Volume 33, Issue 9 e5023
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The formation of a metallosupramolecular porous helicate through salicylaldehydethiosemicarbazone: Synthesis, Characterization, Cytotoxic activity, DNA binding and DFT calculations

Elif Avcu Altiparmak

Elif Avcu Altiparmak

Department of Chemistry, Engineering Faculty, Istanbul University-Cerrahpaşa, 34320 Istanbul, Turkey

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Guneş Ozen Eroglu

Guneş Ozen Eroglu

Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, 34093 Istanbul, Turkey

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Elif Ozcelik

Elif Ozcelik

Chemistry Department, Yildiz Technical University, Davutpasa Campus, 34220 Esenler, Istanbul, Turkey

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Namık Özdemir

Namık Özdemir

Department of Mathematics and Science Education, Faculty of Education, Ondokuz Mayıs University, 55139 Samsun, Turkey

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Serap Erdem Kuruca

Serap Erdem Kuruca

Department of Physiology, Faculty of Medicine, Istanbul University, 34093 Istanbul, Turkey

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Nergis Arsu

Nergis Arsu

Chemistry Department, Yildiz Technical University, Davutpasa Campus, 34220 Esenler, Istanbul, Turkey

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Bahri Ülküseven

Bahri Ülküseven

Department of Chemistry, Engineering Faculty, Istanbul University-Cerrahpaşa, 34320 Istanbul, Turkey

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Tulay Bal-Demirci

Corresponding Author

Tulay Bal-Demirci

Department of Chemistry, Engineering Faculty, Istanbul University-Cerrahpaşa, 34320 Istanbul, Turkey

Correspondence

Tulay Bal-Demirci, Department of Chemistry, Engineering Faculty, İstanbul University-Cerrahpaşa, 34320 İstanbul, Turkey.

Email: [email protected]

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First published: 07 July 2019
Citations: 3

Abstract

The reaction of salicylaldehyde-S-methylisothiosemicarbazone in the presence of ethylenediamine base and iron (III)chloride generated unforeseen homotopic dinuclear triple-stranded iron (III)helicate. The synthesized helicate was characterized by elemental analysis, IR, UV–Vis spectroscopy, magnetic moment measurement, and evaluated cytotoxic activities against K562, HL-60 and THP-1 leukemia cells. In addition, solid-state structure has been determined by single-crystal X-ray diffraction technique. In the complex, three dinucleating O, N, N, O donor ligands provide three diazine (NN) bridges between the metal ions and facial O3N3 coordination spheres around them. The ligands are folded about the NN single bond and coordinated to the two metal ions in a helical fashion to form the triple helical structure. In the crystal lattice, chains of centrosymmetric urn:x-wiley:02682605:media:aoc5023:aoc5023-math-0001 rings, which are connected to one another via π─π stacking interactions, are generated by C─H···O intermolecular interactions. The results are also confirmed by the density functional theory (DFT) calculations. The results obtained from the cytotoxicity test showed to be effective in low concentrations on the leukemia cells. An intercalative binding mode of helicate-DNA complex was confirmed with the high intrinsic binding constant (Kb = 8×106 M−1) and competitive displacement assay of Ethidium bromide with high Ksv value.

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