Hydrostatic pressure-induced transformations and multifunctional properties of Francium-based halide perovskite FrCaCl: Insights from first-principles calculations.

Under varying hydrostatic pressures ranging from 0 to 150 GPa, first-principles calculations were conducted to investigate the structural, electronic, bonding, optical, elastic, and mechanical characteristics of the Lead (Pb)-free halide perovskite FrCaCl using both the GGA and hybrid HSE06 parameterized density functional theory (DFT). Since the FrCaCl cubic perovskite has not yet been synthesized experimentally, its structural and thermodynamic stabilities are confirmed by the Goldschmidt tolerance factor, the octahedral factor, and the formation energy. The induction of pressure has caused a simultaneous decrease in both the lattice parameters and the electronic band gap.

Tandem dehydrogenation-olefination-decarboxylation of cycloalkyl carboxylic acids via multifold C-H activation.

Dehydrogenation chemistry has long been established as a fundamental aspect of organic synthesis, commonly encountered in carbonyl compounds. Transition metal catalysis revolutionized it, with strategies like transfer-dehydrogenation, single electron transfer and C-H activation. These approaches, extended to multiple dehydrogenations, can lead to aromatization.

Sol-Gel Route for the Synthesis of CoFe Er O Nanocrystalline Ferrites and the Investigation of Structural and Magnetic Properties for Magnetic Device Applications.

This study reports the formation of Er-doped nanocrystalline cobalt ferrite with the formula CoFe Er O (0.0 ≤ ≤ 0.10) from nontoxic metal precursors Co(NO)·6HO, Fe(NO)·9HO, and Er(NO)·5HO through an easy and economical sol-gel route in which citric acid is served as the chelating agent.