Templated high-yield synthesis of Pt nanorods enclosed by high-index {311} facets for methanol selective oxidation

2013 ◽  
Vol 1 (25) ◽  
pp. 7316 ◽  
Author(s):  
Lini Yang ◽  
Xuehua Song ◽  
Menglu Qi ◽  
Lixin Xia ◽  
Mingshang Jin
Keyword(s):  
Selective Oxidation ◽  
High Index ◽  
High Yield ◽  
Methanol Selective Oxidation

scholarly journals Pd/Au Based Catalyst Immobilization in Polymeric Nanofibrous Membranes via Electrospinning for the Selective Oxidation of 5-Hydroxymethylfurfural

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 45 ◽  
Author(s):  
Danilo Bonincontro ◽  
Francesco Fraschetti ◽  
Claire Squarzoni ◽  
Laura Mazzocchetti ◽  
Emanuele Maccaferri ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Large Scale ◽  
Catalytic Performance ◽  
High Yield ◽  
Key Factors ◽  
Hydroxymethyl Furfural ◽  
Catalyst Immobilization ◽  
Polymeric Component ◽  
Furandicarboxylic Acid ◽  
Nanofibrous Membranes

Innovative nanofibrous membranes based on Pd/Au catalysts immobilized via electrospinning onto different polymers were engineered and tested in the selective oxidation of 5-(hydroxymethyl)furfural in an aqueous phase. The type of polymer and the method used to insert the active phases in the membrane were demonstrated to have a significant effect on catalytic performance. The hydrophilicity and the glass transition temperature of the polymeric component are key factors for producing active and selective materials. Nylon-based membranes loaded with unsupported metal nanoparticles were demonstrated to be more efficient than polyacrylonitrile-based membranes, displaying good stability and leading to high yield in 2,5-furandicarboxylic acid. These results underline the promising potential of large-scale applications of electrospinning for the preparation of catalytic nanofibrous membranes to be used in processes for the conversion of renewable molecules.

scholarly journals Selective benzylic C–H monooxygenation mediated by iodine oxides

2019 ◽  
Vol 15 ◽  
pp. 602-609
Author(s):  
Kelsey B LaMartina ◽  
Haley K Kuck ◽  
Linda S Oglesbee ◽  
Asma Al-Odaini ◽  
Nicholas C Boaz
Keyword(s):  
Selective Oxidation ◽  
High Yield ◽  
Hypervalent Iodine ◽  
Iodine Species ◽  
Mechanistic Analysis ◽  
Substrate Tolerance ◽  
Iodine Oxides ◽  
Moderate Yield

A method for the selective monooxdiation of secondary benzylic C–H bonds is described using an N-oxyl catalyst and a hypervalent iodine species as a terminal oxidant. Combinations of ammonium iodate and catalytic N-hydroxyphthalimide (NHPI) were shown to be effective in the selective oxidation of n-butylbenzene directly to 1-phenylbutyl acetate in high yield (86%). This method shows moderate substrate tolerance in the oxygenation of substrates containing secondary benzylic C–H bonds, yielding the corresponding benzylic acetates in good to moderate yield. Tertiary benzylic C–H bonds were shown to be unreactive under similar conditions, despite the weaker C–H bond. A preliminary mechanistic analysis suggests that this NHPI-iodate system is functioning by a radical-based mechanism where iodine generated in situ captures formed benzylic radicals. The benzylic iodide intermediate then solvolyzes to yield the product ester.

scholarly journals Convergent synthesis of the tetrasaccharide repeating unit of theO-antigen ofShigella boydiitype 9

2011 ◽  
Vol 7 ◽  
pp. 1182-1188
Author(s):  
Abhishek Santra ◽  
Anup Kumar Misra
Keyword(s):  
Functional Groups ◽  
Selective Oxidation ◽  
Primary Alcohol ◽  
High Yield ◽  
Carboxylic Group ◽  
Convergent Synthesis ◽  
Shigella Boydii ◽  
Excellent Yield ◽  
Convenient Synthesis

A convenient synthesis of the tetrasaccharide repeating unit of theO-antigen ofShigella boydiitype 9 has been achieved in excellent yield using a [2 + 2] block glycosylation strategy. TEMPO-mediated selective oxidation of the primary alcohol of the tetrasaccharide derivative8to the carboxylic group followed by deprotection of the functional groups furnished target tetrasaccharide1as its 4-methoxyphenyl glycoside in high yield.

High-Index-Contrast Single Output Teardrop Laser Fabricated Via Oxygen-Enhanced Non-Selective Oxidation

2010 ◽  
Author(s):  
Christopher S. Seibert ◽  
Wangqing Yuan ◽  
Douglas C. Hall ◽  
Xiangning Luo ◽  
Tony Moretti ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
High Index ◽  
Single Output ◽  
Index Contrast ◽  
High Index Contrast

Methanol-Selective Oxidation Pathways on Au Surfaces: A First-Principles Study

2014 ◽  
Vol 118 (31) ◽  
pp. 17511-17520 ◽  
Author(s):  
Lei Wang ◽  
Chaozheng He ◽  
Wenhua Zhang ◽  
Zhenyu Li ◽  
Jinlong Yang
Keyword(s):  
Selective Oxidation ◽  
First Principles ◽  
First Principles Study ◽  
Methanol Selective Oxidation

Methanol selective oxidation to dimethoxymethane on H3PMo12O40/SBA-15 supported catalysts

2009 ◽  
Vol 26 (3) ◽  
pp. 902-906 ◽  
Author(s):  
Heqin Guo ◽  
Debao Li ◽  
Haicheng Xiao ◽  
Jianli Zhang ◽  
Wenhuai Li ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Supported Catalysts ◽  
Methanol Selective Oxidation

High yield purification of multiwalled carbon nanotubes by selective oxidation during thermal annealing

Carbon ◽  
2001 ◽  
Vol 39 (5) ◽  
pp. 655-661 ◽  
Author(s):  
Young Soo Park ◽  
Young Chul Choi ◽  
Keun Soo Kim ◽  
Dong-Chul Chung ◽  
Dong Jae Bae ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Selective Oxidation ◽  
Thermal Annealing ◽  
High Yield ◽  
Multiwalled Carbon
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