JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Sai-Li Zheng,Yonghe He,Xiao-Kang Qiu,Yuan-Hui Zhong,Lai-Hon Chung,Wei-Ming Liao,Jun He
A novel metal-organic framework [CuCN(TMBP)·H 2 O] n ( TCuCN ) has been synthesized by the reaction of 3,3′,5,5′-tetramethyl-4,4′-bipyrazole (TMBP) and CuCN. Its structure was determined by single-crystal X-ray diffraction (SCXRD) analysis and further characterized by power X-ray diffraction (PXRD) analysis, FT-IR spectroscopy and thermogravimetric (TG) analysis. Previously reported structurally analogous TCuCl , TCuBr , TCuI have also been synthesized for Br 2 adsorption comparison. All of these four MOFs exhibited reversible uptake of Br 2 vapor judging by the unchanged PXRD patterns . Among four MOFs, Br 2 -loaded TCuI showed the most uptake amount of Br 2 (15.7 wt%), providing the formula to be TCuI ·0.33Br 2 . The different uptake amount of Br 2 for TCuX (X = CN, Cl, Br, I) should be mainly ascribed to the intermolecular interaction between CuX and Br 2 .
研究领域:
无机化学
·
材料化学
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配位化学
·
多孔材料
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气体吸附
✓ 已验证
DOI
高影响因子
Biochar
·
2023
·Vol. 5
·期 1
·1-16
·
IF 12.7
Liu Fenglei,Wang Shanshan,Zhao Chaofeng,Hu Baowei
Herein, a biochar-based composite (Ti 3 C 2 T x @biochar-PDA/PEI) was constructed by decorating Ti 3 C 2 T x and polydopamine on coconut shell biochar via electrostatic self-assembly method. Different characterization techniques were applied to explore the structure, morphology and composition of the sorbents. It was found that the higher porosity and diverse functional groups were conducive for Ti 3 C 2 T x @biochar-PDA/PEI to capture radionuclides, and the water environmental conditions made a great contribution to the adsorption process. The process of removing U(VI)/Cs(I) well complied with the Langmuir isotherm and Pseudo-second-order equations, which indicated that the single layer chemical adsorption occurred on the solid liquid interface. Meanwhile, this produced composite exhibited superior removal performance under complex co-existing ion environment, and the maximum adsorption amounts of U(VI) and Cs(I) reached up to 239.7 and 40.3 mg g −1 . Impressively, this adsorbent still exhibited good adsorption performance after three cycles of regeneration. The spectral analysis and DFT calculation demonstrated that adsorption of U(VI) might be a chemical process, while the adsorption of Cs(I) should be ion exchange or electrostatic attraction. This study demonstrated the potential application of Ti 3 C 2 T x @biochar-PDA/PEI as an effective remediation strategy for radioactive wastewater cleanup. Graphical Abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 16
·2200724
·
IF 10.05
Jun-Hua Wei,Yong-Wei Yu,Jian-Bin Luo,Zhi-Zhong Zhang,Dai-Bin Kuang
Anti-counterfeiting has become a serious issue around the global world; fluorescence-based tags are praised for the low-cost and facile decryption process. However, the high-level anti-counterfeiting application requires incorporating multifunctional luminescent materials with response to different excitation sources. Herein, a dimeric Cu(I)-halide-clusters-assembled single-crystal (AEP) 2 Cu 2 I 6 ·2I·2H 2 O (AEP = N -aminoethylpiperazinium) concerning a high down-conversion photoluminescence quantum yield (PLQY) value of near unity is reported (λ ex = 305 nm), which can also be activated by the near-infrared light and X-ray. The ultrafast spectroscopy and density functional theory calculations reveal that the broad-band emission originates from the recombination of self-trapped excitons. Remarkably, the high PLQY and excellent attenuation capability for X-ray confers an outstanding light yield of 55 650 photons MeV −1 to (AEP) 2 Cu 2 I 6 ·2I·2H 2 O, which is 5.25 times higher than the standard bismuth germaniumoxide scintillator. Such multi-light-stimulus response endows (AEP) 2 Cu 2 I 6 ·2I·2H 2 O with great application potential in anti-counterfeiting, solid-state lighting devices, and digital radiography.
研究领域:
材料科学
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光学
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物理学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Dan Li,Peipei Zhou,Yufei Hu,Gongke Li,Ling Xia
Triphenylamine functionalized polyhedral oligomeric silsesquioxane (POSS@TPA) was prepared using the Friedel-Crafts reaction with tris(4-bromophenyl)amine (TPA) as the functional monomer and polyhedral oligomeric silsesquioxane (POSS) as the framework. The as-prepared POSS@TPA has a stable structure and accomplished pore performance, allowing for the selective adsorption of Sudan I and result in the fluorescence quenches of POSS@TPA. Thus, the POSS@TPA could be used as sensors to fluorescence detect 0.12–7.4 mg/L Sudan I, with a detection limit of 0.091 mg/L. Moreover, the POSS@TPA have good reuseability can be reused more than 5 cycles after washing. Noteworthily, the response time of POSS@TPA for determination was as short as 1 min. Furthermore, the sensor was effectively used to determine Sudan I in cakes with excellent recoveries (86.4–108.8 %) and relative standard deviations (2.5–4.9 %). The results matched those of high-performance liquid chromatography (HPLC). Our work shows great potential in terms of the rapid detection of food safety.
研究领域:
食品安全
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分析化学
✓ 已验证
DOI
高影响因子
Journal of Food Measurement and Characterization
·
2023
·Vol. 18
·期 1
·95-104
·
IF 3.4
Sun Xi,Liu Feng,Xue Xiao
Ensuring food safety necessitates rapid and reliable food contaminant detection methods. Here, we present a novel approach that integrates electrochemical sensors with machine learning to detect Sudan Red I in food. Our study showcases a modified stainless steel needle (SSN) electrode adorned with silver nanoparticles (AgNPs) and investigates three distinct convolutional neural network (CNN) architectures: Inception V1, ResNet-50, and SqueezeNet V1.1. This combination aims to predict the sensor response accurately. The AgNPs/SSN electrode displays heightened electrochemical activity towards Sudan Red I, offering a linear detection range of 0.1–20 μM and an exceptional 10 nM detection limit. Notably, the Inception V1 and ResNet-50 networks exhibit superior predictive capability compared to SqueezeNet V1.1. Our interdisciplinary approach establishes a rapid, sensitive, and dependable detection system for food contaminants. By fusing electrochemical sensors with machine learning, we propel the development of intelligent detection systems with significant implications for food safety enhancement. Graphical abstract
研究领域:
食品科学
·
分析化学
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人工智能
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DOI
高影响因子
Nano Research
·
2023
·Vol. 17
·期 5
·4437-4443
·
IF 9.9
Zhong Junsen,Huang Bingkun,Yang Kunjie,Ma Zuju,Du Lingyu,Luo Ning,Tang Fengjiao,Hou Chuanxin,Jiang Fuyi,Kang Litao
The electrochromic (EC) mechanisms of inorganic materials are usually based on reversible cation insertion/extraction or metal deposition/dissolution, which are plagued by ion trapping and dendrite growth, respectively. In this paper, a novel conversion-type electrochromic mechanism is proposed, by making good use of the CuI/Cu redox couple. This CuI-based electrochromic system shows a neutral color switching from transparent and dim grey. By simply increasing the bleaching voltage, \({{\rm{I}}_3}^ - /{{\rm{I}}^ - }\) redox couple can be further activated. The generated \({{\rm{I}}_3}^ - \) will readily react with Cu, effectively improving the conversion reversibility and thereby rejuvenating the degraded electrochromic performance. Thanks to the well-designed electrode and the self-healing ability, this conversion electrochromic system achieves rapid response times ( t coloring : 23 s, t bleaching : 6 s), decant optical modulation amplitude (26.4%), high coloration efficiency (86.15 cm 2 ·C −1 ), admirable cyclic durability (without performance degradation after 480 cycles) and excellent optical memory ability (transmittance variation < 1% after 10 h open-circuit storage). The establishment of this conversion-type electrochromism may inspire the exploration of novel electrochromic materials and devices.
研究领域:
材料科学
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电化学
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纳米技术
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智能材料
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能量存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2024
·
IF 3.3
Lizhu Zhang,Wenqian Du,Jiawen Wu,Rongjie Yang,Fen Zhao,Baomin Fan,Zhonghua Xia
A gold-catalyzed sulfonylation of aryl/vinyl iodides to synthesize aryl sulfones facilitated by the ligand-enabled Au(I)/Au(III) redox catalysis was developed. In the reaction, aryl sodium sulfinates or sulphinic acids can react smoothly with aryl/vinyl iodides to directly construct various aryl sulfones. The strong synthetic capabilities of sulfone synthesis are demonstrated by its easily available and handled reagents, good functional group compatibility, and late-stage application of complicated biomolecules. Mechanistic studies suggest that the silver salt plays a crucial role in the transmetalation with the Au(I)/Au(III) intermediate, and the gold complex favors Au–S bond formation over Au–O bond formation.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2019
·
IF 4.914
Zhi-Hua Zhou,Xiao Zhang,Yong-Fu Huang,Kai-Hong Chen,Liang-Nian He
Inexpensive and efficient Cu(I) catalysis is reported for the synthesis of α-hydroxy ketones from propargylic alcohols, CO 2 , and water via tandem carboxylative cyclization and nucleophilic addition reaction. Notably, hydration of propargylic alcohols can be carried out smoothly under atmospheric CO 2 pressure, generating a series of α-hydroxy ketones efficiently and selectively. This strategy shows great potential for the preparation of valuable α-hydroxy ketones by using CO 2 as a crucial cocatalyst under mild conditions.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Sai-Nan Qin,Yun-Chuan Nong,Chuan-Liang Cao,Li-Yang Chen,Yi-Jie Cao,Ting Wan,Lei Feng,Kalle Salminen,Jian-Jun Sun,Ju Li
Acute myocardial infarction (AMI) is one of the top contributors to global disease mortality. AMI biomarkers, such as cardiac troponin I (cTnI), are often detected with enzyme-linked immunosorbent assay (ELISA) that suffers from several well-known drawbacks such as poor stability and slow and cumbersome operation. Therefore, it is necessary to develop a new analytical technique that can rapidly analyse and detect cTnI for early screening of AMI. In this work, a nanoporous electrochemical aptamer-based (E-AB) sensor for rapid and sensitivite detect of cTnI was designed. Firstly, the aptamer was truncated, and then molecular docking simulation and circular dichroism (CD) were used to screen for aptamers with significant conformational changes when binding to the target, in order to enhance the sensitivity of E-AB sensors. Subsequently, nanoporous electrodes with active area 20 times higher than that of smooth electrodes were fabricated by electrochemical alloying/dealloying, which enabled E-AB sensors to obtain higher signal-to-noise ratios, providing favorable assurance for the detection results. Under optimal conditions, E-AB sensors could specifically detect cTnI in serum and blood with a detection limit of 1 pg/mL. At the same time, the sensor and enzyme-linked immunoassay (ELISA) had identical detection results when measuring target levels from real clinical samples. Furthermore, the sensor exhibited good reproducibility, stability, providing a simple and low-cost method for detecting cTnI, which is expected to help early AMI patients obtain accurate diagnosis.
研究领域:
医学诊断
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生物传感
·
心血管疾病研究
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2013
·Vol. 21
·期 1
·1-13
·
IF 2.019
Li Xing-Jian,Sun Dao-Xing,Zhang Yi-Heng
The Cu(I)-mediated azide–alkyne cycloaddition reaction, “click” chemistry, has been used to functionalize the waterborne polyurethane, by which a novel fluorinated waterborne polyurethane (FWPU) was synthesized. FWPU was confirmed by FT-IR and 1 H NMR. The structure and properties of FWPU were characterized by water contact angle, water absorption, surface energy, scanning electron microscope (SEM) equipped with energy dispersive X-ray spectrometry (EDS), thermogravimetric analysis (TGA) and X-ray diffraction (XRD), etc. From the research of the surface properties, it was found that the modified materials were endowed with a remarkable hydrophobicity and stain resistance. SEM results showed that the micro-phase separation of FWPU became increasingly apparent with the rise of fluorinated side chains in polyurethane backbone. XRD measurements reflected that the crystallinity of FWPU tended to decrease firstly and then increase with the change of fluorine content. TGA results demonstrated that FWPU possessed flame retardant performance to a certain extent due to the incorporated alkyne groups in the FWPU to improve the final char strongly.
研究领域:
高分子化学
·
材料科学
·
表面工程
·
有机化学
·
应用化学
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2021
·
IF 3.721
Ting-Hong Huang,Cheng Luo,Dan Zheng
Cationic and neutral mononuclear Cu(I) complexes, [Cu(PPh 3 ) 2 (PmH)]BF 4 (1a), [Cu(DPEphos) (PmH)]BF 4 (2a), [Cu(Xantphos) (PmH)]BF 4 (3a), [Cu(PPh 3 ) 2 (Pm)] (1b), [Cu(DPEphos) (Pm)] (2b) and [Cu(Xantphos) (Pm)] (3b) (PPh 3 = triphenylphosphine , DPEphos = bis(2-diphenylphosphinophenyl)ether, Xantphos = 9, 9-dimethyl-bis(diphenylphosphino)xanthenes, PmH = 2-(pyridin-2-yl)benzimidazole, Pm=(2-(Pyridin-2-yl)benzimidazolate), have been prepared and characterized by IR, 1 H NMR, 13 C NMR, 31 P NMR, XRD, elemental analysis and X-ray crystal structure analysis. The structural analysis shows that each of Cu(I) complexes includes a tetrahedral [Cu(NN) (PP)] + moiety, and temperature variation from 99 K to 298 K leads to the change of bonds lengths, angles and weak interactions. Meanwhile, theoretical calculations indicate that the differences between cationic and neutral Cu(I) complexes affect the composition of HOMO and LUMO orbitals, and the effect of temperature on Mülliken atomic charges is limited. Furthermore, neutral Cu(I) complexes 1b–3b show better luminescence in comparison to cationic Cu(I) complexes 1a-3a at room temperature , and temperature variations from 99 K to 298 K result in changing photoluminescence to some extent, which partly agrees with the related calculation results. In these cationic and neutral Cu(I) complexes, the maximum phosphorescent lifetime and quantum yield reach respectively 137 μs and 42% at room temperature. Moreover, cationic and neutral Cu(I) complexes are utilized to fabricate the monochromatic LEDs, showing favorable electroluminescence with the maximum EQE of 7.10%.
研究领域:
材料化学
·
光学
·
理论计算
✓ 已验证
DOI
高影响因子
Bioactive Carbohydrates and Dietary Fibre
·
2021
·
IF 0
Dongmei Wu,Xiaoliang Zheng,Weiwei Hu,Kai Zhu,Chengxiao Yu,Qiaojun He,Robert J. Linhardt,Xingqian Ye,Shiguo Chen
Pectic oligosaccharides are viewed as excellent immunomodulator, but the specific molecular weight (M w ) range required for anti-inflammatory effects remains unclear. In this study, citrus pectins was depolymerized by the ultrasound/H2O2/Vc system and the pectic mixtures was separated through the superdex 30 chromatography column . Three highly purified pectin fractions (USP1, USP2, USP3) were obtained, with the M w of 2713 g/mol, 3683 g/mol, and 7469 g/mol. All of them were RG-I pectins and USP3 contained more arabinan sidechains than USP1 and USP2. In vitro anti-inflammation assays based on LPS-induced RAW264.7 macrophages indicated that these pectins could suppress the NO release, ROS production and down-regulated the level of pro-inflammatory cytokines IL-1β, IL-6 and TNF-α in a M w -dependent manner. The inhibitory effects increased in the order of USP13KD should be effective as a prophylactic agent against inflammatory diseases in functional food.
研究领域:
食品科学
·
生物化学
·
免疫学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）