3,3'-(1,4-Phenylenebis(phenylazanediyl))bis(7-ethoxy-4-methyl-2H-chromen-2-one) was synthesized from N,N'-diphenylbenzene-1,4-diamine and bromo-7-ethoxy-4-methylcoumarin based on Ullmann coupling reaction. The synthesized compound was characterized by UV-Visible, NMR, FT-IR, MS, elemental analysis and Fluorescence Spectrum.Keywords: coumarin; phenylenediamine; Ullmann coupling reaction; hole transporting material The title compound 3,3'-(1,4-phenylenebis(phenylazanediyl))bis(7-ethoxy-4-methyl-2H-chromen-2-one) is used as an efficient hole and electron transporting materials in optoelectronic devices. Coumarin and its derivatives occur widely in nature, and have been extensively exploited in biological, chemical and physical fields [1]. Coumarins have outstanding optical properties, including an extended spectral range, high quantum yields, superior photostability and good solubility in common solvents. Many natural and synthetic coumarin derivatives are widely used as electroluminescent (EL) materials [2]. Coumarin derivatives have attracted much interest owing to their potential applications in organic light-emitting diodes (OLEDs) [3]. The arylamine moiety fulfills the requirement of easy and reversible oxidation and therefore constitutes the building block of many of the hole-transporting materials [4].N,N'-diphenylbenzene-1,4-diamine was synthesized from p-phenylenediamine and bromobenzene by known procedure [5]. A yellow solid with melting point 135 °C was obtained. 3-bromo-7-ethoxy-4-methyl coumarin was synthesized from 3-bromo-7-hydroxy-4-methylcoumarin and ethyl bromide [6]. A brown solid was obtained which has a melting point of 72 °C. N,N'-diphenylbenzene-1,4-diamine OPEN ACCESS