RSC Advances
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2020
·Vol. 10
·期 65
·39814-39821
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IF 3.119
Xin Min,Changchao Zhan,Ping Yan,Zhigang Ye
A novel hydroxyl-terminated π-allyl nickel initiator [η3-Ni(CH2CHCHCH2OCOCH3)][BPhF4] is synthesized for the first time. 1H-NMR analysis confirms that the Ni initiator possesses a typical π-allyl structure with a protected hydroxyl group. The Ni initiator is applied to synthesize hydroxyl-terminated poly(3-hexylthiophene). It successfully initiates the homopolymerization of thiophene, and yields narrow molecular weight distribution, hydroxyl-terminated poly(3-hexylthiophene). Moreover, it is found that [η3-Ni(CH2CHCHCH2OCOCH3)][BPhF4] has high initiating activity in the polymerization of styrene and butadiene. A hydroxyl-terminated polybutadiene-b-poly(3-hexylthiophene) block copolymer is synthesized by using [η3-Ni(CH2CHCHCH2OCOCH3)][BPhF4] to improve the workability and brittleness of poly(3-hexylthiophene).
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JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Jiao Sha,Di Fan,Jingyi Zhang,Zidan Cao,Yameng Wan,Renren Sun,Haixia He,Gaoliang Jiang,Yu Li,Tao Li,Baozeng Ren
The equilibrium solubility of nimesulide (NIMS) in twelve single solvents was accurately measured by a laser monitoring method. It was indicated that the positive impact of experimental temperature on the solubility data of NIMS (Form I) in twelve mono-solvents within the investigated temperature range of 278.15–323.15 K under 101.3 KPa. The solubility shows a clear non-linear trend and decreased in the order methyl acetate > ethyl acetate >2-methoxyethanol > n-propyl acetate > n-butyl acetate >2-ethoxyethanol >2-propoxyethanol >2-butoxyethanol > methanol > ethanol > n-propanol > n-butanol. NIMS (Form I) has the highest solubility ( x 1 = 5.223e-2) in methyl acetate at 323.15 K and the smallest solubility ( x 1 = 6.800e-6) in n-butanol at 278.15 K. And then, the solvent polarity, radial distribution function obtained from molecular dynamic simulation and solvent effect (KAT-LSER model) were implemented to investigate the effect of solute-solvent interactions on solid-liquid phase equilibrium of NIMS (Form I). The results demonstrated that the whole dissolution behavior of NIMS (Form I) in organic solvents was a complicated process, and the solvent-solute interactions are mainly affected by the dipolarity/polarizability. Moreover, five widely used activity coefficient models including NRTL, NRTL-SAC, Wilson, Two-Suffix Margules, and UNIQUAC models had been fitted to experimental solubility data. Deviation analysis reveals that the UNIQUAC model reflects the best agreement between the measured data and calculated values, with the minimum mean values of 100ARD (0.89) and RMSD (1.22e-4). Finally, the thermodynamic parameters (Δ dis G o , Δ dis H o , Δ dis S o , ζ H and ζ TS ) of NIMS (Form I) dissolution process in investigated 12 single solvents were evaluated based on the van't Hoff equation. The positive Δ dis G o , Δ dis H o and Δ dis S o indicate that the dissolution process of NIMS (Form I) is an entropy-driven non-spontaneous endothermic process in all chosen single solvents, and the ζ H is the main contributor of Δ dis G o .
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BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
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2021
·Vol. 94
·期 8
·2133-2138
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IF 5.488
Zheng Ming-Xin,Yao Chan,Xie Wei,Xu Yan-Hong,Hu Hui
Mercury is a toxic substance that is harmful to human health and the environment. It is a great challenge to overcome the pollution of mercury via designing suitable adsorbent decorated with abundant chelating sites on a solid surface together with high affinity for heavy metals. Herein, we employed a flexible building block 4,4′-dithiodianiline as a connector, and together with tetraphenylethylene tetraaldehyde to construct a periodic 3D extended framework with bright green-yellow luminescence (TPE-S-COF), in which the active sites of sulfur are uniformly distributed in pore walls. This allows TPE-S-COF to be used as a sensitive chemosensor to selectively detect toxic mercury ions; and has an adsorption capacity of 48 and 42.4 mg g−1 for Hg+ or Hg2+, respectively. More interestingly, the detection performance of TPE-S-COF towards mercury ions can be directly observed by the naked eye. And, it can be reused without loss of sensitivity and responsiveness.
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Journal of Macromolecular Science Part B-Physics
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2022
·
IF 1.366
Zengze Chu,Chen Liu,Xinxi Zhang
Copper(I) thiocyanate (CuSCN) is a cost-effective and excellent inorganic p-type semiconductor; it has attracted considerable attention as hole-transporting material for highly efficient perovskite solar cells (PSCs) in recent years. However, various interface issues are currently regarded as the main obstacles for the CuSCN-based PSCs. Herein, we designed and synthesized a star-shaped oligomer (SFX-10) based on a spiro(fluorene-9,9’-xanthene) core terminated with fluorene groups by a simple Sonogashira coupling reaction, and its molecular structure was characterized with 1H, 13C NMR spectra and a high-resolution mass spectrum. The thermal, optical, and electrochemical properties of SFX-10 were fully investigated. SFX-10 shows good thermal stability with a high glass transition temperature of 138 °C. The photovoltaic performance measurements demonstrated that the CuSCN-based PSC using SFX-10 as an interlayer shows an evident improvement in power conversion efficiency of 6.61% compared with 5.52% for the bare device due to the passivation effect of the perovskite surface and the enhancement of the interfacial contact between the perovskite and CuSCN layers.
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ANALYTICA CHIMICA ACTA
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2026
·
IF 6
Xueyong Qiao,Rongrong Yang,Zhonghui Han,Lei Lü,Xiaolei Zhao,Jinxing He
Background The accurate, ultrasensitive, and on-site detection of pollutants is critical for public health. As a carcinogen, Sudan I is strictly forbidden from use in food products at any levels. However, the conventional method suffers from the high instrument cost and complex procedure, resulting in poor sensitivity, low portability, and long detection time. A ratiometric fluorescence sensor offers a promising prospect for the ultra-rapid, high sensitivity, visual detection, and “point-of-care” testing. The objective of this work was to address the insufficient selectivity of fluorescence probe and enhance the recognition capability and mass transfer rate while diversifying their signal output modes. Results In this study, a novel hollow metal-organic frameworks (MOFs) structural biomimetic nanosensor was developed for the specific recognition and rapid analysis of Sudan I. The sensor separately integrated CsPbCl 1.5 Br 1.5 perovskite quantum dots and CdSe/ZnS quantum dots as dual-emission fluorophores into hollow MOFs-based molecularly imprinted polymers, acting as the recognition element and a signal carrier. The hollow architecture significantly improved mass transfer efficiency, reducing response time to 10 min. The developed nanosensor in instrumental analysis mode exhibited a linearity within the range of 2.00–200.00 μg L −1 at a method's detection limit of 1.00 μg L −1 , indicating high accuracy with recoveries of 88.00–109.65 % in real samples. Furthermore, a smartphone-based portable platform was designed for on-site intelligence detection with a good linear range (0.15–5.00 μg mL −1 ), a method's detection limit of 0.05 μg mL −1 , and recoveries ranging from 80.20 % to 109.00 %, allowing for real-time quantitative monitoring of Sudan I. Significance This study employs hollow MOFs as support materials for in-situ growth of the imprinting layer, ensuring high adsorption capability and rapid binding. The successful implementation of two detection modes provides a comprehensive solution from laboratory precision to field application. Particularly, the portable sensing system enables real-time and on-site quantitative monitoring. This work exhibits the significant potential for the high-performance chemical sensing and point-of-care detection of food contaminants.
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JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Huiyang Xu,Junwei Zhuo,Wenjun Chen,Zhiwei Li,Xiaorui Huang,Yongyi Li,Shuanglong Li,Bo Wang,Junyu Huang,Zimo Wang,Wei Li
A novel Zn 3 In 2 S 6 @Bi 2 Te 3 @C 3 N 5 ternary S-scheme/Type-I heterojunction is constructed. • Topological insulator Bi 2 Te 3 serves as the charge transport bridge. • The catalyst has an exceptional HER rate (42384.11 μmol g −1 h −1 ) with a 29.83% AQY. Addressing the core electrochemical bottlenecks of sluggish interfacial charge transfer and the charge separation-redox capability trade-off in photoelectrochemical water splitting, this work introduces 3D topological insulator Bi 2 Te 3 as a backscattering-free electrochemical charge transport bridge to construct a Zn 3 In 2 S 6 @Bi 2 Te 3 @C 3 N 5 ternary heterojunction with Step-scheme/Type-I synergistic charge transfer. The rationally optimized sample achieves an exceptional visible-light-driven hydrogen evolution rate of 42384.11 μmol g −1 h −1 with an apparent quantum yield of 29.83% at 420 nm, which are 1.68 and 27.43 times higher than those of pristine Zn 3 In 2 S 6 and as-synthesized C 3 N 5 , respectively. The superior performance originates from three synergistic effects: enhanced light harvesting by the multi-component system, promoted carrier separation driven by the robust built-in electric field at heterointerfaces, and improved charge transport efficiency along with optimized hydrogen evolution reaction (HER) kinetics endowed by Bi 2 Te 3 's topological properties. These advantages accelerate electron transport and suppress non-radiative recombination, providing insights for optimizing the kinetics of the HER at the electrochemical interface. Photocatalytic water splitting for hydrogen production offers a promising route to address the energy crisis; however, the rapid recombination of photogenerated carriers in conventional photocatalysts severely limits their efficiency. To overcome this bottleneck, we designed and constructed a novel Zn 3 In 2 S 6 @Bi 2 Te 3 @C 3 N 5 ternary heterojunction photocatalyst. In this system, Bi 2 Te 3 acts as a topological insulator and charge-transport bridge, forming a cascaded band alignment with Zn 3 In 2 S 6 and C 3 N 5 . This establishes a synergistic charge-transfer pathway that effectively promotes the spatial separation of photogenerated electron–hole pairs. The optimized catalyst exhibits outstanding visible-light-driven hydrogen evolution performance, achieving a remarkable HER rate of 42384.11 μmol g −1 h −1 and a high apparent quantum yield of 29.83% at 420 nm, along with excellent long-term cycling stability. This work provides new insights into designing efficient and stable photocatalysts for hydrogen evolution. Download: Download high-res image (381KB) Download: Download full-size image
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HYDROMETALLURGY
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2026
·
IF 6.3
Yangxiang Huang,Mengyao Chen,Lixin Xue,Hangqing Xue,Juexin Wang,Fei Huang,Congjie Gao
To simultaneously increase the Mg 2+ /Li + separating performance under high Mg 2+ /Li + ratios of polyethylene/polyamide (PE/PA) thin film composite (TFC) nanofiltration (NF) membranes, 1,4,7,10-tetraazacyclododecane (Cyclen) was added in the aqueous phase with polyethyleneimine (PEI) monomer. During reverse interface polymerization (RIP) on polyethylene (PE) substrates, phthaloyl chloride (PC) was added to the organic phase with terephthaloyl chloride (TPC) monomer. It was found that the addition of Cyclen and/or PC could both increase the hydrophilicity, surface roughness and average pore sizes of formed virgin PE/PA TFC NF membranes, leading to increased water permeability. The Li + /Mg 2+ separating factor S Li/Mg first increased and then decreased with maximum points at the TPC/PC ratio of 5:1 and Cyclen addition level of 0.02 wt%. Cation absorption, especially Mg(II)-Cyclen interactions in the PA layers under higher Mg 2+ /Li + ratio led to increased surface Zeta potential, decreased average pore diameters μ p, and greatly increased Li + /Mg 2+ separating factor (S Li/Mg ). S Li/Mg value of PEI-TPC/PC 5:1 -Cyclen 0.02 membranes could be increased from 5.0 to 55.47, keeping the water permeability around 6.5 L m −2 h −1 bar −1 when Mg 2+ /Li + ratio increased from 1 to 100 in the brine.
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ANTIVIRAL RESEARCH
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2026
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IF 4.3
Pu Wang,Xinchang Liu,Yong Xie,Yingjun Zhang,Baohua Gu,Jing Li,Yunfu Chen
CAM-A (GLS4) rapidly suppresses HBV DNA with delayed HBsAg decline and ALT flares. • CAM-A upregulates ISGs and activates IFN-α/γ pathways in HBV models. • CAM-A induces TUNEL + caspase-3-independent death of HBcAg + hepatocytes. • CAM-A effects persist without adaptive immunity; synergize with innate immunemodulators such as TLR7 agonist. Capsid assembly modulators (CAMs) are promising antiviral agents for chronic hepatitis B virus (HBV) infection. This study investigates the anti-HBV activity and immunomodulatory effects of Class I CAMs (CAM-A) in vitro and in vivo . In HepAD38 cells, CAM-A treatment significantly upregulated the expression of interferon-stimulated genes (IP-10, MX1, OAS1). In AAV-HBV mice, CAM-A (GLS4) induced rapid reductions in HBV DNA and delayed HBsAg decline accompanied by transient ALT elevation, upregulated interferons and Tnfsf10/Tnfrsf10b gene expression, while terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) and immunohistochemistry (IHC) experiments indicated caspase-3-independent cell death in HBV-infected hepatocytes. Importantly, the antiviral and HBsAg-lowering effects of CAM-A did not require adaptive immunity. Furthermore, combination of CAM-A with a TLR7 agonist in AAV-HBV mice, or with Peg-IFN-α in primary human hepatocytes (PHH) resulted in synergistic antiviral effects, underscoring the therapeutic potential of these agents to promote sustained HBsAg decline and support functional cure strategies in chronic HBV infection.
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Analytical Methods
·
2022
·Vol. 14
·期 5
·549-559
·
IF 3.532
Qiaoling Wu,Chun Ji,Lingli Zhang,Qili Shi,Yuangen Wu,Han Tao
The work presented here describes a highly sensitive and simple electrochemical sensor for the detection of Sudan I dye based on a nanocomposite made of MoS2 heterogeneous nanosheets (1T@2H-MoS2) and carboxylated carbon nanotubes (cMWCNTs) (1T@2H-MoS2/cMWCNTs). XPS results indicate that the content of 1T phase MoS2 was estimated to be 72% in 1T@2H-MoS2. Electron microscopy results show that the tubular cMWCNTs are uniformly interwoven in MoS2 nanosheets to form a three-dimensional network structure. Due to the synergistic electrocatalytic ability and high electroactive surface area, the 1T@2H-MoS2/cMWCNTs modified electrode demonstrated excellent analytical performance for Sudan I, including simple operation, good stability and a wide linear range from 5.00 × 10−9 to 2.00 × 10−6 mol L−1 and 2.00 × 10−6 to 1.00 × 10−4 mol L−1 with an ultra-low detection limit of 1.56 × 10−9 mol L−1. The recoveries of Sudan I from spiked real samples (chilli powder and ketchup) were in the range of 95.60% to 106.10% with low RSD (<5%), indicating that the 1T@2H-MoS2/cMWCNTs modified electrode is a promising tool for the analysis of illegal Sudan I in food samples.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Ping Wang,Huikai Ma,Yanfeng Zhu,Wei Feng,Mengyao Su,Sanqiang Li,Hongju Mao
In this work, a novel ratiometric electrochemical aptasensor was designed on the basis of dual-amplification mechanism by using exonuclease I (Exo I)-assisted target recycling and hybridization chain reaction (HCR). The thiol-modified capture DNA (Cp-DNA) was fixed on the surface of the gold electrode (AuE) modified with gold nanoparticles (AuNPs) through Au-S bonds. The ferrocene (Fc)-labeled DNA (Fc-DNA) hybridized with Cp-DNA to form Fc-DNA/Cp-DNA duplex. The presence of carcinoembryonic antigen (CEA) led to the dissociation of Fc-DNA from Fc-DNA/Cp-DNA duplex and initiated Exo Ⅰ-assisted target recycling to digest Fc-DNA, so numerous Fc left away from the electrode surface and resulting in the “signal off” of Fc. Moreover, Cp-DNA was exposed to bind trigger DNA and initiate HCR with the presence of H1 and H2 probes, resulting in the intercalating of numerous methylene blue (MB) molecules and the “signal-on” of MB. This dual signal strategy significantly amplified the decrease of Fc signal and the increase of MB signal, achieving a linear range of 1 pg mL −1 to 100 ng mL −1 with a detection limit of 0.479 pg mL −1 (S/N = 3). Besides, the developed aptasensor exhibited high specificity, good stability and reproducibility. More importantly, the aptasensor had been applied in detection of CEA in diluted human serum and displayed satisfactory anti-interference property. By changing the corresponding aptamer sequences, the designed strategy can be employed to detect other targets, which holds promising application in clinical diagnosis.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Jinxing He,Lu Yu,Yandu Jiang,Lei Lü,Zhonghui Han,Xiaolei Zhao,Zhixiang Xu
All-inorganic cesium lead halides (CsPbX 3 , X = Cl, Br, I) perovskite quantum dots (PQDs) have attracted extensive research attention due to their unique optical properties. However, their instability and sensitivity to air and moisture hinder further use in fluorescent sensing applications. In this work, the construction and application of PQDs encoded molecularly imprinted polymers (MIPs-CsPbX 3 ) for Sudan I detection were proposed. After being encoded the PQDs, the obtained MIPs-CsPbX 3 microspheres exhibited high stability for the external environment, remarkable bright fluorescence, and specific recognition for Sudan I. The fluorescent intensity of the MIPs-CsPbX 3 microspheres was obviously quenched upon loading Sudan I, and good linear responses in the range of 0.5–150 µg L −1 , limit of detection of 0.3 µg L −1 , and good recoveries of 95.27 % to 105.96 % in spiked samples were obtained. The developed fluorescent probe provided a selective and sensitive quantified method for Sudan I detection in food matrices.
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CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Da Chen,Shiqiang Hao,Liubing Fan,Yangwu Guo,Jiyong Yao,Christopher Wolverton,Mercouri G. Kanatzidis,Jing Zhao,Quanlin Liu
Recent discoveries in organic−inorganic metal halides reveal superior semiconducting and polarization properties. Herein, we report three organic–inorganic metal halides, (PBA)4BiBr7·H2O, (PBA)4BiI7·H2O, and (PBA)4InBr7·H2O [(PBA)+ = C6H5(CH2)4NH3+], with band gaps of ∼3.52, ∼2.29, and ∼4.05 eV, respectively. They possess zero-dimensional structures containing the inorganic octahedra [MX6]3– (M = Bi, In, X = Br, I) and unbound X– ions and crystallize in the C2 space group. (PBA)4BiI7·H2O shows a second-harmonic-generation (SHG) response in the infrared region, approximately 1.3 times that of AgGaS2; (PBA)4BiBr7·H2O and (PBA)4InBr7·H2O show SHG responses in the ultraviolet region, approximately 0.4 and 0.6 times that of KH2PO4, respectively. The large SHG responses are attributed to the synergistic contribution of the octahedral distortion of [MX6]3– (M = Bi, In, X = Br, I) and the ordered arrangement of the benzene ring-containing organic cation PBA+. Upon ultraviolet and visible-light excitations at room temperature, (PBA)4BiBr7·H2O, (PBA)4BiI7·H2O, and (PBA)4InBr7·H2O exhibit broad red-light luminescence with large Stokes shifts of 290, 237, and 360 nm, respectively, due to self-trapped exciton emission. All of these properties demonstrate that this series of metal halides are potential multifunctional optoelectronic materials.
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