ChemInform Abstract: Selective Hydrogenation of Nitroaromatics by Colloidal Iridium Nanoparticles.

ChemInform ◽  
2014 ◽  
Vol 45 (45) ◽  
pp. no-no
Author(s):  
Md. J. Sharif ◽  
Prasenjit Maity ◽  
Seiji Yamazoe ◽  
Tatsuya Tsukuda
Keyword(s):  
Selective Hydrogenation ◽  
Iridium Nanoparticles

Thermoregulated phase-transfer iridium nanoparticle catalyst: highly selective hydrogenation of the CO bond for α,β-unsaturated aldehydes and the CC bond for α,β-unsaturated ketones

2016 ◽  
Vol 6 (20) ◽  
pp. 7386-7390 ◽  
Author(s):  
Wenjiang Li ◽  
Yanhua Wang ◽  
Pu Chen ◽  
Min Zeng ◽  
Jingyang Jiang ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Phase Transfer ◽  
Unsaturated Ketones ◽  
Iridium Nanoparticles ◽  
Unsaturated Aldehydes ◽  
Aldehydes And Ketones ◽  
Nanoparticle Catalyst

Thermoregulated phase-transfer iridium nanoparticles exhibited a totally different hydrogenation orientation for α,β-unsaturated aldehydes and ketones.

scholarly journals Selective Hydrogenation of Nitroaromatics by Colloidal Iridium Nanoparticles

2013 ◽  
Vol 42 (9) ◽  
pp. 1023-1025 ◽  
Author(s):  
Md. J. Sharif ◽  
Prasenjit Maity ◽  
Seiji Yamazoe ◽  
Tatsuya Tsukuda
Keyword(s):  
Selective Hydrogenation ◽  
Iridium Nanoparticles

Poly(Vinylpyrrolidone)-Anchored Iridium Nanoparticles Supported on Al2O3 as Ultra-Selective Catalyst for the Hydrogenation of p-Chloronitrobenzene

2013 ◽  
Vol 726-731 ◽  
pp. 683-686 ◽  
Author(s):  
Guang Yin Fan
Keyword(s):  
Great Improvement ◽  
Selective Hydrogenation ◽  
Catalytic Properties ◽  
Halogen Bond ◽  
Side Reaction ◽  
Colloidal Nanoparticles ◽  
Complete Conversion ◽  
Selective Catalyst ◽  
Iridium Nanoparticles ◽  
Lower Temperature

Poly (vinylpyrrolidone)-anchored iridium nanoparticles (PVP-Ir) were prepared via the reduction of H2IrCl6·nH2O in ethanol/water mixtures. The catalytic properties of the colloidal nanoparticles that dispersed on Al2O3(PVP-Ir/Al2O3) were investigated in the selective hydrogenation ofp-chloronitrobenzene (p-CNB) top-chloroaniline (p-CAN). The results indicated that the selectivity top-CAN remained on the level of 100 % at complete conversion ofp-CNB at lower temperature of 288 K. Moreover, the side reaction of hydrogenolysis of the carbon-halogen bond was completely inhibited in the absence of promoters and inhibitors. The great improvement on activity and selectivity of PVP-Ir/Al2O3was attributed to the highly and homogeneously dispersion of the iridium nanoparticles on the support Al2O3and the addition of appropriate amount of water in organic solvents

Effective Hydrogenation of p-Chloronitrobenzene over Iridium Nanoparticles Entrapped in Aluminum Oxy-Hydroxide under Mild Conditions

2014 ◽  
Vol 881-883 ◽  
pp. 267-270 ◽  
Author(s):  
Guang Yin Fan ◽  
Chun Zhang
Keyword(s):  
Hydrogen Bond ◽  
Selective Hydrogenation ◽  
Sol Gel ◽  
The Other ◽  
Hydrogenation Product ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Iridium Nanoparticles ◽  
Mild Conditions ◽  
Surface Hydroxyl Groups

The Ir/AlO(OH) catalyst was prepared by sol-gel method and used for selective hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroniamine (p-CAN). The mechanism of p-CNB hydrogenation over the catalyst was discussed. The hydrogen bond between the surface hydroxyl groups of the catalyst and the nitrogen present in p-CNB facilitated the hydrogenation of nitro group. On the other hand, the formation of hydrogen bond between the hydrogenation product and water promotes the rapid desorption of the hydrogenation product on the surface of the catalyst. Thus the activity and selectivity were greatly promoted.

Selective Hydrogenation of Benzene to Cyclohexene over Ru-Zn Catalyst with Nanosized Zirconia as Dispersant

2010 ◽  
Vol 31 (2) ◽  
pp. 150-152
Author(s):  
Zhongyi LIU ◽  
Haijie SUN ◽  
Dongbin WANG ◽  
Wei GUO ◽  
Xiaoli ZHOU ◽  
...  
Keyword(s):  
Selective Hydrogenation
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