Cu3(4-chloropyrazolate)3 is presented herein to exhibit unprecedented room-temperature white phosphorescence by modulating monomeric blue and excimeric yellow phosphorescence.

We describe silver clusters which unexpectedly transform from cyclic trinuclear complexes and σ-donating phenylacetylene, featuring a noria-like conformation. The introduction of Cu ions leads to isomorphic clusters which boost emission efficiency.

Atomically precise copper(I) nanoclusters (CuNCs) with high photoluminescence (PL) efficiency and relatively short lifetime could be promising non-precious metal-based phosphorescent emitters for organic light-emitting diodes (OLEDs), but the synthesis of...

It is a significant challenge to achieve a high photoluminescence quantum yield of Cu(I) complexes, particularly for red Cu(I) emitters, because of their considerable reorganization energy and weak spin−orbit coupling. Herein, we report a red phosphorescent cyclic trinuclear Cu(I) complex (denoted as 1), which was formed by reacting alkyl-substituted pyrazole ligands (4-isobutyl-3,5-dimethyl-1H-pyrazole) with in situ generated Cu(I) ions. Complex 1 was nonemissive in a pure tetrahydrofuran (THF) solution, whereas it emitted intense red light when its molecules were aggregated by adding water to the THF solution. Near-unity photoluminescence quantum yields were achieved in a mixed solvent of THF/water (f e = vol water / vol water+THF , f e = 90%), poly(methyl methacrylate) films, and in the solid state. Photophysical analysis and theoretical calculations revealed that the excellent photoluminescence performance was due to the aggregation-enhanced emission. In the aggregation state, cuprophilic interactions dominated the excited state, and the restricted movement of alkyl through CH•••C/CH•••π interactions diminished nonradiative transition. A cyclic trinuclear Cu(I) complex was used to fabricate a nondoped organic light-emitting diode (OLED), which is the first instance of such Cu(I) materials.

Multistimuli-responsive luminescent materials, showing obvious alteration of emission colours or intensity toward multiple external stimuli, have extensively appealed interests of related researchers for decades, but the tailored synthesis of such...