TEMPLATE-ENGINEERED TRIVALENT IRON AND CHROMIUM CONTAINING MACROCYCLIC COMPLEXES: CHARACTERIZATION AND IN VITRO STUDIES

Jai Kumar, Ramesh Kumar (), Arti Jangra (), Devender Singh (), Harish Kumar (), Suresh Kumar (), Parvin Kumar () and Radhika Khanna ()
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Jai Kumar: Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119, India
Ramesh Kumar: Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119, India
Arti Jangra: Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119, India
Devender Singh: ��Department of Chemistry, Maharshi Dayanand University, Rohtak, Haryana 124001, India
Harish Kumar: ��Department of Chemistry, School of Basic Sciences, Central University of Haryana, Mahendergarh, Haryana 123029, India
Suresh Kumar: Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119, India
Parvin Kumar: Department of Chemistry, Kurukshetra University, Kurukshetra, Haryana 136119, India
Radhika Khanna: �Department of Chemistry, Babu Anant Ram Janta College, Kaul 136021, India

Surface Review and Letters (SRL), 2025, vol. 32, issue 10, 1-13

Abstract: A novel series of tetraaza macrocyclic complexes of biological importance was synthesized by “in situ†template reaction between triethylenetetramine and dibenzoylmethane in the presence of trivalent Fe and Cr metal salts in 1:1:1 molar ratio. These complexes are represented by molecular formula [M(C21H26N4)X]X2; M=Fe(III) and Cr(III); X=Cl−, NO3−, −OAc; C21H26N4=macrocyclic ligand. The reported complexes were characterized by using various physicochemical and spectroscopic techniques including elemental analyses, molar conductance, thermo-gravimetric analysis, FTIR, UV–Visible and mass spectral studies. The results obtained from analytical techniques and spectroscopic techniques together suggested the complexes have a square pyramidal geometry. Various computational studies were performed including molecular docking and modeling. Further, macrocyclic complexes were also screened for their “in vitro†antimicrobial activity against selected bacterial and fungal strains. The antioxidant activity of these complexes was also evaluated. Some of the complexes were found to possess remarkable antimicrobial activity and antioxidant activity. However, complex [Fe(C21H26N4)(NO3)](NO3)2 was found to be most potent against selected bacterial and fungal strains. On the other hand, complex [Cr(C21H26N4)(NO3)](NO3)2 was found to show best antioxidant activity with lowest value of IC50.

Keywords: Macrocyclic complexes; template method; antibacterial activity; molecular docking and molecular modeling (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1142/S0218625X24501294

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