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An acceptor–donor–acceptor organic semiconductor enables near-infrared organic light-emitting diodes with reduced efficiency roll-off over six orders of magnitude of excitation current density, enabling a maximum luminance of 2,000 W sr⁻¹ m⁻².

The Mannich reaction is a three-component reaction for preparing alkylamines, but the nucleophilic components rely on C(sp²)−H and activated C(sp³)−H bonds. Here, the authors report an unprecedented multicomponent double Mannich alkylamination for both C(sp²)−H and unactivated benzylic C(sp³)−H bonds.

Although transition metal-based complexes featuring metal atoms in formally negative oxidation states are known, their stabilization without an organic ligand remains challenging. Now, lanthanide–nickel intermetallic complexes featuring an organic-ligand-free Ni²⁻ ion bound to electropositive lanthanides have been stabilized in fullerenes.

Multi-resonance materials possess narrow emission spectra, desirable for high-definition organic light-emitting diodes, but most are based on a boron-nitrogen skeleton, providing limited opportunities to expand the scope of these materials. Here, the authors report carbonyl-nitrogen skeleton 5,12-dihydroquinolino[2,3-b]acridine-7,14-dione and develop three multi-resonance materials with efficient green emissions and high photoluminescence quantum yields, and further demonstrate their promise through the fabrication of efficient hyperfluorescence OLEDs.

The realization of circularly polarized organic light-emitting diodes with narrow-spectrum emission and high efficiency is challenging. Here, authors report an approach for these devices by developing chiral thermally activated delayed fluorescence sensitizers for achiral multi-resonance emitters.

Strategies to construct circularly polarized luminescence (CPL)-active materials with color modulation and handedness of CPL are desirable for the synthesis of chiral photo-responsive devices. Here the authors develop a CPL system based on styrylpyrenes. Benefiting from CH-π interactions between chromophores, the styrylpyrene aggregates show color-dependent CPL property and photo-responsive behavior.

The inefficient spin-flip process of multi-resonance emitters could compromise the device performance of light-emitting diodes. Here, the authors incorporate conformationally flexible donor to enhance the density of excited states, achieving 20-fold increase in reverse intersystem crossing rate.

Molecular electronics holds promise for building memristor at nanoscales for in-memory computing. Li et al. design tailored foldamers with furan-benzene and thiophene-benzene stacking to achieve voltage triggered quantum interference switching for potential random number generator application.

Most applications of aggregation-induced emission luminogens (AIEgens) have been limited in small animal models. Here, the authors show the versatility of AIEgens-based imaging-guided surgical operation from small animals to rhesus macaque, in support of the clinical translation of AIEgens.

Oligofurans have attracted great attention because of their strong fluorescence, charge delocalization, and increased solubility. Here the authors show a bottom-up modular construction of chemically and structurally well-defined oligo(arylfuran)s by de novo synthesis of α,β′-bifuran monomers and late-stage bromination, stannylation and subsequent coupling reaction.

Though organic emitters with room temperature phosphorescence (RTP) are attractive for various applications, realizing highly efficient and long lifetime emission remains a challenge. Here, the authors report the role of push-pull electronic effects on emission for organic RTP emitters.

Thermally activated delayed fluorescence materials are important for the development of OLED materials but the development of robust blue emitting materials remains challenging. Here, the authors report three highly efficient blue and deepblue delayed fluorescence materials demonstrating excellent electroluminescence performance.

High power efficiency and low roll-off values are essential to the commercialization of white organic light-emitting diodes. Here, the authors construct all-fluorescence devices with an orange emitting layer sandwiched between two sky-blue emitting layers, achieving figure-of-merit of 130.7 lm/W.

Molecular potentiometers that can indicate displacement-conductance relationship, and predict and control molecular conductance are of significant importance but rarely developed. Here, the authors design a robust single-molecule potentiometers based on helical structures and give insight in fundamental understanding of charge transport in higher-order helical molecules.

In this study, we coordinated the ionic current and the fluorescence signal to reveal that the gatekeepers (here, oligomers) open and close the nanochannels with an ‘onion-like’ intermediate state, as confirmed by molecular dynamics simulations. The dual-signal-output nanochannels exhibited a high sensitivity and selectivity to glucose and showed a high antijamming property. Ten healthy individuals’ urine samples were distinguished from those of 15 diabetes patients; moreover, the urine samples of the diabetes patients could be discriminated before and after treatment with insulin.

A promising sensitization strategy is proposed for blue MR-TADF emitters by constructing interlayer-sensitizing configuration, and high-performance blue hyperfluorescence OLEDs with high EQEs and narrow EL spectra are realized.

Xiaoqing Yi et al. report a co-drug delivery micelle system that demonstrates a high therapeutic efficacy for cancer. This system shows a much improved drug load, photostability, and production of reactive oxygen species, compared to traditional photosensitizer-loaded nanoparticles.