DYES AND PIGMENTS
·
2018
·
IF 3.767
Xueyan Wu,Jixi Guo,Wei Jia,Jianzhang Zhao,Dianzeng Jia,Huici Shan
A facile and efficient method is described to greatly improve the emission efficiency of anthracene- o -carborane dyad by linking two o -carborane building blocks together through tailored alkyl linkages. Improvement of the emission efficiency of the tethered anthracene- o -carborane dyads was achieved with the quantum yield up to 40.8% and 51.4% for BCAC4 and BCAC6 respectively, in contrast to that of CAH (4.3%) and CAA (36%), demonstrating that the cooperation advocates that one plus one is much bigger than two. In addition, these developed emissive AIE luminogens exhibit impressive response to the environmental stimuli of viscosity and temperature. DFT calculations were carried out to explore the influence of the anthryl and alkyl linkages on emission efficiency. Our materials and concepts are useful as a guideline for designing o -carborane-containing highly-efficient solid luminescent materials with stimuli-responsive properties.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 20
·9066-9072
·
IF 3.591
Shaoguang Li,Huilin Liu,Xiaoying Zhang,Jiasong Cai,Kunlong Huang,Bing Chen,Liying Huang,Zhen Lin,Xinhua Lin,Hong Yao
A label-free, rapid, and highly sensitive colorimetric assay for the detection of glutathione (GSH) was developed. o-Phenylenediamine (OPD) can be selectively oxidized by Au3+ in phosphate buffer to produce light yellow 2,3-diaminophenazine. After the addition of GSH, the autocatalytic redox reaction between OPD and Au3+ can be effectively inhibited, resulting in a significant decrease in chroma and absorbance intensity. Reduced absorbance intensity can be used for the quantification of GSH. In addition, this method can achieve the discriminative detection of biothiols, such as cysteine and homocysteine. Based on these findings, a simple colorimetric assay was developed for the detection of GSH in the range of 1 nM to 1 mM with a low detection limit of 0.08 nM. More importantly, this procedure is simple, and the whole assay can be accomplished quickly within 15 min. Additionally, the proposed method was successfully used for the determination of GSH in biological fluids, such as serum samples.
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高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2014
·Vol. 25
·期 3
·535-543
·
IF 1.077
Zhou Yong-Hong
Three new multi-dimensional coordination polymers, namely, [Cd(SIP)(HBPP)(BPP) 0.5 (H 2 O)·H 2 O] n ( 1 ), [Zn(L)(BIB) 0.5 ] n ( 2 ), and {[Cd 2 (L) 2 (BIB) 2 ](H 2 O) 7 } n ( 3 ) (H 3 SIP = 5-sulfo-1,3-benzenedicarboxylate, BPP = 1,3-bis(4-pyridyl)propane, H 2 L = 4-oxyacetate-benzoic acid, and BIB = 1,4-bis(imidazol-1-yl)-butane), were hydrothermally synthesized by self-assembly of the flexible N-donor ligand and the polycarboxylate ligands. Single crystal X-ray analyses reveal that complexes 1 – 3 possess different structural features. The Cd(II) atom in complex 1 is seven-coordinated by two bidentate chelating carboxylate groups and two nitrogen atoms as well as one water molecule. The adjacent Cd(II) atoms are bridged by two carboxylate groups to form 1D chains running along different directions, which are connected by BPP ligands to generate 2D network. The resulting 2D networks are further linked by hydrogen-bond interactions, affording a 3D supramolecular architecture. In complex 2 , the [Zn 2 (COO) 4 ] units are bridged by L 2− ligands to generate 1D double chain structure and then linked by BIB ligands to give 2D grid framework. In complex 3 , the [Cd(L 2 )] n and [Cd(BIB)] n helixes are alternately arranged, leading to the formation of a 2D bilayer structure.
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高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Huici Shan,Anjie Liu,Yan Lv,Xueyan Wu,Yongdong Ma,Xiaoping Jin,Jixi Guo
Four D−π−A dyads based on various imidazole derivatives donor and o -carborane acceptor moiety have been designed and synthesized for efficient tunable solid-state fluorescence and low-temperature phosphorescence. The results showed that four dyads are all AIEgens with dual emission properties in solution, highly solid-state emission, and low-temperature phosphorescence. The dual emissions were attributed to the locally excited (LE) and twisted intramolecular charge transfer (TICT) emission. The crystallographic measurements and theoretical calculations demonstrated that the strong phosphorescence with a long lifetime up to 2.18 s at low temperature may be attributed to the C–H⋅⋅⋅N, C–H⋅⋅⋅π interactions, strong TICT effect and the reduced vibration coupling by attaching a bulky carborane moiety to the chromophore .
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高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 9
·1-9
·
IF 5.833
Ma Zerui,Li Pan,Jiao Meng,Shi Yu-e,Zhai Yongqing,Wang Zhenguang
Butyrylcholinesterase (BChE) can modulate the expression level of cholinesterase, which emerges as an important clinical diagnose index. However, the currently reported assays for BChE are suffering from the problem of interferences. A ratiometric fluorescence assay was developed based on the MnO 2 nanosheet (NS)–modulated fluorescence of sulfur quantum dots (S-dots) and o -phenylenediamine (OPD). MnO 2 NS can not only quench the fluorescence of blue emissive S-dots, but also enhance the yellow emissive OPD by catalyzing its oxidation reactions. Upon introducing BChE and substrate into the system, their hydrolysate can reduce MnO 2 into Mn 2+ , leading to the fluorescence recovery of S-dots and failure of OPD oxidation. BChE activity can be quantitatively detected by recording the change of fluorescence signals in the blue and yellow regions. A linear relationship is observed between the ratio of F 435 / F 560 and the concentration of BChE in the range 30 to 500 U/L, and a limit of detection of 17.8 U/L has been calculated. The ratiometric fluorescence assay shows an excellent selectivity to acetylcholinesterase and tolerance to various other species. The method developed provides good detection performances in human serum medium and for screening of inhibitors. Graphical abstract
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PubMed
高影响因子
Catalysts
·
2022
·Vol. 13
·期 1
·40
·
IF 4.501
Qiuyun Zhang,Mengmeng Hu,Jialu Wang,Yanting Lei,Yaping Wu,Qing Liu,Yongting Zhao,Yutao Zhang
In this study, the bimetallic Ni-Zr MOF-derived nickel-zirconium oxide (Ni-Zr-O)-impregnated silicotungstic acid (HSiW) nanocomposite catalyst (HSiW@Ni-Zr-O) was prepared via a hydrothermal procedure followed by a pyrolysis treatment, and its structural, morphological, and surface components and oxidation states were characterized by using XRD, FTIR, TPD-NH3, SEM, TEM, N2physisorption, and XPS analyses. Then, the nanocomposite catalysts were successfully applied to the esterification of oleic acid (OA) with methanol. According to its characteristics, the obtained HSiW@Ni-Zr-O-1 catalyst would generate larger pores, a higher acidity, and active interfaces at the calcining temperature of 300 °C. Therefore, HSiW@Ni-Zr-O-1 exhibits an excellent catalytic activity of 95.2% under optimal reaction conditions. Additionally, the catalyst can be reused with a good catalytic activity after nine cycles. This study highlights the opportunity of using bimetallic MOFs as precursors to the synthesis of highly nanoporous metal oxide, which supports the larger-industrial scale production of biofuels.Keywords:silicotungstic acid;MOF;nickel-zirconium oxide;esterification;biofuels;catalysis
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高影响因子
Journal of Food Measurement and Characterization
·
2019
·Vol. 14
·期 1
·535-547
·
IF 1.415
Al-Dalali Sam,Zheng Fuping,Sun Baoguo,Chen Feng,Wang Peng,Wang Wenping
Zhengrong vinegar is one of the renowned popular condiments in China, which has been consumed around Hebei province for about 136 years. Its different processing steps are considered as important and critical steps that are responsible for the generation of representative flavors besides the acetic acid. An HS-SPME coupled with GC–MS method was used to evaluate the changes of the volatiles of the vinegar that were generated during the different processing steps including before adding salt (BAS), after adding salt (AAS), after filtration (AF) and final product (FP). In addition, aroma-active volatiles of the final vinegar product were characterized by GC-O coupled with detection frequency technique (modified frequency, MF%) that is a combination of aroma intensity and aroma frequency values that can be used to improve the description of a reliable data from GC-O. Among the 42 detected volatiles, 38 of them were positively identified by their corresponding authentic compounds. Besides, 24 volatiles were recognized as aroma-active volatiles. On the other hand, the content of individual volatile groups was decreased along with the continuation of the fermentation process from the BAS step to FP step, except the aldehydes group that displayed a slight increase. Of which, 2-pentylfuran and ethyl heptanoate disappeared in the AF and FP samples. The main contributors to the Zhengrong aroma profile that had MF (%) > 80 included isovaleric acid, 2-acetoxy-3-butanone, hexanoic acid, ethyl hexanoate, 3-(methylthio)propyl acetate, decanal and 2-phenyl-2-butenal, while the volatile compounds that had a middle MF in a range between 70 and 80 were 2-methylbutanoic acid, tetramethylpyrazine, nonanal, 1,2-dimethoxybenzene, 4-ethylphenol, ethyl benzoate, ethyl benzeneacetate, 2-phenylethyl acetate and 4-ethylguaiacol.
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高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 21
·7200-7216
·
IF 6.119
Hairus Abdullah,Hardy Shuwanto,Dong-Hau Kuo
A Ni–Mg bimetal-doped Zn(O,S) photocatalyst has been synthesized, characterized, and tested for several photocatalytic applications. The hydrogen generation reaction, hydrogenation reaction for chemical transformation, detoxification of hexavalent chromium, and mixed dye (MB + RhB + MO) degradation under simulated solar-light illumination were confirmed. The essential characterization results indicated improved oxygen vacancy sites on the catalyst with enhanced photoresponse, better photocarrier separation, and facile charge transfer properties. A typical catalyst, NMZ-S10, was evaluated with a 1000-cycle CV test to demonstrate its long-term use for industrial application. Stable reusability experiments for the HER, PHR, PHC reaction, and PDM also supported the long-term application. The photocatalytic HER of NMZ-S10 could evolve hydrogen at a rate of 4000 μmol g−1 h−1. 30 ppm azobenzene-to-aniline conversion was completely done in 2 h of reaction. Detoxification of 30 ppm hexavalent chromium was conducted in 70 min of reaction. Finally, 10.5 ppm MB–RhB–MO mixed dye degradation was carried out in 1 h of reaction. The as-synthesized NMZ-S10 catalyst has demonstrated its capability to overcome energy and environmental issues promisingly. The great photocatalytic activities are discussed and elucidated with a plausible mechanism to rationalize the superb catalytic performance.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 22
·17814-17827
·
IF 2.779
Liu Zhuofeng,Liang Wenxue,Zhang Weijun,Wang Fenglin,Xun Yan,Chen Tongting,Li Wei,Chen Xingyu,Mao Haijun
The co-firing compatibility between green tape and the Ag electrode is a crucial characteristic in low-temperature co-fired ceramic (LTCC) technology and plays a vital role in improving the performance and application status of LTCC device modules. In this work, we studied the effects of lead content on the glass viscosity, the microstructure, and co-firing compatibility of silver electrode film. It was found that the softening point and viscosity of the glass were decreased, and the wettability between the glass and silver was improved with the increase of the lead content, which promoted the co-firing densification and interfacial bonding between the silver electrode film and the ceramic layer. The film presented the best electrical properties co-firing at 875 °C for 15 min, with the resistivity of 1.21 mΩ/sq. And the film was densified. The sintering interface was clear and well bonded. The results showed that an appropriate lead content in glass could effectively improve the interfacial bonding and the electrical properties during co-fired process, providing a new control methodology for realizing co-fired matching of the silver electrode film with low-temperature co-fired ceramics.
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Yu-Qin Mao,Guang-He Dong,Yuan-Qing Li,Pei Huang,Shao-Yun Fu
Doping engineering is a high-efficiency strategy to introduce heteroatom species and modify the surface electronic structures of porous carbon materials. However, the conventional doping strategies for porous carbons usually involve with either complicated fabrication processes or difficulty in quality control. Herein, nitrogen‑oxygen self-doped porous carbons (NOPCs) with adjustable structure are prepared by a facile one-step process of direct carbonization/activation the mixture of 2-methylimidazole (2-MeIM) and KOH. The as-prepared NOPCs possess hierarchical porous structure with interconnected micro-/ meso -/macropores, high specific surface area (2900 m 2 g −1 ), large pore volume (1.2 cm 3 g −1 ) and high N,O heteroatoms level (26.8 at.% in total), which exhibit ultra-high specific capacitance of 424.2 F g −1 at 1.0 A g −1 in a three-electrode system in 2 M KOH electrolyte and 173.4 F g −1 at 1.0 A g −1 in a two-electrode system in EMIMBF 4 ionic liquid electrolyte. Impressively, the symmetric supercapacitor based on NOPC exhibits a wide operating voltage window up to 3 V, a high energy density of 56.4 Wh kg −1 at a power density of 373.6 W kg −1 , excellent rate performance with the retention of ~76.2 % from 1.0 to 100 A g −1 , and splendid cycling stability with only 0.0011 % capacity fading per cycle within 10,000 loops. Consequently, the one-step carbonization/activation strategy with commercial-available 2-MeIM as raw material is promising for mass production of high performance NOPC materials.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 12
·e70119
·
IF 3.8
Shaobo Yang,Xian Liu,Chenxi Liang,Jiali Li,Yujie Ma,Sijie Kou,Juanli Deng,Bo Chen,Shangwu Fan
The study investigated the hydrothermal corrosion behavior of Y 2 O 3 -Al 2 O 3 -SiO 2 (YAS) and CaO-Y 2 O 3 -Al 2 O 3 -SiO 2 (CYAS) glass interlayers in SiC/SiC composite joints under simulated pressurized water reactor (PWR) conditions and evaluated their effects on mechanical performance. The corrosion rate of the YAS joint was ∼2.7 mg/(cm 2 ·day), primarily due to the rapid dissolution of SiO 2 , which triggered pitting corrosion and void formation. While the Y 2 Si 2 O 7 exhibited good stability, degradation of the glass network caused the hydrolysis of Al species, forming stable AlO(OH) corrosion products. These processes severely damaged the structural integrity, reducing shear strength to ∼6 ± 2 MPa after 15 days, making it unsuitable for application. In contrast, the CYAS joint showed superior corrosion resistance, with a corrosion rate of ∼0.16 mg/(cm 2 ·day), only 2.2% of the YAS joint. The CYAS joint maintained structural integrity and interface bonding. During corrosion, Y 2 Si 2 O 7 crystals formed, while a layer of corrosion intermediates covered and eventually transformed into AlO(OH) particles. After 25 days, shear strength remained at 26 ± 2 MPa, still satisfying service requirements. The hydrothermal corrosion mechanism of YAS-based glasses basically involved the breakdown of the glass network and formation of stable products, including Y 2 Si 2 O 7 and AlO(OH).
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产品关联
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高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Rui Ding,Wenjuan Zhang,Shiva Pandeya,Xueqing Zhu,Kai Xu,Meixing Gui,Hongbing Wang,Ziliang Li,Qianqian Shang,Mahesh Kumar Joshi
The design of a double Z-type heterojunction represents a promising strategy in photocatalysis to achieve superior charge carrier separation, increased light-harvesting capability, and consequently, a higher photocatalytic reaction rate. Herein, a novel ternary heterojunction with direct dual Z-scheme configuration, g-C3N4/In2S3/In2O3 photocatalyst, was synthesized using a chemical bath and facile calcination process. The XRD, SEM-EDS and XPS results confirmed the successful integration of g-C3N4, In2S3, and In2O3 with preserved crystalline phases. Photocatalytic performances of the ternary composite were evaluated via two effective routes, such as methyl orange (MO) degradation and hydrogen (H2) generation, benchmarked against the pristine g-C3N4 and the g-C3N4/In2S3 and In2S3/In2O3 binary composite, revealing that the in-situ growth of In2O3 onto the g-C3N4/In2S3 composite contributed to the remarkable enhancement of their photocatalytic activity. The photodegradation process follows the pseudo-first order reaction kinetics. The ternary g-C3N4/In2O3/In2S3 heterojunction exhibited 94.8% degradation efficiency of MO with a corresponding rate of 23.4×10-3 min-1, 4.8 times higher than the pristine g-C3N4, and excellent photocatalytic activity in five consecutive cycles. Similarly, the g-C3N4/In2S3/In2O3 heterojunction exhibited a rate constant of ~2.4 mmol h−1 g−1 for H2 generation. This superior enhancement was attributed to the dual Z-scheme charge transfer mechanism. The formation of direct dual Z-scheme heterojunction improved the light harvesting, minimized electron hole recombination, and efficiently facilitated the separation of charge carriers. This work provided a mechanistic insight for engineering multifunctional heterojunction for environmental remediation and pollutant mitigation.
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高影响因子
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