A series of 2-(2-arylamino-4-phenylthiazol-5-yl)benzofurans derivatives were synthesized from 1-aryl-3-(N-phenylbenzimidoyl)thiourea and 2-(2-bromoacetyl)benzofuran in the presence of triethylamine. Their structure was established on the basis of IR, 1H NMR and mass spectral analyses. The entire newly synthesized compound was screened for their antioxidant and antibacterial potential. All the compounds showed low to moderate activity against the microorganisms tested.
Aims: The present study involved the synthesis of small carboxylic acid based ionic liquids as potential herbicides.
Study Design: Synthesized ionic liquids.
Place and Duration of Study: Organic Synthesis Laboratory, Department of Chemistry, CBSH, G. B. Pant University of Agriculture and Technology, Pantnagar, U.S. Nagar-263145, Uttarakhand, India between September 2016 and May 2017.
Methodology: In the present studies, we synthesized ionic liquids comprising tetrabutylammonium as cation and prolinate, tartrate, alanate, serinate, crotonate, citrate, malonate, nicotinate, glycinate and oxalate as organic anions. The synthesized ionic liquids were screened for seed germination inhibition activity at 0.005M, 0.01M and 0.02M concentration in distilled water against radish (Raphanus sativus) seeds.
Results: Seed germination inhibition activity increased with increase in concentration. The compounds having an anion of tartrate, crotonate, citrate, malonate and oxalate were found at par with standard butachlor at 0.02M concentration.
Conclusion: From the above studies it clearly indicate that ionic liquids containing these organic acid anions as a part of ionic liquid may be developed as potential herbicides.
In conventional cyclic voltammetry (CV) measurements, the potential of the working electrode (WE) is changed at a fixed scan rate w.r.t a reference electrode and the current response to the potential stimuli recorded. The current-potential data are in turn related to the redox behavior of the electro-active species in the electrolyte on the WE. The contribution of the counter electrode (CE) to the electrical signals has been suppressed by design to avoid its influence on the I-V characteristics of the WE. However, simultaneous measurement of the counter electrode potentials during CV measurements can provide useful qualitative information on the electrochemical process/es occurring at the CE and thus help in the comprehensive assessment of the overall electrochemical process/es under question. This has been demonstrated with tungsten and graphite WEs respectively against graphite and molybdenum CEs in CaCl2-x wt.% CaO melts (x = 0 and 1) at 1173 K. The technique has been applied to CV cell with Nb2O5 pellet as the WE against graphite CE in CaCl2 melt and the results prove that preliminary information on the electro-deoxidation of the oxide electrode could be achieved by the novel measurements.
¶This work aims is to find means to improve the solubility of the not very water soluble organic pollutants.¶ ¶For that, we made a study of solubilization of a not very water soluble organophosphorus insecticide, and in weak concentrations in the ionic micellar systems, in the presence of active surface CTAC and SDS. With an aim of better understanding this mechanism of solubilization of insecticide profenofos (PFF). Concentration effect of PFF and temperature on the CMC have been studied by conductometric way and the determination of the thermodynamic parameters of micelization. ¶It was noted in this work that the CMC and the values of the degree of electrolytic dissociation of surfactant used decrease with the effect PFF concentration in solution and according to the temperature of the medium. ¶The results of this study showed on the one hand that the Gibbs free enthalpy (∆G°) of the reactions of association between the PFF and the active surface ones is negative and believes in absolute value. ¶In addition the calculation of the degrees of dissociation showed that the PFF is solubilized in these active surface ionic.
This work reports on the catalytic efficiency of the micelle templated silica based supported palladium catalysts. The supports were prepared by one-pot co-condensation of organoaminesilanes and tetraethoxysilane with 1:4 and 1:9 loading ratios in presence of castor oil template. The supports and supported catalysts were characterized by acid titration, Atomic Absorption Spectroscope, Diffuse Reflectance Infrared Fourier Transform Spectroscopy and porosimeter. The loading of amino groups for the prepared materials ranged from 2.08 to 4.105 mmol g-1 while the loading of palladium ranged from 1.05 to 1.73% w/w. The presence of absorption bands at around 3600-3100 cm-1 reveals that the organoaminesilyl groups are successfully incorporated in each silica matrix prepared. The pore size distribution of these materials ranges from 2 to 20 nm with an average pore diameter of about 8 nm. The surface area of 3-aminopropyl functionalized micelle templated silica prepared by castor oil template is 428 m2 g-1 and a pore volume of 1.1024 cm3 g-1. The catalytic efficiencies range from 34.09 to 58.33% depending on the type of template used, organosilane to tetraethoxysilane ratio and, temperature at which the reaction was carried. The present investigation concludes that the catalysts are active on the oxidation of a mixture of phenols at 27°C and 70°C using hydrogen peroxide oxidant.