ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis in water-free DMF, characterization, electrical, and gas sensing properties of bis[2-(2-aminoethylamino)ethanol]copper(II) dibromide

Sülin Taşcıoğlu, Bahattin Yalçın, Fatih Dumludağ, and Esra Kakı

Faculty of Arts and Sciences, Department of Chemistry, Marmara University, 347 22, İstanbul, Turkey

E-mail: stascioglu@marmara.edu.tr

Abstract: 2-(2-Aminoethylamino)ethanol (L) reacts with cupric bromide in dimethylformamide to give a mononuclear complex of Cu(II) [L₂Cu]Br₂, with six-coordinate distorted octahedral geometry, in which two molecules of tridentate (N,N,O) ligand are involved. The structure was confirmed by spectroscopic methods, elemental and thermogravimetric analyses, and magnetic measurements. Optimization of possible configurations indicated the formation of the trans structure of the complex. Experimental results indicate that the investigated complex, bis[2-(2-aminoethylamino)ethanol] copper(II) bromide, behaves as a semiconductor in the studied temperature range of 298–388 K. Gas sensing properties of the film for the volatile organic compounds (VOCs): acetone, tetra-chloromethane, chloroform, ethanol, and methanol, were also investigated as a function of vapor concentration and temperature in dark. The film showed maximum sensitivity to tetrachloromethane and ethanol vapors at room temperature. Responses of the film to the tested gases are reversible.

Keywords: 2-(2-aminoethylamino)ethanol – copper(II) bromide – six coordinated Cu(II) complex – semiconductor – gas sensing

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-013-0362-4

Chemical Papers 67 (6) 613–623 (2013)