Facile Top-Down Strategy for Direct Metal Atomization and Coordination Achieving a High Turnover Number in CO2 Photoreduction

2020 ◽  
Vol 142 (45) ◽  
pp. 19259-19267
Author(s):  
Yunxiang Li ◽  
Shengyao Wang ◽  
Xu-sheng Wang ◽  
Yu He ◽  
Qi Wang ◽  
...  
Keyword(s):  
Top Down ◽  
Turnover Number ◽  
High Turnover ◽  
Co2 Photoreduction ◽  
Metal Atomization

High Turnover Number and Rapid, Room-Temperature Amination of Chloroarenes Using Saturated Carbene Ligands

2000 ◽  
Vol 2 (10) ◽  
pp. 1423-1426 ◽  
Author(s):  
Shaun R. Stauffer ◽  
Sunwoo Lee ◽  
James P. Stambuli ◽  
Sheila I. Hauck ◽  
John F. Hartwig
Keyword(s):  
Room Temperature ◽  
Carbene Ligands ◽  
Turnover Number ◽  
High Turnover

scholarly journals Photocatalytic oxidation of benzene to phenol using dioxygen as an oxygen source and water as an electron source in the presence of a cobalt catalyst

2017 ◽  
Vol 8 (10) ◽  
pp. 7119-7125 ◽  
Author(s):  
Ji Won Han ◽  
Jieun Jung ◽  
Yong-Min Lee ◽  
Wonwoo Nam ◽  
Shunichi Fukuzumi
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Oxidation ◽  
Cobalt Catalyst ◽  
Electron Source ◽  
Light Irradiation ◽  
Turnover Number ◽  
High Turnover ◽  
Hydroxylation Of Benzene ◽  
Oxidation Of Benzene

The present study reports the first example of photocatalytic hydroxylation of benzene with O2 and H2O, both of which are the most green reagents, under visible light irradiation to afford a high turnover number.

scholarly journals Photocatalytic reduction of CO2 and H2O to CO and H2 with a cobalt chlorin complex adsorbed on multi-walled carbon nanotubes

2016 ◽  
Vol 6 (12) ◽  
pp. 4077-4080 ◽  
Author(s):  
Shoko Aoi ◽  
Kentaro Mase ◽  
Kei Ohkubo ◽  
Shunichi Fukuzumi
Keyword(s):  
Carbon Nanotubes ◽  
Photocatalytic Reduction ◽  
Turnover Number ◽  
High Turnover ◽  
Multi Walled Carbon Nanotubes ◽  
Reduction Of Co2 ◽  
Walled Carbon Nanotubes

The photocatalytic reduction of CO2 and H2O with triethylamine occurred using a cobalt(ii) chlorin complex adsorbed on multi-walled carbon nanotubes as a catalyst to yield CO and H2 with a high turnover number of 710.

Suzuki–Miyaura coupling with high turnover number using an N-acyl-N-heterocyclic carbene palladacycle precursor

2004 ◽  
Vol 45 (20) ◽  
pp. 3849-3853 ◽  
Author(s):  
Hector Palencia ◽  
Federico Garcia-Jimenez ◽  
James M. Takacs
Keyword(s):  
Turnover Number ◽  
High Turnover

Highly efficient and robust molecular water oxidation catalysts based on ruthenium complexes

2014 ◽  
Vol 50 (85) ◽  
pp. 12947-12950 ◽  
Author(s):  
Lei Wang ◽  
Lele Duan ◽  
Ying Wang ◽  
Mårten S. G. Ahlquist ◽  
Licheng Sun
Keyword(s):  
Catalytic Activity ◽  
Dicarboxylic Acid ◽  
Water Oxidation ◽  
Ruthenium Complexes ◽  
Molecular Water ◽  
Oxidation Catalysts ◽  
Turnover Number ◽  
High Turnover ◽  
Molecular Catalyst ◽  
Highly Efficient

The molecular catalyst Ru(bda)L2 (H2bda = 2,2′-bipyridine-6,6′-dicarboxylic acid, L = 6-bromophthalazine) shows excellent catalytic activity for water oxidation. By using Ce(NH4)2(NO3)6 as an oxidant, the catalyst reached a high turnover number TON = 100 000 in 3 hours.

High-turnover visible-light photoreduction of CO2 by a Re(i) complex stabilized on dye-sensitized TiO2

2014 ◽  
Vol 50 (34) ◽  
pp. 4462-4464 ◽  
Author(s):  
Eun-Gyeong Ha ◽  
Jeong-Ah Chang ◽  
Sung-Min Byun ◽  
Chyongjin Pac ◽  
Dong-Myung Jang ◽  
...  
Keyword(s):  
Visible Light ◽  
Turnover Number ◽  
High Turnover ◽  
Dye Sensitized

Higher photocatalytic CO2 conversion to CO with a turnover number of 435 was achieved by the ternary dye-sensitized systems comprising a dye/TiO2/Re platform.

Catalytic hydrogenation of functionalized amides under basic and neutral conditions

2015 ◽  
Vol 5 (2) ◽  
pp. 1181-1186 ◽  
Author(s):  
Jeremy M. John ◽  
Rasu Loorthuraja ◽  
Evan Antoniuk ◽  
Steven H. Bergens
Keyword(s):  
Catalytic Hydrogenation ◽  
Turnover Number ◽  
High Turnover ◽  
Neutral Conditions

A new, base-free high turnover number (TON) catalyst for hydrogenation of simple and functionalized amides is prepared by reacting [Ru(η3-C3H5)(Ph2P(CH2)2NH2)2]BF4 and BH4− under hydrogen.

scholarly journals Efficient and Selective N-Dimethylation of Amines with Functional Aldehydes Catalysed by Ru Nanoparticles Heterogeneous Catalyst

2021 ◽  
Author(s):  
Jianguo Liu ◽  
Yanpei Song ◽  
Xiang Wu ◽  
Longlong Ma
Keyword(s):  
Heterogeneous Catalyst ◽  
Low Cost ◽  
Secondary Amines ◽  
Primary Amines ◽  
Turnover Number ◽  
High Turnover ◽  
Ru Nanoparticles ◽  
Ready Availability ◽  
Bulk Chemical ◽  
Operational Simplicity

<p>N-methylated amines are essential bioactive compounds and have been widely used in the fine and bulk chemical industries, as well as in pharmaceuticals, agrochemicals, and dyes. Developing green, efficient, and low-cost catalysts for methylation of amines by using efficient and easily accessible methylating reagents is highly desired yet remains a significant challenge. Herein, we report the selective N-dimethylation of different functional amines with different functional aldehydes under easily handle-able and industrially applicable conditions using carbon-supported Ru nanoparticles (Ru/C) as a heterogeneous catalyst. A broad spectrum of amines could be efficiently converted to their corresponding N, N-dimethyl amines with good compatibility of various functional groups. This method is widely applicable to N-dimethylation of primary amines including aromatic, aliphatic amines with formaldehyde, and synthesis of tertiary amines from primary, secondary amines with different functional aldehydes. The advantage of this newly described method includes operational simplicity, high turnover number, the ready availability of the catalyst, and good functional group compatibility. This Ru/C catalyzed N-dimethylation reaction possibly proceed through a twice N-methylation reaction process.</p>

Asymmetric fluorination of indanone-2-carboxylates using a polystyrene-supported diphenylamine-linked bis(oxazoline) complex

2018 ◽  
Vol 16 (41) ◽  
pp. 7702-7710 ◽  
Author(s):  
Biao Wang ◽  
Yifeng Wang ◽  
Yidong Jiang ◽  
Mingming Chu ◽  
Suosuo Qi ◽  
...  
Keyword(s):  
High Activity ◽  
Continuous Flow ◽  
Turnover Number ◽  
High Turnover

A novel polystyrene-supported diphenylamine-linked bis(oxazoline) complex was developed for asymmetric fluorination in continuous flow, showing high activity and excellent enantioselectivity with a high turnover number.

Purification and Characterization of Hepatic P-450Iie1 from Acetone-Treated Mice

1993 ◽  
Vol 9 (3) ◽  
pp. 539-546 ◽  
Author(s):  
Vincenzo Longo ◽  
Silvia Menicagli ◽  
Michael Minks ◽  
Annalisa Santucci ◽  
Pier Giovanni Gervasi
Keyword(s):  
Polyclonal Antibodies ◽  
High Spin State ◽  
Purification And Characterization ◽  
Turnover Number ◽  
High Turnover ◽  
Hepatic Microsomes ◽  
Aminoacid Sequence ◽  
Reconstituted System ◽  
Cytochrome P 450

A new cytochrome P-450 isozyme (Mr = 52,000) was purified to apparent electrophoretic homogeneity from hepatic microsomes of mice treated with acetone and its biochemical, spectral, and immunological properties characterized. Several criteria indicated that the purified cytochrome was distinct from the known mouse P-450 isozymes. The absolute spectrum of its oxidized form indicated that it was in the high spin state. In a reconstituted system, it showed low catalytic activities towards 7-ethoxycoumarin, aminopyrine, and coumarin, whereas it catalyzed the oxidation of aniline, acetone, dimelhylnitrosoamine with high turnover number. The mouse enzyme was immunoreactive with polyclonal antibodies against rat P-45011E1 and exhibited an NH2-terminal aminoacid sequence with a high homology to that of rat-P-450IIEI. Based upon the above catalytic, spectral, immunological and structural properties, the purified mouse P-450 appears to be the ortholog of previously described P-450IIE1 (s) of other species.

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