Efficient Catalyst for Acceptorless Alcohol Dehydrogenation: Interplay of Theoretical and Experimental Studies

ACS Catalysis ◽  
2014 ◽  
Vol 4 (3) ◽  
pp. 1010-1020 ◽  
Author(s):  
Guixiang Zeng ◽  
Shigeyoshi Sakaki ◽  
Ken-ichi Fujita ◽  
Hayato Sano ◽  
Ryohei Yamaguchi
Keyword(s):  
Experimental Studies ◽  
Efficient Catalyst ◽  
Alcohol Dehydrogenation ◽  
Acceptorless Alcohol Dehydrogenation

scholarly journals Supported Cobalt Catalysts for Acceptorless Alcohol Dehydrogenation

ChemPlusChem ◽  
2020 ◽  
Vol 85 (6) ◽  
pp. 1315-1324 ◽  
Author(s):  
Kamila Kaźmierczak ◽  
Catherine Pinel ◽  
Stéphane Loridant ◽  
Michèle Besson ◽  
Carine Michel ◽  
...  
Keyword(s):  
Cobalt Catalysts ◽  
Supported Cobalt Catalysts ◽  
Alcohol Dehydrogenation ◽  
Acceptorless Alcohol Dehydrogenation

Synthesis of a Water-Soluble Ruthenium Complex and Its Catalytic Activity for Acceptorless Alcohol Dehydrogenation in Aqueous Medium

Synlett ◽  
2018 ◽  
Vol 29 (12) ◽  
pp. 1644-1648 ◽  
Author(s):  
Senthilkumar Muthaiah ◽  
Anita Bhatia
Keyword(s):  
Catalytic Activity ◽  
Aqueous Medium ◽  
Ruthenium Complex ◽  
Water Soluble ◽  
Catalytic Cycle ◽  
Secondary Alcohols ◽  
Atom Economy ◽  
Hydrogen Acceptor ◽  
Alcohol Dehydrogenation ◽  
Acceptorless Alcohol Dehydrogenation

The synthesis of a ruthenium complex bearing a PN-chelating ligand is described. The complex, in the presence of KOH, enabled the synthesis of ketones from secondary alcohols in the absence of a hydrogen acceptor in aqueous medium. This synthetic protocol, which uses water as the medium, is green and has a high atom economy as it avoids the use of an acceptor and produces hydrogen as the sole ­byproduct. Mechanistic investigations revealed that the catalytic cycle involves a phosphine dissociative pathway.

scholarly journals Bulky PNP Ligands Blocking Metal-Ligand Cooperation Allow for Isolation of Ru(0), and Lead to Catalytically Active Ru Complexes in Acceptorless Alcohol Dehydrogenation

2021 ◽  
Author(s):  
Shubham Deolka ◽  
Robert R. Fayzullin ◽  
Eugene Khaskin
Keyword(s):  
Ru Complex ◽  
Catalytically Active ◽  
Ru Complexes ◽  
Alcohol Dehydrogenation ◽  
Complex Chemistry ◽  
Acceptorless Alcohol Dehydrogenation ◽  
Cis And Trans ◽  
Metal Ligand

We synthesized two 4Me-PNP ligands which block metal-ligand cooperation (MLC) with the Ru center and compared their Ru complex chemistry to their two traditional analogues used in acceptorless alcohol dehydrogenation catalysis. The corresponding 4Me-PNP complexes, which do not undergo dearomatization upon addition of base, allowed us to obtain rare, albeit unstable, 16 electron mono CO Ru(0) complexes. Reactivity with CO and H<sub>2</sub> allows for stabilization and extensive characterization of bis CO Ru(0) 18 electron and Ru(II) cis and trans dihydride species that were also shown to be capable of C(sp<sup>2</sup>)-H activation. Reactivity and catalysis are contrasted to non-methylated Ru(II) species, showing that an MLC pathway is not necessary, with dramatic differences in outcomes during catalysis between <sup>i</sup>Pr and <sup>t</sup>Bu PNP complexes within each of the 4Me and non-methylated backbone PNP series being observed. Unusual intermediates are characterized in one of the new and one of the traditional complexes, and a common catalysis deactivation pathway was identified.

scholarly journals A novel approach for the synthesis of nanostructured Ag3PO4 from phosphate rock: high catalytic and antibacterial activities

BMC Chemistry ◽  
2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Karim Dânoun ◽  
Rida Tabit ◽  
Abdelaziz Laghzizil ◽  
Mohamed Zahouily
Keyword(s):  
Phosphate Rock ◽  
Low Cost ◽  
Aqueous Media ◽  
Experimental Studies ◽  
Catalytic Efficiency ◽  
Antibacterial Activities ◽  
Efficient Catalyst ◽  
Novel Approach ◽  
Long Lifetime ◽  
Inorganic Precursors

Abstract Background Silver orthophosphate (Ag3PO4) has received enormous attention over the past few years for its higher visible light photocatalytic performance as well as for various organic pollutants degradation in aqueous media. Therefore, considerable efforts have been made to the synthesis of Ag3PO4 with high catalytic efficiency, long lifetime, and using low-cost inorganic precursors. Results This article describes our efforts to develop a novel approach to synthesize of nanostructured silver phosphate (Ag3PO4) using phosphate rock as alternative and natural source of PO43− precursor ions. The catalytic experimental studies showed that the nanostructured Ag3PO4 exhibited excellent catalytic activity for reduction of p-nitrophenol in the presence of NaBH4 at room temperature. Furthermore, the antibacterial studies revealed that the obtained Ag3PO4 possess significant effect against E. Coli and S. Aureus bacteria. Conclusion The obtained results make the nanostructured Ag3PO4 prepared from natural phosphate as a highly promising candidate to be used as efficient catalyst and antibacterial agent. Graphic Abstract

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