Hierarchical luminescence center coupling enables time-dependent phosphorescence color from self-protective carbonized polymer dots.

Time-dependent phosphorescence color is attractive for various applications; however, the modulation mechanism of multiple luminescence centers is still confused. Herein, we proposed a hierarchical luminescence center coupling strategy to develop self-protective xylan carbonized polymer dots with time-dependent phosphorescence color. When using 1,3-diaminopropane as the cross-linker, the polymer dots feature a highly stable and rigid architecture, the clusterization-triggered phosphorescence of which is fully exploited to form hierarchical core-shell phosphorescence centers with different afterglow colors.

MiR-4429 Serves as a Protective Regulator by Targeting GNAI2 in Coronary Artery Disease.

Increasingly evidence suggests that microRNA (miRNA) plays a pivotal role in coronary artery disease (CAD). This study investigated the abundance of miR-4429 in the serum of CAD patients and explored the function of miR-4429 and its target GNAI2.A total of 164 participants were enrolled.

Precise Excited-State Engineering in Benzimidazole Derivatives via Donor-Acceptor Architecture for Organic Temperature-Responsive Phosphorescence.

Herein, we report precise excited-state engineering in benzimidazole (NBd) derivatives via a donor-acceptor (D-A) architecture for organic temperature-responsive phosphorescence (RTP). Four NBd derivatives (1-NBdCN, 1-NBdBrCN, 2-NBdCN, and 2-NBdBrCN) with an electron acceptor at position 1 and position 2 were designed and synthesized. The position of the electron acceptor enables 1-NBdCN and 1-NBdBrCN with temperature-responsive phosphorescence and endows 2-NBdCN and 2-NBdBrCN with red-shifted phosphorescence, showing a remarkable site effect.

Paper-Mill Waste Derived Bioplastic with Excitation- and Time-Dependent Phosphorescence Color for Sustainable Flexible Anti-Counterfeiting.

Bioplastics are developed to replace petrochemical-based plastics to address environmental pollution, but their practicality is limited (e.g., mechanical performance, cost, and wet stability).

Phenyl Spacer Modulation of 2,5-Substituted D-A-Type Siloles for Efficient Nondoped OLEDs.

Organic fluorophores with planar structures applied in organic light-emitting diodes (OLEDs) favor π-π stacking in aggregates, resulting in low photoluminescence quantum yields (PLQYs). Incorporation of molecular rotors such as phenyls on the periphery of fluorophores such as silole can prevent π-π stacking in aggregates to minimize fluorescence quenching. In this study, we introduced electron-donor (D) units (9,9-dimethylacridine and phenoxazine) at the positions 2 and 5 of tetraphenylsilole to form D-A-type molecules, in which the tetraphenylsilole unit acts as an electron acceptor (A).

Tunable Ultralong Organic Room-Temperature Phosphorescence of Dinaphthylamine Skeleton via Molecular Modification and Conformational Change in a Flexible Cross-Linked Polymer Network.

Herein, we developed a simple cross-linking strategy to fabricate a flexible PETA/MA polymer network featuring tunable ultralong organic room-temperature phosphorescence (UORTP). Three dinaphthylamine-structured phosphorescence molecules (NQA-1, NQA-2, and NQA-3), modified with an (iso)quinoline ring, were synthesized, and the tiny structural change made a great difference to their UORTP properties by controlling T excited states and intersystem crossing (ISC) efficiency. We thoroughly studied the UORTP performance in toluene solution, in PMMA film, in non-cross-linked copolymerized films, and in cross-linked films with three different cross-linkers.

Unveiling disparate urban-rural relations in China through catchment area mapping.

Sustainable urbanization in the Global South demands a comprehensive understanding of the intricate urban-rural relations in the face of rapid transformation. Traditional dichotomous urban-rural classification fails to thoroughly capture the convoluted interactions within the increasingly complex urbanizing landscape. Here, we reconstruct the urban-rural relationship in China by employing high-resolution satellite land-cover data in an urban-rural catchment area (URCA) framework to redefine urban-rural boundaries and quantify fine-grained connectivity.

Tracing the origin of near-infrared emissions emanating from manganese (II).

The enduring enigma surrounding the near-infrared (NIR) emission of Mn continues to ignite intense academic discussions. Numerous hypotheses have emerged from extensive research endeavors to explain this phenomenon, such as the formation of Mn-Mn ion pairs, Mn occupying cubically coordinated sites, as well as conjectures positing the involvement of Mn oxidized from Mn or defects. Despite these diverse and valuable insights, none of the hypotheses have yet achieved broad consensus.

Global Burden of Lip and Oral Cavity Cancer From 1990 to 2021 and Projection to 2040: Findings From the 2021 Global Burden of Disease Study.

Background: The aim of this study was to estimate the global burden of lip and oral cavity cancer (LOC) and its trends in different genders, age groups, regions, and countries globally.

Methods: Data were sourced from the Global Burden of Disease 2021 study.

Results: During the 32-year period, a 92.

Through-Space Electron Effect Regulated Selective Expression of Ultralong Organic Room Temperature Phosphorescence and Photochromism.

We report a through-space electron effect (TSEE) between two phosphorescent units that significantly modulates the selective expression of ultralong organic room-temperature phosphorescence (UORTP) and photochromism. A series of phosphorescent molecules (DNapTr, DNapBNT, DNapFL, and DNapPy), featuring two phosphorescent units connected by a nonconjugated spacer, were synthesized. Our findings reveal that both TSEE and the energy gap Δ (defined as - ) between the lowest triplet energy levels (T) of the phosphorescent units play crucial roles in determining UORTP and the photochromic behavior in PMMA films.

Blue-Light-Excitable Yellow Emissive One-Dimensional Hybrid Copper(I) Iodide for White-Light-Emitting Diode and Methanol Sensing Application.

Copper(I) halides are promising candidates for advanced optoelectronics, such as white-light-emitting diodes (WLEDs), scintillators, and photodetectors. Designing and synthesizing low-dimensional hybrid copper halides with blue-light excitation remains an enormous challenge. Herein, we have prepared two one-dimensional (1D) hybrid Cu(I)-based metal iodides, namely, (CHN)CuI and (CHN)CuI single crystals, by deliberately adjusting the ratio of the reactants 4-methylpyridine (4-MePy) and CuI.

Aggregation-enhanced TADF in deep-red emitters for high-performance OLEDs.

When isolated molecules undergo aggregation, their intermolecular interactions increase, potentially altering their electronic structures and affecting photophysical properties such as fluorescence lifetime. The extent of this change largely depends on the molecular structure. For thermally activated delayed fluorescent (TADF) materials, their luminescence mechanism in terms of the scale of increased lifetime from single molecules to aggregates and how that influences their optoelectronic device performance remain largely unexplored.

Design of Efficient Benzosilole Derivatives for Tuning High-Performance HLCT OLEDs.

Properties of hybridized local and charge-transfer (HLCT) materials can be tuned by adjusting locally excited (LE) and charge-transfer (CT) components, resulting in either quasi-equivalent hybridization or non-equivalent hybridization. These HLCT materials are easily designed on the molecular level to be applied in organic light-emitting diodes (OLEDs), which have advantages in the aspects of external quantum efficiency (EQE), efficiency roll-off, and color purity. In previous work, an HLCT silole derivative with an electron donor (D) - acceptor (A) structure modified at 1-position achieved a breakthrough in the external quantum efficiency (EQE) of 9.

Near-Infrared Organic Small-Molecule Photosensitizer With O Self-Supply for Cancer Photodynamic-Photothermal Synergistic Therapy.

Tumor hypoxia and heat resistance as well as the light penetration deficiency severely compromise the phototherapeutic efficacy, developing phototherapeutic agents to overcome these issues has been sought-after goal. Herein, a diradical-featured organic small-molecule semiconductor, namely TTD-CN, has been designed to show low exciton binding energy of 42 meV by unique dimeric π-π aggregation, promoting near-infrared (NIR) absorption beyond 808 nm and effective photo-induced charge separation. More interestingly, its redox potentials are tactfully manipulated for water splitting to produce O and reduction of O to generate O .

The Safety and Efficacy of inactivated COVID-19 vaccination in couples undergoing assisted reproductive technology: A prospective cohort study.

Background: The safety of the COVID-19 inactivated vaccine on pregnancy outcomes in couples undergoing assisted reproductive technology remains uncertain due to limited and speculative evidence. Existing studies primarily focus on the vaccination status of females, with scant information available regarding the vaccination status of male partners. Moreover, there is minimal research tracking live birth outcomes.

Identification and validation of ATP6V1G1-regulated phosphorylated proteins in hepatocellular carcinoma.

V-ATPase Subunit G1 (ATP6V1G1) is one of the subunits of Vacuolar ATPases. Previous studies have indicated that ATP6V1G1 plays important roles in hepatocellular carcinoma (HCC) and is associated with HCC progression. However, the effect of ATP6V1G1 in HCC requires further elucidation.

Lewis Acid Sites in Hollow Cobalt Phytate Micropolyhedra Promote the Electrocatalytic Water Oxidation.

The acid-base microenvironment of the metal center is crucial for constructing advanced oxygen evolution reaction (OER) electrocatalysts. However, the correlation between acidic site and OER performance remains unclear for cobalt-based catalysts. Herein, Lewis acid sites in hollow cobalt phytate micropolyhedra (M-CoPA, M = Cu, Sr) were synthesized by a cation-exchange strategy, and their OER performances were studied systematically.

Associations of artificial sweetener intake with cardiometabolic disorders and mortality: a population-based study.

Artificial sweeteners are generally used and recommended to alternate added sugar for health promotion. However, the health effects of artificial sweeteners remain unclear. In this study, we included 6371 participants from the National Health and Nutrition Examination Survey with artificial sweetener intake records.

Antithermal-Quenching All-Inorganic Perovskite Crystals with Green Ultralong Persistent Luminescence for Advanced Anticounterfeiting Applications.

Long persistent luminescence (PersL) materials have revolutionized many fields of optoelectronics and photonics due to their applications in anticounterfeiting, information encryption, and in vivo bioimaging. Here, we reported a novel PersL crystal prepared by the heterovalent doping of Sb into perovskite tetragonal phase RbCdCl, comparing with the pristine non-perovskite orthorhombic phase analogue without PersL property. Surprisingly, under the UV light irradiation, the title crystals concurrently exhibit green ultralong PersL (>2400 s), high photoluminescence quantum yield (49.

Site Effect of Electron Acceptors on Ultralong Organic Room-Temperature Phosphorescence.

Herein, we successfully observe the site effect of electron acceptors on ultralong organic room-temperature phosphorescence (UORTP) in the case of 7-benzo[]carbazole (BCz) derivatives: cyanophenyl on the nitrogen site can promote intersystem crossing (ISC) efficiency and enhance phosphorescence intensity by facilitating -π* transitions but make a slight change to the phosphorescence wavelength; cyanophenyl on the naphthalene site can cause a remarkable red shift of phosphorescence wavelength by reducing the T energy level of BCz derivatives and also enhance phosphorescence intensity by promoting ISC but weaken phosphorescence intensity by lowering the molecular symmetry. Three BCz derivatives (1-BCzPhCN, 2-BCzPhCN, and 3-BCzPhCN) with the electron acceptor cyanophenyl at different sites (nitrogen site and naphthalene site) were synthesized through a combination of the nucleophilic substitution reaction and the Suzuki coupling reaction. The phosphorescence properties of 1-BCzPhCN, 2-BCzPhCN, and 3-BCzPhCN in toluene solution, in a copolymerized MMA film, and in a PVA film were measured and analyzed.

Tunable Out-of-Plane Reconstructions in Moiré Superlattices of Transition Metal Dichalcogenide Heterobilayers.

The reconstructed moiré superlattices of the transition metal chalcogenide (TMD), formed by the combined effects of interlayer coupling and intralayer strain, provide a platform for exploring quantum physics. Here, using scanning tunneling microscopy/spectroscopy, we observe that the strained WSe/WS moiré superlattices undergo various out-of-plane atomically buckled configurations, a phenomenon termed out-of-plane reconstruction. This evolution is attributed to the differentiated response of intralayer strain in high-symmetry stacking regions to external strain.

Multi-Functional Silole Hole Transport Layer for Efficient and Stable Lead-Tin Perovskite and Tandem Solar Cells.

Despite high theoretical efficiencies and rapid improvements in performance, high-efficiency ≈1.2 eV mixed Sn-Pb perovskite solar cells (PSCs) generally rely on poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT: PSS) as the hole transport layer (HTL); a material that is considered to be a bottleneck for long-term stability due to its acidity and hygroscopic nature. Seeking to replace PEDOT: PSS with an alternative HTL with improved atmospheric and thermal stability, herein, a silole derivative (Silole-COOH) tuned with optimal electronic properties and efficient carrier transport by incorporating a carboxyl functional group is designed, which results in an optimal band alignment for hole extraction from Sn-Pb perovskites and robust air and thermal stability.

Sliding Ferroelectricity Induced Ultrafast Switchable Photovoltaic Response in ε-InSe Layers.

2D sliding ferroelectric semiconductors have greatly expanded the ferroelectrics family with the flexibility of bandgap and material properties, which hold great promise for ultrathin device applications that combine ferroelectrics with optoelectronics. Besides the induced different resistance states for non-volatile memories, the switchable ferroelectric polarizations can also modulate the photogenerated carriers for potentially ultrafast optoelectronic devices. Here, it is demonstrated that the room temperature sliding ferroelectricity can be used for ultrafast switchable photovoltaic response in ε-InSe layers.