OPTICAL MATERIALS
·
2025
·
IF 4.2
Qi Chen,Fang Lei,Ying Shi
Perovskite light-emitting diodes (PeLEDs) employing CsPbX 3 nanocrystals (NCs) face persistent challenges in balancing emission efficiency and spectral stability due to surface halide vacancies, which trigger nonradiative recombination, halide phase segregation, and self-doping effects. In this work, we address these limitations by introducing 3,5-dicarboxyphenylboronic acid (3,5-DA) as a multifunctional bidentate ligand additive. The unique coordination architecture of 3,5-DA, featuring multiple chelating groups, enables strong binding affinity to perovskite NC surfaces. This interaction effectively passivates halide vacancies while suppressing ion migration and defect formation. The optimized CsPb(Br/I) 3 NCs exhibit enhanced stability and suppressed nonradiative losses, enabling high-performance white LEDs (WLEDs). At a driving current of 10 mA, the fabricated WLEDs demonstrate a luminous efficiency of 10.32 lm·W −1 , a CIE coordinate of (0.3379, 0.3391), a correlated color temperature (CCT) of 5260 K, and an external quantum efficiency (EQE) of 6.48 %. This work provides a ligand engineering strategy to concurrently resolve efficiency-stability trade-offs in PeLEDs.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 9
·118212
·
IF 6.3
Xinyu Wang,Ruipeng Wang,Jianli Jiang,Haining Meng,Haigang Hou,Jian Yang,Guiwu Liu,Guanjun Qiao
PbTe-based thermoelectric materials are promising for mid-temperature waste heat recovery, yet n-type PbTe underperforms its p-type counterpart. Herein, high-performance n-type PbTe is achieved through I/Ge co-doping and in-situ composite engineering with Sb 2 Te 3 prepared by melting combined spark plasma sintering. Sb 2 Te 3 alloying introduce in-situ formed Sb/Sb 2 Te 3 precipitates. Furthermore, iodine doping optimizes the carrier concentration to ∼3.4 × 10 19 cm –3 , boosting the room-temperature electrical conductivity to ∼1404 S cm −1 and yielding a high power factor of ∼17.4 μW cm −1 K −2 for the PbTe-Sb 2 Te 3 sample. Meanwhile, lattice thermal conductivity is synergistically suppressed to ∼0.37 W m –1 K –1 at 673 K through Ge-induced point defects/off-center anharmonicity and Sb/Sb 2 Te 3 precipitates. This synergistic strategy results in a peak ZT of ∼1.30 at 823 K and a high average ZT of ∼0.91 at 323–823 K. This work demonstrates that synergistic I/Ge co-doping and composite precipitation effectively enhance thermoelectric performance in n-type PbTe.
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AGING CELL
·
2026
·Vol. 25
·期 2
·e70378
·
IF 7.1
Meiling Wang,Yumin Chang,Aojie He,Jing Yang,Ang Li,Hongqin Wang,Kah-Leong Lim,Xing Guo,Chengwu Zhang,Li Lu
Age-related memory decline is a hallmark of brain aging and a primary risk factor for neurodegenerative disorders. Microglia play a crucial role in preserving memory function by maintaining brain homeostasis through phagocytosis, yet the specific mechanisms governing this protective function remain elusive. In the present study, we identified a population of Secreted Phosphoprotein 1 (Spp1)-positive microglia in both aged mouse and human brains. To investigate the role of microglial Spp1 in aging, we generated microglia-specific Spp1 knockout (Spp1-cKO) mice. We demonstrate that Spp1 deficiency selectively precipitates memory deficits in aged mice, without affecting memory function in young mice, indicating an age-dependent reliance on Spp1 signaling. Microglial phagocytic capacity positively correlates with Spp1 levels and is diminished by Spp1 deficiency. Mechanistically, Spp1 deficiency leads to the downregulation of the AKT/mitochondrial complex I pathway, thereby compromising microglial oxidative phosphorylation and function. Notably, microglia-specific overexpression of Spp1 partially ameliorates the age-related phenotypes induced by Spp1 deficiency. In conclusion, this study is the first to reveal the crucial role of microglial Spp1 in brain aging and to uncover its underlying mechanism, providing novel insights into age-related memory decline.
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高影响因子
FOOD HYDROCOLLOIDS
·
2026
·
IF 12.4
Jiefen Cui,Xiaoxiao Zhang,Dan Liu,Jirong Wang,Yongkai Yuan,Jinkai Zheng
The relationship between pectin side chains and fermentability is crucial for understanding precision nutrition. In this study, α-L-arabinofuranosidase and β-galactosidase were used to remove arabinose and galactose side chains of citrus pectin. Effects of RG-I side chains on structural characteristics and in vitro fermentation property of pectin were investigated. The removal of arabinose and galactose side chains led to a decrease in molecular weight and branching degree of pectin, which in turn resulted in a loose spatial conformation. Based on correlation analysis and carbohydrate-active enzymes annotation, we concluded that the presence of arabinose in citrus pectin promoted the production of propionate and had no promoting effect on the proliferation of pathogenic bacteria of Escherichia and Klebsiella . The removal of the galactose side chain promoted proliferation of potentially beneficial bacteria ( Bifidobacterium , Faecalibacterium , Veillonella , and Parabacteroides ). We further found that arabinose produced propionate mainly via the succinate pathway and acrylate pathway, while galactose generated butyrate by activating phosphate butyryltransferase and butyrate kinase. Our results provide new insights into structure-function relationship between arabinose and galactose side chains and fermentability of pectin, while also offering a scientific reference for targeted design of pectin prebiotics with precise functionalities.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Yonghua Wang,Ruilin Wang,Yucheng Hu,Lin Zheng,Ganhua Fu,Gang Wang,Yufeng Zhou,Qiaomu Xie,Jingong Pan,Shou Peng
In recent years, the study of Cu (Ӏ) precursors in high-performance CdTe thin-film solar cell devices has received increasing attention. However, few studies have been reported on nanoscale Cu (I) precursors in large-area CdTe devices (≥1 cm 2 ). Here, three different Cu (Ӏ) nano precursors have been rapidly prepared by solution method (CuCl ethanol solution, CuI acetonitrile solution, and CuSCN aqueous ammonia solution) and their effects on the performance of commercial large-area CdTe thin-film solar cells have been investigated. The results show that the distribution amount and uniformity of the nano precursor particles on the CdTe back surface have a large impact on the device performance. The CuCl nanoparticles are more uniformly distributed and the device performance is more excellent. CuI nanoparticles easily formed clusters at grain boundaries. Denser distribution of CuSCN nanoparticles . The thermal diffusion conditions (temperature, time and precursor concentration) have a significant effect on the device performance, but the most reasonable thermal diffusion conditions tend to be the same for all devices. This suggests that the thermal diffusion conditions are determined by the nature of the CdTe absorber layer itself and are not interfered by different nano precursors.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jingyu Guo,Xiangtong Zhan,Jiating Lan,Xin Liu,Shuang Zhao,Xi Xu,Li-Ming Wu,Ling Chen
Birefringent crystals are the key components of functional optics, contributing significantly to scientific and technological advancements. To enhance birefringence, the presence of stereochemically active lone pairs offers a unique opportunity. In fact, strengthening the stereochemical activity and aligning uniformly lone pairs face tough challenges. Herein, an anisotropic layered crystal, Sb4O5I2, is discovered to exhibit enhanced birefringence. The influence of crystal symmetry on the birefringence of Sb4O5X2 (X = Cl, Br, or I) is found to be minor. Instead, the asymmetric nature of ABUCBs (i.e., cis-X3[SbO3]6– and cis-X3[SbO4]8–) plays a crucial role in enhancing the optical anisotropy. And the orientation of these ABUCBs is equally important. We demonstrate that by adjusting the Sb/I ratio from 5:1 to 2:1, all of the intralayer Sb atoms in Sb5O7I-P63 are forced onto the surface position. This structural adjustment leads to strengthened ionic bonding interactions, enhanced activity of the lone pairs, and uniform alignments of the ABUCBs in Sb4O5I2. Consequently, this results in a 6-fold increase in birefringence.
研究领域:
材料科学
·
光学
·
无机化学
·
晶体工程
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JOURNAL OF COORDINATION CHEMISTRY
·
2016
·
IF 1.756
Lei Qi,Qian Li,Xiao Hong,Li Liu,Xin-Xin Zhong,Qiao Chen,Fa-Bao Li,Qian Liu,Hai-Mei Qin,Wai-Yeung Wong
Highly emissive three-coordinate copper halide complexes with a bidentate phosphine ligand have attracted attention. Here, a series of three-coordinate mono- and dinuclear copper halide complexes, [CuI(dpbp)2] (1) and [CuX(dpbp)]2 (dpbp = 2-(diphenylphosphino)biphenyl, X = Br (2), Cl (3)), were synthesized, and their molecular structures and photophysical properties were investigated. In the solid state, these complexes exhibit green photoluminescence with microsecond lifetimes (λmax = 515–538 nm; τ = 11.8–19.1 μs) at 298 K. The emission of the complexes originates from the (σ + X) → π* transition. All three complexes displayed good thermal stability.
研究领域:
无机化学
·
材料科学
·
光物理
·
配位化学
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高影响因子
Environmental Science-Nano
·
2026
·
IF 5.1
Fengyang Jing,Shimeng Chang,Xingyu Zhang,Chen-Liang Zhou,Yao Weng,Xuewei Li,Hongmei Ye,Yuting Sun,Jiuyang Lin,Wenyuan Ye,Wenjing Yuan
In this study, double S-scheme heterojunctions were constructed by a simple hydrothermal and calcination method, accompanied by the special layered structure of BiOIO3 employed for its I- modification. This resulted in the formation of CeO2/[Bi6O6(OH)3](NO3)3·1.5H2O (BHN)/I--BiOIO3, which possesses double S-scheme heterojunctions. The improvement of photocatalytic degradation efficiency is derived from the result of the synergistic effect of double S-scheme heterojunctions and I- modification. In photocatalytic degradation experiment with norfloxacin as the target pollutant, the degradation efficiency of typical sample (CeO2/BHN/I--BiOIO3-2) reaches 97.50%, which is 9 times and 1.6 times than that of pure CeO2 and BHN/BiOIO3, respectively. Obviously, the CeO2/BHN/I--BiOIO3 double S-scheme heterojunctions significantly enhances its photocatalytic degradation ability of antibiotics in comparison to single-substance photocatalysts and simple two-phase composite. It is noteworthy that the CeO2/BHN/I--BiOIO3 double S-scheme heterojunctions are also capable of achieving a degradation rate of up to 70% for norfloxacin in river water. Furthermore, this double S-scheme heterojunctions demonstrate the degradation efficiencies of approximately 90% for quinolone antibiotics, including ofloxacin, enrofloxacin, ciprofloxacin, and norfloxacin. This research offers a novel approach to enhance the photocatalytic degradation of organic pollutants through double S-scheme heterojunctions and elemental modification.
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JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
·
2025
·
IF 2.7
Yun Li,Ruijin Pu,Meng Su,Ruiqin Mao,Yajun Zheng,Zhiping Zhang
Methimazole (MMI), which is primarily known as an antithyroid drug, has received considerable attention for its potent antioxidant properties in a copper(I)-mediated Fenton reaction. However, the antioxidant mechanistic details of MMI, particularly its structural analogy to the natural antioxidant ergothioneine (both of which feature an imidazole-2-thione moiety), remain largely unexplored due to the difficulty of in situ characterizing unstable reaction intermediates. In this study, we combined an in situ reactor-integrated paper-in-tip spray ionization source with mass spectrometry (PTSI-MS) to probe the protection mechanisms of MMI against the CuI-catalyzed Fenton reaction online. We present direct MS evidence of the antioxidant mechanisms of MMI (M) in its reduced form (MSH) and oxidized disulfide form (MSSM). The former can directly sequester H2O2 (i.e., a H2O2 scavenging mechanism). The latter tightly coordinates with CuI to form a CuI-MSSM complex that stabilizes CuI and prevents its oxidation by H2O2 and thus the formation of •OH (i.e., a metal ion coordination mechanism). The proposed reaction pathway of the CuI complexes from MMI disulfide (CuI-MSSM, m/z = 289 and 291) to MMI thiosulfonate (CuI-MSO2SM, m/z = 321 and 323) to MMI monosulfide (CuI-MSM, m/z 257 and 259) was verified by S–S oxidation, SO2–S bond cleavage, and extruded sulfur elimination, which confirmed the stable N,N′-bidentate binding of CuI to these intermediates, even when attacked by H2O2. These findings challenge the traditional radical scavenging mechanism and contribute to our understanding of the relationship between the structure and antioxidant activity of imidazole-2-thiones. Furthermore, the established in situ reactor-integrated PTSI-MS approach provides unique insights into reaction dynamics, offering the advantages of simplicity, speed, and low reaction volume (down to 20 μL).
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PubMed
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Qi Deng,Fangzhong Liu,Xiongwei Wu,Changzhu Li,Weibin Zhou,Bei Long
The development of aqueous battery with dual mechanisms is now arousing more and more interest. The dual mechanisms of Zn 2+ (de)intercalation and I − /I 2 redox bring unexpected effects. Herein, differing from previous studies using ZnI 2 additive, this work designs an aqueous BiI 3 -Zn battery with self-supplied I − . Ex situ tests reveal the conversion of BiI 3 into Bi (discharge) and BiOI (charge) at the 1st cycle and the dissolved I − in electrolyte. The active I − species enhances the specific capacity and discharge medium voltage of electrode as well as improves the generation of Zn dendrite and by-product. Furthermore, the porous hard carbon is introduced to enhance the electronic/ionic conductivity and adsorb iodine species, proven by experimental and theoretical studies. Accordingly, the well-designed BiI 3 -Zn battery delivers a high reversible capacity of 182 mA h g −1 at 0.2 A g −1 , an excellent rate capability with 88 mA h g −1 at 10 A g −1 , and an impressive cyclability with 63% capacity retention over 20 K cycles at 10 A g −1 . An excellent electrochemical performance is obtained even at a high mass loading of 6 mg cm −2 . Moreover, a flexible quasi-solid-state BiI 3 -Zn battery exhibits satisfactory battery performances. This work provides a new idea for designing high-performance aqueous battery with dual mechanisms.
研究领域:
电化学
·
能源材料
·
储能技术
·
无机化学
·
纳米材料
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JOURNAL OF PHYSICAL CHEMISTRY A
·
2010
·
IF 2.899
Shengtong Sun,Peiyi Wu
A designed ligand-accelerated Cu(I)-catalyzed cycloaddition (CuAAC) reaction was monitored for the first time by real time infrared analysis technique based on ATR-FTIR principles. Principal components analysis (PCA) and two-dimensional correlation spectroscopy (2Dcos) results showed that the consumption of alkyne and azide took place successively followed by the formation of the product 1,2,3-triazole, and a 1:1 complex of two reactants would be formed in the reaction process. The rate-determining step of the CuAAC reaction was also experimentally confirmed for the first time to be the transition of azide−alkyne 1:1 complex to the preproduct 1,2,3-triazole. Our results are in good conformity with the current catalytic mechanism proposed by Sharpless et al. according to DFT calculation results.
研究领域:
有机化学
·
催化化学
·
光谱学
·
化学反应机理
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JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.8
Hongwei Xu,Yang Chen,Leilei Kuai,Chengjun Liu,Jianjun Zhao,Quan Liu,Bo Wei,Junpeng Xue,Zutao Fan
Metal halide perovskite nanocrystals (PNCs), particularly all-inorganic CsPbX 3 (X = Cl, Br, I), exhibit exceptional optoelectronic properties, positioning them as revolutionary materials for LEDs, displays, and photodetectors. However, their commercialization is impeded by environmental instability under moisture, heat, and light. To address this, we introduce a solvent-induced surface rheological engineering (SISRE) strategy to fabricate super-hydrophobic CsPbX 3 -PS composite membranes inspired by the lotus leaf effect. Key innovation lies in controlled spraying of a THF/ethanol mixture (3:1 v/v) onto the membrane surface. THF selectively dissolves surface PS to induce micro/nano hierarchical roughness, while ethanol triggers rapid polymer re-solidification. By modulating spray passes (5–15 cycles), we achieved tunable hydrophobicity with contact angles increasing from 70° to >140° (Cassie-Baxter state), while maintaining PLQY∼72% for CsPbBr 3 PNCs membrane. The optimized super-hydrophobic membrane (12 spray cycles) nearly exhibited a 2.7-fold enhancement in water stability (PLQY decay rate: 1.65%/day vs. 4.46%/day for untreated films). In addition, when applied as a down-conversion layer on blue LEDs (λ peak = 452 nm), the device achieved 111% NTSC color gamut coverage (98% Rec.2020) with CIE coordinates (0.328, 0.288) and CCT = 5722 K. This work provides a scalable, appliable route to concurrently enhance environmental stability and optoelectronic performance of PNCs.
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