MOLECULES
·
2019
·Vol. 24
·期 15
·2835
·
IF 3.06
Wei Lin,Cangwei Zhuang,Xiuxiu Hu,Juanjuan Zhang,Juxian Wang
A concise and efficient approach to synthesizing coumarin-fused pyrazolo[3,4-b]pyridine via silica sulfuric acid (SSA) catalyzed three-component domino reaction under microwave irradiation has been demonstrated. Participation of various alcohols in construction of coumarin derivatives has been described for the first time. Short reaction time, high yields, one-pot procedure, usage of eco-friendly catalyst, and solvent are the key features of this method.Keywords:coumarin;pyrazolo[3,4-b]pyridine;synthesis;silica sulfuric acid
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Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 47
·12422-12429
·
IF 5.256
T. T. Deng,E. H. Song,Y. Y. Zhou,L. Y. Wang,Q. Y. Zhang
Three isotypic double perovskites A2BAlF6:Mn4+ (A = Rb, Cs; B = K, Rb) were synthesized via a facile co-precipitation method at room temperature. XRD Rietveld refinements and Raman spectra indicate that the neighboring smaller A-site or larger B-site cation in A2BAlF6:Mn4+ lowers structural stability, but suppresses the [AlF6] octahedron to increase the crystal field strength and bond strength of the Al–F bond. Cs2KAlF6:Mn4+ presents a sharp line red light and excellent moisture resistance, but experiences severe thermal quenching. In comparison, altering the A- or B-site cation to Rb, Rb2KAlF6:Mn4+ and Cs2RbAlF6:Mn4+ shows blue shifts in emission and declining water resistance, but enhancements in thermal stability. A combination of static and dynamic emission degradations demonstrates that the water resistance of Mn4+ emission mainly relies on the structural stability of the host matrix; meanwhile, the thermal stability highly depends on the rigidity of its local accommodation. The variations of the temperature-dependent white light-emitting diode (WLED) performances further evidence their sufficient thermal stability for LED applications. These findings suggest that neighboring-cation modulation might be a feasible guideline for exploiting stable Mn4+-activated fluoride red phosphors in warm WLED applications.
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RSC Advances
·
2015
·Vol. 5
·期 121
·99664-99668
·
IF 3.84
Zheng Tang,Xiao-Ling Ding,Ying Liu,Zhi-Min Zhao,Bao-Xiang Zhao
We have developed a novel fluorescent probe (RBT) based on rhodamine B and benzothiazole hydrazine units for the detection of hypochlorite in living cells and real water samples with excellent selectivity and sensitivity. In the presence of hypochlorite in a mixture solution of MeCN–PBS (v/v = 3 : 7, pH = 7.4) at room temperature, the fluorescence intensity of RBT increased by 350 fold with the color change from colorless to red. The detection limit of the probe for hypochlorite is 1.06 × 10−9 M. Moreover, RBT was successfully used to image endogenous hypochlorite in living cells and detect hypochlorite in real water samples.
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高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2019
·
IF 4.745
Shanjian Mao,Yinbo Wan,Haiyun Peng,Li Luo,Guisheng Deng
Pd(PPh3)2Cl2-catalyzed selective tandem cyclization/oxidation of available conjugated diazo ene-yne-ketones under O2 atmosphere led to the formation of diazo trisubstituted furans. The Rh2(OAc)4-mediated selective C(sp2)–H insertion at the ortho-position of 2-aryl group (R1) of the furan moiety under N2 atmosphere occurred to construct naphthalene cycle, affording trifunctionalized naphtho[1,2-b]furans. C(sp2)–H insertion at the 4-position of the furan ring, and Wolf rearrangement of diazo moiety have not been observed.
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高影响因子
Frontiers of Environmental Science & Engineering
·
2021
·Vol. 16
·期 3
·1-16
·
IF 4.357
Zhao Shuangyang,Chen Chengxin,Ding Jie,Yang Shanshan,Zang Yani,Ren Nanqi
Fabrication of easily recyclable photocatalyst with excellent photocatalytic activity for degradation of organic pollutants in wastewater is highly desirable for practical application. In this study, a novel ternary magnetic photocatalyst BiVO 4 /Fe 3 O 4 /reduced graphene oxide (BiVO 4 /Fe 3 O 4 /rGO) was synthesized via a facile hydrothermal strategy. The BiVO 4 /Fe 3 O 4 with 0.5 wt% of rGO (BiVO 4 /Fe 3 O 4 /0.5% rGO) exhibited superior activity, degrading greater than 99% Rhodamine B (RhB) after 120 min solar light radiation. The surface morphology and chemical composition of BiVO 4 /Fe 3 O 4 /rGO were studied by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV visible diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. The free radicals scavenging experiments demonstrated that hole (h + ) and superoxide radical (O 2 •− ) were the dominant species for RhB degradation over BiVO 4 /Fe 3 O 4 /rGO under solar light. The reusability of this composite catalyst was also investigated after five successive runs under an external magnetic field. The BiVO 4 /Fe 3 O 4 /rGO composite was easily separated, and the recycled catalyst retained high photocatalytic activity. This study demonstrates that catalyst BiVO 4 /Fe 3 O 4 /rGO possessed high dye removal efficiency in water treatment with excellent recyclability from water after use. The current study provides a possibility for more practical and sustainable photocatalytic process.
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Energy Storage Materials
·
2018
·
IF 0
Xu Huang,Xuezhang Xiao,Xuancheng Wang,Zhendong Yao,Chuntao Wang,Xiulin Fan,Lixin Chen
Li-Mg-B-H system with the composition of 2LiBH 4 -MgH 2 is one of the most promising reversible hydrogen storage materials because of the extremely high hydrogen storage capacity (11.5 wt%). Yet, sluggish kinetics with high desorption temperature (~ 400 °C) hindered its practical applications. Herein, a highly efficient catalyst of nanoNi@g-C 3 N 4 , comprised of transition metal nanocatalyst and carbon-based nonmetal material, was designed and fabricated to dramatically reduce its initial hydrogen desorption temperature to as low as ~105 °C, and eliminate induction period between the two dehydrogenation steps of 2LiBH 4 -MgH 2 by reducing the activation energy for the dehydrogenation of LiBH 4 from 200±6 to 126±7 kJ/mol. Multiple postmortem analyses revealed that the in situ formed MgNi 3 B 2 NPs and the H + defects on g-C 3 N 4 play the key role in synergically enhancing the hydrogen reversible desorption/absorption kinetics at low temperature: 1) in situ formed MgNi 3 B 2 acts as nucleation center of MgB 2 and leads to an excellent catalytic effect to accelerate the dehydrogenation kinetics of 2LiBH 4 -MgH 2 ; 2) the H + defects on g-C 3 N 4 , will interact with the H – in LiBH 4 to trigger the release of H 2 at low temperature and destabilize LiBH 4 and MgH 2 to form Li 3 N and Mg 3 N 2 respectively for the high electronegativity of N: 3) these in situ formed intermediates of Li 3 N and Mg 3 N 2 will be readily rehydrogenated as highly reversible Mg(NH 2 ) 2 and LiH. This novel transition metal and g-C 3 N 4 catalytic composites could provide alternative insights into designing nanosized catalytic hydrogen storage system with low desorption temperature and high capacity for hydrogen-fueled applications.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yayun Jiang,E Jianfei,Youwei Li,Jian Chen,Jie Yang,Yang He,Gang Mai,Laibao Zheng
Group B Streptococcus (GBS) is a major cause of neonatal morbidity and mortality, underscoring the urgent need for rapid, accurate, and deployable diagnostics. Conventional culture and nucleic acid amplification tests are limited by long turnaround time, insufficient sensitivity, or dependence on sophisticated instrumentation, restricting their use in resource-limited settings. Here, we present a magnetically controlled dual-mode biosensing platform, termed c olorimetric/ p hotothermal–CRISPR/ Cas – Au @ Pt nanozyme (CP-CasAuPt), which integrates the sequence-specific trans-cleavage activity of CRISPR/Cas12a with the peroxidase-mimicking activity of Au@PtNPs. The catalytic oxidation of 3,3′,5,5′-Tetramethylbenzidine (TMB) generates oxidized TMB (oxTMB), which provides a visible colorimetric change and a near-infrared photothermal response, thereby enabling reliable dual-mode readouts with minimal instrumentation. Magnetic bead-assisted separation further reduces background signals, ensuring robust performance in complex matrices. Using GBS as a proof-of-concept, CP-CasAuPt achieved a detection limit of 10 3 CFU/mL after loop-mediated isothermal amplification, with results fully consistent with qPCR across 20 clinical samples. Beyond high sensitivity and specificity, this study establishes a generalizable strategy for multimodal molecular diagnostics, where orthogonal dual signals allow cross-validation, ensuring robust detection across diverse assay conditions. The CP-CasAuPt system thus offers a promising paradigm for rapid, instrument-free pathogen detection, particularly suited for resource-limited settings.
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DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 7
·1762-1770
·
IF 7.2
Ma Qin,Shi Lin,Ran Baocheng,Ma Tianfeng,Wang Huan,Lu Yongchang
Up to now, “Turn-on” fluorescence sensor exhibits promising potential toward the detection of heavy metal ions, anions, drugs, organic dyes, DNA, pesticides, and other amino acids due to their simple, quick detection, and high sensitivity and selectivity. Herein, a novel fluorescence method of detecting Cr 3+ in an aqueous solution was described based on the fluorescence resonance energy transfer between rhodamine B (RhB) and gold nanoparticles (AuNPs). The fluorescence of RhB solution could be obviously quenched (“off” state) with the presence of citrate-stabilized AuNPs. However, upon addition of Cr 3+ to AuNPs@RhB system, the fluorescence of AuNPs was recovered owing to the strong interaction between Cr 3+ and the specific groups on the surface of citrate-stabilized AuNPs, which will lead to the aggregation of AuNPs (“on” state). At this point, the color of the reaction solution turned to black. Under optimal conditions, the limit of detection (LOD) for Cr 3+ was 0.95 nM (signal-to-noise ratio, S/N = 3) with a linear range of 0.164 nM to 3.270 µM. Furthermore, the proposed method exhibits excellent performances, such as rapid analysis, high sensitivity, extraordinary selectivity, easy preparation, switch-on fluorescence response, and non-time consuming.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Tao Jiang,Jin Zhang,Miaomiao Han,Yadong Liu,Shengxiang Ji
Directed self-assembly (DSA) of block copolymers (BCPs) has shown great potential for creating sub-10 nm patterns for advanced semiconductor manufacturing. It is necessary to develop block copolymers with high Flory–Huggins interaction parameters (χ) and similar surface energies (γ) between constituent blocks. Herein, this work presents the synthesis of lamellae-forming poly(4-chlorostyrene-b-methyl acrylate) (P4ClS-b-PMA) and investigates the DSA behavior of P4ClS-b-PMA. P4ClS-b-PMA has a higher χ than poly(styrene-b-methyl methacrylate) (PS-b-PMMA) and poly(styrene-b-methyl acrylate) (PS-b-PMA), resulting in the smallest achievable period (L0) to 14.1 nm. Notably, the P4ClS and PMA blocks possess similar γ values, which facilitates the formation of perpendicularly orientated domains in P4ClS-b-PMA films on neutral, substrate-modified silicon wafers under thermal annealing. 7× density multiplication DSA of P4ClS-b-PMA is successfully demonstrated in films on chemical patterns fabricated by 193 immersion (193i) lithography, with a feature size of about 7.5 nm. These findings confirm that P4ClS-b-PMA could be a potential candidate for DSA lithography.
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 10
·3501-3511
·
IF 3.348
Chengying Yang,Honghong Li,Zeyu Wu,Xusheng Huang,An Zhou,Ailing Hui,Rui Liu,Wencheng Zhang
In this article, novel molecularly imprinted polymers based on 3D reduced graphene oxide aerogel (3D RGO-GBMIPs) were successfully fabricated and applied as adsorbents for dispersed solid-phase extraction (DSPE) of ginkgolide B (GB). After being prepared by surface molecular imprinted technology, 3D RGO-GBMIPs were successively characterized by fourier transform infrared spectroscopy, thermogravimetric analysis, Raman spectroscopy, and scanning electron microscope. The results of adsorption experiments revealed that 3D RGO-GBMIPs presented highly selective recognition properties and well reusability. The main variables influencing DSPE efficiency, including extraction solvent, 3D RGO-GBMIPs dosage, category, and volume of eluent, as well as elution time were investigated. The DSPE results showed that 3D RGO-GBMIPs had an obvious effect on the improvement of GB purity in ginkgo biloba extract, with a satisfactory recovery rate and yield. Therefore, 3D RGO-GBMIPs are expected to be applied for the enrichment of GB from complex matrices.
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Nanoscale
·
2022
·Vol. 14
·期 5
·2004-2012
·
IF 8.307
Xiaopeng Zhang,Yingge Zhang,Jialong Qian,Yihe Zhang,Li Sun,Qi Wang
Zinc-ion hybrid capacitors (ZIHCs) are regarded as a potential candidate for large-scale energy storage devices. However, the inadequate cathode and the inferior wettability between the electrode and electrolyte hinder the construction of high-performance ZIHCs. Herein, boron (B) and sulfur (S) co-doped spongy-like hierarchically porous carbon (B2S3C) is first proposed as a cathode material for ZIHCs. Here, B doping is favorable for improving the wettability, while S doping contributes to enhancing the electrical properties. In addition, the density functional theory (DFT) results uncover that B and S atoms contribute to reducing the energy barrier between Zn2+ and the cathode, leading to boosted chemical adsorption ability of Zn2+ on the cathode. As a result, the assembled ZIHC based on B2S3C exhibits a high specific capacity of 182.6 mA h g−1 at 0.1 A g−1, an excellent capacity retention of 96.2% after 10 000 cycles and a remarkable energy density of 292.2 W h kg−1 at a power density of 62.2 W kg−1, superior to the previously reported ZIHCs. Due to the flexibility of the assembled electrodes, the solid-state ZIHC can sustain various deformations. This work paves a feasible path for the development of cost-effective and high-performance porous carbon materials.
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2014
·
IF 0.7
Xian-En ZHAO,Tao LÜ,Na WEI,Shu-Yun ZHU,Jin-Mao YOU
Commercial Rhodamine B was first reported as a derivatization reagent labeling hydroxyl compound for mass spectrometry sensitization. In virtue of the strategy of ultrasonic-assisted dispersive liquid-liquid microextraction (UA-DLLME) combined with Rhodamine B derivatization, a new method of ultrahigh performance liquid chromatography triple quadrupole mass spectrometry (UHPLC-MS/MS) was developed for the sensitive determination of Panaxadiol (PD). UA-DLLME and derivatization conditions were investigated. PD in cosmetics and ginseng was extracted by UA-DLLME (150 μL chloroform as extraction solvent, 500 μL ethanol as disperser solvent, 3 min). Using Rhodamine B as precolumn derivatization reagent, the stable derivative of PD was obtained in acetonitrile at 70 °C for 30 min under microwave radiation (800 W) with the catalyst of N, N ′-carbonyldiimidazole (CDI) and 4-dimethylaminopyridine (DMAP). And then the PD derivative was separated and detected within 3 min by multiple reaction monitoring (MRM) mode of UHPLC-MS/MS. The LOD was 4.0 ng L −1 , and the LOQ was 15.0 ng L −1 . This method had perfect linearity, precision and recovery results, and showed obvious advantages such as sensitivity and low matrix effect in comparison with the previously reported methods.
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