Full Paper New nano-sized supramolecular metal coordination polymers derived from 1,2-bis (2-pyridyl)-ethene and benzimidazole Aref A.M.Aly*, Maged S.Al-Fakeh, Mahmoud A.Ghandour, B.M.Abu-Zied Chemistry Department, Faculty of Science, Assiut University, 71516 Assiut, (EGYPT) E-mail : maged7969@yahoo.com Coordination polymers; X-ray powder diffraction; Thermal studies SEM and TEM. KEYWORDS ABSTRACT A number of new nano-sized supramolecular coordination polymers of Mn (II), Co (II), Ni (II), Cu (II) and Cd (II) derived from 1,2-bis (2-pyridyl) ethene (BPE) and benzimidazole (BIMZ) has been prepared and characterized. The compounds have been characterized based on elemental analysis, FT-IR and electronic spectral studies and thermal analysis. Thermogravimetry (TG), derivative thermogravimetry (DTG) and differential thermal analysis (DTA) have been used to study the thermal decomposition steps and to calculate the thermodynamic parameters of the metal coordination polymers. The kinetic parameters have been calculated from the Coats-Redfern and Horowitz-Metzger equations. From SEM and TEM photographs as well as from the powder XRD data the particle size of the complexes was determined which indicates the nano- sized nature of the prepared compounds (average size 24-28 nm).  2013 Trade Science Inc. - INDIA INTRODUCTION Supramolecular Coordination polymers have re- ceived much attention due to their potential applica- tions as functional materials ranging from gas storag [1,2] , ion-exchange [3-5] , magnetism [6] , catalysis [7] and mo- lecular sensing [8,9] . The continuing interest in this area is also due to their intriguing variety of architectures and topologies through the variation of building blocks and reaction conditions [10-14] . Bidentate bridging ligands such as 1,2-bis (4-pyridyl)ethane and 1,2-bis (2- pyridyl)ethene are widely used to construct stable su- pramolecular complexes of well designed self-assem- bly [15] . These complexes are of potential application in catalysis [16] . In the last decade coordination com- pounds with infinite one-, two-, and three-dimensional network structures have been intensively studied [17- 19] . In last decades, heterocyclic benzimidazoles, their derivatives and transition metal complexes have re- ceived considerable attention in coordination chemis- try, because of their well-documented biological ac- tivities. It was found that such complexes showed larger antimicrobial activities than the free ligands [20,21] . The aim of this article is therefore to synthesize and An Indian Journal Trade Science Inc. Volume 7 Issue 5 Nano Science and Nano Technology Nano Science and Nano Technology NSNTAIJ, 7(5), 2013 [197-203] ISSN : 0974 - 7494 N N N H N 1,2-bis(2-pyridyl)ethene benzimidazole Figure 1 : Structures of the ligands.