Syntheses and characterization, investigation DNA interactions, electrical and optical properties of oligomer by polycondensation and their metal complexes and the new schiff bases

In this study, according to the literature by reaction of ethylenediamine with a flavonoid naringenin (4E)-4-[(2-{[(4E)-5,7-dihydroxy-3-(4-hydroxyphenyl)-3,4-dihydro-2H-1-benzopyran-4-ylidene]aminoethyl)imino]-2- (4-hydroxyphenyl) -3,4-dihydro-2H-1-benzopyran-5,7-diol (L1) ligand and naringenin with 4-amino benzoic hydrazide firstly unilateral Schiffbase, later the reaction of this compound with salicylaldehyde N?-[(4E)-5,7-dihidroksi-2-(4-hidroksifenil)-3,4-dihidro-2H-1-benzopiran-4-ylidene]-4-[(Z)-[(2-hidroksifenil)metileden]amino]benzohidrazid (L2) ligand was synthesized. The obtained compounds were prepared Cu(II), Ni(II), Zn(II), Co(II), Cd(II) and La(III) metal complexes. In addition, these synthesizedSchiff bases and their metal complexes were polymerized by oxidative polycondensation reaction with NaOCl as an oxidant in an aqueous alkaline medium at 90o C. The monomers andthe polymers were characterised by elemental analyses, molar conductivity, magnetic susseptibility, UV-visible, FT-IR, 1H NMR , ESI-TOF mass, TGA/DTA and GPC. Then, theinteractions with the DNA, as well as optical and electrical properties were investigated.Then, the interactions with the DNA, as well as optical and electrical properties wereexamined. Study of direct interaction with DNA; serious damage to DNA only the complex of L1Cu, in the presence of H2O2 increases the damage of the DNA complex of L1Cu, L3 and L1Cocompounds also significantly reduce the damage to DNA were determined.Optical and electrical studies polymers used only, it was seen that all compounds had indirect band gaps and they could be accepted as in semiconductor class.The production ofpolymers using the device, characteristic parameters of fabricated devices such as ideality factor, barrier height, series resistance and carrier density were determined using current-voltage (I-V) and capacitance-voltage (C-V) measurements. In addition, sensitivity to light, open circuitvoltage and short circuit current of the structures with respect to the light intensity were investigated by taking the I-V measurements under a solar simulator with AM1.5 global filter. Asolar cell was fabricated using the polymeric metal complex (L3Zn)which had a highest sensitivity to light and its photovoltaic properties were determined.