Synthesis, Structure And Spectroscopic Properties Of Copper(â… ) Complexes With Pyridine-Containing Schiff Base,Phosphine Ligands/Nitrogen-Containing Ligands

In this thesis, six copper(I) complexes halide and four copper(I) pseudo halide complexes, {[Cu₂(L1)(PPh₃)₂I₂]·2CH₂Cl₂}_n (1), {[Cu₂(L2)(PPh₃)₂]BF₄}_n (2), [Cu₂(L3)(PPh₃)₄I₂]·2CH₂Cl₂ (3), [Cu₂(L4)(PPh₃)₄I₂] (4), [Cu₂(L5)(PPh₃)₂I₂] (5) and [Cu₂(L6)(PPh₃)₂I₂] (6), [Cu₂(C₃N₆H₆XSCN)₂]_n (7), {[Cu₂(L3)(SCN)₂]·0.5CH₃CN}_n (8), [Cu₂(L5)(SCN)₂]_n (9) and {[Cu₄(SCN)₆][Cu(C₂N₂H₈)₂]·H₂O}_n (10) were synthesized.In chapter 2, Six copper(I) complexes {[Cu₂(L1)(PPh₃)₂I₂]·2CH₂Cl₂}_n (1), {[Cu₂(L2)(PPh₃)₂]BF₄}_n (2), [Cu₂(L3)(PPh₃)₄I₂]·2CH₂Cl₂ (3), [Cu₂(L4)(PPh₃)₄I₂] (4), [Cu₂(L5)(PPh₃)₂I₂] (5) and [Cu₂(L6)(PPh₃)₂I₂] (6) have been prepared by reaction of bis(schiff base) ligands pyridine-4-carbaldehyde azine (LI), 1,2-bis(4 -pyridylmethyleneamino)ethane (L2), pyridine-3-carbaldehyde azine (L3), 1,2-bis(3 -pyridylmethyleneamino)ethane (L4), pyridine-2-carbaldehyde azine (L5), 1,2-bis(2 -pyridylmethyleneamino)ethane (L6) with PPh₃ and copper(I) salt, respectively. Their crystal structures were determined by single-crystal X-ray diffraction. In complexes 1 and 2, Ligand L1 and L2 links (PPh₃)₂Cu₂(μ-I)₂ and (PPh₃)₂Cu units to form an infinite coordination polymer chain, respectively. In complexes 3 and 4, Ligand 3 and 4 acts as a monodentate ligand to coordinate two copper(I) atoms yielding a dimmer, respectively. In complexes 5 and 6, Ligand 5 or 6 chelates two copper(I) atoms using pyridyl nitrogen and imine nitrogen to form a dimmer, respectively. The complexes have been characterized by elementary analysis (EA), infrared (IR), ultra-violet and visible (UV-vis) and luminescence spectroscopic analyses. Complexes 1-4 exhibit photoluminescence in the solid state at room temperature. The emission has been attributed to be intraligand Ï€-Ï€* transition mixed with MLCT or LMCT characters. Complexes 5 and 6 did not emit at room temperature.In chapter 3, Four copper(I) complexes [Cu₂(C₃N₆H₆)(SCN)₂]_n (7), {[Cu₂(L3)(SCN)₂]·0.5CH₃CN}_n (8), [Cu₂(L5)(SCN)₂]_n (9), {[Cu₄(SCN)₆][Cu(C₂N₂H₈)₂]·H₂O}_n (10) have been prepared by reaction of CuSCN with Melamine, pyridine-3-carbaldehyde azine (L3), pyridine-2-carbaldehyde azine (L5), 1,2-bis(2 -pyridylmethyleneamino)ethane (L6), respectively. Their crystal structures were determined by single-crystal X-ray diffraction. In...