(salicylaldimine)Cl complexes through template-directed ortho-aromatic metaloxylation of NHC–palladacycles derived from arylimines

2017 ◽  
Vol 46 (15) ◽  
pp. 5003-5007 ◽  
Author(s):  
Jin Yang
Keyword(s):  
Butyl Hydroperoxide ◽  
Catalytic Activities ◽  
Aromatic Hydroxylation

NHC–palladacycles were ortho-aromatic metaloxylated in the presence of tert-butyl hydroperoxide, affording (NHC)Pd(salicylaldimine)Cl complexes. Furthermore, they also showed efficient catalytic activities toward the ortho-aromatic hydroxylation of arylimines.

Highly active and selective Ti-incorporated porous silica catalysts derived from grafting of titanium(iv)acetylacetonate

2015 ◽  
Vol 3 (29) ◽  
pp. 15280-15291 ◽  
Author(s):  
Miki Fukuda ◽  
Nao Tsunoji ◽  
Yuya Yagenji ◽  
Yusuke Ide ◽  
Shinjiro Hayakawa ◽  
...  
Keyword(s):  
Porous Silica ◽  
Butyl Hydroperoxide ◽  
Catalytic Activities ◽  
Highly Active

Ti(iv)acetylacetonate-grafted porous silicas showed high catalytic activities for the epoxidations of cyclohexene and limonene with tert-butyl hydroperoxide as an oxidant.

Photocatalytic activity of TiO2 synthesized by anodization and anodic spark deposition

MRS Advances ◽  
2020 ◽  
Vol 5 (61) ◽  
pp. 3141-3152
Author(s):  
Alma C. Chávez-Mejía ◽  
Génesis Villegas-Suárez ◽  
Paloma I. Zaragoza-Sánchez ◽  
Rafael Magaña-López ◽  
Julio C. Morales-Mejía ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Surface Characteristics ◽  
Amorphous Solids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Catalytic Activities ◽  
Anodic Spark Oxidation ◽  
Porous Surfaces ◽  
Scanning Electron

AbstractSeveral photocatalysts, based on titanium dioxide, were synthesized by spark anodization techniques and anodic spark oxidation. Photocatalytic activity was determined by methylene blue oxidation and the catalytic activities of the catalysts were evaluated after 70 hours of reaction. Scanning Electron Microscopy and X Ray Diffraction analysis were used to characterize the catalysts. The photocatalyst prepared with a solution of sulfuric acid and 100 V presented the best performance in terms of oxidation of the dye (62%). The electric potential during the synthesis (10 V, low potential; 100 V, high potential) affected the surface characteristics: under low potential, catalyst presented smooth and homogeneous surfaces with spots (high TiO2 concentration) of amorphous solids; under low potential, catalyst presented porous surfaces with crystalline solids homogeneously distributed.

Metal-Assisted Plasma Etching of Silicon: A Liquid-Free Alternative to MACE

2018 ◽  
Author(s):  
Julia Sun ◽  
Benjamin Almquist
Keyword(s):  
Liquid Phase ◽  
Plasma Etching ◽  
Chemical Etching ◽  
Gold Films ◽  
Metallic Films ◽  
Au Catalyst ◽  
Feed Concentration ◽  
Catalytic Activities ◽  
Metal Assisted Chemical Etching ◽  
Complex Nanostructures

For decades, fabrication of semiconductor devices has utilized well-established etching techniques to create complex nanostructures in silicon. Of these, two of the most common are reactive ion etching in the gaseous phase and metal-assisted chemical etching (MACE) in the liquid phase. Though these two methods are highly established and characterized, there is a surprising scarcity of reports exploring the ability of metallic films to catalytically enhance the etching of silicon in dry plasmas via a MACE-like mechanism. Here, we discuss a <u>m</u>etal-<u>a</u>ssisted <u>p</u>lasma <u>e</u>tch (MAPE) performed using patterned gold films to catalyze the etching of silicon in an SF<sub>6</sub>/O<sub>2</sub> mixed plasma, selectively increasing the rate of etching by over 1000%. The degree of enhancement as a function of Au catalyst configuration and relative oxygen feed concentration is characterized, along with the catalytic activities of other common MACE metals including Ag, Pt, and Cu. Finally, methods of controlling the etch process are briefly explored to demonstrate the potential for use as a liquid-free fabrication strategy.

Photochemical decomposition of t-butyl hydroperoxide; Photocatalytical effects of VO(II) and Co(III) 2,4-pentanedionates

1988 ◽  
Vol 53 (3) ◽  
pp. 497-505 ◽  
Author(s):  
Stanislav Luňák ◽  
Aleksandr I. Kokorin ◽  
Eva Mácová ◽  
Pavel Lederer
Keyword(s):  
Free Radical ◽  
Opposite Effect ◽  
Radical Intermediate ◽  
Butyl Hydroperoxide ◽  
Free Radical Intermediate ◽  
Catalytically Active ◽  
Photochemical Decomposition ◽  
Epr Signal

It has been found that [VO(acac)2] and [Co(acac)3] increase the rate of t-BuOOH photolysis, whereas [Fe(acac)3] has the opposite effect. Redox changes of the catalytically active [VO(acac)2] were followed using the EPR technique. An EPR signal from a free radical intermediate of photochemical decomposition of t-BuOOH was recorded, and the concentration of the intermediate was monitored during the reaction.

Tetrabutylammonium Iodide Catalyzed Synthesis of Allylic Ester with tert-Butyl Hydroperoxide as an Oxidant

2012 ◽  
Vol 14 (13) ◽  
pp. 3384-3387 ◽  
Author(s):  
Erbo Shi ◽  
Ying Shao ◽  
Shulin Chen ◽  
Huayou Hu ◽  
Zhaojun Liu ◽  
...  
Keyword(s):  
Butyl Hydroperoxide ◽  
Tert Butyl ◽  
Tert Butyl Hydroperoxide ◽  
Tetrabutylammonium Iodide
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