scholarly journals Complexes of the tripodal phosphine ligands PhSi(XPPh2)3(X = CH2, O): synthesis, structure and catalytic activity in the hydroboration of CO2

2016 ◽  
Vol 45 (37) ◽  
pp. 14774-14788 ◽  
Author(s):  
Alicia Aloisi ◽  
Jean-Claude Berthet ◽  
Caroline Genre ◽  
Pierre Thuéry ◽  
Thibault Cantat
Keyword(s):  
Catalytic Activity ◽  
Coordination Chemistry ◽  
Electronic Properties ◽  
Phosphine Ligands ◽  
Phosphorus Ligands ◽  
The Impact

The coordination chemistry of Fe2+, Co2+and Cu+ions was explored with the ligands PhSi{CH2PPh2}3(1) and PhSi{OPPh2}3(2), so as to evaluate the impact of the electronic properties of the tripodal phosphorus ligands on the structure and reactivity of the corresponding complexes.

scholarly journals Unraveling the impact of the Pd nanoparticle@BiVO4/S-CN heterostructure on the photo-physical & opto-electronic properties for enhanced catalytic activity in water splitting and one-pot three-step tandem reaction

2019 ◽  
Vol 1 (4) ◽  
pp. 1395-1412 ◽  
Author(s):  
Subhajyoti Samanta ◽  
Biswarup Satpati ◽  
Rajendra Srivastava
Keyword(s):  
Catalytic Activity ◽  
Electronic Properties ◽  
Water Splitting ◽  
Tandem Reaction ◽  
One Pot ◽  
Pd Nanoparticle ◽  
The Impact

Influence of Pd NPs in the BiVO4/S-CN photocatalyst is demonstrated for the efficient water splitting and imine synthesis via tandem reaction.

scholarly journals N-Heterotricyclic cationic carbene ligands. Synthesis, reactivity and coordination chemistry

2018 ◽  
Vol 47 (15) ◽  
pp. 5196-5206 ◽  
Author(s):  
Javier Iglesias-Sigüenza ◽  
Cristina Izquierdo ◽  
Elena Díez ◽  
Rosario Fernández ◽  
José M. Lassaletta
Keyword(s):  
Coordination Chemistry ◽  
Metal Complexes ◽  
Electronic Properties ◽  
Carbene Ligands ◽  
Charge Delocalization ◽  
The Impact

Metal complexes based on cationic N-heterotricyclic carbenes have been synthesized and the impact of charge delocalization on their electronic properties has been analysed.

Fine-Tuning Electronic Properties of Luminescent Pt(II) Complexes via Vertex-Differentiated Coordination of Sterically Invariant Carborane-Based Ligands

2018 ◽  
Author(s):  
Kent O. Kirlikovali ◽  
Jonathan C. Axtell ◽  
Kierstyn Anderson ◽  
Peter I. Djurovich ◽  
Arnold L. Rheingold ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Metal Complexes ◽  
Electronic Properties ◽  
Fine Tuning ◽  
Fine Tune

We report the synthesis of two isomeric Pt(II) complexes ligated by doubly deprotonated 1,1′-bis(<i>o</i>-carborane) (<b>bc</b>). This work provides a potential route to fine-tune the electronic properties of luminescent metal complexes by virtue of vertex-differentiated coordination chemistry of carborane-based ligands.

Developing chiral phosphorus ligands for asymmetric hydrogenations

2010 ◽  
Vol 82 (7) ◽  
pp. 1429-1441 ◽  
Author(s):  
Wei Li ◽  
Guohua Hou ◽  
Xianfeng Sun ◽  
Gao Shang ◽  
Weicheng Zhang ◽  
...  
Keyword(s):  
Phosphine Ligands ◽  
Chiral Ligands ◽  
Phosphorus Ligands ◽  
Keto Esters ◽  
Asymmetric Hydrogenations ◽  
Dehydroamino Acid

Chiral rigid and electron-donating phosphocyclic phosphine ligands and modular atropisomeric biaryl phosphine ligands were designed and synthesized. The performance of these chiral ligands in the asymmetric hydrogenations of prochiral dehydroamino acid derivatives, enamides, imines, keto esters, and ketones has been demonstrated to be excellent.

The impact of charge state on catalytic activity of metallic nanostructures

2002 ◽  
Author(s):  
V. M. Kozhevin ◽  
D. A. Yavsin ◽  
M. A. Zabelin ◽  
Serguei A. Gurevich ◽  
Irina N. Yassievich ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Charge State ◽  
Metallic Nanostructures ◽  
The Impact

Atomic structures and electronic properties of Ta-doped 2H-NbSe2

RSC Advances ◽  
2014 ◽  
Vol 4 (101) ◽  
pp. 57541-57546 ◽  
Author(s):  
Hongping Li ◽  
Shuai Liu ◽  
Lin Chen ◽  
Jun Wu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Electronic Properties ◽  
First Principles ◽  
First Principles Calculations ◽  
Atomic Structures ◽  
The Impact ◽  
Ta Doping

First-principles calculations are conducted to investigate the impact of Ta doping on the atomistic structures and electronic properties of the technologically relevant 2H-NbSe2.

scholarly journals Human xylosyltransferase I and N-terminal truncated forms: functional characterization of the core enzyme

2006 ◽  
Vol 394 (1) ◽  
pp. 163-171 ◽  
Author(s):  
Sandra Müller ◽  
Jennifer Disse ◽  
Manuela Schöttler ◽  
Sylvia Schön ◽  
Christian Prante ◽  
...  
Keyword(s):  
Amino Acids ◽  
Catalytic Activity ◽  
Binding Capacity ◽  
Functional Characterization ◽  
Terminal Region ◽  
Binding Motif ◽  
Heparin Binding ◽  
Loss Of Function ◽  
The Impact

Human XT-I (xylosyltransferase I; EC 2.4.2.26) initiates the biosynthesis of the glycosaminoglycan linkage region and is a diagnostic marker of an enhanced proteoglycan biosynthesis. In the present study, we have investigated mutant enzymes of human XT-I and assessed the impact of the N-terminal region on the enzymatic activity. Soluble mutant enzymes of human XT-I with deletions at the N-terminal domain were expressed in insect cells and analysed for catalytic activity. As many as 260 amino acids could be truncated at the N-terminal region of the enzyme without affecting its catalytic activity. However, truncation of 266, 272 and 273 amino acids resulted in a 70, 90 and >98% loss in catalytic activity. Interestingly, deletion of the single 12 amino acid motif G261KEAISALSRAK272 leads to a loss-of-function XT-I mutant. This is in agreement with our findings analysing the importance of the Cys residues where we have shown that C276A mutation resulted in a nearly inactive XT-I enzyme. Moreover, we investigated the location of the heparin-binding site of human XT-I using the truncated mutants. Heparin binding was observed to be slightly altered in mutants lacking 289 or 568 amino acids, but deletion of the potential heparin-binding motif P721KKVFKI727 did not lead to a loss of heparin binding capacity. The effect of heparin or UDP on the XT-I activity of all mutants was not significantly different from that of the wild-type. Our study demonstrates that over 80% of the nucleotide sequence of the XT-I-cDNA is necessary for expressing a recombinant enzyme with full catalytic activity.

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