Synthesis, crystal structure and biological application of a Cu(II) coordination compound of 2-hydroxy-5-methyl-3-(pyridin-3-yliminomethyl)-benzaldehyde

Abstract

A Cu(II) compound, [Cu(L)2] (1) [HL = 2-Hydroxy-5-methyl-3-(pyridin-3-yliminomethyl)-benzaldehyde] has been characterized by single-crystal X-ray diffraction technique and other spectroscopic data. Presence of different noncovalent interactions leads to 3D supramolecular structure. Hirshfeld surfaces analysis is performed to investigate the extent of non-covalent interactions in the solid state. Compound 1 exhibits potential antibacterial activity against Gram-positive (S. aureus) and Gram-negative (E. coli) bacterial species. The measurement of ROS generation may also help to explain the mechanism of microbial action which may be due to one or multiple steps of signaling cascades ensuing in damaged cell wall synthesis or impaired cross-linking of polymer units. Furthermore, the compound improves cellular ROS in human liver cancer cells which in turn culminates in the death of cancer cells. The toxicity has been checked by MTT assay. The compound shows promising anticancer activity against HepG2 cell line and the LD50 is 62 μg/ml. The compound can also be employed for promising material applications; after theoretical and experimental investigations it is observed that the band gap is in the range of semiconducting material.