JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Qi Zhang,Siru Ren,Chenming Gu,Ang Li,Song Xue
This work presents, for the first time, a systematic and step-by-step methodology on how to improve the enantioseparation performance of tartaric acid (TT) in capillary electrophoresis (CE) using ionic liquid (IL) technology. A series of chiral and achiral ILs were applied in different separation modes to evaluate their influence on TT's enantioselectivity . Unlike previous ILs-related chiral CE studies, which typically report positive synergistic effect, in this work, negative synergistic effect was observed between TT and most chiral ILs (including several amino acids ILs and a saccharide-based IL). Instead, achiral ILs (the precursors of chiral ILs, mainly tetraalkylammonium hydroxides) exhibited significantly better performance in system modifications when used in combination with TT. The influence of the configuration of TT and chiral ILs on enantioseparation was investigated to explore the synergistic mechanism. The result showed that the existence of the chiral part of the ILs may cause interference rather than facilitation in the selector-selectand interactions. On the basis of the above results, we further designed a novel TT-based IL-type chiral selector, di-tetramethylammonium-D-tartrate ((TMA) 2 -D-TT). It is able to achieve excellent enantioseparation of all model analytes without adding any other chiral or achiral additives. This study demonstrates that TTs, which have almost been abandoned in chiral CE, are still able to provide satisfactory enantioselectivities with the help of ILs. In some application modes, e.g., under the achiral ILs modification or using TT-based ILs, their chiral separation performance is comparable or even superior to the well-established and widely used TT ester-type chiral selectors
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2023
·Vol. 140
·期 47
·e54707
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IF 3
Xue Dong,Mengfei Long,Yongchao Cai,Zhemin Zhou,Xiaole Xia
Phthalate plasticizers were typical petroleum-based plasticizers whose application was affected by their negative tendency to be transformed into more risky metabolites such as phthalic acid mono-2-ethylhexyl ester (MEHP), which might not be conducive to sustainable development and human health. Therefore, the development of green bio-based plasticizers was an urgent need. Here, a new class of green bio-based plasticizer 2,3-diacetyl tartrate dialkyl esters (DATAE-C n ) was synthesized by using renewable tartaric acid (TA) as the main raw material, and its structure was characterized by FTIR and 1 H NMR. The plasticizing properties of different plasticized poly(vinyl chloride) (PVC) films were investigated, compared with commercial plasticizers (DEHP and ATBC). The results indicated that PVC films plasticized with the DATAE-C n displayed apparently increased thermal stability, plasticizing effect, toughness and migration stability. The addition of DATAE-C n minimized the T g value of PVC from 88.5 to 38.5°C suggesting that the plasticizer had obvious plasticizing effect on PVC. Moreover, when DATAE-C n completely replaced the usage of DEHP on PVC, its initial decomposition temperature ( T i ) was increased by up to about 34°C. In particular, PVC/DATAE-C n exhibited prominent migration resistance in different solvent environments, which was received by solubility parameters analysis, leaching and volatilization tests. These results indicated that green bio-based plasticizer DATAE-C n had potential to replace phthalate plasticizers.
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 12
·2770-2777
·
IF 7
Shanhao Hao,Cheng Fu,Lin Zhou,Zhanghong Guo,Qijun Song
Iridium nanoparticles with an average size of 1.7 nm (Tar-IrNPs) were synthesized by the reduction of IrCl3 with NaBH4 in the presence of tartaric acid. As prepared Tar-IrNPs showed not only oxidase, peroxidase and catalase activities but also exhibited unprecedented laccase-like activity, which can catalyze the oxidation of the substrates o-phenylenediamine (OPD) and p-phenylenediamine (PPD) accompanied by significant color changes. The superb catalytic performance is evidenced by the fact that Tar-IrNPs can achieve better laccase-like activity with only 2.5% of the dosage of natural laccase. Furthermore, they also exhibited superior thermal stability and broader pH adaptability (2.0–11) over that of natural laccase. Tar-IrNPs can retain more than 60% of their initial activity at 90 °C, while the natural laccase has totally lost its activity at 70 °C. At a prolonged reaction time, the oxidation products of OPD and PPD can form precipitates due to oxidation induced polymerization. Thus Tar-IrNPs have been successfully used for the determination and degradation of PPD and OPD.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zhuojun Jiang,Zidan Zhang,Benzheng Xia,Shuyao Xiong,Liangrong Yang,Zheng Li
The separation of boron isotopes poses significant challenges due to their similar chemical properties. Previous studies have demonstrated that boron isotope separation can be achieved by solvent extraction of boric acid (H 3 BO 3 ) using trioctylamine (TOA) and tartaric acid (DL-TA), resulting in a remarkable separation factor of up to 1.04 through chemical exchange. However, the coordination mechanism among these three compounds remains elusive, impeding our understanding of the isotope exchange process. In this study, the species in the aqueous and organic phases were investigated using extraction experiments (maximum loading method), alongside various characterization techniques (FT-IR, 11 B NMR, and high-resolution ESI-MS), followed by DFT computations. The results showed that H 3 BO 3 and DL-TA formed anionic complexes in the aqueous phase with stoichiometric ratios of 1:1 and 1:2, respectively. However, the stoichiometric ratios became more intricate in the organic phase, encompassing 1:1, 1:2, 2:2, 2:3, and 3:3. The average stoichiometric ratio of H 3 BO 3 to DL-TA calculated within the range of 1:1 to 1:1.5. Protonated TOA could form ion pairs with these anionic complexes, while unprotonated TOA might form hydrogen bonds with the carboxyl groups in DL-TA, contributing to the complexity of the stoichiometric ratios between H 3 BO 3 and TOA. The DFT calculations indicated that all complexes containing B (4) –O bonds, including 1:1, 1:2, 2:2, 2:3, and 3:3, effectively facilitated the exchange of isotopes with H 3 BO 3 . These findings pave the way to process optimization of boron isotope separation by solvent extraction of boric acid.
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Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Manqing Yan,Mingchen Zhou,Jing Chen,Tianlei Zhao,Longxiang Tang,Hong Bi
In this paper, the environment-friendly, water-soluble carbon dots (CDs) with stable photoluminescence (PL) have been prepared via the one-step pyrolysis of lotus leaf. Then the as-prepared CDs containing abundant hydroxylic and carboxylic groups were employed as cocatalyst with tartaric acid (TA) in ring-opening polymerization (ROP) of ε-caprolactone (ε-CL). The low-toxic organic acid TA, as main catalyst, was used to catalyze the ROP of ε-CL efficiently. The fluorescent CDs@PCL hybrids were obviously hydrophobic and they exhibited an excellent biocompatibility, and biodegradability due to the existence of PCL. Therefore the hydrophobic, biodegradable and multi-color fluorescent CDs@PCL hybrids may have potential applications in biomedicine, photocatalyst, bioimaging, and environmental analysis. Furthermore the application of CDs in catalyzing and initiating polymerization reaction will exemplify the versatility of CDs in the most unexpected fields.
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PubMed
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 29
·3660-3665
·
IF 2.073
Ke Si,Chenfang Sun,Shanshan Cheng,Yong Wang,Wenping Hu
Tartaric acid (2,3-dihydroxybutanedioic acid, TA) is one of the major organic acids with a wide range of applications in industry and life. To detect various types of TA, we examined the use of three kinds of cyclodextrin (CD) based reduced graphene oxide (RGO) materials (RGO-CDs) as electrode materials for electrochemical enantiorecognition. Graphene oxide (GO) was prepared via a modified Hummers' method and reduced with hydrazine hydrate to afford RGO, where CDs (α-, β-, and γ-CD) were added in the reduction process affording the desired RGO-CD composites followed by characterization with thermogravimetric analysis (TGA), Raman spectroscopy (Raman), and X-ray diffraction analysis (XRD). RGO-CD modified electrochemical sensors were fabricated thereafter by coating the prepared RGO-CDs on a glassy carbon electrode (GCE) with methylene blue (MB) as the indicator and applied for the enantiorecognition of model racemic analytes via cyclic voltammetry (CV) analyses. The good linear relationship between the current difference and analyte concentration as well as the single isomer percentage indicates that the as-prepared sensors have great potential for chiral resolution.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
L.Z. Pei,T. Wei,N. Lin,C.G. Fan,Zao Yang
Aluminium bismuthate nanorods had been synthesized by a facile hydrothemral method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations showed that the lengh and diameter were 2–10 μm and 50–200 nm, respectively. X-ray diffraction (XRD) and high-resolution TEM (HRTEM) showed that the nanorods were composed of single crystalline orthorhombic Al 4 Bi 2 O 9 phase. The aluminium bismuthate nanorods could be explained by the nucleation and crystalline growth process based on the products obtained from different hydrothermal conditions. Aluminium bismuthate nanorods modified glassy carbon electrode (GCE) was fabricated for the electrochemical detection of tartaric acid (TA) in neutral solution. A pair of semi-reversible redox peaks located at −0.08 V and −0.53 V, respectively were observed. The current intensity of the cyclic voltammogram (CV) peak increased linearly obviously with increasing the scan rate and TA concentration. The detection limit and linear range were 0.64 μM and 0.001–2 mM, respectively with the correlation coefficient of 0.995. The aluminium bismuthate nanorods modified GCE had good reproducibility and stability for the detection of TA.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Zhonghao Li,Dan Li,Wenting Du,Yinuo Du,Guang Yang
Herein, fluorescent polymer dots (T-PDs) with excellent properties were synthesized through a facile magnetic stirring method using carboxymethyl cellulose derivative (CMC-NH 2 ) and tartaric acid (TA). The synthesized T-PDs exhibit a nanoscale structure, excellent stability and good fluorescence behavior with a fluorescence quantum yield of 12.5 %. Moreover, the T-PDs can be selected for the design of sensors for detecting Fe 3+ via the internal filtration effect (IFE) through a fluorescence quenching process. A good linear equation can be fitted between (F 0 -F/F 0 ) and the amount of Fe 3+ from 0 to 600 μM (R 2 = 0.998) and the detection limit (LOD) for Fe 3+ was determined to be 0.74 μM (3σ/slope). Additionally, the as-prepared sensing platform can be utilized for detecting Fe 3+ in real samples, which indicates its great potential for application in sensing. Interestingly, the fluorescence of the quenched system can be partially recovered by the addition L-cysteine. Thus, a fluorescent “ON-OFF-ON” switch can be designed, and a resettable and multireadout logic gate operation can be realized.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hao Peng,Jing Guo,Guixuan Jin,Jingjing Wang,Qiuyan Wu,Hongwei Liu,Aiyang Li
This study investigated the effectiveness of tartaric acid (TA) for the direct reduction of pentavalent vanadium (V(V)), a critical process in vanadium-related industries. Leveraging TA's carboxyl groups, which showed promise as reducing agents for V(V), the research systematically evaluated the effects of key parameters including reaction temperature, reaction time, H 2 SO 4 concentration, and TA dosage on reduction efficiency. Response surface methodology (RSM) analyzed parameter significance and interactions, while density functional theory (DFT) elucidated the molecular reduction mechanism. The process was further validated using an industrially sourced vanadium-rich solution. Results demonstrated that TA effectively reduces V(V) under elevated temperatures and TA dosage, achieving 100% within a short time under optimized conditions. RSM revealed all parameters positively influenced the reduction process, ranked by significance as: reaction temperature > reaction time > H 2 SO 4 concentration > TA dosage, underscoring the dominance of thermal activation. DFT analysis identified the molecular mechanism: the carbon atom within TA's carboxyl group (-COOH) donated lone pair electrons to V(V), facilitating reduction to V(IV). Successful application to the industrial vanadium solution confirmed TA's effectiveness. This study established TA as an efficient V(V) reducing agent, clarified its electron-transfer mechanism, and confirmed its dual role as both reductant and complexing agent.
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JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 8
·1-10
·
IF 2.426
Han Shuo,Peng Yanyan,Tao Shengyun,Hu Ying,Lan Tianqi,Hu Chengkang,Cao Jing
In this work, a kind of chiral helical polymer PDTDH of 9,9-dipropynylfluorene skeleton structure were prepared. The structure and chiral properties of the obtained polymer were characterized by Nuclear Magnetic Resonance (NMR) and Circular Dichroism (CD) Spectroscopy. These chiral PDTDH polymers were used to fabricate chiral sensors and to investigate the enantioselective recognition of D−/L- tartaric acid enatiomer. The results indicated that the (S)-PDTDH/GCE sensor showed obvious response toward the tested tartaric acid enantiomer, which was confirmed by two parameters: Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) tests. These findings expand the scope for the application of chiral polymer as electrode modification material in the electrochemical chiral recognition field.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Zhonghao Wan,Yuqing Sun,Daniel C.W. Tsang,Zibo Xu,Eakalak Khan,Shou-Heng Liu,Xinde Cao
Metal-biochar composite is considered as a promising alternative for future carbocatalysis in environmental decontamination. Nevertheless, unavoidable metal leaching impedes its scaling-up application and remains an environmental concern in the present scientific progress. Herein, a hierarchical Fe biochar (Fe/CBC) derived from cellulose was fabricated via a hydrothermal carbonization coupled with microwave irradiation and NH 3 activation. Several exterior organic electron shuttles ( i.e. , ascorbic acid, oxalic acid, tartaric acid, and hydroquinone) were accommodated onto Fe/CBC to introduce more electroactive functionalities ( i.e. , C–O and C = O). In particular, comprehensive material characterization was performed to elaborate the physicochemical properties of tartaric acid-treated biochar catalyst (Fe/CBC-TA). Synergies of inherent hierarchical structure, well-developed carbon π-electron network, and accommodated electron shuttle could mitigate the Fe leaching from 2.44 to 0.578 mg L −1 in the peroxymonosulfate (PMS) activation system for catalytic degradation of bisphenol A. Based on the results of scavenging experiments and electron paramagnetic resonance (EPR) analysis, the catalytic mechanisms transformed from a one-phase pathway (mainly • OH) for the Fe/CBC system to a two-phase pathway (first phase: 1 O 2 ; second phase: • OH) for the Fe/CBC-TA system. The increased activation energy and improved catalyst recyclability of the Fe/CBC-TA in the redox reaction further pinpointed its environmental sustainability. Overall, this work offers new strategies to fabricate efficient metal-biochar catalyst and insights into its sustainable electrocatalysis.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xinge Miao,Pengxin Yu,Mingzhi Du,Yongsheng Yuan,Jianyu Han,Jingen Long,Lingzhao Kong,Junju Mu,Weiran Yang
Herein, a new method to selectively convert tartaric acid to succinic acid was developed by catalytic transfer hydrogenation using iodine as the catalyst and methyl isobutyl ketone (MIBK) as both the hydrogen donor and the solvent. Under optimized reaction conditions, 85% succinic acid can be obtained directly from tartaric acid with a catalytic amount of iodine in MIBK at 160 °C for 4 h. Moreover, succinic acid can automatically precipitate out from the reaction solvent after cooling due to its much lower solubility in MIBK at room temperature, which provides an easy way for product separation. The detailed mechanism has been studied extensively by control experiments. The cheap catalyst, mild reaction condition, and easy separation of the product make this process a green path for succinic acid production.
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