Newly synthesized homomultinuclear Co (II) and Cu (II) bissalamo‐like complexes: Structural characterizations, Hirshfeld analyses, fluorescence and antibacterial properties

Abstract

Rare homodinuclear Co (II) complex [Co2(L)NO3] (1) and helical centrosymmetric homotetranuclear Cu (II) complex [Cu4(L)2(H2O)2]·2ClO4 (2), have been synthesized by a newly explored bis (salamo)‐like tetraoxime ligand (H3L) with Co (NO3)2·6H2O and Cu (ClO4)2·6H2O, respectively, and characterized by elemental analyses, IR, UV–Vis spectroscopy and single crystal X‐ray crystallography. X‐ray crystallographic studies indicate that the two Co (II) atoms (Co1 and Co2) in complex 1 have different N2O4 and N2O3 coordination spheres, and distorted octahedral (Co1) and slightly distorted triangular bipyramidal (Co2) geometries, while Cu (II) atoms in complex 2 have also two different N2O4 (Cu1) and N2O3 (Cu2) coordination environments, and complex 2 forms a helical centrosymmetric molecule. In addition, supramolecular interactions, Hirshfeld surfaces analyses, antibacterial and fluorescence properties were also investigated in detail.

Insight into Rare Structurally Characterized Homotrinuclear CuII Non-Symmetric Salamo-Based Complex

“…455 and 512 cm −1 [54], respectively. These results support the proposal that strong binding participations have occurred in the Cu II complex [39].…”

“…The fluorescence on-off phenomenon in the coordination reaction of the salamo-based ligands and Cu II ions can be used to identify and detect Cu II ions in the environment [39][40][41][42]. According to a large amount of preliminary research works [43][44][45][46][47][48][49], here, a non-symmetrical salamo-derived compound H 2 L was prepared, several single crystals of its Cu II complex were obtained by natural evaporation method in chloroform/ethanol mixed solvent at room temperature in about one month, and the structures and properties of H 2 L and its Cu II complex were further characterized by various modern analytical techniques.…”

Small Molecule Optical Probes for Detection of H2S in Water Samples: A Review

“…“Salen-type” ligands are a class of coordination compounds produced when a bisaldehyde condenses with a diamine. The introduction of large electronegative oxygen atoms to the CN–group of salen-type ligands results in salamo-type probes with improved coordination flexibility, structural stability, high selectivity, and sensitivity. − Based on this background, Guo et al prepared a rigid structured fluorescent probe 1 with naphthol units and π-conjugation for dual-channel detection of H 2 S . The sensor worked in a wide pH range of 4–9 with a response time of <3 s. The deprotonation of the hydroxyl groups hindered the ICT in the probe in the presence of H 2 S, which resulted in vivid changes in the FL intensity, facilitating the detection of the biothiol.…”

Synthesis and Antimicrobial Activities of Salicylaldehyde Schiff Base-Cu(II) Complex and Its Catalytic Activity in N-Arylation Reactions

“…Such complex gives hope for finding new antimicrobial agents for controlling these infectious agents, especially in hospital environment. [53][54][55]…”