Abstract
Two dicationicCu(II) complexes of [Cu(phen)(NNN)]Br-2 (1-2) general formula [phen = 1,10-phenanthroline, NNN = diethelenetriamine (dien) (1) and dipropylenetriamine (dipn)(2)], have been synthesized in very good yields. The two complexes were characterizedvia UV-vis., CHN-EA, MS, FT-IR, thermal, and X-ray crystallographic techniques. XRD data for 1 showed a distorted square pyramidal Cu(II) ions geometry center with three uncoordinated water molecules. TGA were performed to evaluate the interactions strength and found to support the XRD molecular interactions results. The time-dependent density functional theory (TD-DFT) and electron transfer processes were modeled, and consequently the absorption maxima around 610 and 280 nm were attributed to d-d and Phen(pi)-> Phen(pi*) transitions. Positive Gutmann'ssolvatochromismbehavior of both complexes have been recorded. Furthermore, the ability of the two complexes for DNA binding was evaluatedvia absorption studies in the visible region showing high K-b constant values. (C) 2021 Elsevier B.V. All rights reserved.