scholarly journals Reaction between Catalytic Activity and Ligand Species of Homogeneous Catalysts for Oxidative Polymerization of 2, 6-Xylenol

1969 ◽  
Vol 72 (8) ◽  
pp. 1739-1743 ◽  
Author(s):  
Takaaki ARAKAWA ◽  
Shizunori MIYAMOTO
Keyword(s):  
Catalytic Activity ◽  
Oxidative Polymerization ◽  
Homogeneous Catalysts ◽  
Ligand Species

Get Rid of the Shackle from Supports: Construct Recoverable Semi-Homogeneous Catalysts with Attapulgite

2021 ◽  
Author(s):  
Ruixiang Guo ◽  
Gang Wang ◽  
Wei Liu ◽  
Zibei Yao ◽  
Wei-Sheng Liu
Keyword(s):  
Catalytic Activity ◽  
Homogeneous Catalysts ◽  
Immobilized Catalyst ◽  
Novel Strategy ◽  
Adsorption Desorption

Traditionally, the immobilized catalyst sacrifices a part of catalytic activity for its recyclability. To reproduce the catalytic activity of active specie, we construct a novel strategy called "adsorption-desorption-adsorption". Since the...

scholarly journals Catalytic activity of V2O5 on aniline polymerization and the study of structural properties of poly(aniline)/V2O5 nano composite

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
A.Yelil Arasi ◽  
J.Juliet Latha Jeyakumari ◽  
B. Sundaresan ◽  
V. Dhanalakshmi ◽  
R. Anbarasan
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Oxidative Polymerization ◽  
Experimental Conditions ◽  
Nano Composite ◽  
Novel Approach ◽  
Polymerization Method ◽  
Thermal Stability Of ◽  
Poly Aniline ◽  
Aniline Polymerization

AbstractIt is a novel approach to the synthesize Poly(aniline) / V2O5 nano composite by free radical polymerization method under different experimental conditions such as variation in time, temperature and concentration of aniline and initiator. It was indicated that V2O5 itself could catalyze the oxidative polymerization of aniline. This can be attributed to the internal doping effect, which introduced flexibility to the rigid PANI backbone. TGA counseled the thermal stability of PANI. Through FTIR study, the structure of PANI was established. Comparison of polymerized aniline composite with two different initiators was done.

Hydroxy-substituted Cobalt Tetraphenylporphyrins as Electrocatalysts for the Reduction of O2

1997 ◽  
Vol 01 (02) ◽  
pp. 181-188 ◽  
Author(s):  
MAKOTO YUASA ◽  
BEAT STEIGER ◽  
FRED C. ANSON
Keyword(s):  
Aqueous Solution ◽  
Catalytic Activity ◽  
Pyrolytic Graphite ◽  
Porphyrin Ring ◽  
Homogeneous Catalysts ◽  
Graphite Electrodes ◽  
Adsorbed Molecules ◽  
Cobalt Porphyrins ◽  
Meso Position ◽  
Electron Reduction

The possible effects of the electron-donating properties of p-hydroxyphenyl groups on the catalytic activity of cobalt porphyrins toward the electro-reduction of O 2 were explored with three cobalt porphyrins having p-hydroxyphenyl substituents in the meso position of the porphyrin ring. The porphyrins were examined as electrocatalysts adsorbed on the surfaces of pyrolytic graphite electrodes in aqueous solution and as homogeneous catalysts dissolved in methanolic solutions. The adsorbed molecules exhibited a higher catalytic activity than those in solution and accomplished the reduction of a portion of the O 2 molecules reaching the electrode to H 2 O . However, the four-electron reduction was indirect, with H 2 O 2 being formed as an intermediate that was subsequently reduced. Although the introduction of the electron-donating p-hydroxyphenyl substituents on the porphyrin ring altered the catalytic activity of the cobalt porphyrins, the effect was not as great as can be obtained by coordinating ruthenium (II) complexes to π-accepting ligands in the meso position of the porphyrin ring.

scholarly journals Advances in Homogeneous Photocatalytic Organic Synthesis with Colloidal Quantum Dots

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 275 ◽  
Author(s):  
Dan-Yan Wang ◽  
Yu-Yun Yin ◽  
Chuan-Wei Feng ◽  
Rukhsana ◽  
Yong-Miao Shen
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Organic Synthesis ◽  
Semiconductor Quantum Dots ◽  
Organic Reactions ◽  
Colloidal Quantum Dots ◽  
Recent Application ◽  
Organic Transformations ◽  
Homogeneous Catalysts ◽  
Extinction Coefficients

Colloidal semiconductor quantum dots (QDs) have been proven to be excellent photocatalysts due to their high photostability, large extinction coefficients, and tunable optoelectrical properties, and have attracted extensive attention by synthetic chemists. These excellent properties demonstrate its promise in the field of photocatalysis. In this review, we summarize the recent application of QDs as homogeneous catalysts in various photocatalytic organic reactions. These meaningful works in organic transformations show the unique catalytic activity of quantum dots, which are different from other semiconductors.

DNA-encapsulated chain and wire-like β-MnO2 organosol for oxidative polymerization of pyrrole to polypyrrole

2015 ◽  
Vol 17 (7) ◽  
pp. 5474-5484 ◽  
Author(s):  
Sivasankara Rao Ede ◽  
S. Anantharaj ◽  
U. Nithiyanantham ◽  
Subrata Kundu
Keyword(s):  
Catalytic Activity ◽  
Room Temperature ◽  
Oxidative Polymerization

DNA-encapsulated chain and wire-like β-MnO2 organosol showed pronounce catalytic activity for the oxidative polymerization of pyrrole to polypyrrole at room temperature.

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