Strongly emissive copper(i) halide complexes constructed from a new tetradentate chelating ligand and butterfly-shaped Cu₂X₂ cores are presented and systematically investigated.

A novel tetranuclear Ag(I) complex, [Ag₄(μ-DMPTP)₂(POP)₃][BF₄]₂ (Ag₄N₂P₃), has been designed to achieve highly efficient thermally activated delayed fluorescence (TADF). Photophysical investigations show that the compound exhibits highly efficient TADF (Φ = 76%) and has a very short ambient-temperature TADF decay time of only 0.65 μs, corresponding to a radiative decay rate of k = Φ/τ = 1.2 × 10⁶ s⁻¹, a value belonging to the fast radiative rates in TADF materials.

Luminescent Cu(i) iodide complexes featuring neutral diimine and phosphine ligands were prepared, in which structural rigidity might contribute to CIEE.

Anionic POMs prefer to bond with positive metal cations instead of neutral or negative organic ligands. Therefore, it is challenging to synthesize POM-based MOFs, let alone bi-POM-based host–guest MOFs. In this work, an unprecedented bi-POM-based host–guest MOF, Na[Ni(enMe)₂]₄[Ni(enMe)₂(H₂O)₂]₂{[Ni₆(μ₃-OH)₃(enMe)₃ (SIP)_1.5(B-α-PW₉O₃₄)]₂[H₃PNiW₁₁O₄₀]}·5enMe·33H₂O (1), with Ni₆-capped [PW₉O₃₄] as the node of the host framework and Keggin-type [PNiW₁₁O₄₀] units as the guest was synthesized. 1 showed excellent chemical stability towards aqueous solutions of pH 2–12 at both ambient and boiling temperature, providing opportunities for its application in fresh water harvesting from air.