Formamide-Catalyzed Nucleophilic Substitutions: Mechanistic Insight and Rationalization of Catalytic Activity

ACS Catalysis ◽  
2020 ◽  
Vol 10 (19) ◽  
pp. 11567-11577 ◽  
Author(s):  
Corinna Kohlmeyer ◽  
André Schäfer ◽  
Peter H. Huy ◽  
Gerhard Hilt
Keyword(s):  
Catalytic Activity ◽  
Nucleophilic Substitutions ◽  
Mechanistic Insight

Mechanistic Insight toward the Roles of Anions and Cations in the Degradation of Poly (ethylene terephthalate) Catalyzed by Ionic Liquids

2021 ◽  
Author(s):  
Zhaoyang Ju ◽  
Lei Zhou ◽  
Xingmei Lu ◽  
Yao Li ◽  
Xiaoqian Yao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Ethylene Terephthalate ◽  
High Catalytic Activity ◽  
Mechanistic Insight ◽  
Poly Ethylene Terephthalate ◽  
Anions And Cations ◽  
Poly Ethylene

Ionic liquids (ILs) have shown high catalytic activity in the degradation of poly (ethylene terephthalate) (PET), but the effects of anions and cations as well as the mechanism remain ambiguous....

Construction of ZnO/ZIF-9 heterojunction photocatalyst: enhanced photocatalytic performance and mechanistic insight

2020 ◽  
Vol 44 (16) ◽  
pp. 6384-6393 ◽  
Author(s):  
Nannan Liu ◽  
Qigao Shang ◽  
Ke Gao ◽  
Qingrong Cheng ◽  
Zhiquan Pan
Keyword(s):  
Catalytic Activity ◽  
Charge Separation ◽  
Photocatalytic Performance ◽  
Mechanistic Insight

Heterostructure construction in photocatalysts is an effective method to improve their catalytic activity because of the remarkable role that the heterostructure plays in charge separation.

Efficient hydrogenolysis of aryl ethers over Ce-MOF supported Pd NPs under mild conditions: mechanistic insight using density functional theoretical calculations

2020 ◽  
Vol 10 (20) ◽  
pp. 6892-6901
Author(s):  
Ashish Kumar Kar ◽  
Surinder Pal Kaur ◽  
T. J. Dhilip Kumar ◽  
Rajendra Srivastava
Keyword(s):  
Catalytic Activity ◽  
Adsorption Energy ◽  
Density Functional ◽  
Theoretical Calculations ◽  
Desorption Energy ◽  
Mild Conditions ◽  
Mechanistic Insight ◽  
Aryl Ethers ◽  
Benzyl Phenyl Ether ◽  
Supported Pd

The significant Pd0 content and optimum bonding of the reactant & product (higher adsorption energy of benzyl phenyl ether and lower desorption energy for phenol) are responsible for the exceptional catalytic activity of Pd/Ce-MOF.

The origin of different driving forces between O–H/N–H functional groups in metal ligand cooperation: mechanistic insight into Mn(i) catalysed transfer hydrogenation

2020 ◽  
Vol 10 (1) ◽  
pp. 169-179 ◽  
Author(s):  
Li Zhou ◽  
Datai Liu ◽  
Haiyi Lan ◽  
Xiujian Wang ◽  
Cunyuan Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Functional Groups ◽  
Driving Forces ◽  
Transfer Hydrogenation ◽  
Bifunctional Catalysts ◽  
Mechanistic Insight ◽  
Insight Into ◽  
Metal Ligand

The origin of different catalytic activity between two structurally similar Lewis basic bifunctional catalysts.

Mechanistic insight into Ni-mediated decarbonylation of unstrained ketones: the origin of decarbonylation catalytic activity

2018 ◽  
Vol 5 (15) ◽  
pp. 2332-2339 ◽  
Author(s):  
Langhuan Jiang ◽  
Fang Huang ◽  
Qiong Wang ◽  
Chuanzhi Sun ◽  
Jianbiao Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Calculation Method ◽  
Dft Calculation ◽  
Catalytic Cycle ◽  
Mechanistic Insight ◽  
Insight Into

The origin of the Ni-mediated decarbonylation catalytic cycle of unstrained ketones was explored using the DFT calculation method.

Mechanistic Insight into the Catalytic Activity of ββα-Metallonucleases from Computer Simulations: Vibrio vulnificus Periplasmic Nuclease as a Test Case

ChemBioChem ◽  
2011 ◽  
Vol 12 (17) ◽  
pp. 2615-2622 ◽  
Author(s):  
Juan A. Bueren-Calabuig ◽  
Claire Coderch ◽  
Eva Rico ◽  
Antonio Jiménez-Ruiz ◽  
Federico Gago
Keyword(s):  
Catalytic Activity ◽  
Computer Simulations ◽  
Vibrio Vulnificus ◽  
Test Case ◽  
Mechanistic Insight ◽  
Insight Into

A Unique Class of Conditional sir2 Mutants Displays Distinct Silencing Defects in Saccharomyces cerevisiae

Genetics ◽  
2002 ◽  
Vol 162 (2) ◽  
pp. 721-736 ◽  
Author(s):  
Sandra N Garcia ◽  
Lorraine Pillus
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Catalytic Activity ◽  
Dna Binding Domain ◽  
Catalytic Core ◽  
Conserved Residues ◽  
Mutant Proteins ◽  
Mechanistic Insight ◽  
Chromatin Proteins ◽  
Insight Into ◽  
Subtelomeric Regions

Abstract Silencing provides a critical means of repressing transcription through the assembly and modification of chromatin proteins. The NAD+-dependent deacetylation of histones by the Sir2p family of proteins lends mechanistic insight into how SIR2 contributes to silencing. Here we describe three locus-specific sir2 mutants that have a spectrum of silencing phenotypes in yeast. These mutants are dependent on SIR1 for silencing function at the HM silent mating-type loci, display distinct phenotypes at the rDNA, and have dominant silencing defects at the telomeres. Telomeric silencing is restored if the mutant proteins are directly tethered to subtelomeric regions, via a Gal4p DNA-binding domain (GBD), or are recruited by tethered GBD-Sir1p. These sir2 mutations are found within conserved residues of the SIR2 family and lead to defects in catalytic activity. Since one of the mutations lies outside the previously defined minimal catalytic core, our results show that additional regions of Sir2p can be important for enzymatic activity and that differences in levels of activity may have distinct effects at the silenced loci.

Mechanistic insight into the hydrazine decomposition on Rh(111): effect of reaction intermediate on catalytic activity

2013 ◽  
Vol 15 (38) ◽  
pp. 16172 ◽  
Author(s):  
Zhigang Deng ◽  
Xiaoqing Lu ◽  
Zengqiang Wen ◽  
Shuxian Wei ◽  
Yunjie Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Intermediate ◽  
Mechanistic Insight ◽  
Hydrazine Decomposition ◽  
Insight Into

High resolution electron microscopy of lanthanum phosphate crystals

1978 ◽  
Vol 36 (1) ◽  
pp. 274-275
Author(s):  
J. C. Wheatley ◽  
J. M. Cowley
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
High Resolution ◽  
Petroleum Industry ◽  
High Resolution Electron Microscopy ◽  
Lanthanum Phosphate ◽  
Good Catalyst ◽  
Resolution Electron ◽  
Good Catalytic Activity ◽  
Physical And Chemical

Rare-earth phosphates are of particular interest because of their catalytic properties associated with the hydrolysis of many aromatic chlorides in the petroleum industry. Lanthanum phosphates (LaPO4) which have been doped with small amounts of copper have shown increased catalytic activity (1). However the physical and chemical characteristics of the samples leading to good catalytic activity are not known.Many catalysts are amorphous and thus do not easily lend themselves to methods of investigation which would include electron microscopy. However, the LaPO4, crystals are quite suitable samples for high resolution techniques.The samples used were obtained from William L. Kehl of Gulf Research and Development Company. The electron microscopy was carried out on a JEOL JEM-100B which had been modified for high resolution microscopy (2). Standard high resolution techniques were employed. Three different sample types were observed: 669A-1-5-7 (poor catalyst), H-L-2 (good catalyst) and 27-011 (good catalyst).

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