JOURNAL OF INORGANIC BIOCHEMISTRY
·
2017
·
IF 3.348
Qingchun Zhang,Bo Jin,Zhaotao Shi,Xiaofang Wang,Shan Lei,Xingyan Tang,Hua Liang,Qiangqiang Liu,Mei Gong,Rufang Peng
A new tris(dopamine) derivative, containing three dopamine chelate moieties which were attached to a trimesic acid molecular scaffold , has been prepared and fully characterized by NMR , FTIR and HRMS . The solution thermodynamic stability of the chelator with Fe(III), Mg(II), Zn(II) and Fe(II) ions was investigated. Results demonstrated that the chelator exhibited effective binding ability and improved selectivity to Fe(III) ion. The chelator possessed affinity similar to that of diethylenetriaminepentaacetic acid chelator for Fe(III) ion. The high affinity could be attributed to the favorable geometric arrangement between the chelator and Fe(III) ion coordination preference. The chelator also exhibited high antioxidant activity and nontoxicity to neuron-like rat pheochromocytoma cells. Hence, the chelator could be used as chelating agent for iron overload situations without depleting essential metal ions , such as Mg(II) and Zn(II) ions.
研究领域:
药物化学
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生物无机化学
·
金属离子螯合研究
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DOI
PubMed
高影响因子
ENVIRONMENTAL MICROBIOLOGY
·
2026
·Vol. 28
·期 8
·e70398
·
IF 4
Yanning Tian,Lin Lai,Wenpei Wang,Yinhao Ma,Xing Huang
Ester‐containing pesticides, such as diphenyl ether herbicides, aryloxyphenoxypropionate herbicides, and strobilurin fungicides, are widely applied in agriculture, but their residues pose significant risks to ecosystems. Functional microorganisms can degrade ester‐containing pesticides in the natural environment. However, the microbial mechanisms responsible for their degradation in soils remain unclear. A novel hydrolase gene triS from the strain S113 encoded a broadly active carboxylesterase that hydrolyzes a wide range of ester‐containing pesticides. TriS exhibited a maximum sequence similarity of 34.92% to proteins in the Swiss‐Prot (UniProt) database. Gene redundancy was observed in strain S113, with TriS showing higher catalytic activity than its homologues. The enzyme contains a conserved Ser226‐Glu346‐His456 catalytic triad, and its substrate‐binding pocket can accommodate complex substrates, which contributes to its broad substrate spectrum and enhanced catalytic efficiency. Genomic analyses revealed that triS resides in a conserved locus, whereas related paralogs occupy more variable regions, suggesting potential horizontal dissemination. Bioinformatics‐based taxonomic profiling showed widespread occurrence of TriS homologues, mainly in agricultural soils, and also in forests and wetlands, indicating spread beyond pesticide‐treated fields. This study elucidated the function and distribution pattern of triS , enhancing our understanding of microbial ester‐containing pesticide degradation in the environment. A novel carboxylesterase, TriS, from strain Hansschlegelia zhihuaiae S113 degrades a wide range of ester‐bonded pesticides. Its structural features and widespread presence in both farmlands and natural areas help explain how microbial communities adapt to chemical stress and maintain key detoxification functions in the environment.
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DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 18
·1900256
·
IF 2.622
Majid Basharat,Wei Liu,Shuangkun Zhang,Yasir Abbas,Zhanpeng Wu,Dezhen Wu
Functional photoluminescent materials with a tunable multicolor emission without incorporation of metals is the current focus on luminescent materials due to their multifaceted applications. Herein, novel poly(cyclotriphosphazene-co-tris(4-hydroxyphenyl)ethane) microspheres are synthesized with size distribution of ≈0.8–1.6 µm by reacting hexachlorocyclotriphosphazene and tris(4-hydroxyphenyl)ethane at different molar ratios under facile conditions. The thermogravimetric analysis shows that the microspheres are highly thermally stable with 10% weight loss at around 500 °C. Fluorescence microscopy results show that the microspheres emit three blue, green, and red colors with an emission maximum at 487, 530, and 623 nm under different excitation wavelengths of 365, 420, and 546 nm, respectively. Furthermore, under UV and visible (365 and 420 nm) excitations, microspheres demonstrate extraordinary photobleaching stability and highly intense luminescence for expending time and repeating excitations. The microspheres also demonstrate semiconductor-like optical absorption at 235–285 nm with a tail extended to 700 nm. This exploration provides an insight for the preparation of intrinsic superior wavelength tunable multicolor emission materials from phosphazene. These microspheres are potential candidates for anti-counterfeits, solar cells, full spectrum fluorescence emitters, organic light emitting diodes, biological, catalysis applications and unlock new areas of research on multicolor photoluminescence.
研究领域:
材料科学
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光学
·
化学
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DOI
高影响因子
ANALYST
·
2011
·Vol. 137
·期 3
·588-594
·
IF 3.913
Xiaoquan Lu,Dong liu,Jie Du,Haifeng Wang,Zhonghua Xue,Xiuhui Liu,Xibin Zhou
The novel phenomenon of cathodic electrochemiluminescence on a gold electrode in tris(bipyridine) ruthenium(II) (Ru(bpy)32+) solution is described for the first time. A cathodic electrochemiluminescence (ECL) was found to mainly occur at 0.4–0.8 V with continuous potential scanning from 0.2–1.4 V and the ECL peak was observed around 0.68 V, which was quite different from generally reported Ru(bpy)32+ ECL. Our group speculated that Ru(bpy)32+ possibly reacts with the gold electrode in the acidic phosphate buffer solution (PBS) to generate luminescence. The possible ECL mechanism was discussed according to the presented results. Moreover, it is revealed that the Au as co-reactant in the Ru-system contributed dominantly to the whole ECL . Therefore, the reaction between Ru(bpy)32+ and the newly formed Au implied that the inert metal Au could become a promising material for ECL investigations.
研究领域:
分析化学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Liang Shen,Jian Zuo,Yan Wang
Forward osmosis (FO) has drawn growing attention in recent years, while the lack of desirable FO membranes has been restricting its further development in industrial applications. In this work, a novel tripodal amine — tris(2-aminoethyl)amine (TAEA), with a dual role of catalyst and reactive amine monomer , is incorporated in the PA selective layer for the first time, to in-situ modify the thin-film composite (TFC) membrane. A series of characterization techniques are employed to investigate the modification mechanism involved, as well as changes in chemical properties and the microstructure of the PA layer in terms of the TAEA content and the amine solution pH. The separation performance and anti-fouling behavior of the TAEA-modified TFC membranes are studied correspondingly. In comparison with the control TFC membrane, modified TFC membranes possess higher water permeability, higher salt rejection, and much lower fouling propensity, and may hold a great potential for FO applications.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Feng Cai,Xiang Zuo,Xiao-Min Liu,Long Wang,Wei Zhai,Hui Yang
A series of novel gel polymer electrolytes (GPEs) based on a co-polymer matrix of methoxy-poly(ethylene glycol) methacrylate (MPEGM) and hexadecal-poly(ethylene glycol) methacrylate (HPEGM) are synthesized in this study using non-volatile tris(methoxypolyethyleneglycol) aluminate ester ((MPEG n ) 3 -Al) as the plasticizer. Their thermal stability and ionic conductivity are studied by differential scanning calorimeter, thermogravimetric analysis and alternating current impedance techniques. The results show that all the synthesized GPEs possess excellent thermal stability and exhibit relatively high ionic conductivity. Among all the synthesized GPEs, one with the composition of 40 wt% MPEGM, 10 wt% HPEGM and 50 wt% (MPEG 7 ) 3 -Al exhibits the highest ionic conductivity, up to 0.59 × 10 −3 S cm −1 at 30 °C when the salt concentration is [Li]:[EO] = 1:20. In addition, a coin cell based on this GPE, with LiFePO 4 as cathode and metallic lithium as anode shows discharge capacities as high as 146 mAh g −1 and 151 mAh g −1 when cycled at 30 °C and 50 °C, respectively, under a current rate of 0.1 C.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Zhe Zhai,Kuo Chen,Hao Yang,Yan Huang,Hongling Lan,Xingming Jie,Q. Jason Niu,Yuchao Zhao
Macrocyclic molecules with intramolecular cavities have shown great potential in membrane science. However, the nanofiltration (NF) membranes fabricated by macrocyclic monomers often suffer from inferior ionic rejection due to the commonly formed intermolecular defects among these large molecules. Herein, a patching strategy was employed to fabricate polyarylate-polyamide hybrid NF membrane through interfacial polymerization (IP) by introducing tris(2-aminoethyl)amine (TAEA) with low concentration into Noria solution as the aqueous phase . The polyamide patch could repair the defects of polyarylate film formed by Noria with trimesoyl chloride and endow it with irregularly reticulate morphology. Specially, the Na 2 SO 4 rejection of hybrid NF membrane fabricated with a TAEA doping concentration of 0.03 wt% was improved from 28.1 % to 96.8 %, while it maintained high permeance up to 15.3 L·m −2 ·h −1 ·bar −1 . In order to compare the intrinsic permeability of fabricated polyarylate-polyamide membrane with other state-of-the-art NF membranes reported recently, the separation layer thickness was normalized. Benefitting from the inner cavity of Noria, its permeability was calculated to be 2.85 L·m −2 ·h −1 ·bar −1 ·μm, which was among the most permeable NF membranes. Additionally, the hybrid NF membrane exhibited excellent anti-compression ability and long-term stability. This patching method as a simple and effective strategy would further promote the application of various macrocyclic molecules in membrane science.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2021
·Vol. 28
·期 4
·696-705
·
IF 1.993
Zhimin Fu,Zhanhong Yang,Lie Deng,Yao Rong,Jian Wu
The tris(hydroxymethyl)aminomethane (THAM) and its derivative (DHD 2-([1,3-dihydroxypropan-2-ylidene]amino)-2-(hydroxymethyl)propane-1,3-diol) have been used as organic thermal stabilizers for flexible poly(vinyl chloride) (PVC). According to dehydrochlorination and discoloration tests conducted at 180°C, THAM showed to be an excellent organic thermal stabilizer for flexible PVC, not only THAM stabilizer improved the thermal stability of PVC but also maintained the initial color of the PVC. The induction time and the thermal stability time were 52 and 55.5 min, respectively. DHD can also be used as an organic thermal stabilizer for flexible PVC; however, its thermal stabilizing efficiency was not satisfactory, but it has a good synergistic effect with traditional cadmium–zinc soap stabilizers. Besides, the experiments had been performed to investigate pentaerythritol (PER) and THAM, two substances with similar structure, but such a huge difference in thermal stabilizing efficiency for flexible PVC. THAM did improve the thermal stability of PVC, both in initial whiteness and long-term thermal stability. But PER has no thermal stabilizing efficiency for PVC when used alone. At the end of the article, the probable mechanism which can give an explanation for the stabilizing efficiency given by the THAM has been proposed.
研究领域:
材料科学
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高分子化学
·
热工程
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Jingwen Feng,Jinjuan Gao,Wen Yang,Yaru Li,Jian Shi,Cong Liu,Mingshun Jiang,Shouzhen Jiang
Two-dimensional (2D) metal–organic frameworks (MOFs) have promising applications in surface plasmon resonance (SPR) sensing for their intriguing exciton migration and visible light-near infrared absorption properties. In this study, an effective biosensing structure comprising 2D Cu-TCPP MOF nanosheet-capsulated Au film was developed, such that lower molecular-weight dopamine with small changes of refractive index can be identified on the fiber-optic platform. The large areas of ultrathin 2D Cu-TCPP MOF nanosheets were well prepared, the experimental results indicated that the sensitivity (48%) and figure of merit (18%) were increased notably compared with the bare Au film. Moreover, the finite element method was adopted to numerically analyze and verify the excellent charge-transfer ability of MOF nanosheets and the bidirectional gain properties between MOF nanosheets and Au films. Furthermore, the sensitivity [1.24 nm/log(M)] and selectivity of the dopamine were significantly enhanced with a low limit of detection of 1.50 × 10–13 M and linear response with a wide range of concentrations from 5 × 10–12 M to 5 × 10–7 M through ssDNA surface modification and conformation amplification. As revealed by the above-mentioned results, the Cu-TCPP/Au/SMF biosensor can serve as a promising nanoplatform for clinical diagnosis and medical assessment.
研究领域:
材料科学
·
生物医学工程
·
光学传感
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 63
·51392-51398
·
IF 3.84
Jia-Ping Lai,Yue Zuo,Hui Sun,Ying Yu
The hydrophilic molecularly imprinted microspheres (HMIMs) functionalized with amino and carboxyl groups have been synthesized successfully using human hemoglobin as a template. The obtained HMIMs have been characterized using scanning electron microscopy (SEM), adsorption isotherms, dynamic binding as well as quartz crystal microbalance (QCM). The rebinding results indicate that the HMIMs exhibit highly selective recognition properties towards target human hemoglobin in Tris–HCl aqueous solution with an imprinting factor of 1.90 and a high binding capacity of 98 mg g−1. The QCM characterization results also demonstrate that the HMIMs coated electrode shows a more sensitive response to hemoglobin than that of a non-imprinted microspheres coated electrode.
研究领域:
材料科学
·
分析化学
·
生物化学
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DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Fang-Nan Wu,Jian Zhu,Guo-Jun Weng,Jian-Jun Li,Jun-Wu Zhao
In this work, a tyrosine-decorated gold nanocluster (Tyr-GNC)–cerium(III) complex was established for the fluorescent detection of dopamine (DA). Tris–HCl buffer was used for synthesizing Tyr-GNC; thus, Tyr-GNC could emit fluorescence even under neutral conditions. The quantum yield (QY) of Tyr-GNC was 13.3%. Trivalent cerium ions (Ce3+) chelated hydroxyl and amino groups of tyrosine to form GNC–Ce3+. Also, DA showed a higher quenching efficiency in the fluorescence of GNC–Ce3+ than that of GNC. The mechanism was that Ce3+ chelated with DA and promoted its oxidative self-aggregation under alkaline buffer, and, at the same time, the oxidative product quenched the fluorescence of Tyr-GNC by the inner filter effect (IFE). In DA detection, GNC–Ce3+ showed a wide detection range (0.1–1000 μM) and a low detection limit (10.85 nM) for DA with high selectivity. The platform was successfully applied to DA detection in human plasma. This work proposed insight into the interaction between GNC–Ce3+ and DA, which has broad application prospects in clinical diagnosis.
研究领域:
纳米技术
·
分析化学
·
生物医学工程
·
临床诊断
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DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2023
·
IF 2.8
Zheng Li,Jing Wang,Xiaoxia Peng,Yu Chen,Mengyuan Geng
Hydrogen sulfide plays an essential roles in physiological and pathophysiological process. It is still a challenge to design a simple and reasonable H 2 S-specfic fluorescent probe. Herein, we develop a simple reaction-based fluorescent probe for detecting H 2 S in DMF/Tris-HCl buffer system. Fluorescence emission spectra were used to investigate the recognition performance of probe L towards hydrogen sulfide. The results shown that probe L has a specific recognition towards hydrogen sulfide over other tested metal cations and anions with a rapid response. The probe L combined with H 2 S in a 1: 1 manner with a detection limit of 0.372 μM. The appropriate pH range for detecting H 2 S was 4 ∼ 8. The proposed recognition mechanism was studied by fluorescence titration spectrum, Job’s plot, 1 H NMR titration experiment and mass spectrometry analysis. Moreover, probe L was applied in real water samples, test strips and fluorescent films to detect H 2 S successfully.
研究领域:
分析化学
·
生物化学
·
环境科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）