In Situ Synthesis of Metal–Salophene Complexes on Intercalated Graphene

Abstract

On-surface metalation provides a tool to vary magnetic and electronic properties of metal−organic complexes and produces clean samples of the desired product. We used this technique to metalate 5,5′-dibromosalophene with the 3d transition metals Co, Fe, and Cr on Co-intercalated graphene grown on Ir(111). The metalation process was investigated by X-ray photoelectron spectroscopy (XPS). The electronic structure of the obtained salophene complexes was investigated using a combination of scanning tunneling microscopy and spectroscopy with density functional theory calculations. XPS data show that deposition of the transition metals at 398 K causes the metal atoms to interact with the molecules, while higher temperatures are needed to complete the reaction. Furthermore, we are able to distinguish the three different metal−organic complexes by their electronic structure.

Targeted synthesis of two iron(III) tetradentate dibasic chelating Schiff base complexes toward inhibition of acidic induced steel corrosion: Empirical and DFT insights

“…The energy gap ( E g ) = E LUMO − E HOMO are smaller in case of complexes than that of ligand due to chelation of ligand to metal ions (Table 8 and Figure 13). [ 78 ] The lowering of E g in complexes compared with that of ligand explains the charge transfer interactions upon complex formation. The polarity of the complex is much larger than the free ligand.…”

Designing metal chelates of halogenated sulfonamide Schiff bases as potent nonplatinum anticancer drugs using spectroscopic, molecular docking and biological studies

“…Moreover, the iodide substituents gave more induced LUMO level stability than the bromide substituents due to the relatively large size of iodide and hence increases the electrophilic character 45 . Furthermore, the high negative total energy of the complex [Ni(SB 5 -H)(OH)(H 2 O)], E T = -1370 Hartree, indicates the great stability of the isolated complex compared to its free ligand 46 . Besides, the distortion of the standard square planar geometry of the complex Ni(II)-SB 5 S2 and Fig.…”

Template Synthesis of Ni(II) and Zn(II) Complexes Derived from N2O2 Donor Symmetrical Tetradentate Ligands System: Comparative Antioxidant, Xanthine inhibitory, and Computational Studies

“…This route has the advantage of producing a high yield while saving time (Kong et al, 2019;Lind et al, 2022). Yet, one disadvantage of this strategy is that the byproduct educts of the in-situ reaction may occasionally alter the composition of the final product (Elsebach et al, 2020). This occurs only in rare cases and can be avoided by determining the actual limiting reagent among the precursors prior to the start of the reaction.…”