scholarly journals Isomers in chlorido and alkoxido-substituted oxidorhenium(v) complexes: effects on catalytic epoxidation activity

2020 ◽  
Vol 49 (32) ◽  
pp. 11142-11149
Author(s):  
Jörg A. Schachner ◽  
Ferdinand Belaj ◽  
Nadia C. Mösch-Zanetti
Keyword(s):  
Catalytic Activity ◽  
Systematic Investigation ◽  
Catalytic Epoxidation ◽  
Cyclooctene Epoxidation

Pairs of stereoisomers and chlorido/alkoxido oxidorhenium(v) complexes are described and allow for a systematic investigation of the influence on catalytic activity in standard cyclooctene epoxidation.

Catalytic epoxidation of stilbenes with non-peripherally alkyl substituted carbonyl ruthenium phthalocyanine complexes

2012 ◽  
Vol 16 (04) ◽  
pp. 403-412 ◽  
Author(s):  
Charles A. Enow ◽  
Charlene Marais ◽  
Barend C.B. Bezuidenhoudt
Keyword(s):  
Catalytic Activity ◽  
Mass Spectroscopy ◽  
High Catalytic Activity ◽  
H Nmr ◽  
Catalytic Epoxidation ◽  
Metal Insertion ◽  
New Compounds ◽  
C Nmr

A number of novel carbonyl(1,4,8,11,15,18,22,25-octaalkylphthalocyaninato)-ruthenium(II) complexes were prepared by metal insertion with Ru3(CO)12. The new compounds have been characterized by1H NMR,13C NMR, IR, UV-vis and mass spectroscopy. This study demonstrated that this type of complexes and specifically carbonyl(1,4,8,11,15,18,22,25-octahexylphthalo-cyaninato)ruthenium(II) and carbonyl[1,4,8,11,15,18,22,25-octa(2-cyclohexylethyl)phthalocyaninato]-ruthenium(II), exhibit high catalytic activity and stability in the epoxidation of stilbenes with 2,6-dichloropyridine N-oxide as oxidant.

Synthesis, characterization and catalytic epoxidation properties of a new tellurotungstate(iv)-supported rhenium carbonyl derivative

2019 ◽  
Vol 48 (2) ◽  
pp. 628-634 ◽  
Author(s):  
Jingkun Lu ◽  
Xinyi Ma ◽  
Ping Wang ◽  
Junwei Feng ◽  
Pengtao Ma ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Conditions ◽  
Carbonyl Derivative ◽  
Catalytic Epoxidation ◽  
Rhenium Carbonyl ◽  
Epoxidation Of Alkenes

We synthesized a new tellurotungstate(iv)-supported rhenium carbonyl derivative, Na2H2[(CH3)4N]6[Te2W20O70{Re(CO)3}2]·20H2O (1). Additionally, compound 1 showed excellent catalytic activity in the selective epoxidation of alkenes under comparatively mild reaction conditions.

Inverse relationship of dimensionality and catalytic activity in CO2transformation: a systematic investigation by comparing multidimensional metal–organic frameworks

2017 ◽  
Vol 5 (30) ◽  
pp. 15961-15969 ◽  
Author(s):  
Robin Babu ◽  
Roshith Roshan ◽  
Yeongrok Gim ◽  
Yun Hee Jang ◽  
Jintu Francis Kurisingal ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Inverse Relationship ◽  
Metal Organic Frameworks ◽  
Catalytic Performance ◽  
Systematic Investigation ◽  
Cycloaddition Reactions ◽  
Metal Organic ◽  
Relationship Of

The correlation between dimensionality and active sites on deciding the catalytic performance of an MOF catalyst in CO2–epoxide cycloaddition reactions has been studied.

Comparative 1HNMR and UV-Visible Studies of Polyene Polymer Epoxidations Catalyzed by Iron(III), Manganese(III) and Chromium(III) Porphyrins

1998 ◽  
Vol 02 (01) ◽  
pp. 53-60 ◽  
Author(s):  
E. M. DAVORAS ◽  
R. DIAPER ◽  
A. DERVISSI ◽  
M. J. TORNARITIS ◽  
A. G. COUTSOLELOS
Keyword(s):  
Catalytic Activity ◽  
Catalytic Reaction ◽  
Manganese Porphyrin ◽  
Visible Spectroscopy ◽  
Two Phase ◽  
H Nmr ◽  
Catalytic Epoxidation ◽  
Uv Visible ◽  
Phase Systems

The catalytic epoxidation of cis-polybutadiene was studied in two-phase systems, CH 2 CI 2/ H 2 O and PhIO (solid)/ CH 2 Cl 2, using chlorochromium(III), chloromanganese(III) and chloroiron(III) tetraphenylporphyrin complexes as catalysts. Comparison of the catalytic activity of these three catalysts showed that the manganese porphyrin is the most suitable catalyst for this reaction. The results are based on reaction product ratios as determined by 1 H NMR . UV-Visible spectroscopy allowed monitoring of the metalloporphyrin evolution during the catalytic reaction.

Nickel-rich layered LiNi1−xMxO2(M = Mn, Fe, and Co) electrocatalysts with high oxygen evolution reaction activity

2015 ◽  
Vol 3 (32) ◽  
pp. 16604-16612 ◽  
Author(s):  
Veronica Augustyn ◽  
Soosairaj Therese ◽  
Travis C. Turner ◽  
Arumugam Manthiram
Keyword(s):  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Systematic Investigation ◽  
High Oxygen ◽  
Lithium Oxides

The first systematic investigation of a family of Ni-rich layered lithium oxides reveals tunable catalytic activity.

V2O5-WO3/TiO2 Catalysts for Low Temperature NH3 SCR: Catalytic Activity and Characterization

2016 ◽  
Vol 697 ◽  
pp. 275-278 ◽  
Author(s):  
Yu Xin Deng ◽  
Xin Chen ◽  
Rong Shao ◽  
Li Ming Hu ◽  
Jie Tang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Surface Area ◽  
Catalytic Reduction ◽  
Anatase Phase ◽  
Systematic Investigation ◽  
Acid Sites ◽  
Bet Surface Area ◽  
Reduction Of No

A systematic investigation of the effect of WO3 loading over V2O5/TiO2 catalysts was carried out for the selective catalytic reduction of NO by NH3. The characteristics were examined use BET surface area , X-ray diffractometry (XRD) , Temperature programmed desorption (TPD) of NH3 . It was fund that the WO3 species could interact with the TiO2 anatase phase to exhibits a high activity. With increasing WO3 content ,the activity of V-W/TiO2 for the selective catalytic reduction of NO by NH3 was improved at low temperatures in the range of 3～7%. The results showed that the adding of WO3 to V2O5/TiO2 could result in exposing acid sites of catalysts doped WO3 at low temperature. Furthermore, especially the catalytic activity of VW7Ti showed higher than 80% at 180 °C. However, the catalytic BET surface area and the mass of acid sites not play a leading role for improving low-temperature activity of VWTi in this paper.

Gel derived niobium–silicon mixed oxides: Characterization and catalytic activity for cyclooctene epoxidation

2008 ◽  
Vol 347 (2) ◽  
pp. 179-185 ◽  
Author(s):  
Antonio Aronne ◽  
Maria Turco ◽  
Giovanni Bagnasco ◽  
Gianguido Ramis ◽  
Elio Santacesaria ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mixed Oxides ◽  
Cyclooctene Epoxidation

Discrete and polymeric ensembles based on dinuclear molybdenum(vi) building blocks with adaptive carbohydrazide ligands: from the design to catalytic epoxidation

2020 ◽  
Vol 44 (19) ◽  
pp. 8085-8097 ◽  
Author(s):  
Edi Topić ◽  
Jana Pisk ◽  
Dominique Agustin ◽  
Martin Jendrlin ◽  
Danijela Cvijanović ◽  
...  
Keyword(s):  
Building Blocks ◽  
Catalytic Epoxidation ◽  
Polymeric Complexes ◽  
Cyclooctene Epoxidation

Discrete and polymeric ensembles based on dimolybdenum(vi) units with adaptive carbohydrazide ligands are described. The polymeric complexes are efficient catalysts for cyclooctene epoxidation under eco-friendly conditions.

Sulfated ZrO2 Supported on HMS Mesoporous Silica for Catalytic Epoxidation of Soybean Oil

2011 ◽  
Vol 233-235 ◽  
pp. 198-201
Author(s):  
Xue Feng Li ◽  
Wei Yun Guo ◽  
Huan Xin Gao ◽  
Qing Ling Chen
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Soybean Oil ◽  
Pore Structure ◽  
Calcination Temperature ◽  
Sulfated Zirconia ◽  
Catalytic Performance ◽  
Catalytic Epoxidation ◽  
Epoxy Value ◽  
Excellent Catalytic Performance

Sulfated zirconia supported on HMS mesoporous silica (SZ-HMS) was prepared and evaluated by catalytic epoxidation of soybean oil. The preparation procedure of SZ-HMS included soaking of HMS with ZrOCl2, and then sulfating with H2SO4. The samples were characterized by IR, XRD, and N2-adsorption. SZ-HMS kept the typical mesoporous crystalline as well as pore structure and exhibited an excellent catalytic performance for the epoxidation of soybean oil. The best catalytic activity, 4.4 of epoxy value, is acquired over the SZ-HMS sample prepared by 0.2 mol/L of ZrOCl2 concentration, 0.75 mol/L of H2SO4 concentration, and 823 K of calcination temperature.

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