The electric and thermoelectric properties of Cu(II)-Schiff base nano-complexes

Abstract

The physical properties, such as electric and optical properties, of metal-Schiff base complexes have been widely investigated. However, their thermoelectric (TE) properties remain unreported. This work presents Cu(II)-Schiff base complexes as promising materials for TE power generation. Therefore, three Cu(II)-Schiff base complexes (namely,The electric and TE properties have been studied and comprehensive discussions have been presented to promote the nano-complexes (NCs) practical applications in the field of TE power generation. The electrical measurements confirm that the NCs are semiconductors and the electrical conduction process is governed by intermolecular and intramolecular transfer of the charge carriers. The TE measurements reveal that the Cu(II)-Schiff base NCs are nondegenerate P-type semiconductors. The measured Seebeck coefficient values were higher compared to the values reported in previous works for other organic materials indicating that the complexes under study are promising candidates for theremoelectric applications if the electrical conductivity could be enhanced.

Novel azomethine Pd (II)‐ and VO (II)‐based metallo‐pharmaceuticals as anticancer, antimicrobial, and antioxidant agents: Design, structural inspection, DFT investigation, and DNA interaction

“…Figures S3 and S4). Furthermore, the appearance of bands in area 537 to 557 cm −1 is referred to metal‐oxygen bond and in the area 468 to 449 cm −1 to metal‐nitrogen bond confirm formation of the desired complexes. Importantly, appearance of wide bands at 3423 to 3447 cm −1 in the spectra of metal‐imine complexes refers to molecules of water, which were hydrated.…”

“…DMSO solutions of the as‐prepared imine complexes show a large absorption band at 335 to 415 nm, which is due to the coordination of the nitrogen atom in the NBA ligand with the metal ions, which causes electrons to transfer from the ligand to the metal. Moreover, a new absorption band was observed at 413 to 415 nm, which was assigned to the d‐d transition for all the metal complexes . These results lend further support that the NBA ligand is coordinated to the metal ions in the as‐prepared complexes (cf.…”

“…In addition, the existence of bands at 819 to 838 cm −1 referred to the molecules of water, which were coordinated in all metal‐imine complexes . The IR spectra of the prepared VO (II) complex shows a band at 990 cm −1 , which is assigned to vibration of VO (II) in monomeric complexes …”

“…For this study, three human cancer cell lines were utilized in our in vitro screening experiments. These included breast cancer (MCF‐7), colon carcinoma (HCT‐116), and human liver carcinoma (HepG2) cell lines, as thoroughly discussed in the Supporting Information.…”

“…We tested the biocidal screening of the new NBA imine ligand and its metal chelates versus different strains of bacteria ( Serratia marcescens (−ve), Escherichia coli (−ve), and Micrococcus luteus (+ve)) through using nutrient agar as a good diffusion method . The antifungal activity of the compounds was also checked using the diffusion method against certain strains of fungi ( Aspergillus flavus , Geotrichum candidum , and Fusarium oxysporum ) with potato dextrose agar (PDA) as circumference as mentioned in detail in our previous work …”