Sahu Jain College

Najībābād, India

Sahu Jain College

Najībābād, India
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Kumar G.,Institute of Chemical Technology | Kumar D.,Sahu Jain College
Journal of Molecular Structure | Year: 2016

The paper presents the synthesis of macrocyclic complexes [{M(C52H36N12O4)X}X2] of Cr(III), Mn(III) and Fe(III) with Schiff base ligand (C52H36N12O4) obtained through the condensation of 1,4-dicarbonyl phenyl dihydrazide with 1,2-di(1H-indol-1-yl)ethane-1,2-dione. The newly formed Schiff base and its complexes have been characterized with the help of elemental analysis, condensation measurements, magnetic measurements and their structure configuration have been determined by various spectroscopic (electronic, IR, 1H NMR, 13C NMR, GCMS) techniques. The electronic spectra of the complexes indicate a five coordinate square pyramidal geometry of the center metal ion. These metal complexes and ligand were tested for their anti-inflammation and antimicrobial inhibiting potential and compared with standard drugs Phenyl butazone (anti-inflammation), Imipenem (antibacterial) and Miconazole (antifungal). © 2015 Elsevier B.V. All rights reserved.


Kumar G.,Vardhaman College | Kumar D.,Sahu Jain College | Devi S.,Vardhaman College | Johari R.,Vardhaman College | Singh C.P.,Sahu Jain College
European Journal of Medicinal Chemistry | Year: 2010

M(II) complexes of the type [HLCu2Cl3], [HLCu 2(O(CO)CH3)3], [HLM2Cl 4(H2O)3] and [HLM2(OC(O) CH 3)4(H2O)3], where M= Ni(II), Co(II) have been synthesized by condensation of 3-acyl-2-one indol and hydrazinecarbothioamide (2:1) in the presence of divalent metal salt in methanolic medium. The complexes have been characterized with the help of elemental analysis, conductance measurements, magnetic measurements and their structural configuration have been determined by various spectroscopic (electronic, IR, 1H NMR, 13C NMR, GCMS) techniques. Electronic and magnetic moments of the complexes indicate that the geometries of the metal centers are either distorted octahedral, or square planer. These metal complexes were also tested for their antibacterial and antifungal activities to assess their inhibiting potential. © 2010 Elsevier Masson SAS.


Singh B.R.,Sahu Jain College | Rani B.,Sahu Jain College | Deep S.S.,Sahu Jain College
Asian Journal of Chemistry | Year: 2010

The stability constants of hydrogen bonded ion pair or proton transfer complex formation of N,N'-dimethyl thiovioluric acid [DMTVA], N,N'- di-o-tolyl thiovioluric acid [DOTTVA], N,N'-di-m-tolyl thiovioluric acid [DMTTVA] and N,N'-di-p-tolyl thiovioluric acid [DPTTVA] with methyl amine, dimethyl amine, trimethyl amine, ethyl amine, diethyl amine, triethyl amine, n-butyl amine, dibutyl amine and tributyl amine have been determined spectroscopically in 95% (v/v) ethanol. The composition of the complexes is determined in solution potentiometrically and spectrophotometrically and substantiated by the element analysis and IR spectra of the isolated complexes. The stabilities of the thiovioluric acid-amine complexes have been correlated with the base strength of amines. The correlation between the mode of enolization in the acids and the structure of the proton transfer complex is discussed. The variation in proton transfer constants of acids has been explained on the basis of the changes in the distribution of electron density in the ring.


Kumar G.,Institute of Chemical Technology | Kumar D.,Sahu Jain College | Johari R.,Vardhman College
Ultrasonics Sonochemistry | Year: 2014

Limited resources of conventional fuels such as petrodiesel have led to the search for alternative fuels. Various convention batch/continuous processes for the biodiesel production have been developed before the recent year. All processes are time consuming with high labor cost. Thus, we need a new process for biodiesel production which reduces the reaction time and production cost as well as save the energy. In this work, ultrasonic assisted transesterification of Jatropha curcas oil is carried out in the presence of methanol and potassium hydroxide (KOH) as catalyst, keeping the molar ratio of oil to alcohol 1:5, catalyst concentration 0.75 wt% of oil, ultrasonic amplitude 50% and pulse 0.3 cycle, 7 min reaction time under atmospheric condition. Ultrasonic mixing has increased the rate of transesterification reaction as compare to the mechanical mixing. © 2014 Elsevier B.V. All rights reserved.


Kumar G.,Sahu Jain College | Kumar D.,Sahu Jain College | Singh S.,Sahu Jain College | Kothari S.,Sahu Jain College | And 2 more authors.
Energies | Year: 2010

Biodiesel, or alkyl ester, is an alternative renewable, biodegradable, and nontoxic diesel fuel produced by the catalytic transesterification of vegetable oil. Here we characterize a system for continuous transesterification of vegetable oil using five continuous stirring tank reactors (5CSTRs). We tested residence times of 16-43min, stirring speeds of 200-800rpm, a catalyst concentration (KOH) of 0.25-1 wt% of oil (in gram), different total flow rates of the oil and MeOH, and on the production performance of the 5 stage continuous reactor for transesterification of vegetable oil. Using a molar ratio of oil:methanol of 1:7 and a reaction temperature of 65 °C, we show that a high stirring speed increased the reaction rate, but an excessive stir speed decreased the reaction rate and conversion to biodiesel. Furthermore, a higher catalyst percentage significantly increased the reaction rate and production capacity. A catalyst percentage of 1 wt% of oil gave the best conversion; 99.04 ± 0.05%. The resulting biodiesel esters were characterized for their physical and fuel properties including density, viscosity, iodine volume, acid volume, cloud point, pure point, gross heat of combustion, and volatility. The purity and conversion of the biodiesel was analyzed by HPLC. © 2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.


Kumar G.,Institute of Chemical Technology | Kumar D.,Sahu Jain College
Journal of Environmental Chemical Engineering | Year: 2013

Ultrasonication used for the ethanolysis of non-edible vegetable oil using KOH as a catalyst makes the process fully economic at molar ratio oil to ethanol 1:4, catalyst concentration 0.75 wt% of oil, reaction time 7-8 min, ultrasonic amplitude 50% (100 W/m3) and cycle 0.7 s. ultrasonication reduces the reaction time comparing to the conventional batch process. RP-HPLC was used to monitor the reactivity during the base catalyzed ethanolysis of Jatropha curcas oil. A RP-HPLC method has been developed for the determination of triacylglycerol, diacylglycerol, monoacylglycerol as well as free fatty acids and their corresponding ethyl esters. The determination of these components was carried out using a 40 min combined linear gradient with aqueous-organic and non-aqueous mobile phase steps: 90% methanol + 10% water in 10 min, 100% methanol in 0 min, 60% methanol + 15% n-hexane + 25% propan-2-ol in 30 min and 90% methanol + 10% water for last 10 min was used for fast monitoring of transesterification reaction. Individual calibration curves (relative peak area versus amount of the compound) were found for quantitative analysis of ethyl esters and acylglycerol shows good linearity at UV detection 215 nm. The identification of each compound can be done by APCI-MS in the position ion mode. © 2013 Elsevier Ltd. All rights reserved.


PubMed | Sahu Jain College
Type: Journal Article | Journal: Ultrasonics sonochemistry | Year: 2010

The production of biodiesel from non-edible vegetable oil using ultrasonication, calls for an efficient solid catalyst to make the process fully ecologically and economically friendly. The methodology allows for the reaction to be run under atmospheric conditions. Solid catalyst and ultrasonication reduced the reaction time comparing to the conventional batch processes and we found 98.53% biodiesel yield. The optimal conditions for biodiesel production is the molar ratio oil to methanol 1:9, Catalyst conc. 3 wt.% of oil and 15 min reaction time.


PubMed | Sahu Jain College
Type: Journal Article | Journal: Ultrasonics sonochemistry | Year: 2010

Biodiesel is a renewable fuel, consistituting an alternative to petroleum-based diesel fuel. It is non-toxic and biodegradable and has a low emission profile, is better from environmentally sensitive areas. Research study on alternative fuels is essential for increased energy security. Presently, biodiesel is produced mainly is batch reactor. In this process the required energy is given by heating accompanied by mechanical stirring which has several disadvantages because of time consuming high labour cost. Being methanol is a toxic chemical; the objective of this work is to produce coconut oil ethyl ester by using ultrasonic irradiation. The advantages of ethanol are non-toxic domestic all available, having higher carbon atoms which provide higher heat content. The optical conditions for biodiesel production is the molar ratio oil to ethanol 1:6, KOH catalyst 0.75wt.% of oil and 7min reaction time. The reaction time reduced 15-40 times comparing to the conventional batch processes and found >or=98% biodiesel yield.

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