Nanoscale
·
2022
·Vol. 14
·期 46
·17222-17229
·
IF 8.307
Heng Lu,Xiaohong Tan,Guobin Huang,Shaoru Wu,Yanmei Zhou,Junying Zhang,Qiaowen Zheng,Tianju Chen,Feiming Li,Zhixiong Cai,Jingbin Zeng,Maosheng Zhang
Perovskite nanocrystals (PNCs) have attracted widespread attention as promising materials for the optoelectronic field due to their remarkable photophysical properties and structural tunability. However, their poor stability and the use of toxic organic solvents in the preparation process have severely restricted their practical applications. Herein, a facile, rapid and toxic organic solvent-free synthesis strategy of CsPbBr3 PNCs was developed for the first time via the ligand-assisted reprecipitation (LARP) method using natural deep eutectic solvents (NADESs) as solvents and surface ligands. In this method, the NADESs not only functioned as solvents for green synthesis, but also served simultaneously as surface ligands of CsPbBr3 PNCs to significantly improve their optical properties and stability. The as-synthesized CsPbBr3 PNCs exhibited high photoluminescence quantum yield (PLQY, ∼96.8%), narrow full width at half-maximum (FWHM, ∼18.8 nm) and a high stability that retained 82.9% of PL intensity after 70 days. This work provides a new strategy for the green synthesis of PNCs, which promises feasibility for the industrial large-scale synthesis of high-quality PNCs.
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JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 46
·期 1
·2200671
·
IF 3.614
Zhibo Fu,Hongyang Zhang,Zhijun Zeng,Fanghong Ning,Ziwei Xu,Chenyu Liu,Min Zhang,Ping Hu
Short-chain and medium-chain fatty acids have plentiful biological functions, which play a crucial role in the diagnosis and therapy of many diseases. Herein, a new method for simultaneous quantifying 17 short-chain and medium-chain fatty acids with high-performance liquid chromatography coupled with an ultraviolet detector was developed and the pre-column derivatization by indole-3-acetic acid hydrazide was performed to improve the separation and detection. The conditions of the derivatization reaction were systematically investigated. Subsequently, the method was validated and the results showed a satisfactory linearity (linear regression coefficients > 0.9969), the limit of detection (4.0×10 −3 –1.9×10 −2 μmol/L), precision (0.9%–7.3% for intra-day and 2.0%–9.8% for inter-day), recovery (90.0%–109.1% with relative standard deviation <7.7%) and stability (0.1%–3.3% for standard solution and 0.2%–3.9% for fecal sample). Finally, the established method was successfully applied to quantify short-chain and medium-chain fatty acids in the feces of healthy control and diabetic rats. Eleven kinds of short-chain and medium-chain fatty acids were detected and six of them showed a significant difference between the control group and the model group.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Shi Benbing,Pang Xiao,Li Shunning,Wu Hong,Shen Jianliang,Wang Xiaoyao,Fan Chunyang,Cao Li,Zhu Tianhao,Qiu Ming,Yin Zhuoyu,Kong Yan,Liu Yiqin,Zhang Mingzheng,Liu Yawei,Pan Feng,Jiang Zhongyi
The idea of spatial confinement has gained widespread interest in myriad applications. Especially, the confined short hydrogen-bond (SHB) network could afford an attractive opportunity to enable proton transfer in a nearly barrierless manner, but its practical implementation has been challenging. Herein, we report a SHB network confined on the surface of ionic covalent organic framework (COF) membranes decorated by densely and uniformly distributed hydrophilic ligands. Combined experimental and theoretical evidences have pointed to the confinement of water molecules allocated to each ligand, achieving the local enrichment of hydronium ions and the concomitant formation of SHBs in water-hydronium domains. These overlapped water-hydronium domains create an interconnected SHB network, which yields an unprecedented ultrahigh proton conductivity of 1389 mS cm −1 at 90 °C, 100% relative humidity.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Wen-wen Deng,Xue-ping Mei,Zi-jun Cheng,Tian-xiang gan,Xuan Tian,Jiang-nan Hu,Chuan-ru Zang,Bo Sun,Jing Wu,Yin Deng,Reza. A. Ghiladi,George H. Lorimer,Gizem Keceli,Jun Wang
In order to extract sulforaphane (SFN) from broccoli via green and efficient ways, a novel method based on salting-out assisted deep eutectic solvent (DES) has been developed. Compared to known organic solvent- (such as dichloromethane, ethyl acetate, n -hexane, etc.) based liquid–liquid extraction, this new N 8881 Cl-based DES method exhibited excellent extraction efficiency for SFN, including a significant improvement due to the salting-out effect of KH 2 PO 4 . Under optimal conditions, 97.77 % of SFN was extracted by N 8881 Cl-EG DES and more than 82.5 % of SFN was recovered by activated carbon from DES. In addition, further studies with Kamlet-Taft parameters and density functional theory showed that the H-bond accepting capacity of hydrophobic DES, the existing vdW interaction, and the electrostatic interaction between N 8881 Cl-EG DES all contributed to efficient extraction of SFN. This is the first time that the underlying mechanism for SFN extraction by DES was revealed.
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Nano Research
·
2022
·Vol. 16
·期 3
·4152-4159
·
IF 10.269
Yuan Xiaoqing,Liu Ju,Qin Jingyu,Ma Weili,Liu Guangyong,Wang Yanlei,He Hongyan
Stimuli-responsive materials have important applications in chemistry and chemical engineering. Here, we synthesized five different polyetheramine-fatty acids (PEFA) ionic liquids (ILs), possessing the dual stimuli-responsive ability to temperature and CO 2 . These PEFA ILs have reversible lower critical solution temperature (LCST) phase behavior over a wide temperature range of 37–91 °C, and reversible heterogeneous-homogeneous phase transition towards the addition and removal of CO 2 . Furthermore, the droplet size of the IL—water mixture system increased from 6.5 to 21.0 nm as the temperature increased from 25 to 56 °C, and then recovered to 6.5 nm when the temperature decreased to 25 °C. The addition and removal of CO 2 also reversibly modulated the droplet size of the system. Results from nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectra further showed that the temperature-dependent conformation of polyether amine chain in the cation dominates the temperature response, while the reversible formation of bicarbonate and fatty acids (FA) from CO 2 and anion controls the CO 2 -based reversible phase transition. Molecular simulations revealed a microscopic response mechanism of the IL—water system to temperature and CO 2 , and a synergistic effect between the dual stimuli of temperature and CO 2 . These findings may provide a basis for the rational design and understanding of ILs-based stimuli-responsive materials and nanoreactors.
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JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Yulin Wu,Yixing Wang,Fang Xu,Kai Qu,Liheng Dai,Hongyan Cao,Yongsheng Xia,Linfeng Lei,Kang Huang,Zhi Xu
Covalent organic frameworks (COFs) are porous crystalline polymers with uniform pore channels and excellent stability, holding great promise in the field of membrane. The liquid-liquid interfacial polymerization is designed as an effective and convenient approach to preparing COF membranes, but the crystallinity of membranes synthesized by this method tends to be poor and thus superiorities of COF crystalline channels can hardly be utilized. In this work, a solvent-induced interfacial polymerization strategy was proposed to prepare COF membranes with high crystallinity. Due to the interaction between the acetonitrile solvent inducer and COF network, the reaction and self-assembly in film formation process were effectively manipulated. The optimized COF membrane exhibited much higher crystallinity and porosity, whose surface area was about an order of magnitude higher than the membrane prepared in the traditional system. The highly crystalline COF membrane showed significantly improved separation performance in desalination. This work provides a powerful strategy to prepare COF membranes with high crystallinity.
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ACS Nano
·
2022
·
IF 18.027
Xinda You,Li Cao,Yawei Liu,Hong Wu,Runlai Li,Qianxiang Xiao,Jinqiu Yuan,Runnan Zhang,Chunyang Fan,Xiaoyao Wang,Pengfei Yang,Xiaoyu Yang,Yu Ma,Zhongyi Jiang
Controllable ion transport through nanochannels is crucial for biological and artificial membrane systems. Covalent organic frameworks (COFs) with regular and tunable nanochannels are emerging as an ideal material platform to develop synthetic membranes for ion transport. However, ion exclusion by COF membranes remains challenging because most COF materials have large-sized nanochannels leading to nonselective transport of small ions. Here we develop ionic COF membranes (iCOFMs) to control ion transport through charged framework nanochannels, the interior surfaces of which are covered with arrayed sulfonate groups to render superior charge density. The overlap of an electrical double layer in charged nanochannels blocks the entry of co-ions, narrows their passageways, and concomitantly restrains the permeation of counterions via the charge balance. These highly charged large-sized nanochannels within the iCOFM enable ion exclusion while maintaining intrinsically high water permeability. Our results reveal possibilities for controllable ion transport based on COF membranes for water purification, ionic separation, sensing, and energy conversion.
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ARCHIVES OF MICROBIOLOGY
·
2022
·Vol. 204
·期 8
·1-10
·
IF 2.667
Ye Lin,Wang Jian-Yu,Liu Xiao-Fang,Guan Qi,Dou Nong-Xiao,Li Jian,Zhang Qian,Gao Yan-Ming,Wang Min,Li Jian-She,Zhou Bo
The application of nematicidal microorganisms and their virulence factors provides more opportunities to control root-knot nematodes. Bacillus altitudinis AMCC 1040, previously isolated from suppressive soils, showed significant nematicidal activity, and in this study, nematicidal substances produced by Bacillus altitudinis AMCC 1040 were investigated. The results of the basic properties of active substances showed that these compounds have good thermal stability and passage, are resistant to acidic environment and sensitive to alkaline conditions. Further analysis showed that it is a volatile component. Using HS-SPME-GC/MS, the volatile compounds produced by Bacillus altitudinis AMCC 1040 were identified and grouped into four major categories: ethers, alcohols, ketone, and organic acids, comprising a total of eight molecules. Six of them possess nematicidal activities, including 2,3-butanedione, acetic acid, 2-isopropoxy ethylamine, 3-methylbutyric acid, 2-methylbutyric acid and octanoic acid. Our results further our understanding of the effects of Bacillus altitudinis and its nematicidal metabolites on the management of Meloidogyne incognita and may help in finding less toxic nematicides to control root knot nematodes.
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Sustainable Chemistry and Pharmacy
·
2022
·
IF 5.464
Zhenwei Zhang,Xiaoshi Ma,Chuanjun Yue,Xuejiao Wei,Baoliang Liu,Xiaohui Chen
Hazardous waste alkaline batteries and waste fatty acids significantly threaten the environment. In this study, waste alkaline batteries were simply transferred to r-MnZn catalysts, which were then applied in the ketonization of fatty acids. The assessment results show that r-MnZn can efficiently convert n-octanoic acid to 8-pentadecanone. The conversion and yield are evaluated as 100% and 92.9%, respectively, which are much better than those of TiO 2 , ZrO 2 , CeO 2 and other metal oxides . The excellent catalytic efficiency is derived from the MnO 2 nanorods in r-MnZn materials which are characterized by XRD, TEM, and XPS. In addition, when using different kinds of fatty acids in ketonization, longer carbon chains require a higher activation energy, and the conversion of fatty acids was lower. Furthermore, the ketone products have a short carbon chain that induces side reactions, leading to a low yield. The above results indicate that r-MnZn is an efficient catalyst applied in the ketonization of fatty acids.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Yan Li,Kun Hu,Chao Huang,Yong Hu,Hongwu Ji,Shucheng Liu,Jing Gao
Natural carotenoids have been widely used as colorants and antioxidants in process of food, medicine, and cosmetic. However, the carotenoids have low bioactivity in vivo due to poor water-solubility. To enhance the solubility, stability and antioxidant activity of carotenoids, novel microemulsions (MEs) composed with deep eutectic solvents (DESs), tween 80 and water were developed as alternatives to organic solvents . The phase diagrams and physicochemical properties (viscosity, pH, and diameter) of the DES-based MEs were investigated at different temperatures. Then the solubility distribution, storage stability and DPPH free radical-scavenging activity of three carotenoids (astaxanthin, astaxanthin ester and lutein) in the MEs were evaluated. Compared with ethanol, methanol, and acetone, all the DES-based MEs studied significantly enhanced the solubility of the carotenoids due to the stronger hydrogen bonding and Van der Waals interactions . The highest solubilities of 0.27, 473.63, and 12.50 mg/mL for astaxanthin, astaxanthin ester and lutein , respectively, were observed in the MEs containing DES (DL-menthol:acetic acid = 1:2) at 35 ℃. Moreover, astaxanthin ester can be well preserved in the MEs containing DES (DL-menthol:octanoic acid = 1:2) with a half-life of more than 69 days. In addition, the DPPH scavenging capacities of the three carotenoids in all the MEs were higher than the organic solvents. The results revealed that the DES-based MEs with low viscosity (<0.2 Pa•s) and mild acidic pH (4−5) are potential solvents for natural carotenoids in food processing and storage, medicine making, as well as biomaterials processing .
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Advanced Optical Materials
·
2022
·Vol. 10
·期 16
·2200217
·
IF 10.05
Chuying Wang,Ya-Kun Wang,Ziliang Li,Jingwei Luo,Randy Sabatini,Tao Zhang,Edward H. Sargent,Zhengtao Deng
Recently, metal halide perovskites have attracted considerable interest as highly emissive phosphors for use in white light-emitting diodes (WLEDs). In perovskites, the migration of halide anions between green-emitting bromide (e.g., CsPbBr 3 ) and red-emitting iodide (e.g., CsPbI 3 ) materials is one obstacle to application. Here perovskite WLEDs that do not suffer from the anion exchange problem are reported: this is done by developing green-emitting single-layer sheets of (RNH 3 ) 2 PbI 4 (R = C 18 H 35 –, C 12 H 25 –, and C 8 H 17 –) and uniting these with red-emitting CsPbI 3 perovskite quantum dots (QDs). It relies on self-assembly from ligand-capped CsPbI 3 nanocrystals to form single-layer sheets of (C 18 H 35 NH 3 ) 2 PbI 4 : via judicious selection of alkylamines and alkyl acids, (RNH 3 ) 2 PbI 4 single-layer sheets that exhibit bright and stable green emission with well-defined single-layer thickness are produced. Emission from 505, 512 to 536 nm is tuned and a narrow (<20 nm) linewidth is retained. Perovskite LEDs that produce white light with chromaticity coordinates (0.32, 0.33) and color gamut that reaches 117% National Television System Committee (NTSC) in the International Commission on Illumination (CIE) 1931 color space are demonstrated.
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JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 45
·期 10
·1818-1826
·
IF 3.614
Yinghao Wang,Xianxie Zhang,Wenya Hu,Chenglong Dong,Dali Fu,Sara Girmay Habtegabir,Yehua Han
Free fatty acids are involved in many metabolic regulations in the human body. In this work, an ultra-fast screening method was developed for the analysis of free fatty acids using trapped ion mobility spectrometry coupled with mass spectrometry. Thirty-three free fatty acids possessing different unsaturation degrees and different carbon chain lengths were baseline separated and characterized within milliseconds. Saturated, monounsaturated, and polyunsaturated free fatty acids showed different linearities between collision cross-section values and m/z . The establishment of correlations between structures and collision cross-section values provided additional qualitative information and made it possible to determine free fatty acids which were out of the standards pool but possessed the confirmed linearity. The gas-phase separation made the quantitative analysis reliable and repeatable at a much lower time cost than chromatographic methods. The sensitivity was comparable to and even better than the reported results. The method was validated and applied to profiling free fatty acids in human plasma. Saturated free fatty acids abundance in the fasting state was found to be lower than that in the postprandial state, while unsaturated species abundance was found higher. The method was fast and robust with minimum sample pretreatment, so it was promising in the high-throughput screening of free fatty acids.
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