The obtained results were compared to the normal

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Unformatted text preview: xes are widely used in biomedical field, sensing areas, lighting devices and optical imaging because they exhibit intense luminescence due to their narrow emission bands. In order to create high luminescence complexes, ligands which chelate to the lanthanide atoms should be able to protect lanthanide ions from solvent molecules and absorb energy to transfer them efficiently to the central metal atom. Rare-earth metals with benzoic acid and some of the derivatives or with mixed ligands have drawn great attention due to the various crystal structures and unique properties. Benzoic acid and 1,10-phenanthroline with their rare earth complexes (Ln = Nd, Eu, Tb) were synthesized through reflux and hydrothermal processes. The complexes were characterized by means of elemental analysis, FTIR, single-crystal X-ray diffraction and photoluminescence spectroscopy. FTIR shows all the bands shifts indicating that carbonyl, ether oxygen atom and phenanthroline nitrogen atoms take part in coordination. X-ray diffraction shows all the complex crystals adopt triclinic crystal system with P -1 space group. The crystals have very compact structures and they have a nine coordination environment. The crystal data obtained from these complexes are slight ly different from the others due to the lanthanide contraction. Among these complexes, Eu(lll) complex and Tb(lll) complex exhibit high photoluminescence emission. 139 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia INO-P15 SYNTHESIS, CHARACTERIZATION, CRYSTAL STRUCTURE AND OXIDATIVE DNA CLEAVAGE STUD Y OF MIXED LIGAND COPPER(II) COMPLEX WITH HETEROCYCLIC BASE Yi Han Tan, and *Siang Guan Teoh School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: sgteoh@usm.my A ternary copper(II) complex, [Cu(phen)(DL-Thr)(H2O)]Cl·2(H2O) (phen = 1, 10-phenanthroline, DL-Thr = DL-Threonine), has been synthesized and characterized by physicochemical methods. The complex is structurally characterized by X-ray crystallographic methods. The asymmetric unit of the compound crystallized in a triclinic system with space group P1, a = 7.1972(1) Å, b = 11.9785(2) Å, c = 12.2915(2...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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