Programme Book - UPM - Universiti Putra Malaysia

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P50PRELIMINARY STUDIES OF DEEP EUTECTIC SOLVENTSM. Syafiq , N. F. Mohamed Daud, K. Sirat*Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPMSerdang, Selangor, MalaysiaCorresponding author: kamaliah@science.upm.edu.myIonic liquids have been developed to replace organic solvents due to the less toxiceffects on the environment. However, ionic liquids have the limitation of toxicityagainst human and environment and the production cost is expensive. New type ofionic liquid, that is, deep eutectic solvents (DESs) have been successfully discovered.These DESs have been synthesized by various reactions including the reaction ofinorganic salts/metal salts with different hydrogen bond donor at certain ratios, andthe reactions of Lewis acids and bases. These studies have concentrated on thepreparation of FeCl 3 based DESs and the DES synthesized from the reactions ofhydrogen bond donor molecules (urea, acetamide and trimethylammonium chloride)with organic acids (succinic, tartaric and oxalic acids). They are capable of selfassociation, often through hydrogen bond interaction, to form a eutectic mixture witha melting point lower than that of each individual component. Most of the eutecticcompounds have the melting point less than 100 ⁰C. The advantages of DES are thatthey are easily prepared with high purity at low cost, environmentally biodegradableand have low toxicity. FT-IR analysis shows the hydrogen donor molecules havereacted to form the eutectic compounds. The data on the physical properties such asviscosity and conductivity show that DES formed are similar to ambient temperatureof ionic liquids. It was found that the types of salt and hydrogen bond donor and themole ratio of both compounds have paramount effect on the studied properties. DESsare now having many interests of the researchers among many fields. DESs can becontributes in catalysis, dissolution and extraction process, organic synthesis, materialchemistry and electrochemistry.65 |16 th Industrial Chemistry Seminar: Chemistry- A Passport to a Brighter Future
P51 SYNTHESIS AND CHARACTERIZATION OF MIXED-LIGANDTRANSITION METAL COMPLEXES CONTAINING IMIDAZOLEDERIVATIVES AND SACCHARINF.E. Abd Aziz, N. Mohd Mokhtaruddin, Thahira BSA Ravoof*Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPMSerdang, Selangor, MalaysiaCorresponding author: thahira.begum@science.upm.edu.myThe starting ligand, dithiocarbazate (NH 2 NHCS 2 - ) was prepared by the reactionbetween hydrazine hydrate (NH 2 NH 2 H 2 O) and carbon disulfide (CS 2 ) with theaddition of benzyl chloride derivatives. Condensation reaction between the startingligand and aldehyde derivatives which are pyridine-2-aldehyde, 6-methylpyridine-2-aldehyde and 2,4-dihydroxybenzaldehyde produced Schiff bases. Metal complexeswill be produced by the reaction of Schiff bases ligand with Ni (II) and Cu (II) metalions. New mixed-ligand metal complexes of general empirical formula[Ni(ONS/NNS)(bzd)], [Ni(ONS/NNS)(im)] and [Cu(NNS)(sac)] have beensynthesized and characterized by conductance, magnetic, IR and electronicspectroscopic techniques. Magnetic and spectral evidence indicate that all theparamagnetic complexes are four coordinates and have the distorted square planarstructure. The Schiff bases are coordinated to the metal ions as tridentate NNSchelates via the pyridine nitrogen atom, the azomethine nitrogen atom and the thiolatesulphur atom while ONS chelates via the phenolic oxygen, the azomethine nitrogenatom and the thiolate sulphur atom. The saccharinate anion, imidazole anion andbenzimidazole anion coordinated as a unidentate and donor ligand. All the metalcomplexes are non-electrolytes in dimethyl sulfoxide (DMSO).66 |16 th Industrial Chemistry Seminar: Chemistry- A Passport to a Brighter Future
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16 th INDUSTRIAL CHEMISTRY SEMINAR
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Message from the Dean,Faculty of Sc
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Page 22 and 23: P06 PRELIMINARY STUDY ON NEW AMINO
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Page 42 and 43: P26 THE SYNTHESIS AND EFFECTS OF Ph
Page 44 and 45: P28CHEMICAL CONSTITUENTS OF Artocar
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Page 64 and 65: P48 OXIDATION OF BENZYL ALCOHOL TOB
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