In this study, two compounds of TiNb₂O₇ and Ti₂Nb₁₀O₂₉ were successfully synthesized by mechanochemical method and post-annealing as an anode material for lithium-ion batteries. The effect of annealing atmosphere on the morphology, particle size, and electrochemical characteristics of two compounds was investigated. For these purposes, the reactive materials were milled under an argon atmosphere with a certain mole ratio. Subsequently, each sample was subjected to annealing treatment in two different atmospheres, namely argon and oxygen. Phase and morphology identifications were carried out by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) to identify the phases and evaluate the morphology of the synthesized samples. The charging and discharging tests were conducted using a battery-analyzing device to evaluate the electrochemical properties of the fabricated anodes. Annealing in different atmospheres resulted in variable discharge capacities so that the two compounds of TiNb₂O₇ and Ti₂Nb₁₀O₂₉ annealed under the argon atmosphere showed a capacity of 60 and 66 mAh/g after 179 cycles, respectively, which had a lower capacity than their counterpart under the oxygen atmosphere. The final capacity of the annealed samples in the oxygen atmosphere is 72 and 74 mAh/g, respectively.

In this paper, the biological applications of synthetic dysprosium(III) complex, with 4,5-diazafluoren-9-one (dafone) ligand, including DNA/BSA interaction, antibacterial and anticancer activity were studied in vitro. The bovine serum albumin (BSA) and fish DNA (FS-DNA) binding of the dysprosium complex were studied by multi-spectrophotometric as well as computational calculation. Its DNA and BSA binding ability were estimated by fluorescence, absorption, circular dichroism spectroscopy, and viscosity measurements (only for DNA). The Dy-complex binds to DNA and BSA presenting high binding constants. For both DNA/BSA binding, the negative signs of thermodynamic parameter confirmed that hydrogen bonds and van der Waals forces play a main role in the interaction process. The competitive experiments with ethidium bromide (EtBr) and rhodamine B exhibited that the Dy-complex interacts with DNA via groove binding. The BSA competitive experiments showed that Dy-complex interacts with site 3 of BSA, which was completely arranged by docking studies. This complex showed high antimicrobial and cytotoxicity. Besides, nanocarriers of Dy-complex were produced, and the anticancer activities of these compounds were measured. (This paper provides a manifestation of a new tradition by which Comments on Inorganic Chemistry starts publishing original research content that, nonetheless, preserves the Journal’s identity as a niche for a critical discussion of contemporary literature in inorganic chemistry) (For previous manifestations, see Comments Inorg. Chem. 2018, 38, 1–35; 2019, 39, 1–26; 2019, 39, 188–215; 2020, 40, 1–24; 2020, 40, 277–303; 2021, 1–46, doi: 10.1080/02603594.2021.1962310.)