ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 18
·2010603
·
IF 18.808
Chao Liu,Shuang Liu,Yifan Wang,Yanmeng Chu,Kai Yang,Xiadong Wang,Chenxu Gao,Qifei Wang,Jiankang Du,Sheng Li,Yue Hu,Yaoguang Rong,Lianbo Guo,Anyi Mei,Hongwei Han
Additives are widely adopted for efficient perovskite solar cells (PSCs), and proper additive design contributes a lot to PSCs’ various breakthroughs. Herein, a novel additive of N ,1-fluoroformamidinium iodide (F-FAI), whose cation replaces one amino group in guanidinium (GA + ) with electron-withdrawing fluorine group, is synthesized and applied as the additive for PSCs. The electron-withdrawing effect of fluorine promotes the molecular polarity of N ,1-fluoroformamidine (F-FA), enhancing the interaction of N ,1-fluoroformamidinium (F-FA + ) with MAPbI 3 . Compared with the nonpolar GA + , F-FA + improves the crystallinity, passivates the defect, and downshifts the Fermi level of MAPbI 3 more significantly. The charge transfer and built-in field in printable triple mesoscopic PSCs are therefore enhanced. Moreover, charge transport in MAPbI 3 is also promoted by F-FAI. With these benefits, a power conversion efficiency of 17.01% for printable triple mesoscopic PSCs with improved open-circuit voltage and fill factor is obtained with the addition of F-FAI, superior to the efficiency of 15.24% for those devices with guanidinium iodide additives.
研究领域:
材料科学
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能源技术
·
化学工程
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DOI
高影响因子
Advanced Optical Materials
·
2026
·Vol. 14
·期 17
·e71226
·
IF 7.2
Jinwei Liu,Jiaxin Li,Guojun Zheng,Chuan Liao,Jianhong Wu,Jianrong Qiu,Wenge Xiao
Cr 3+ emission can well cover the NIR-I region (700–950 nm), while Ni 2+ emission typically extends across the NIR-II region (1000–1700 nm), making the Cr 3+ –Ni 2+ co-doped phosphors among the most promising ultrabroadband NIR emitters for phosphor-converted light-emitting diodes (pc-LEDs). However, a pronounced gap or even spectral discontinuity between the two emission bands results in a severely imbalanced photon flux across the spectrum, thereby degrading multicomponent spectral detection accuracy and significantly limiting the practical applications of such NIR pc-LED devices. Here, we report a superstoichiometric spinel MgO· n Ga 2 O 3 :Cr 3+ ,Ni 2+ ( n > 1) phosphor, in which the excess Ga 2 O 3 increases the degree of cation inversion to achieve a long-wavelength Cr 3+ emission at 895 nm, substantially elevating the spectral gap height to a state-of-the-art value of ≈36%. Moreover, efficient energy transfer from Cr 3+ to Ni 2+ enables the optimized MgO·1.2Ga 2 O 3 :Cr 3+ ,Ni 2+ phosphor to demonstrate a high internal quantum efficiency of 97% and excellent thermal stability. Finally, the as-fabricated NIR pc-LED delivers an exceptional photoelectric efficiency of 21% at 20 mA and a maximum NIR output power of 62 mW at 350 mA. This work establishes a new pathway toward next-generation compact ultrabroadband NIR pc-LEDs featuring unprecedented spectral flatness and superior optoelectronic performance.
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高影响因子
PROCEEDINGS OF THE COMBUSTION INSTITUTE
·
2024
·
IF 5.3
Qilong Fang,Jun Fang,Yi Zhang,Jianguo Zhang,Tianyou Lian,Wei Li,Yuyang Li
Oxymethylene ethers (OMEs) have received great attention due to their carbon-neutral nature and advantageous properties as alternative transportation fuels or fuel additives. Previous studies focused on the combustion of linear OMEs with the chemical formula of CH 3 O(CH 2 O) m CH 3 ( m ≥ 0), while a deep understanding of the combustion of branched OMEs with the chemical formula of CH 3 OCH 3- n (OCH 3 ) n (0 ≤ n ≤ 3) is still absent. In this work, the flow reactor pyrolysis of dimethoxymethane (DMM, n = 1), trimethoxymethane (TMM, n = 2), and tetramethoxymethane (TeMM, n = 3) is investigated using gas chromatography, with special attention given to the multi-sidechain effects on the pyrolysis chemistry. A pyrolysis model of branched OMEs is developed and validated against the new pyrolysis data. Modeling analysis is performed to provide insights into the pyrolysis chemistry of the three branched OMEs and the multi-sidechain effects. Unimolecular decomposition and H-abstraction reactions are found to be two major types of fuel decomposition pathways, with the former dominating TMM decomposition, the latter dominating DMM decomposition, and both contributing almost equally to TeMM decomposition. Sensitivity analysis shows that C O bond dissociation is the most sensitive reaction to fuel decomposition in DMM pyrolysis, while methanol elimination is the most sensitive reaction in TMM and TeMM pyrolysis. Among the three fuels, DMM has the lowest pyrolysis reactivity and produces the least abundant methanol. In contrast, TMM is observed with the highest pyrolysis reactivity and produces the most abundant methanol. Theoretical calculations reveal that TMM and DMM have the lowest and highest energy barriers of methanol elimination reactions, which determines the order of their pyrolysis reactivities and methanol formation trends. As a result, DMM pyrolysis occurs at higher temperature regions where the C O bond dissociation and H-abstraction reactions are preferred, while TMM pyrolysis occurs at lower temperature region where methanol elimination dominates.
研究领域:
能源科学
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化学工程
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DOI
高影响因子
Frontiers in Nutrition
·
2022
·
IF 6.59
Qi Zhang,Zhen-Hua Wu,Shan-Shan Zhao,Jing Yang,Lei Chen,Xiao-Yu Wang,Zhan-You Wang,Hui-Xin Liu
Changes in overall bile acid (BA) levels and specific BA metabolites are involved in metabolic diseases, gastrointestinal, and liver cancer. BAs have become established as important signaling molecules that enable fine-tuned inter-tissue communication within the enterohepatic circulation. The liver, BAs site of production, displayed physiological and functional zonal differences in the periportal zone versus the centrilobular zone. In addition, BA metabolism shows regional differences in the intestinal tract. However, there is no available method to detect the spatial distribution and molecular profiling of BAs within the enterohepatic circulation. Herein, we demonstrated the application in mass spectrometry imaging (MSI) with a high spatial resolution (3 μm) plus mass accuracy matrix-assisted laser desorption ionization (MALDI) to imaging BAs and N -1-naphthylphthalamic acid (NPA). Our results could clearly determine the zonation patterns and regional difference characteristics of BAs on mouse liver, ileum, and colon tissue sections, and the relative content of BAs based on NPA could also be ascertained. In conclusion, our method promoted the accessibility of spatial localization and quantitative study of BAs on gastrointestinal tissue sections and demonstrated that MALDI-MSI was a valuable tool to investigate and locate several BA molecules in different tissue types leading to a better understanding of the role of BAs behind the gastrointestinal diseases.
研究领域:
生物化学
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代谢组学
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成像技术
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分子生物学
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病理学
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产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Renjie Zhou,Cheng Yang,Ting Xie,Jian Zhang,Chenqiang Wang,Ziqiang Ma,Lianfu Zhang
Amadori compounds (ACs) are the first stable product formed in the initial stage of the Maillard reaction and are widely present in processed foods. In addition to being widely known as the flavor precursors, ACs have attracted attention in recent years because many functions have been revealed, including ACE inhibition. In this work, we synthesized four ACs ( N -(1-Deoxy-D-fructos-1-yl)-glycine (Fru-Gly), N -(1-Deoxy-D-fructos-1-yl)-proline (Fru-Pro), N -(1-Deoxy-D-fructos-1-yl)-serine (Fru-Ser) and N -(1-Deoxy-D-fructos-1-yl)-threonine (Fru-Thr)) and characterized them using UPLC-Q-TOF-MS spectra. The four ACs’ angiotensin-converting enzyme (ACE) inhibitory activities were verified for the first time, the IC 50 value range was 1.447–4.204 mmol/L, the Fru-Gly has the best effect. And all the four ACs showed good digestion stability, the content remained above 70% after 5 h of continuous digestion simulation. In order to reveal the mechanism of ACs inhibiting ACE, we selected Fru-Gly, beacuse of the best inhibitory effect, to carried out enzyme kinetics, circular dichroism spectroscopy, fluorescence spectroscopy, thermodynamics and molecular docking analysis. The results showed that Fru-Gly was a noncompetitive inhibitor, it spontaneously binds to the inactive site of ACE by hydrogen bond and causes the conformation change of ACE to inactivate it. The reaction is easier to proceed at low temperatures.
研究领域:
食品科学
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生物化学
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2016
·Vol. 4
·期 2
·281-288
·
IF 4.532
Miriding Mutailipu,Xin Su,Min Zhang,Zhihua Yang,Shilie Pan
Two new members of zincoborate fluoride series Ban+2Znn(BO3)n(B2O5)Fn (n = 1, 2), namely, Ba3Zn(BO3)(B2O5)F and Ba4Zn2(BO3)2(B2O5)F2 were firstly synthesized as high-quality single crystals via a high-temperature solution method by adjusting the molar ratios of reactants. They were structurally determined by single-crystal X-ray diffraction and their structures can be regarded as three dimensional (3D) framework stacking of 2∞[Zn2B6O16]10− layers for Ba3Zn(BO3)(B2O5)F and 2∞[Zn2B4O8O5/2O1/3]17/3− layers for Ba4Zn2(BO3)2(B2O5)F2. To the best of our knowledge, the two title compounds are the first examples of two kinds of isolated B–O groups that coexist in one zincoborate halide. The structure comparisons were carried out among all the available anhydrous-zincoborates, and it is interesting to conclude that about 80% of zincoborates contain isolated B–O clusters and notably the molar ratio of cation/boron (A/B) affects the polymerization of isolated B–O configuration. What's more, the first-principles calculations, infrared spectra, and UV-vis-NIR diffuse reflectance spectra of title compounds have also been performed.
研究领域:
无机化学
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材料科学
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晶体学
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固态化学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Ziyan Wang,Heping Cui,Mengyu Ma,Khizar Hayat,Xiaoming Zhang,Chi-Tang Ho
The effect of ellagic acid on the formation of pyrazine, methylpyrazine, 2,3-methylpyrazine, 2,6-methylpyrazine, 2,5-methylpyrazine, and trimethylpyrazine in the xylose–glycine Maillard reaction model was researched. Ellagic acid could either inhibit or promote pyrazine formation, depending on its addition time point and the pH of the system. The addition of ellagic acid during the accumulation period of an Amadori compound inhibited pyrazine formation by capturing the Amadori compound in the xylose–glycine Maillard system and decreasing the pyrazine precursors. The inhibitory effect of ellagic acid on pyrazine formation got more obvious with an increase in the pH of the system. However, when ellagic acid was added at the beginning of the xylose and glycine Maillard system and when the oxidizing substances such as glyoxal and methylglyoxal were significantly formed in the Maillard system, its oxidation could promote the formation of pyrazines.
研究领域:
食品化学
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有机化学
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美拉德反应
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2014
·
IF 3.107
Jian Xiao,Qiang Zhang,Yu-Qi Gao,Jiang-Jiang Tang,An-Ling Zhang,Jin-Ming Gao
Two new metabolites, an α-pyridone derivative, 3-hydroxy-2-methoxy-5-methylpyridin-2(1H)-one (1), and a ceramide derivative, 3-hydroxy-N-(1-hydroxy-3-methylpentan-2-yl)-5-oxohexanamide (2), and a new natural product, 3-hydroxy-N-(1-hydroxy-4-methylpentan-2-yl)-5-oxohexanamide (3), along with 15 known compounds including chaetoglobosin C (7) and chaetoglobosin F (8) were isolated from the solid culture of the endophytic fungus Botryosphaeria dothidea KJ-1, collected from the stems of white cedar (Melia azedarach L). The structures were elucidated on the basis of spectroscopic analysis (1D and 2D NMR experiments and by mass spectrometric measurements), and the structure of 1 was confirmed by X-ray single-crystal diffraction. These metabolites were evaluated in vitro for antimicrobial, antioxidant, and cytotoxicity activities. Pycnophorin (4) significantly inhibited the growth of Bacillus subtilis and Staphyloccocus aureus with equal minimum inhibitory concentration (MIC) values of 25 μM. Stemphyperylenol (5) displayed a potent antifungal activity against the plant pathogen Alternaria solani with MIC of 1.57 μM comparable to the commonly used fungicide carbendazim. Both altenusin (9) and djalonensone (10) showed markedly DPPH radical scavenging activities. In addition, stemphyperylenol (5) and altenuene (6) exhibited strong cytotoxicity against HCT116 cancer cell line with a median inhibitory concentration (IC50) value of 3.13 μM in comparison with the positive control etoposide (IC50 = 2.13 μM). This is the first report of the isolation of these compounds from the endophytic B. dothidea.
研究领域:
药理学
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微生物学
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生物化学
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有机化学
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植物科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Junling Meng,Wan Huang,Meijing Lu,Jingxuan Cao,Na Xu,Lina Zhao
In recent years, the in-situ exsolution of metal nanoparticles from the anodic oxide framework through reduction treatment has emerged as an effective strategy to boost electrochemical performance by increasing active sites and facilitating charge transfer. However, this approach is primarily restricted to simple perovskite structures. The development of novel and more efficient oxide matrices for the controlled desorption of high-density metal catalysts remains a significant challenge. In this study, Ruddlesden-Popper (RP) type layered oxides Pr 2 NiO 4 and Pr 3 Ni 2 O 7 were innovatively employed as new primary matrices with the objective of achieving controllable exsolution of nickel metal nanoparticles by leveraging their unique layered architecture. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses confirmed that following reduction treatment, Ni nanoparticles were successfully exsolved in situ from the oxide surface, with a notably higher density of Ni nanoparticles observed for Pr 3 Ni 2 O 7 . Electrochemical tests show that after 3 h of reduction at 850 °C, the cell with Pr 3 Ni 2 O 7 anode can achieve a peak power density of 969.7 mW cm −2 . Furthermore, when employed the studied compounds as anode materials, they showed negligible performance degradation after 100-h operation at 700 °C under 300 mA cm −2 current density. Furthermore, SEM characterization provided additional verification of the experimental results. This research not only underscores the considerable potential of RP phase oxides as high-performance SOFC anode materials but also offers new insights into future developments in SOFC anodes by adjusting RP phase sequences to regulate nanoparticle density effectively.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Tong Zhou,Xue Xia,Heping Cui,Yun Zhai,Foxin Zhang,Khizar Hayat,Xiaoming Zhang,Chi-Tang Ho
The influence of pH was studied on volatile flavor formation during thermal treatment of an Amadori rearrangement product (ARP) with or without the addition of cysteine (Cys). The formation of thiols and sulfides or 2-acetylthiazole and pyrazines induced by Cys during thermal degradation of ARP was pH-dependent. At low pH levels, the hydrolysis of Cys to hydrogen sulfide (H2S) was promoted, giving rise to the increase of thiols and sulfides with an obvious meaty aroma. However, alkaline conditions were beneficial for enhancing the cyclization or transformation of imine to the enol structure, which strengthened the formation of 2-acetylthiazole and pyrazines with a roasted and nutty aroma. The imine was derived from the nucleophilic addition of Cys and methylglyoxal (MGO) and subsequent decarboxylation. At pH 8, Cys-induced variation of the flavor profile was weakened during thermal degradation of ARP. Accordingly, the combinational effect of pH and added Cys could be beneficial for achieving the desirable flavors during thermal processing of ARP.
研究领域:
食品科学
·
化学
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产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 12
·2203016
·
IF 9
He Wang,Xi Zhang,Yali Ma,Mengke Wang,Jun Wang
Flexible optoelectronic devices have attracted enormous attention as an essential component in next-generation wearable devices. To meet the trend of biocompatibility, flexibility and low cost, paper-based optoelectronic devices have become compelling candidates. Moreover, 2D organic–inorganic metal halide perovskites have been extensively studied for the application in flexible optoelectronic devices owing to their long-term moisture stability, optoelectronic tunability, and multiple quantum well (MQW) structures. Herein, the paper-based flexible optoelectronic devices are designed by spin-coating PEDOT:PSS and (iso-BA) 2 MA n -1 Pb n I 3 n +1 ( n ≥ 1) on regular filter paper with responsivity of 2.62 mA W −1 and response time (τ rise /τ decay ) of 0.81/0.18 s at 35% relative humidity (RH). Furthermore, the responsivity may be increased by 250% within the humidity range from 35% to 90%, and remains above 92% of the initial value after measured for 1800 s at 60% RH. This work can pave the way for further studies about the humidity effect on perovskites for next-generation green wearable electronics.
研究领域:
材料科学
·
光电技术
·
纳米技术
·
可穿戴技术
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Renjie Zhou,Jiahao Yu,Shuo Li,Jian Zhang,Chenqiang Wang,Lianfu Zhang
Amadori compounds (ACs; N-(1-deoxy-d-fructos-1-yl)-amino acid) are superior flavor precursors and potential functional ingredients in food processing. In this study, vacuum dehydration as an excellent and universal method for the formation of ACs in both simulation systems and food processing was revealed. In total, 12 amino acids referring to all six categories were selected to conduct simulated reactions with glucose in aqueous models. At 90 °C, yields of 11 ACs were significantly increased by vacuum dehydration, reaching 4–198 times compared to a heat sealing reaction in aqueous systems, and formation of 5-hydroxymethyl-2-furaldehyde (5-HMF) and browning were slower than that by a dry powder reaction. In particular, the yields of Fru-Arg, Fru-His, and Fru-Glu reached 87.03, 90.73, and 89.88 mol %, respectively. The order of promotion effect was acid ACs > basic ACs > unique ACs > polar neutral ACs > aliphatic ACs > aromatic ACs. The excellent effect was mainly attributed to the control of water activity (Aw) and pH, which enabled the models to reach the optimal reaction state quickly by adjusting the vacuum degree at mild temperatures. The method was also applied to AC enrichment in tomato sauce processing; the AC content could rise to 30.72 mg/g, which was more than 17 times than those in samples without vacuum dehydration and two commercial tomato sauces.
研究领域:
食品科学
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）