Journal of Advanced Chemical Engineering

Abstract

Crystal structure, GTA/DTA and fluorescence properties of (?2-chloro)-? oxalato-K4O1, O2: O1 ?, O2? - (?1-1-dioxane)- (2,2 ?, 6?, 2 ?-terpyridine)-tetra copper (II)

Ouahida ZEGHOUAN

Our research is focused on a tridentate heterocyclic molecule, derived from pyridine:  2, 2 ‘: 6’, 2 ‘’ - terpyridine, in which we were able to isolate a new orgaometallic-fluorophore by incorporating Cu(II) transition metal. The structural study of (μ2-chloro) - μ oxalato-Κ4O1, O2: O1 ‘, O2’ - (μ11-4 dioxane) - (2,2 ‘, 6’, 2 “-terpyridine) -tetra copper (II) has shown that the tetramer crystallizes in the P 21 / n space group of the monoclinic system and that the four CuII metal ions are pentacoordinated, with a square-based pyramidal geometry. The crystalline structure is built on π-π interactions and weak hydrogen bonds of the CH ... Cl and CH ... O types, thus generating queues that extend along the two crystallographic axes and to build a three-dimensional structure. The deviation from the mean plane of terpyridine molecules in the complex tpy1 (N1-C5-C6-N2C10-C11-N3) and tpy2 (N4-C20-C21- N5-C25-C26-N6) is 0.0166 and 0.0171Å respectively, the dihedral angle between these two planes is 5.99 (7) °. The promising results obtained with the ligand 2,2 ‘: 6’, 2 “-terpyridine, should allow to open the way for a rich chemistry towards the synthesis of heteroleptic complexes in which all ligands coordinated to the metal are not identical to form a supramolecular network.

Published Date: 2020-09-15;