High triplet energy host material with a 1,3,5-oxadiazine core from a one-step interrupted Fischer indolization.

Energy-efficient and deep-blue organic light-emitting diode (OLED) with long operating stability remains a key challenge to enable a disruptive change in OLED display and lighting technology. Part of the challenge is associated with a very narrow choice of the robust host materials having over 3 eV triplet energy level to facilitate efficient deep-blue emission and deliver excellent performance in the OLED device. Here we show the molecular design of new 1,3,5-oxadiazines (NON)-host materials with high triplet energy over 3.

Linear Gold(I) Halide Complexes with a Diamidocarbene Ligand: Synthesis, Reactivity, and Phosphorescence.

A series of halide and pseudohalide gold complexes (DAC)Au(I)X (DAC = ,'-diamidocarbene; X = Cl, Br, I, and SCN) were prepared in high yields. All complexes possess linear geometry around the gold atom with no aurophilic interactions between neighboring molecules. Reactivity studies for (DAC)Au(I)Cl revealed that the diamido backbone of the carbene ligand is vulnerable to nucleophilic attack by a strong base, potassium -butoxide, resulting in cleavage of the carbene backbone and formation of a neutral trigold cluster.

Highly phosphorescent carbene-metal-carboranyl complexes of copper(I) and gold(I).

New phosphorescent "carbene-metal-carboranyl" (CMC) Cu(I) and Au(I) complexes based on the diamidocarbene (DAC) ligand show up to 68% photoluminescence quantum yield and microsecond range lifetimes. CMC organic light emitting diodes (OLEDs) emit sky-blue and warm white electroluminescence.

Accuracy of telephone screening tools to identify dementia patients remotely: systematic review.

The COVID19 pandemic highlighted the need for remote diagnosis of cognitive impairment and dementia. Telephone screening for dementia may facilitate prompt diagnosis and optimisation of care. However, it is not clear how accurate telephone screening tools are compared with face-to-face screening.