SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Kaiqi Liu,Luminita Marin,Xinjian Cheng
In this work, fluorescent β- cyclodextrin (β-CD) based probes containing naphthalimide group were synthesized to realize the specific recognition of Hg 2+ /Hg + in aqueous system. Firstly, three small fluorescent molecules (N1, N2 and N3) with -NH 2 groups were synthesized from 4-bromo-1, 8-naphthalene anhydride . Secondly, CH CCH 2 - group was introduced into β-CD by Williamson ether formation reaction. Finally, the target probes (β-CD-PI, β-CD-PY and β-CD-TP) were obtained by Amino-Yne click reaction. These probes can efficiently recognize Hg 2+ /Hg + . β-CD-PI emits bright yellow fluorescence after binding with Hg 2+ /Hg + , which is a turn-on fluorescent probe . When the Hg 2+ /Hg + concentration exceeds 26 μM, the fluorescence intensity amplifies sharply (20 folds). The hydrophobic parts of the probes aggregated together to form a micelle-like structure due to complexation with Hg 2+ /Hg + , resulting in special micelle-sensitizing properties. Meanwhile, the HOMO-LUMO energy levels of the probes were calculated by cyclic voltammetry (CV). The probe is expected to be used for the detection of Hg 2+ /Hg + in aqueous solutions without any organic solvents.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Hongyuan Zhao,Gan Zhu,Fang Li,Yunhang Liu,Meimei Guo,Lin Zhou,Runqiang Liu,Sridhar Komarneni
A novel and economical approach was proposed for synthesizing the β-cyclodextrin (β-CD) embellished ginkgo nut-derived porous carbon (GNDPC) with three-dimensional (3D) interconnected honeycomb-like morphology, which was employed to decorate the glassy carbon electrode (GCE) for the construction of methyl parathion (MP) electrochemical sensor (GNDPC@β-CD/GCE) for the first time. GNDPC with higher surface area possessed good adsorptive capacity and superior conductive property because of 3D interconnected honeycomb-like porous carbon network. β-CD improved the dispersibility of GNDPC and enhanced the molecular recognition and accumulation capability of GNDPC towards MP. The synergetic cooperation of β-CD and GNDPC realized the ultrasensitive detection property of MP (Limit of detection: 4.52 nM; Concentration: 0.005–15 μM). The constructed GNDPC@ β-CD/GCE displayed good MP determination feasibility in apple and pear juices (Recovery rate: 95.8–100.1%; Relative standard deviation: 2.12–4.17). This work exhibits a novel approach for the sensitive determination of MP in foods.
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JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Wenhui Li,Yu Huang,Yuqian Xiang,Xiaohui Yan,Yanshuo Li,Dapeng Wu
In this work, the vacuum-assisted thermal bonding method was proposed for the covalent coupling of β-cyclodextrin (β-CD) (CD-CSP), hexamethylene diisocyanate cross-linked β-CD (HDI-CSP) and 3, 5-dimethylphenyl isocyanate modified β-CD (DMPI-CSP) onto the isocyanate silane modified silica gel. Under vacuum conditions, the side reaction due to the water residue from the organic solvent, air, reaction vessels and silica gel could be avoided, and the optimal temperature and time of vacuum-assisted thermal bonding method were determined as 160°C and 3 h. These three CSPs were characterized by FT-IR, TGA, elemental analysis and the nitrogen adsorption-desorption isotherms. The surface coverage of CD-CSP and HDI-CSP on silica gel was determined as ∼0.2 μmol m −2 , respectively. The chromatographic performances of these three CSPs were systematically evaluated by separating 7 flavanones, 9 triazoles and 6 chiral alcohols enantiomers under the reversed-phase condition. It was found that the chiral resolution ability of CD-CSP, HDI-CSP and DMPI-CSP was complementary to each other. Among them, CD-CSP could separate all 7 flavanones enantiomers with the resolution of 1.09–2.48. HDI-CSP had a good separation performance for triazoles enantiomers with one chiral center. DMPI-CSP showed excellent separation performance for chiral alcohol enantiomers, among which the resolution of trans-1, 3-diphenyl-2-propen-1-ol reached 12.01. Generally, the vacuum-assisted thermal bonding had been demonstrated as a direct and efficient method for the preparation of chiral stationary phases of β-CD and its derivatives.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Ziqi Zhao,Shaokun Liang,Chengjun Kang,Zhaoqiang Zhang,Liqin Zhou,Zhenxia Zhao,Xingzhen Qin,Yushan Pang,Hongbing Ji,Kungang Chai
Adsorption is considered as a promising method to purify the mixed acetophenone (AP) and 1-phenylethanol (1-PE) that are generally difficult to separate. Many efforts have been made to improve the preferential uptake of AP over 1-PE in aqueous phase, but there exists a practical bottleneck associated with their limited aqueous solubility. Herein, we demonstrate unprecedented reversal of selectivity in the organic medium enabled by β-ketoenamine-linked covalent organic frameworks (COFs), which were fabricated successfully by polycondensation between 1,3,5-triformylphloroglucinol (Tp) and diamines. The dependence of selective adsorption ability toward 1-PE on pore size was firstly investigated experimentally, indicating that TpBZ-COF with moderate pore size outperformed other analogues. The adsorption behaviors of 1-PE and AP onto TpBZ-COF were examined systematically. The evaluation results revealed a strong affinity toward 1-PE versus AP as well as excellent stability in recycling experiments. Further, the dynamic breakthrough experiments confirmed the practical application potential and remarkable recyclability. To probe the mechanism and structure–activity relationship, an imine-linked COF possessing similar porous structure was used as a reference for comparison of separation performance both experimentally and theoretically. The occurrence of hydrogen bonding between the hydroxyl of 1-PE and β-ketoenamine-linkage as H-bond acceptor in suitable pore spaces endows TpBZ-COF a fantastic candidate for purifying 1-PE and AP from petrochemical by-products.
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Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Yang Yu,Baojing Zhang,Xiaoping Cai,Zhejian Cao,Farid Akhtar,Xinyang Jiao,Xueding Chai,Peizhong Feng
Ni–Al–Cr alloys in the β phase (B2–NiAl) region exhibit remarkable stability and mechanical property. Through thermal explosion (TE) reaction, Ni–Al–Cr intermetallic compounds with high porosity can be obtained. In this study, the focus lies on analyzing the macroscopic morphology, microstructure, phase distribution, TE behaviour, and the mechanical property of porous Ni–Al–Cr in the β phase region. Following the TE reaction, the Al-rich sintered product demonstrates a uniform phase composition and high porosity, reaching 44.39%. The vigorous TE reaction promotes the formation of interconnected pores, while the high porosity structure compromises the mechanical properties of the sample. Conversely, the Al-poor sintered product, due to a moderate TE reaction and low porosity structure, maintains its complete morphology and exhibits excellent compression resistance (yield stress reaching 538 MPa). This study offers valuable insights for the fabrication of porous Ni–Al–Cr materials with exceptional structure and performance.
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FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Yue Huang,Jianan Liu,Zhaolun Li,Zechen Cao,Hongshun Hao,Jingran Bi,Hongman Hou,Hongyan Wu,Gongliang Zhang
To effectively utilize the potent antibacterial capacity of benzyl isothiocyanate (BITC), attempts have been made to apply it in the natural biopolymeric film by solving its high volatility. In this study, we encapsulated BITC in the carrier β-cyclodextrin (βCD) to form an inclusion complex to protect BITC from volatilization and then introduced the complex to κ-carrageenan (KC) to fabricate an antibacterial food packaging film. The addition of the BITC-βCD complex enhanced the storage modulus and promoted a denser network structure formation for KC hydrogel by rheological measurements and microstructure observations, respectively. In terms of antibacterial capacity, BITC-βCD-KC film displayed favorable antibacterial potential against both Staphylococcus aureus and Listeria monocytogenes after co-incubation for 18 h, with the inhibition zone diameters of 25.7 mm and 16.7 mm, respectively. As an active packing material, the BITC-βCD-KC film exhibited a sustained inhibition effect against the proliferation of these two bacteria on the chicken meat surface at 25 °C. Moreover, the chicken breasts packaged with BITC-βCD-KC film had a total viable count of 4.7 Log CFU/g, obviously lower than that of the unpackaged sample (9.8 Log CFU/g) after storage at 4 °C for 8 days. These results suggested that the KC film with the BITC-βCD inclusion complex might have promising potential as an antibacterial food packaging material for food preservation.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Wei Chen,Tao Zhou,Diankuan Gu,Ya He,Ziheng Zhang,Jiangyang Tian,Fan Fu
The photo-Fenton reaction has been widely applied in the decontamination of organic pollutants and has shown great potential in environmental remediation. The development of an appropriate catalyst with high activity and stability is essential for its success. Therefore, a composite catalyst was synthesized by in-situ mineralization of β-FeOOH nanorods on carbonized cellulose fabric (CCF) coated with polydopamine (PDA), which was denoted as β-FeOOH/PDA/CCF. The β-FeOOH/PDA/CCF catalyst with more than 77% degradation efficiency towards various contaminants and exhibited excellent chemical stability after six consecutive adsorption/degradation cycles. Radical scavenger experiments and electron paramagnetic resonance spectroscopy confirmed the presence of hydroxyl radicals (∙OH) that play a crucial role in the photo-Fenton degradation process. In addition, the degradation mechanism and pathway of MB was inferred. This work provides new perspectives on developing catalysts that demonstrate high stability and accelerated electron transfer, which can enhance the application of the photo-Fenton process in practical wastewater purification.
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Liling Wang,Jin Wang,Yanbin Wang,Yuchuan Qin,Yifeng Zhou
A green, simple and catalyst-free ionic liquid@β-cyclodextrin-reduced grapheme oxide-multiwall carbon nanotubes (IL@β-CD-rGO-MWCNTs) was synthesized by hydrothermal reduction and chemical crosslinking without the protection of inert gases and the assistance of energy fields. With the characteristics of large specific surface area, good thermal stability, superior porous structure and rich functional groups, IL@β-CD-rGO-MWCNTs can be used as an effective adsorbent to rapidly remove bentazon from aqueous environments. Under optimal conditions (pH 6.0, solid–liquid ratio of 2:1 and no salt), the maximum adsorption capacity ( q m ) of IL@β-CD-rGO-MWCNTs to bentazon was 125.00 mg g −1 as corroborated by the Langmuir isotherm model at 40 °C, higher than that of the most commonly used bentazon adsorbent. Many molecular interactions, such as hydrogen bonding and π/π-π interaction, determine its adsorption capacity and selectivity. The adsorption kinetics and isotherm fit well with the pseudo-second-order kinetic model and Langmuir model, and the effective eluting adsorbent can be reused after treatment. The proposed strategy not only provides a valuable reference for the efficient synthesis of IL@β-CD-rGO-MWCNTs, but also provides a new strategy and ideas for the adsorption and removal of pollutants in water environments.
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DESALINATION
·
2023
·
IF 9.9
Yunze Zhao,Huifang Xing,Meng Rong,Zheng Li,Xuetuan Wei,Congmei Chen,Huizhou Liu,Liangrong Yang
The lithium extraction from emerging unconventional oil and gas (UOG) field brine by β -diketone synergic system was established and systematically studied for the first time. A synergistic system consisting of dibenzoylmethane (DBM) and trioctylphosphine oxide (TOPO) was screened for lithium extraction through high-precise DFT calculation, and the synergistic effects were revealed by FT-IR analysis. A state-of-the-art Li + -Mg 2+ -Ca 2+ co-extraction and Li + selective stripping (CESS) process was proposed to achieve high lithium recovery efficiency. The effects of saponification, phase ratio, extractant composition and stripping acidity on extraction efficiency were systemically studied using real UOG field brine. After three-stage countercurrent extraction, the lithium extraction efficiency reached 98.1 % with the DBM concentration of 0.25 mol/L, TOPO concentration of 0.25 mol/L, and saponification of 70 %. After selective stripping and scrubbing with gradient HCl concentrations, Li + was further separated from Na + , Mg 2+ and Ca 2+ . The mass ratio of Mg 2+ /Li + was reduced by 49.7 times, Na + /Li + was reduced by 102.4 times. This work bridged the gap in the solvent extraction of lithium resources from UOG field brines and provided ideas for UOG field resource exploit and comprehensive utilization.
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npj Science of Food
·
2023
·Vol. 7
·期 1
·1-10
·
IF 6.4
Qiu Chao,Zhang Zhiheng,Li Xiaojing,Sang Shangyuan,McClements David Julian,Chen Long,Long Jie,Jiao Aiquan,Xu Xueming,Jin Zhengyu
In this study, composite nanoparticles consisting of zein and hydroxypropyl beta-cyclodextrin were prepared using a combined antisolvent co-precipitation/electrostatic interaction method. The effects of calcium ion concentration on the stability of the composite nanoparticles containing both curcumin and quercetin were investigated. Moreover, the stability and bioactivity of the quercetin and curcumin were characterized before and after encapsulation. Fluorescence spectroscopy, Fourier Transform infrared spectroscopy, and X-ray diffraction analyses indicated that electrostatic interactions, hydrogen bonding, and hydrophobic interactions were the main driving forces for the formation of the composite nanoparticles. The addition of calcium ions promoted crosslinking of the proteins and affected the stability of the protein–cyclodextrin composite particles through electrostatic screening and binding effects. The addition of calcium ions to the composite particles improved the encapsulation efficiency, antioxidant activity, and stability of the curcumin and quercetin. However, there was an optimum calcium ion concentration (2.0 mM) that provided the best encapsulation and protective effects on the nutraceuticals. The calcium crosslinked composite particles were shown to maintain good stability under different pH and simulated gastrointestinal digestion conditions. These results suggest that zein–cyclodextrin composite nanoparticles may be useful plant-based colloidal delivery systems for hydrophobic bio-active agents.
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高影响因子
ANALYST
·
2022
·Vol. 147
·期 20
·4553-4561
·
IF 5.227
Binfen Zhao,Yuxuan Wang,Jiutong Ma,Qiong Jia
A hydrophilic interaction chromatography (HILIC) strategy is considered as an efficient strategy for efficient glycopeptide enrichment. Here, a novel hydrophilic material (denoted as magCDP@Ada-MSA) was constructed through host–guest interaction between crosslinked β-cyclodextrin (β-CD) polymers and mercaptosuccinic acid (MSA) derived adamantane. On the one hand, crosslinked β-CD polymers have great hydrophilicity due to their abundant hydrophilic hydroxyl groups. On the other hand, the hydrophilic functional molecule MSA was introduced into crosslinked β-CD polymers through host–guest interaction for further hydrophilic modification of the material. Hydroxyl groups in crosslinked β-CD polymers and carboxyl groups in MSA together endow the material with excellent hydrophilicity and good affinity toward glycopeptides. The prepared hydrophilic material demonstrated rapid magnetic separation (within 5 s) and reusability (at least 10 cycles). Thanks to the above advantages, magCDP@Ada-MSA showed satisfactory performance for the specific enrichment of glycopeptides (selectivity, 1 : 500 molar ratios of HRP/BSA and sensitivity, 0.1 fmol μL−1). Moreover, magCDP@Ada-MSA was successfully applied for selective glycopeptide enrichment from complex biological samples (human serum and saliva).
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CHIRALITY
·
2022
·Vol. 35
·期 1
·58-66
·
IF 2.183
Haibo You,Ben Chen,Liqun Fang,Tingting Lin,Ping Xu,Chu Chu,Shengqiang Tong
Carboxymethyl-β-cyclodextrins (CM-β-CDs) with five kinds of degrees of substitution were synthesized and characterized. Analytical enantioseparation of six basic drugs containing N-alkyl groups, including pheniramine, chlorpheniramine, labetalol, propranolol, venlafaxine, and trans-paroxol, was achieved by reversed-phase high-performance liquid chromatography (RP-HPLC) using the synthesized CM-β-CD as chiral mobile phase additives. Key influence factors were optimized, including organic modifier, pH value, CM-β-CD with different degrees of substitution, and concentration of CM-β-CD. The mobile phase was composed of methanol and 10 mmol L −1 of phosphate buffer pH 4.0 containing 10 mmol L −1 of CM-β-CD. Peak resolution for six racemic drugs was gradually increased with an increasing degree of substitution of the synthesized CM-β-CD. The stoichiometric ratio and binding constants for the inclusion complex formed by CM-β-CD and enantiomer were determined, which showed that the stoichiometric ratio for each inclusion complex was 1:1.
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