Highly phosphorescent (Ph P) [MnBr ] as a low-cost and environmentally benign emitting material achieves peak current efficiency of 25.4 cd A and external quantum efficiency (EQE) of 7.2% for nondoped organic light-emitting diodes, and peak current efficiency of 32.0 cd A and EQE of 9.6% for doped devices with 20% (Ph P) [MnBr ]:27% TCTA:53% 6DCZPPY as a doping emitting layer.

White OLEDs with an external quantum efficiency (EQE) of 2.8%, maximum brightness (L) of 1547 cd m−2, current efficiency (ηc) of 5.14 cd A−1 and power efficiency (ηp) of 2.53 lm W−1 were fabricated using a newly developed EuIII-tetrakis-β-diketonate compound.

We demonstrate a proof-of-concept design of a new platform for proton recognition and modulation. The new proton receptors are derived from a unique class of synthetic supercontainers that exhibit exceptional proton binding capacity (over 50 equiv.) and intriguing proton-dependent fluorescent switching behavior. Experimental and computational studies suggest that the proton-responsive event involves a two-step mechanism pertaining to proton binding by both amino and pyrenyl moieties of the supercontainer constructs. The high proton binding capacity of the supercontainers can be further modulated via small-molecule "regulators" that compete for the proton-binding sites, opening exiting new opportunities for proton manipulation in both chemistry and biology.