Abstract
Two new complexes, [Co(MPAFA)3](ClO4)2 (1) and [Ni(MPAFA)3](NO3)2·2H2O (2), of an ‘NN’ bidentate Schiff-base ligand, N-(furan-2-ylmethyl)-1-(5-methyl-1H-pyrazol-3-yl)methanimine (MPAFA), have been synthesized and characterized by physicochemical and spectral methods such as elemental analyses, conductance, IR, UV-Vis, and emission spectra. In both complexes, three ligands coordinate with a metal ion to form 1:3 complexes. Both 1 and 2 are distorted octahedral and cationic, behaving as 1:2 electrolytes. IR spectra showed that each of the ligands coordinates via the pyrazolyl tertiary nitrogen and the azomethine nitrogen atoms. Single crystal X-ray studies confirmed CoN6 and NiN6 coordination for 1 and 2, respectively, and showed that both complexes exhibit π…π stacking and various hydrogen bonding interactions. Both 1 and 2 are fluorescent and participate in DNA binding with calf thymus DNA (CT-DNA) via groove binding.
Acknowledgment
Suman Mandal is thankful to the University of Kalyani for providing financial support in the form of a University Research Fellowship. The financial assistance received from the University of Kalyani in the form of a Personal Research Grant is thankfully acknowledged by N.C. Saha. The authors are thankful to the DST-FIST (Level-2; SR/FST/CS-II/2019/96) program for providing instrumental facilities in the Department of Chemistry, University of Kalyani.
Disclosure statement
No potential conflict of interest was reported by the authors.