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Four new AIE-active Ir(iii) complexes were synthesized. MFIrqa, SFIriqa and SFIrqa based NPs are shown to be good PSs in vitro for PDT through Type I ˙OH generation mechanism.

Nondoped organic light-emitting diodes (OLEDs) are of paramount importance for display and lighting applications owing to their advantages of facile fabrication and outstanding stability. However, nondoped OLEDs achieving extraordinary electroluminescence (EL) performance and low turn-on voltage (

The prominent pathological feature of fatty liver disease lesions is excessive fat accumulation in lipid droplets in hepatocytes. Thus, developing fluorescent lipid droplet-specific probes with high permeability and a high imaging contrast provides a robust tool for diagnosing fatty liver diseases. Herein, we rationally developed a novel donor-acceptor lipophilic fluorescent probe ANI with high photostability for wash-free visualization of lipid droplets and fatty liver disease characteristics. ANI showed a typical twisted intramolecular charge transfer effect with very faint fluorescence in high-polar solvents, but dramatically boosted emissions in low-polar environments. The solvatochromic probe can selectively light up lipid droplets with a high contrast in a wash-free manner. Further use of ANI to reveal the excessive accumulation of lipid droplets with a significantly large size in the liver tissues from the fatty liver disease model mice was successfully demonstrated. The remarkable imaging performances rendered ANI an alternative tool for accurately evaluating fatty liver disease in intraoperative diagnosis.

Constructing high-quality white organic light-emitting diodes (WOLEDs) remains a big challenge because of high demands on the electroluminescence (EL) performance including high efficiency, excellent spectral stability, and low roll-off simultaneously. To achieve effective energy transfer and trap-assisted recombination in the emissive layer, herein, four Ir(III) phosphors, namely

A feasible strategy through synergistic heavy-atom effect and methylation approach to suppress non-radiative pathway and accelerate ISC processes is demonstrated. As a result, efficient and long-lived phosphorescence is realized.

Stable one-dimensional coordination polymer is used as a highly selective sensor for the detection of TNP.

Molecular isomeric engineering is employed to construct efficient orange-red Ir(iii) complexes for WOLEDs and understand the intrinsic structure–property relationship.

An unprecedented fully reduced {MoV60} POM served as a cheap and robust molecular light-absorber model possessing wide light absorption and was applied to build a co-sensitized solar cell photoelectronic device.

Near-infrared (NIR) photosensitizers with rapid reactive oxygen species (ROS) production ability are in great demand owing to their promising performance toward boosting photodynamic therapy (PDT) and deep-tissue imaging, but molecular design guidelines for efficient photosensitizers are rarely elucidated. Herein, three AIEgens named DBP, TBP, and TBP-SO3 are designed and synthesized by precise donor-acceptor (D-A) molecular engineering to deeply understand the structure-property-application relationships. All the compounds exhibit AIE characteristics with strong long-wavelength emission in the aggregated state and are capable of efficiently producing ROS under white light irradiation. By controlling the ability of the D-A units, TBP-SO3 realizes NIR emission and more rapid ROS generation ability due to the promoted intersystem crossing processes compared with those of DBP and TBP. In addition, NIR-emitting TBP-SO3 is capable of specific endoplasmic reticulum targeting and excellent PDT treatment ability of cancer cells and bacteria. This successful example of molecular engineering paves a valuable way for developing advanced PSs with AIE properties, efficient ROS generation ability, and intense emission for fluorescence imaging PDT.

The direct usage of CO

Fully reduced polyoxometalates are predicted to give rise to a broad and strong absorption spectrum, suitable energy levels, and unparalleled electronic and optical properties. However, they are not available to date. Here, an unprecedented fully reduced polyoxomolybdate cluster, namely Na

As is well known, carbon dioxide (CO2) reduction reaction (CO2 RR) by photocatalytic technology is a means with great promise to alleviate the crises on the global energy and the environmental fronts. It is critical to design and construct photocatalysts with high performance as catalysts are the core of the photocatalytic process. Recently, polyoxometalates (POMs) have aroused wide research interest as CO 2 photoreduction-related catalysts because they possess tunable compositions, thermal stability, redox reaction and tailorable light-absorption capabilities. This review has discussed the recent progress of POMs and POM-based photocatalysts for CO 2 reduction focusing on the roles of POMs as photocatalysts, cocatalysts, photocatalytic hosts (photosensitizers), and multi-electron donors in systems of CO2 photoreduction, which can provide important guides for the design of high-efficiency photocatalysts. In the end, based on summarizing the previous work, we make a prospect to the future research direction, key challenges, and possible solutions in this field.