International Journal of ChemTech Research CODEN (USA): IJCRGG ISSN: 0974-4290 Vol.7, No.3, pp 1578-1585, 2014-2015 ICONN 2015 [4 th - 6 th Feb 2015] International Conference on Nanoscience and Nanotechnology-2015 SRM University, Chennai, India Ullmann Condensation Via O-Arylation of Phenol using Nano Copper Derived From Copper(II) Precursor Arunachalam Dinesh Karthik 1 and Kannappan Geetha 2 * 1 Department of Chemistry, K. M. G. College of Arts and Science, Gudiyattam, 635 803 Vellore.Dt. Tamil Nadu, India 2* Department of Chemistry, Muthurangam Govt. Arts College(Autonomous), Vellore - 632 002, Tamil Nadu, India Abstract: Copper nanoparticles provide an efficient, economic, and novel method for the synthesis of diaryl ethers via Ullmann condentation. This method provides a wide range of substrate applicability and avoids the use of a heavy metal co-catalyst and gives diaryl ethers in satisfactory yields. The action of nanoparticles copper catalysts using thermal decomposition method with a mean particle size of 75 nm in the Ullmann ether synthesis is reported. Keywords: Metallic nanoparticles, Copper, thermal reduction Inorganic precursor, X-ray diffraction and Ullmann. Introduction Copper and the compounds of Au, Ag, Pd and Pt are widely used these days. Copper has an excellent electrical conductivity. Due to relatively low costs, this metal plays a significant role in modern electronic circuit 1 . Because of its excellent electrical conductivity, catalytic behaviour, good compatibility and surface enhanced Raman scattering activity, Copper nanoparticles have drawn the attention of scientists to be used as essential component in the future nano devices 2 . Copper nanowires are used in nanoelectronics and have application possibilities for magnetic devices, nano sensors, electron emitters and other electronic applications 3 . Copper nanoparticles have been explored to be used as nanoprobes in medicines and bio-analytical areas 4 High temperature superconductivity materials are mostly prepared from CuO based compounds 5 . Similarly semiconducting anti ferromagnetic materials are also synthesized from Copper nanoparticles are a class of materials with properties which differ from their characteristics and find use in different areas such as electronic, magnetic, pharmaceutical, cosmetic energy, catalytic and materials applications. A large number of nanoparticles have been prepared most frequently by dispersion of performed polymers 5 . Solvent evaporation method and ionic gelation method. In order to produce small particle size, often a high speed homogenization or ultrasonication may be employed. Conventional methods such as solvent extraction evaporation, includes NaBH 4 6 , Cu, Ni, Co complexes 7 and macrocyclic ligands 8 . This method avoids the use of hazardous polymers and solvents which are required in excess amounts. The most popular Cu(I) 9 and Cu(0) 10 nanoparticles emerged as useful and unique green catalysts whose efficiency is attributed to their characteristic high surface to volume ratio that translates into more number of active sites per unit area compared to dominate the properties of matter