JOURNAL OF FLUORESCENCE
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2021
·Vol. 31
·期 4
·1125-1132
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IF 2.217
Wu Chuqiao,Lin Xin,Wang Qianming
The new design strategy will provide the possibility for preparing a dynamic sensor by employing the inhibition of C = N isomerization. In this work, the functional probe 4-(1 H-imidazo [4,5-f] [1,10]-phenanthrolin-2-yl) benzaldehyde oxime (compound 4 ) has been synthesized and such molecule gives rise to blue emission. Due to the incorporation of hypochlorite, the oxime group can be oxidized to the structure of aldehyde. As a result, the molecular motif exhibits sharp emission change from blue to green due to the addition of hypochlorite with enough sensitivity and selectivity (detection limit = 53 nM, linear range 0.5-8.0 µM). It has also been used for monitoring ClO − by employing solution color change and the absorption signal difference could effectively rule out the effects of interference species. To our knowledge, it will be the first case of a highly selective hypochlorite sensor derived from oxime isomerization reaction based on phenanthroline backbone.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Wenxiu Jiang,Xuejun Yu,Yuan Hui,Bowei Shen,Zhang Farong,Zhiquan Pan,Hong Zhou
Diosgenin is an important intermediate of steroid hormone drugs, green production of diosgenin with high yield is a key research issue. In this study, a convenient, efficient, and eco-friendly approach was developed to produce diosgenin from saponins in D. zingiberensis C. H. Wright (Curcuma longa L) using a magnetic solid acid. Fe 3 O 4 @SiO 2 -Pr-S-SO 3 H is a heterogeneous catalyst and was obtained by loading 3-(mercaptopropyl) trimethoxysilane on the surface of Fe 3 O 4 @SiO 2 , followed by sulfonation with chlorosulfonic acid. The magnetic solid acid catalyst was fully characterized by Fourier Transform-Infrared (FT-IR) spectra, thermo gravimetric analysis (TGA), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and X-ray photoelectron spectroscopy (XPS), scanning electron microscope(SEM), transmission electron microscope (TEM), NH 3 -TPD, elemental mapping analysis. The effects of single factors, such as the solid acid mass, alcoholysis temperature, extraction time, and solvent volume on the diosgenin yield were analyzed. The extraction parameters for diosgenin were optimized by response surface methodology (RSM). The optimized values for the solid acid mass, solvent volume, extraction time, and temperature were 0.22 g, 7.8 mL, 7.4 h, and 100 °C, respectively. Under the optimized conditions, the maximum yield of diosgenin was 19.15 %. The solid acid reported in this work exhibited higher catalytic activity at a smaller dosage than traditional sulfuric acid and other solid acids. The alcoholysis products were identified by high-performance liquid chromatography-mass spectrometry (HPLC-MS). Alcoholysis catalysed by an as-prepared magnetic solid acid is clearly superior in terms of catalytic activity, dosage, and reusability. It is a promising strategy for the green production of diosgenin.
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Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-16
·
IF 12.264
Zhang Shucong,Wang Wenbin,Hu Feilong,Mi Yan,Wang Shuzhe,Liu Youwen,Ai Xiaomeng,Fang Jiakun,Li Huiqiao,Zhai Tianyou
The 2D CoOOH sheet-encapsulated Ni 2 P into tubular arrays electrocatalytic system with expediting mass transport, structural stability, and tuned electron was conceptually proposed.
The designed electrocatalysts realize expectant 1000 mA cm −2 -level-current-density hydrogen evolution in neutral water for over 100 h.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2019
·
IF 4.191
Xiaoyun Li,Jiaxin Yang,Rui Xu,Lefu Lu,Fangong Kong,Min Liang,Lijie Jiang,Shuangxi Nie,Chuanling Si
The production of platform chemicals from lignocellulosic biomass is scientifically valuable but technologically challenging. With the aim to establish a green reaction system for the production of furfural from lignocellulosic biomass, in the current work, H-SAPO-34 was investigated for catalysis of the conversion of Eucalyptus sawdust to furfural in γ-valerolactone (GVL). H-SAPO-34 was prepared and characterized by XRD, SEM, FTIR, BET, TGA and ammonia adsorbed FTIR. H-SAPO-34 possesses Brønsted and Lewis acid sites and a large specific surface area. The average pore diameter of H-SAPO-34 was 0.86 nm, which is beneficial for the spread of xylose and furfural and the inhibition of humin production. In this work, a peak furfural yield of 99.28% from Eucalyptus was achieved at 210 °C in 120 min with 30 g/L H-SAPO-34. The Brønsted/Lewis acid bifunctionality and the solvent effect of γ-valerolactone possibly contributed to the high furfural yield from real biomass. The kinetics of the conversion of Eucalyptus sawdust to furfural was also studied, and the activation energy for furfural production was calculated. Additionally, the catalytic activity and stability of the regenerated catalyst were estimated.
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Regenerative Biomaterials
·
2014
·Vol. 1
·期 1
·27-35
·
IF 0
Cai Teng-Teng,Lei Qi,Yang Bin,Jia Hui-Zhen,Cheng Hong,Liu Li-Han,Zeng Xuan,Feng Jun,Zhuo Ren-Xi,Zhang Xian-Zheng
A novel Uralic (U)-rich linear-hyperbranched mono-methoxy poly (ethylene glycol)-hyperbranched polyglycerol-graft-Uralic (mPEG-HPG-g-U) nanoparticle (NP) was prepared as drug carrier for antitumor methotrexate (MTX). Due to the H-bond interaction of U with MTX and hydrophobic interaction, this NP exhibited high drug loading efficiency of up to 40%, which was significantly higher than that of traditional NPs based on U-absent copolymers (<15%). In addition, MTX-loaded mPEG-HPG-g-U NPs also demonstrated an acidity-accelerated drug release behavior.
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CRYSTENGCOMM
·
2015
·Vol. 17
·期 19
·3677-3686
·
IF 4.034
Guohai Xu,Min Xie,Xiaokang Li,Wenjie Shi,Hui Yu,Yinhui Hu,Xiaochen Xun,Yongrong Xie
In this work, crystal engineering is focused on the self-assembly of 2D 63 topology into different supramolecular networks using unit–unit H-bonds. Four related coordination polymers, [Zn2(teaH2)(ndc)1.5]·MeOH (1), [Co2(teaH2)(ndc)1.5]·MeOH (2), [Zn2(deaH)(ndc)1.5]·MeOH (3) and [Co2(teaH2)(btb)]·3EtOH (4) where ndc2− = 2,6-naphthalenedicarboxylate, btb3− = benzene-1,3,5-tribenzoate, teaH3 = triethanolamine, and deaH2 = diethanolamine, contain a well-known 63 subnet and the binuclear units. Furthermore, their 63 nets present different hexagonal windows (chair- or ship-shaped) and diversified layer arrays (ABAB or ABCABC sequence). The 63 subnet and symmetry-related unit–unit H-bonds as supramolecular synthons can build up different supramolecular networks. Compounds 1 and 2 show a distorted diamond supramolecular network due to formation of a square-pyramidal node. Because the formation of a seesaw-shaped node, compound 3 features a general diamond supramolecular network with 3-fold interpenetration. Compound 4 exhibits a binodal supramolecular framework in that H-bonding interactions occur between three binuclear units. In addition, the diversified layer array has endowed compound 4 with a large 1D channel, which can be characterized by standard N2 adsorptions. Compound 4 has a type I adsorption isotherm with an appreciable adsorption of 45.04 cm3 g−1 at 0.40 P/P0, whereas 1–3 do not exhibit appreciable N2 uptake.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 52
·2411183
·
IF 18.5
Song Yin,Xuewei Jiao,Xudong Liu,Mingxuan Liu,Bingshun Xu,Na Li,Yonghao Lu,Shaopeng Yang,Weiguang Kong
The role of MA in FAMA mixed perovskite remains far from being fully understood, due to the intricate chemical evolutions in the precursor solutions. Adjusting the content of MA in FAMA mixed perovskite arbitrarily remains a great challenge. This study elucidates a synergistic effect between H + and I − oxidation which helps to reduce the content of MA in FA-dominated perovskite. Briefly, excessive H + boosts the balanced and rapid assembly of MA and FA components in FA-dominated perovskite and hampers unfavorable chemical evolution induced by nucleophilic reaction between MA and FA in the precursor solution, while I − oxidation accelerates the in situ crystallization of perovskite. Leveraging this synergistic effect, centimeter-scaled FA x MA (1-x) PbI 3 single crystals with arbitrarily adjustable values of x are successfully fabricated. In addition, peroxyacetic acid is introduced as the additive, enabling the blade-coated FA 0.9 MA 0.1 PbI 3 perovskite solar cells (PSCs) to achieve an impressive efficiency of 23.7%. The efficiency achieved here is among the highest values for blade-coated PSCs with FA content exceeding 90% so far. The optimized solution developed in this study achieved exceptional stability, allowing it to be stored under air conditions for over 2 months without significant degradation in cell efficiency. This outcome satisfies the requirements for commercialization.
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JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2024
·
IF 2.8
Xijin Yang,Ying Li,Qiju Shao,Zhirong Li,Zeli Chun,Yan Wang,Yaping Zhou,Rongxiang Chen
Persicaria chinensis (L.) H. Gross ( P. chinensis ), also known as “Huotanmu” in Chinese, is a traditional ethnic herbal medicine and a functional food ingredient. In this study, liquid chromatography − electrochemical detection (LC-ECD) screening, liquid chromatography − tandem mass spectrometry (LC-MS/MS) identification, and multivariate statistical analysis were combined to clarify the antioxidant components in P. chinensis . The samples were extracted using 80 % aqueous methanol under ultrasound-assisted extraction and their in vitro antioxidant activities were evaluated. The fingerprint of P. chinensis was established using LC-ECD, while the identification of major chemical components was performed using LC-MS/MS through comparison of ion fragments. Subsequently, grey correlation analysis and partial least squares regression analysis were used to investigate the association of different compounds with antioxidant activity. P. chinensis from different sources showed excellent DPPH radical scavenging capacity, ABTS radical scavenging capacity, and ferric reducing antioxidant power. A total of 25 common peaks were obtained and identified in the LC-ECD fingerprint of P. chinensis , which were primarily comprised of tannins and flavonoids. The similarity between samples of different batches was ≥ 0.767, indicating relatively consistent quality. The comprehensive analysis results of grey relational analysis and partial least squares regression analysis indicated that tannins such as di-galloyl-HHDP-hexoside and davidiin were the major contributors to the antioxidant activity of P. chinensis . Therefore, LC-ECD can rapidly screen the potential phenolic antioxidants of P. chinensis , providing a basis for its product development, resource utilization, and quality control.
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Environmental Science-Nano
·
2025
·
IF 5.1
Lu Wang,Siyuan Zhang,Jukun Xiong,Meicheng Wen
Formaldehyde (HCHO), a prevalent indoor volatile organic compound, poses significant health risks to humans even at very low concentrations. As a result, its efficient degradation at room temperature is of utmost importance. However, the detailed mechanism for catalytic oxidation of formaldehyde remains unclear, particularly regarding the role of water vapor, which has been subject to considerable debate. In this study, we synthesized Pt-supported TiO2 glass fiber catalysts (Pt/TiO2 GF) via NaBH4 reduction to investigate the reaction pathways and clarify the influence of water vapor on the oxidation process. The reaction mechanism and intermediates were systematically studied at room temperature using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), kinetic isotope effect (KIE) analysis, and density functional theory (DFT) calculations. Results revealed a clear reaction pathway of HCHO → DOM → HCOO− → CO2, with formate C–H bond cleavage (HCOO−* + O* → CO2 + OH*) identified as the rate-determining step. Both experimental KIE results and theoretical calculations confirmed that water vapor substantially reduces the activation barrier for this step, significantly promoting formate decomposition and subsequent CO2 formation. This work provides critical insights into the role of water in enhancing formaldehyde oxidation and offers theoretical support for developing efficient catalysts suitable for humid environments.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Chuqiang Que,Hongwei Zhu,Chang Liu,Ziang Qiang,Chen Xu,Minjie Li,Jia Liu,Jing Cao,Pengjian Zuo,Jing Wang,Xin Yang
With the rapid expansion of textile printing and aquaculture industries, efficient dye wastewater treatment is urgently needed. Here, magnetic sulfonic acid-functionalized covalent organic frameworks (Fe 3 O 4 @TpBD-SO 3 H COFs) were synthesized via a functional defect strategy using 4-aminobenzene-1,3-disulfonic acid (ADSA) as a competing monomer, generating periodic and sulfonate-rich nano adsorbent. Adsorption experiments involving malachite green (MG) and crystal violet (CV) in single and binary systems, supported by adsorption model fitting, indicated multimolecular adsorption through non-parallel molecular orientations. In binary adsorption system, MG enhanced CV adsorption (synergistic effect), whereas CV suppressed MG adsorption (antagonistic effect). Dynamic competitive adsorption tests suggested that adsorption configuration transitions between single and binary systems influenced this co-adsorption phenomenon. Incorporating Fe 3 O 4 magnetic cores rendered Fe 3 O 4 @TpBD-SO 3 H COFs highly hydrophilic, achieving excellent adsorption capacities for MG (1010.6 mg/g) and other cationic dyes, while minimally adsorbing anionic dyes. Moreover, the material exhibited strong resistance to interference from metal salts and maintained stable adsorption performance after ten regeneration cycles. Successful purification of real wastewater samples further demonstrates its practical potential for selective cationic dye removal from complex aqueous systems.
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高影响因子
RARE METALS
·
2025
·
IF 11
Zheng Hao-Yuan,Jin Chen,Che Hang,Lee Chia-Tse,Liu Guang,Wang Li,Zhao Yu-Yuan,Liu Hai-Zhen,Wang Xin-Hua,Yu Yi-Feng,Yan Mi
The Li–Mg–N–H (Mg(NH 2 ) 2 –2LiH) system, as a high-capacity Mg-based metal hydrogen storage material (5.6 wt%), has broad prospects for in vehicle hydrogen storage applications, but it still has high hydrogen ab/desorption barriers. To improve its hydrogen storage performance, a nanohydrogen storage alloy was innovatively combined with Mg(NH 2 ) 2 –2LiH, AB5 type nanohydrogen storage alloy LaNi 5 was prepared by co-precipitation method. Nano LaNi 5 and single-walled carbon nanotubes (SWCNTs) were co-doped into the Mg(NH 2 ) 2 –2LiH system at a ratio of 10 wt% and 2 wt%, significantly enhancing the hydrogen storage performance of Mg(NH 2 ) 2 –2LiH. The initial hydrogen ab/desorption temperatures of the co-doped system decreased from 110/130 °C to 45/85 °C. The release of by-product ammonia is significantly inhibited. 4.73 wt% H 2 can be ab/desorption in 150 min at 180/170 °C. Cycle tests show that the co-doped system can still maintain a hydrogen storage capacity of 4.75 wt% after ten hydrogen release cycles. Mechanism and density functional theory study have shown that during the hydrogen release process, partially hydrogenated LaNi 5 weakens the chemical bonding in Mg(NH 2 ) 2 , promoted the dissociation of hydrogen from the Mg(NH 2 ) 2 –2LiH system, while playing a dual role of "hydrogen overflow" and "hydrogen pump". SWCNTs act as auxiliary agents, helping to refine particle size and increase thermal conductivity. The synergistic effect of the two optimizes the comprehensive hydrogen storage performance of Mg(NH 2 ) 2 –2LiH. This study provides a new research method for improving the comprehensive hydrogen storage performance of Mg-based metal hydrogen storage materials using rare earth element catalysts. Graphical abstract
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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
·
2024
·
IF 6.4
Junhui Fan,Dahai Zhu,Yifan Li,Changqing Liu,Huaqing Xie,Wei Yu
Thermal interface materials (TIMs) play a crucial role in addressing the heat dissipation challenges associated with high-power electrical equipment. Apart from possessing excellent thermal conductivity, and they must also exhibit low contact thermal resistance to facilitate efficient heat transfer at the interface. In this study, a novel composite with a dual-network structure was prepared by interfacial grafting to achieve superior thermal conductivity. The composite comprises polydimethylsiloxane (PDMS), functionalized boron nitride ( f -BN), and liquid metal (LM). This dual network structure effectively enhances phonon transportation and significantly improves the thermal transport performance of the composite. The thermal conductivity of the obtained composite can achieve 4.4 W/m·K, accompanied by a low contact thermal resistance of 0.32 °C·cm 2 /W. Furthermore, the dual network structure ensures the flexibility of the composite, as evidenced by the maximum elongation reaching 267.43% at a tensile strength of 0.35 MPa. This exceptional mechanical performance is expected to alleviate stress concentration issues arising from thermal expansion mismatch, thereby enhancing the practical applicability of the prepared TIMs. Overall, this study introduces a novel approach for fabricating flexible composites with high thermal conductivity and low contact thermal resistance, offering new insights into the preparation of TIMs.
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