Anhui Normal University

MnBn(CO)5-Catalyzed Cascade C–H Activation/Annulation to Construct Bridged N -Heterocycles

Abstract Herein, a manganese-catalyzed synthesis of bridged heterocycles via a C–H activation/annulation cascade between azomethine imines and Morita–Baylis–Hillman adducts is described. MnBn(CO)5 serves as a highly active catalyst, exhibiting unique and remarkable capability in...

Palladium-Catalyzed Cascade 5- exo-dig Annulation and Amination for Assembly of Amino-Functionalized Trisubstituted Furans

Abstract A novel route for the preparation of trisubstituted furans with an amino functional group is presented as a palladium-catalyzed cascade 5-exo-dig annulation/amination reaction of α-alkynyl-α,β-enones with N-hydroxybenzamides. The reaction proceeds through a cascade seque...

Assessing Meteorological, Local, and Upwind Information for Surface Ozone Through Machine Learning: Implications for Sustainable Urban Air Quality in Hefei, China

Ozone (O3) pollution remains a significant air quality issue in Chinese cities. Identifying which monitoring and modelling information provides reliable incremental value is important for efficient and sustainable urban O3 assessment. This study explored the incremental informati...

UDSQ: a secure and efficient user-defined dynamic skyline query in online medical diagnosis

With the rapid development of information technology, online medical diagnosis services have become increasingly prevalent. These services improve healthcare accessibility for patients in regions with limited medical resources. However, online medical diagnosis still faces signif...

Interfacial M–O–P coupling drives active-site reconfiguration in CoMoO4 for high-current-density alkaline hydrogen evolution

Developing durable alkaline hydrogen evolution reaction (HER) cathodes capable of sustained operation at industrial current densities is critical for practical anion exchange membrane water electrolysis (AEMWE). Herein, phosphorus-modified CoMoO 4 nanoarrays (CoMoO 4 -P) are cons...

Improved estimation of net ecosystem CO 2 exchange over North America using LSTM-based flux upscaling (2001–2021)

Accurate estimation of regional-scale terrestrial carbon budgets is of great importance but remains challenging. With particular advantages, the Long Short-Term Memory (LSTM) network method shows potential for improving regional carbon budget upscaling estimations. Here, using LS...

Receptor-binding geometry constrains viral antigenic evolution through fitness-evasion coupling

Although viral antigenic evolution is shaped by the competing demands of immune evasion and receptor-binding fitness, the physical principles underlying divergent viral evolutionary dynamics remain poorly understood. Here, by integrating structural biology, deep mutational scanni...

Fe polarization site in Bi19S27Cl3 promotes near-infrared photocatalytic reduction of nitrate to ammonia

To address the issues of weak response in the near-infrared spectral region and slow NO 3 − reduction kinetics of traditional photocatalysts, this paper successfully synthesized a Fe-doped Bi 19 S 27 Cl 3 photocatalyst via a solvothermal method and applied it to the photocatalyti...

Deboronative Asymmetric Suzuki–Miyaura Cross-Coupling of Alkylboronic Esters Enabled by Dual Photoredox and Nickel Catalysis

Abstract The transition-metal-catalyzed asymmetric Suzuki–Miyaura cross-coupling of alkylboron reagents remains highly challenging, especially with racemic alkylboronic esters. Herein, we disclose the first enantioconvergent deboronative Suzuki–Miyaura cross-coupling of racemic a...

Growth and Physiological Responses of Brassica chinensis to Pristine and Fe/Mn-Modified Pteroceltis tatarinowii Biochar in Copper-Contaminated Soil

The ecological restoration of heavy metal-contaminated soil and the evaluation of its remediation efficacy have drawn considerable research interest. This 90-day pot experiment examined the effects of pristine and modified Pteroceltis tatarinowii biochars on Brassica chinensis gr...

\({\mathcal{W}}\)\({}_{\textrm{d}}\)-Convergence Rate of EM Schemes for Invariant Measures of Supercritical Stable SDEs

Abstract. By establishing the regularity estimates for nonlocal Stein/Poisson equations under [Formula: see text]-order Hölder and dissipative conditions on the coefficients, we derive the [Formula: see text][Formula: see text]-convergence rate for the Euler–Maruyama schemes appl...

Immersive affordances and problematic consumption in virtual reality erotic content use: extending a Cognitive-Behavioral Model

Abstract Existing cognitive-behavioral accounts of problematic technology use were developed for screen-based media and do not incorporate the distinctive immersive affordances of virtual reality (VR). Drawing on the Cognitive-Behavioral Model, this study tests an extended model...

Dual-Defects Engineering and Fe–S–Ga Bridging Synergy in Secondary Battery Anode Enable Fast-Charging and Durable Performances

Abstract Defect-engineering commonly enables improved energy-storage performance; however, how it synergizes with interfacial bond bridging to boost fast-charging capacity remains a challenge. Here, we develop a FeS2@Ga2S3 heterostructure as sodium-ion battery anode that integrat...

Hypothesis testing of covariance matrices in high-dimensional elliptical models

We propose a new two-sample test for high-dimensional covariance matrices under elliptical distributions. The unbiased and consistent estimators of the functions of covariance matrices are proposed in high-dimensional elliptical models. This allows us to introduce a modified stat...

Tandem Acylation/C–H Functionalization Cyclization to Access Indanone-Fused BODIPYs and Their NIR-Emissive α,α-Dimers with Deep LUMO Levels

Abstract Mono- and bis-indanone-fused BODIPYs are synthesized via tandem acylation and intramolecular C–H functionalization cyclization. This rigid fused-ring framework extends the π-conjugated system, affording red-shifted, intense absorption/emission and high quantum yields (>0...

Forecasting Crude Oil Futures Prices: A Stacking Model With Mixed‐Frequency Predictors, Machine Learning, and Forecast Combination

ABSTRACT Low‐ and high‐frequency data are widely used in crude oil futures price forecasting, and machine learning techniques exhibit strong performance. To enhance predictive accuracy, this study presents a stacking model that integrates mixed‐frequency predictors, machine learn...

Photoinduced Nickel-Catalyzed Cascade Cyclization and Cyanation of Functionalized Alkynes

Abstract We report a photoinduced nickel-catalyzed cyclization/cyanation of functionalized alkynes using 2-(diisopropylamino)acetonitrile as a practical cyanide surrogate. Under mild conditions with Cat. 1, KI, Zn, and 395 nm LED irradiation, the reaction affords diverse cyano-co...

Simulation-Based Multi-Scenario Assessment of Comprehensive Ecological Risk and Resilience: A Case Study of the Pearl River Delta

Under climate change, the demand for high-quality urban ecological security is rising. This study focuses on how rapid urbanization and climate change affect ecological risk, resilience, and land use functions (LUFs) spatial co-variation in the Pearl River Delta. Land use was sim...

Engineering an Electron-Rich Microenvironment in Ni–NiWO4 Heterostructures as High-Performance Electrocatalysts for H2 Production at High Current Density

Abstract Exploration of efficient and nonprecious electrocatalysts is essential to propel water electrolysis toward developing a sustainable world. Herein, we demonstrated heterogeneous Ni–NiWO4 nanostructures grown in situ on nickel foam (NF) (Ni–NiWO4/NF), serving as effective...

Controlled Synthesis of Tri‐ and Multi‐Doped Graphene

ABSTRACT Graphene possesses exceptional electrical, mechanical, and thermal properties, yet its lack of a bandgap and chemically inert surface continue to limit practical applications. Heteroatom doping has emerged as the primary strategy to overcome these limitations by tuning g...