Research Papers/Topics in Pure and Industrial Chemistry

Spectrophotometric Determination of Chromium (Iii) and Chromium(Vi) Using 2-[E)-[3-[(2-Hydroxybenzylidene) Amino]PhenylImino)Methyl]Phenol

ABSTRACT The Schiff base ligand, 2-[(E)-[{3--[(2-hydroxybenzylidene)amino]phenyl}imino)methyl]phenol was synthesized by condensing 1,3-diaminobenzene and 2-hydroxybenzaldehyde in absolute ethanol. Its Cr(III) and Cr(VI) complexes were equally synthesized. The ligand was characterized via UV, IR and NMR spectroscopy, whereas the complexes were characterized based on UV and IR spectroscopy and conductivity values. Stoichiometric studies indicated 1:1 metal to ligand ratio for both complexes. C...

Spectrophotometric Determination of Paracetamol using Zirconium (Iv) Oxide and Ammonium Trioxovanadate (V)

ABSTRACT A simple and sensitive spectrophotometric method for the determination of paracetamol was explored, using zirconium(IV) and vanadium(V) oxides. The method was based on the oxidation of paracetamol by zirconium(IV) and vanadium(V) in alkaline and acidic media respectively. The stoichiometric studies indicated a mole-ratio of 1:1 for the reactions of paracetamol with both zirconium(IV) and vanadium(V). Effects of other variables like pH, temperature and time were determined and showed...

Synthesis, Characterization and Use of Zeolite in Removal of Pb(Ii) Ions from Waste Water

ABSTRACT The removal of Pb(II) ions from aqueous model solution using zeolite has been investigated under different operational parameters like heavy metal ion concentration, adsorbent amount and particle size. The zeolite used was synthesized and characterized using SEM and XRD analysis. The equilibrium adsorption capacity of zeolite used for lead removal were measured and the experimental data analyzed by means of Freundlich and Langmuir isotherm models. The adsorption efficiency of Zeolit...

Synthesis of N-(Heteroaryl Substituted) Benzene Sulphonamides and their Biological Activities

ABSTRACT The synthesis of N-heteroaryl substituted benzene sulphonamides and evaluation of their biological activities are reported. Synthesis was achieved by the reaction of benzene sulphonyl chloride and substituted amino heterocycle in dry pyridine. The structures of synthesized compounds were assigned by spectroscopic methods. The eight (8) synthesized compounds were evaluated for antibacterial and antifungal activities. The results showed that some of the new compounds exhibited activit...

KINETICS AND MECHANISMS OF THE REDOX REACTIONS OF µ-ADIPATO-DI (N,N/ BIS(SALICYLIDENE) ETHYLENEDIAMINATOIRON (III) [(Fe-Salen)2adi] WITH SOME THIOLS

ABSTRACT The kinetics and mechanisms of the redox reactions of oxidant, m -adipato-di(N,N/ - bis(salicylidene)ethylenediaminatoiron(III),[(Fe-salen)2adi],hereafter denoted as Fe2adi, with the thiols L-cysteine (LSH), thiourea (USH), thioglycolicacid(GSH),2– mercaptobenzothiazole (BTSH) and benzylmercaptan (BSH) have been studied spectrophotometrically at 495 nm in aqueous perchloric acid, I=0.01mol dm-3 (NaClO4) and at 29 ± 1o C. The stoichiometry of 1:1 was obtained for Fe2adi – LSH, F...

PalladiumCatalyzed Sonogashira Synthesis of Mono- and Bisalkynylated Derivatives of Quinoline-5,8-Dione and their Antimicrobial Activity

ABSTRACT The synthesis of five mono- and five bis-alkynylated derivatives of quinoline-5,8-diones is reported. The intermediate 6,7-dibromoquinoline-5,8-dione was obtained by nitrosation of 8- hydroxyquinoline, followed by reduction and subsequent bromination and oxidation. The coupling reaction of 6,7-dibromoquinoline-5,8-dione via palladium-catalyzed Sonogashira cross-coupling gave the alkynylated products. The chemical structures of the products were confirmed using spectroscopic methods ...

Production, Optimization and Application of Printing Ink from Waste Carbon Sources

ABSTRACT  Production of carbon black from novel sources like spent automobile tyre, anthracite coal, furnace soot and graphite rod and subsequent use in the production of offset printing inks has been investigated. Carbon black from these sources were obtained by pyrolysis of shredded spent tyre and coal samples at 750-900o C in an electrical furnace, isolation of furnace carbon black and graphite rod from dry cell, drying and pulverization of the resulting samples. Acid demineralization of ...

Evaluation of the Fuel Properties and Thermal Efficiency of Sub-Bituminous Coal-Biomass Blends

ABSTRACT The improvement of the combustion properties of coal and biomass by blending and carbonization was investigated. Proximate and ultimate analysis of coal, sawdust, corn cob and their blends were carried out using ASTM methods. The proximate and ultimate analyses were repeated on the five blends after carbonization at 500o C for one hour. Ten mixtures of coal-sawdust and coal-corn cob blends were made into briquettes using starch binder. The calorific values of the samples were determi...