01309nas a2200217 4500008004100000022001400041245014200055210006900197260007300266300001200339490000800351520045600359653001400815653002100829653003000850653002800880653001700908100002600925700001400951856012600965 2009 eng d a1387-181100aAcylation of nitrobenzene and substituted nitrobenzenes by benzoyl chloride using GaClx- and GaAlClx-grafted meporous Si-MCM-41 catalysts0 aAcylation of nitrobenzene and substituted nitrobenzenes by benzo aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR a360-3620 v1193 a

A acylation of nitrobenzene and substituted nitrobenzene by benzoyl chloride can be accomplished with good yield in a short reaction period (<= 3 h), even in the presence of moisture, using GaClx- and GaAlClx-grafted mesoporous silica (Si-MCM-41) catalyst. The catalyst is reusable/environmentally friendly. The presence of moisture in the catalyst has beneficial effect on the acylation reaction. (C) 2008 Elsevier Inc. All rights reserved.

10aAcylation10aBenzoyl chloride10aGaAlClx-grafted Si-MCM-4110aGaClx-grafted Si-MCM-4110anitrobenzene1 aChoudhary, Vasant, R.1 aJha, Rani uhttp://library.ncl.res.in/content/acylation-nitrobenzene-and-substituted-nitrobenzenes-benzoyl-chloride-using-gaclx-and-001862nas a2200241 4500008004100000022001400041245012200055210006900177260007600246300001200322490000800334520098100342653002001323653002301343653001101366653002101377653001701398653001601415653001401431100002201445700002201467856013101489 2011 eng d a0021-899500aDopant induced effect on electrocatalytic reduction of nitrobenzene using conducting polypyrrole thin film electrodes0 aDopant induced effect on electrocatalytic reduction of nitrobenz aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAPR a719-7240 v1203 a

Conducting polypyrrole electrodes were prepared by electrochemical polymerization of pyrrole on vacuum-metallized glass substrates. These electrodes were modified by doping with a range of metal halides as dopant ions having different electronegativity. Electrochemical reduction of nitrobenzene using these electrodes was studied by means of cyclic voltammetry technique in acetonitrile medium containing aqueous HClO(4) (0.1M) as supporting electrolyte. It was found that the electronegativity of the dopant ion played a very important role in the electrocatalytic activity. Polypyrrole doped with nickel chloride gave the highest anodic current at the reduction potential of nitrobenzene. The results were explained on the basis of charge transfer efficiency at the electrode-electrolyte interface, which was associated with the acceptor state created by the dopant in the semi-conducting polymer. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: 719-724, 2011

10acharge transfer10aconducting polymer10aDoping10aelectrocatalysis10anitrobenzene10apolypyrrole10areduction1 aAdhikari, Arindam1 aRadhakrishnan, S. uhttp://library.ncl.res.in/content/dopant-induced-effect-electrocatalytic-reduction-nitrobenzene-using-conducting-polypyrrole-002177nas a2200253 4500008004100000022001400041245016500055210006900220260000800289300001200297490000700309520127200316653002101588653001401609653001801623653001701641653002301658653002501681100002001706700002101726700002501747700002101772856013001793 2025 eng d a1066-852700aA detailed study on heat of reaction and heat rate determination of nitrobenzene hydrogenation to aniline reaction using power compensation reaction calorimeter0 adetailed study on heat of reaction and heat rate determination o cMAR a132-1410 v443 a

The present study reports experimental heat of reaction and heat rate data of nitrobenzene hydrogenation to aniline reaction with process parameter variation. A high-pressure isothermal power compensation reaction calorimeter was used for this work. A systematic and step-by-step procedure is also reported to determine the heat of reaction and heat rate for a highly exothermic reaction. The sensitivity of experimental molar heat of reaction (kJ/mol) and evolved heat rate (W) values for nitrobenzene hydrogenation reaction was analyzed for various important process parameters, such as temperature, pressure, substrate quantity, solvent quantity, catalyst quantity, RPM, and hydrogen feed rate. Nitrobenzene hydrogenation reactions were conducted using ethanol as solvent and 5% Pd/C as a catalyst with 55-65 degrees C temperature and 7-9 Bar absolute pressure range. More than 99.99% conversion of nitrobenzene to aniline was obtained, and no other by-products were found. The average experimental nitrobenzene hydrogenation heat of reaction of 21 different experiments was found to be -581.87 kJ/mol, and the maximum heat rate during the nitrobenzene hydrogenation reaction was found to be 16.16 W for experiments using 10 gm of nitrobenzene in solvent.

10aheat of reaction10aheat rate10aHydrogenation10anitrobenzene10apower compensation10areaction calorimeter1 aKumar, Rajendra1 aMane, Pradip, R.1 aShingote, Savita, K.1 aMali, Nilesh, A. uhttp://library.ncl.res.in/content/detailed-study-heat-reaction-and-heat-rate-determination-nitrobenzene-hydrogenation-aniline01967nas a2200241 4500008004100000022001400041245009700055210006900152260000800221300000800229490000800237520113300245653002201378653002401400653003501424653001701459653002901476100002901505700001901534700002201553700002801575856012201603 2025 eng d a1011-372X00aLiquid phase nitration of benzene to nitrobenzene using a mesoporous MoO3/Nb2O5 nanocatalyst0 aLiquid phase nitration of benzene to nitrobenzene using a mesopo cAPR a1410 v1553 a

This work reports the synthesis of a mesoporous MoO3/Nb2O5 catalyst by a facile co-precipitation method for the liquid phase nitration of benzene to nitrobenzene, which is a vital industrial reaction. Pristine Nb2O5 and MoO3/Nb2O5 nanocatalysts were characterized using various techniques, including powder XRD, N-2 adsorption-desorption, Raman, SEM/TEM, pyridine FT-IR, and XPS. The MoO3/Nb2O5 catalyst (10 wt% MoO3 with respect to Nb2O5) showed uniform dispersion of Mo and Nb species, higher amount of oxygen vacancies, and more Br & oslash;nsted acid sites, resulting in a 90% yield of nitrobenzene. In contrast, only 35 and 58% yields were obtained in the case of commercial Nb2O5 and nanosized Nb2O5, respectively. The liquid phase nitration of benzene was carried out using commercial 65% HNO3 as a nitrating agent without sulfuric acid. The mesoporous MoO3/Nb2O5 catalyst is structurally stable, as confirmed by the characterization of the spent catalyst. However, a gradual decrease in the yield of nitrobenzene was observed, which could be due to the leaching of MoO3 species from the catalyst surface.

10aBenzene nitration10aBronsted acid sites10aMesoporous MoO3/Nb2O5 Catalyst10anitrobenzene10aUniform metal dispersion1 aKalbande, Pavan, Narayan1 aSwapna, Bhattu1 aSudarsanam, Putla1 aUmbarkar, Shubhangi, B. uhttp://library.ncl.res.in/content/liquid-phase-nitration-benzene-nitrobenzene-using-mesoporous-moo3nb2o5-nanocatalyst02470nas a2200277 4500008004100000022001400041245014400055210006900199260000800268300001200276490000700288520152400295653001001819653001101829653003801840653001701878653002101895653002501916653001101941653002101952653003001973100001702003700002202020700002802042856012202070 2025 eng d a1022-552800aUltra-small Pd nanoparticles on SBA-15: an efficient catalyst for one-pot reductive alkylation of nitrobenzene with size-dependent activity0 aUltrasmall Pd nanoparticles on SBA15 an efficient catalyst for o cFEB a414-4290 v683 a

One-pot reductive alkylation of nitrobenzene with alcohol is an important organic synthesis reaction to form 2 degrees amines. In the present work, we have demonstrated that Pd/SBA-15 can be an effective catalytic system for this reaction. We have designed ultra-small Pd nanoparticles supported on SBA-15 for the synthesis of secondary amine, N-ethylaniline, through one-pot reductive alkylation of nitrobenzene with ethanol under ambient conditions. Ethanol functions both as the alkylating agent and the solvent in this process. The reaction is driven by the simultaneous hydrogenation of nitrobenzene to aniline, dehydrogenation of ethanol to aldehyde, and condensation of aniline and acetaldehyde to form N-ethylaniline. The size of the Pd nanoparticles plays a decisive role in the product selectivity. The undercoordinated sites present on ultra-small Pd NPs can facilitate ethanol dehydrogenation to acetaldehyde, thereby enhancing the selectivity towards N-ethylaniline compared to larger Pd nanoparticles. We have also studied the effect of different mesoporous supports such as SBA-15, MCM-41, and KIT-6 on the N-ethylaniline selectivity and found that SBA-15 was most selective. We have demonstrated that by carefully designing the catalyst such as controlling the Pd NPs size to obtain the maximum quantity of undercoordinated sites and choosing suitable support, the aliphatic alcohols can also be used for reductive alkylation of nitrobenzene in one-pot with optimum yields of N-alkylaniline.

10aKIT-610aMCM-4110aModified deposition precipitation10anitrobenzene10aPd nanoparticles10aReductive alkylation10aSBA-1510asecondary amines10aUndercoordinated Pd sites1 aSoni, Yogita1 aPhilip, Milda, C.1 aVinod, Chathakudath, P. uhttp://library.ncl.res.in/content/ultra-small-pd-nanoparticles-sba-15-efficient-catalyst-one-pot-reductive-alkylation