Aerobic Oxidative Coupling of 2‑Naphthol Derivatives Catalyzed by a Hexanuclear Bis(μ-hydroxo)copper(II) Catalyst

A novel hexanuclear bis­(μ-hydroxo)­copper­(II) complex, [<b>L</b>₃(Cu₂(μ-OH)₂)₃]­(ClO₄)₆ (<b>1</b>), was synthesized with dinucleating ligand <i>N</i>,<i>N</i>,<i>N</i>,<i>N</i>-tetra­(pyridin-2-ylmethyl)-<i>m</i>-xylene diamine (<b>L</b>). Complex <b>1</b> is fully characterized by X-ray crystallography and magnetic susceptibility in the solid state and UV–vis and electron paramagnetic resonance spectroscopy in solution. The molecular structure of <b>1</b> possesses three dicopper cores, in which two copper centers are bridged by two hydroxide groups and separated by a distance ranging from 2.8852(15) to 2.8937(10) Å. In addition, the three dicopper cores are linked by the dinucleating ligand between each pair of adjacent dicopper cores. Importantly, aerobic oxidative coupling of 2,4-di-<i>tert</i>-butylphenol, 2-naphthol, and six 2-naphthol derivatives was achieved in 33–96% yield using complex <b>1</b> as a catalyst

All-Solid-State Li-Ion Battery Using Li_1.5Al_0.5Ge_1.5(PO₄)₃ As Electrolyte Without Polymer Interfacial Adhesion

Solid-state lithium-ion batteries are promising candidates for energy storage devices that meet the requirements to reduce CO₂ emissions. NASICON-type solid-state electrolytes (SSE) are most promising materials as electrolytes for high-performance lithium ion batteries because of their good stability and high ionic conductivity. In this study, we successfully fabricate NASICON-based Li_1.5Al_0.5Ge_1.5(PO₄)₃ lithium fast-ion conductors through melt-quenching with post-crystallization. The effect of crystallization temperature on the structure of LAGP and their ionic conductivity is systematically studied using Rietveld analysis of Synchrotron X-ray powder diffraction patterns, multinuclear magnetic resonance, and electrochemical analysis, revealing that the mobility of Li ion is dependent on crystallization temperature. The glass–ceramic LAGP annealed at 800 °C for 8 h exhibits the highest conductivity of 0.5 mS cm^–1 at room temperature. Moreover, we report the viability of the prepared LAGP glass−ceramic as a solid electrolyte in Li-ion batteries without polymer adhesion. The cycling of Li/LAGP/LFP all-solid-state cell, provides a stable cycling lifetime of up to 50 cycles. This approach demonstrates that LAGP glass–ceramic can have good contact with the electrodes without interfacial layer and can deliver a reasonable discharge capacity after 50 cycles