TADF and X-ray Radioluminescence of New Cu(I) Halide Complexes: Different Halide Effects on These Processes.

A series of complexes [CuX(PicPO)] (X = Cl, Br, I) based on tris(pyridin-2-ylmethyl)phosphine oxide (PicPO) has been synthesized. At 298 K, these compounds exhibit thermally activated delayed fluorescence (TADF) of (M+X)LCT type with λ varying from 485 to 545 nm, and quantum efficiency up to 54%. In the TADF process, the halide effect appears as the emission intensification and bathochromic shift of λ in the following order X = I < Br < Cl.

A new subclass of copper(I) hybrid emitters showing TADF with near-unity quantum yields and a strong solvatochromic effect.

We introduce here a new subclass of copper(I) hybrid emitters simultaneously containing [CuI] anions and Cu cations, separated in space by a Janus head ligand. When UV-irradiated at 298 K, these unique "Two-In-One" hybrids exhibit a short-lived green TADF with near-unity quantum yield and a strong solvatochromic effect. Moreover, they manifest a strong radioluminescence upon X-ray irradiation.

Trigonal Planar Au@Ag Clusters Showing Exceptionally Fast and Efficient Phosphorescence in Violet to Deep-Blue Region.

We report here a series of original ligand-supported trigonal planar Au@Ag clusters exhibiting bright solid-state phosphorescence in violet to deep-blue range (λ =410-442 nm) with remarkably short decay times (0.36-1.36 μs) and up to 96 % emission quantum yield at 298 K.

Controllable Synthesis and Luminescence Behavior of Tetrahedral Au@Cu and Au@Ag Clusters Supported by tris(2-Pyridyl)phosphine.

We report herein a family of polynuclear complexes, [Au@Ag(PyP)]X and [Au@Cu(PyP)]X [X = NO, ClO, OTf, BF, SbF], containing unprecedented Au-centered Ag and Cu tetrahedral cores supported by tris(2-pyridyl)phosphine (PyP) ligands. The [Au@Ag] clusters are synthesized controlled substitution of the central Ag(I) ion in all-silver [Ag@Ag] precursors by the reaction with Au()Cl, while the [Au@Cu] cluster is assembled through the treatment of a pre-organized [Au(PyP)] metallo-ligand with 4 equiv of a Cu(I) source. The structure of the Au@M clusters has been experimentally and theoretically investigated to reveal very weak intermolecular Au-M metallophilic interactions.

New Cu(i) halide complexes showing TADF combined with room temperature phosphorescence: the balance tuned by halogens.

A series of Cu(i) halide complexes derived from tris(2-pyridyl)phosphine (Py3P), [Cu2(Py3P)2X2] (X = Cl, Br, I), have been synthesized by a straightforward reaction in solution or through a mechanochemical route. At room temperature, the solid complexes exhibit bright dual-mode photoluminescence (λmax = 520-550 nm, τ = 14.5-20.