Room Temperature Oxidative C−H Functionalization for Selective Construction of Fused Heterocycles by a Low N-Doped Graphitic Carbon/HFIP Catalyst System

2020 ◽  
Author(s):  
He Zhao ◽  
Jialu Sun ◽  
Rongqing Guan ◽  
Qinghao Song ◽  
Huanfeng Jiang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Catalyst System ◽  
Graphitic Carbon ◽  
Fused Heterocycles

scholarly journals The Role of Graphitic Carbon Nitride in the Formulation of Copper-Free Friction Composites Designed for Automotive Brake Pads

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 123
Author(s):  
Vlastimil Matějka ◽  
Mara Leonardi ◽  
Petr Praus ◽  
Giovanni Straffelini ◽  
Stefano Gialanella
Keyword(s):  
Carbon Nitride ◽  
Room Temperature ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Main Role ◽  
Brake Pads ◽  
Pin On Disc ◽  
Brake Lining ◽  
Automotive Brake

In this study, graphitic carbon nitride (g-C3N4, labelled as gCN) was tested in the formulation of copper-free (Cu-free) friction mixtures, which are potentially interesting for brake pad manufacturing. Three formulations of friction composites were prepared starting from a common Cu-free master batch: (i) without graphite, (ii) with graphite and (iii) with gCN. The mixtures were pressed in the form of pins by hot-press moulding. The friction-wear performance of the prepared pins was investigated using a pin-on-disc (PoD) test at room temperature (RT), high temperature (HT) (400 °C) and, again, at room temperature (H-RT). The values of the friction coefficient (µ) for the composites with gCN (or graphite) were as follows: (i) RT test, µRT = 0.52 (0.47); (ii) HT test, µHT = 0.37 (0.37); (iii) RT after the HT tests, µH-RT = 0.49 (0.39). With respect to wear resistance, the samples with graphite performed better than the samples without this solid lubricant. To the best of our knowledge, this is the first report regarding the evaluation of the role of gCN in friction composites designed for automotive brake lining applications. The results indicate the main role of gCN as a soft abrasive.

‘On-water’ organic synthesis: a green, highly efficient, low cost and reusable catalyst system for biaryl synthesis under aerobic conditions at room temperature

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 50655-50659 ◽  
Author(s):  
Bishwajit Saikia ◽  
Preeti Rekha Boruah ◽  
Abdul Aziz Ali ◽  
Diganta Sarma
Keyword(s):  
Organic Synthesis ◽  
Room Temperature ◽  
Low Cost ◽  
Suzuki Reaction ◽  
Catalyst System ◽  
Reusable Catalyst ◽  
Wide Range ◽  
Biaryl Synthesis ◽  
Phenylboronic Acids ◽  
Operational Simplicity

The PdCl2/sucrose/K2CO3/H2O system showed the superb catalytic activity towards the Suzuki reaction of a wide range of aryl/heteroaryl halides with diverse phenylboronic acids at room temperature with operational simplicity and shorter reaction time.

Synthesis of Graphitic Carbon Nitride in Porous Silica Glass

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940042 ◽  
Author(s):  
E. B. Chubenko ◽  
A. V. Baglov ◽  
E. S. Lisimova ◽  
V. E. Borisenko
Keyword(s):  
Silica Glass ◽  
Carbon Nitride ◽  
Room Temperature ◽  
Porous Silica ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Facile Synthesis ◽  
Macroporous Silica ◽  
Porous Silica Glass ◽  
Luminescent Centers

We developed and studied facile synthesis of graphitic carbon nitride in macroporous silica glass matrix. Melamine was used as a precursor. The synthesis was performed in a closed air ambience at 400–600∘C. It was found that the synthesized material was characterized with a broadband room-temperature photoluminescence in the range of 350–750[Formula: see text]nm with the peak shifting from to 445[Formula: see text]nm to 702[Formula: see text]nm when the temperature of the synthesis was increased from [Formula: see text]C to [Formula: see text]C while the intensity of the luminescence was decreased. The nature of the luminescent centers and possible applications of the synthesized material are discussed.

ChemInform Abstract: An Examination of the Palladium/Mor-DalPhos Catalyst System in the Context of Selective Ammonia Monoarylation at Room Temperature.

ChemInform ◽  
2013 ◽  
Vol 44 (25) ◽  
pp. no-no
Author(s):  
Pamela G. Alsabeh ◽  
Rylan J. Lundgren ◽  
Robert McDonald ◽  
Carin C. C. Johannsson Seechurn ◽  
Thomas J. Colacot ◽  
...  
Keyword(s):  
Room Temperature ◽  
Catalyst System

Room Temperature Catalyst System for the Hydroarylation of Olefins

2016 ◽  
Vol 18 (19) ◽  
pp. 5034-5037 ◽  
Author(s):  
Siu Yin Lee ◽  
Alexander Villani-Gale ◽  
Chad C. Eichman
Keyword(s):  
Room Temperature ◽  
Catalyst System
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