Cobalt complexes of tetradentate, bipyridine-based macrocycles: their structures, properties and photocatalytic proton reduction

2016 ◽  
Vol 45 (4) ◽  
pp. 1737-1745 ◽  
Author(s):  
E. Joliat ◽  
S. Schnidrig ◽  
B. Probst ◽  
C. Bachmann ◽  
B. Spingler ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Cobalt Complexes ◽  
Proton Reduction ◽  
New Type ◽  
Bipyridine Ligand

Photocatalytic proton reduction is demonstrated using a new type of cobalt catalyst with macrocyclic bis-bipyridine ligand frameworks, achieving turnover numbers up to 20 000 H2/Co.

Alpha and beta diimine cobalt complexes in isoprene polymerization: a comparative study

RSC Advances ◽  
2016 ◽  
Vol 6 (114) ◽  
pp. 113803-113814 ◽  
Author(s):  
Mohammed N. Alnajrani ◽  
Sultan A. Alshmimri ◽  
Omar A. Alsager
Keyword(s):  
Comparative Study ◽  
Cobalt Catalyst ◽  
Cobalt Complexes ◽  
Isoprene Polymerization

Isoprene was polymerized by diimine cobalt catalyst in the presence of DEAC to produce cis-1,4 and 3,4 polyisoprene.

scholarly journals Bimetallic Cooperativity in Proton Reduction with an Amido-Bridged Cobalt Catalyst

2017 ◽  
Vol 23 (39) ◽  
pp. 9272-9279 ◽  
Author(s):  
Kenneth K. Kpogo ◽  
Shivnath Mazumder ◽  
Denan Wang ◽  
H. Bernhard Schlegel ◽  
Adam T. Fiedler ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Proton Reduction

Light-Driven Proton Reduction in Aqueous Medium Catalyzed by a Family of Cobalt Complexes with Tetradentate Polypyridine-Type Ligands

2015 ◽  
Vol 54 (16) ◽  
pp. 7873-7884 ◽  
Author(s):  
Lianpeng Tong ◽  
Andrew Kopecky ◽  
Ruifa Zong ◽  
Kevin J. Gagnon ◽  
Mårten S. G. Ahlquist ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Cobalt Complexes ◽  
Proton Reduction

scholarly journals Enhancing H2 evolution performance of an immobilised cobalt catalyst by rational ligand design

2015 ◽  
Vol 6 (5) ◽  
pp. 2727-2736 ◽  
Author(s):  
Janina Willkomm ◽  
Nicoleta M. Muresan ◽  
Erwin Reisner
Keyword(s):  
Cobalt Catalyst ◽  
Ligand Design ◽  
H2 Evolution ◽  
Proton Reduction ◽  
Reduction Activity ◽  
Rational Ligand Design

Rational ligand design was employed to improve the proton reduction activity of an immobilised cobalt diimine–dioxime catalyst.

scholarly journals Photocatalytic proton reduction with ruthenium and cobalt complexes immobilized on fumed reversed-phase silica

2016 ◽  
Vol 7 (1) ◽  
pp. 436-445 ◽  
Author(s):  
C. Bachmann ◽  
B. Probst ◽  
M. Oberholzer ◽  
T. Fox ◽  
R. Alberto
Keyword(s):  
Water Splitting ◽  
Covalent Binding ◽  
Cobalt Complexes ◽  
Reversed Phase ◽  
Silica Particles ◽  
Molecular Water ◽  
Proton Reduction ◽  
Water Reduction ◽  
Hydrophobic Silica ◽  
Reduction Catalysts

Non-covalent binding of water reduction catalysts and photosensitizers to hydrophobic silica particles represents a general approach for heterogenizing molecular water splitting components.

Frontispiece: Bimetallic Cooperativity in Proton Reduction with an Amido-Bridged Cobalt Catalyst

2017 ◽  
Vol 23 (39) ◽  
Author(s):  
Kenneth K. Kpogo ◽  
Shivnath Mazumder ◽  
Denan Wang ◽  
H. Bernhard Schlegel ◽  
Adam T. Fiedler ◽  
...  
Keyword(s):  
Cobalt Catalyst ◽  
Proton Reduction

Modulation of electronic and redox properties in phenolate-rich cobalt(iii) complexes and their implications for catalytic proton reduction

2015 ◽  
Vol 44 (7) ◽  
pp. 3454-3466 ◽  
Author(s):  
Debashis Basu ◽  
Marco M. Allard ◽  
Fernando R. Xavier ◽  
Mary Jane Heeg ◽  
H. Bernhard Schlegel ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Cobalt Complexes ◽  
Redox Properties ◽  
Proton Reduction

The redox, spectroscopic and catalytic activity of a series of cobalt complexes with phenolate-rich environments was investigated. The complex [CoIII(LCl)MeOH] shows considerable proton reduction in MeCN:HOAc with TON = 10.8.

The Microstructure of Shock-Synthesized Diamond

1967 ◽  
Vol 25 ◽  
pp. 324-325
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
Preferred Orientation ◽  
High Magnification ◽  
Texture Pattern ◽  
Shock Process ◽  
New Type ◽  
Diffraction Diagram

A new type of synthetic industrial diamond formed by an explosive shock process has been recently developed by the Du Pont Company. This material consists of a mixture of two basically different forms, as shown in Figure 1: relatively flat and compact aggregates of acicular crystallites, and single crystals in the form of irregular polyhedra with straight edges.Figure 2 is a high magnification micrograph typical for the fibrous aggregates; it shows that they are composed of bundles of crystallites 0.05-0.3 μ long and 0.02 μ. wide. The selected area diffraction diagram (insert in Figure 2) consists of a weak polycrystalline ring pattern and a strong texture pattern with arc reflections. The latter results from crystals having preferred orientation, which shows that in a given particle most fibrils have a similar orientation.

New type electron gun with electrostatic and electromagnetic lenses

1978 ◽  
Vol 36 (1) ◽  
pp. 62-63
Author(s):  
T. Ichinokawa ◽  
H. Maeda
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Optimum Condition ◽  
Bias Voltage ◽  
Electron Gun ◽  
Charge Effect ◽  
Micro Fabrication ◽  
Maximum Brightness ◽  
New Type ◽  
The Ideal

I. IntroductionThermionic electron gun with the Wehnelt grid is popularly used in the electron microscopy and electron beam micro-fabrication. It is well known that this gun could get the ideal brightness caluculated from the Lengumier and Richardson equations under the optimum condition. However, the design and ajustment to the optimum condition is not so easy. The gun has following properties with respect to the Wehnelt bias; (1) The maximum brightness is got only in the optimum bias. (2) In the larger bias than the optimum, the brightness decreases with increasing the bias voltage on account of the space charge effect. (3) In the smaller bias than the optimum, the brightness decreases with bias voltage on account of spreading of the cross over spot due to the aberrations of the electrostatic immersion lens.In the present experiment, a new type electron gun with the electrostatic and electromagnetic lens is designed, and its properties are examined experimentally.

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