Journal of Materials Chemistry C
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2022
·Vol. 10
·期 41
·15451-15457
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IF 8.067
Xi-Zhu Zhang,Wen-Jing Zhu,Zhong-Xi Yang,Yi Feng,Lin-Lin Fan,Guang-Gang Gao,Hong Liu
The sensitive and selective detection of ethylenediamine (EDA) has great significance due to its threat to environment and human health. Herein, a rationally designed polyoxometalate–viologen complex (1) has been demonstrated, in which the viologen molecules are hydrogen bonded to Dawson-type polyoxoanions. When complex 1 is in the atmosphere of EDA, the chromic intensity or Raman signals present proportional response to EDA concentrations. In particular, a very low detection limit of 0.1 ppb can be obtained for 1 based on its Raman signal output, which is the most sensitive complex than the reported EDA sensors. Also, high selectivity is observed for 1 when other amine molecules coexist as interfering compounds. According to the structural analysis and comparative experimental results, the highly sensitive and selective chromic or Raman response can be ascribed to the existence of viologen in the crystal lattice, which can not only accept electrons from EDA but also effectively accelerate the electron transfer to polyoxometalate. This work affords a novel concept for the design of highly sensitive and dual response polyoxometalate-based sensors by virtue of viologen-boosting electron transfer.
研究领域:
材料科学
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环境科学
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化学传感器
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DOI
高影响因子
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
·
2019
·Vol. 93
·期 3
·289-299
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IF 1.429
Li Zhendong,Liu Huijun,Qi Caixia,Yang Aohui,Deng Shanxia
Using ethylenediamine-β-cyclodextrin and α-naphthylacetic acid as raw material, a novel inclusion complex (en-β-CD@NAA) was synthesized. The inclusion complex structures and properties were analyzed by reliable spectroscopic and physicochemical techniques. The stoichiometry of the inclusion complex was 1:1 and the stability constant ( K S ) value was found to be 2511 M −1 at 293 K. Molecular thermodynamic parameters indicated that the spontaneous and exothermic nature of the process. The inclusion form was foreseen by Chem 3D program combined with 1 H-NMR experimental data. The solubilization curves ( K 1 = 2.05) and in-vitro dissolution data demonstrated that the en-β-CD@NAA inclusion complex has satisfactory water solubility.
研究领域:
药物化学
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分子生物学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2017
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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
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2016
·
IF 3.782
Zain-ul-Abdin,Li Wang,Haojie Yu,Muhammad Saleem,Muhammad Akram,Hamad Khalid,Nasir M. Abbasi,Xianpeng Yang
Ferrocene-based derivatives are widely used as ferrocene-based burning rate catalysts (BRCs) for ammonium perchlorate (AP)-based propellant. However, in long storage, small ferrocene-based derivatives migrate to the surface of the propellant, which results in changes in the designed burning parameters and finally causes unstable combustion. To retard the migration of ferrocene-based BRCs in the propellant and to increase the combustion of the solid propellant , zero to third generation ethylene diamine-based ferrocene terminated dendrimers ( 0G , 1G , 2G and 3G ) were synthesized. The synthesis of these dendrimers was confirmed by 1 H NMR and FT-IR spectroscopy. The electrochemical behavior of 0G , 1G , 2G and 3G was investigated by cyclic voltammetry (CV) and the burning rate catalytic activity of 0G , 1G , 2G and 3G on thermal disintegration of AP was examined by thermogravimetry (TG) and differential thermogravimetry (DTG) techniques. Anti-migration studies show that 1G , 2G and 3G exhibit improved anti-migration behavior in the AP-based propellant.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 21
·4694
·
IF 4.967
Ran Yu,Chao Xu,Xiaopei Wu,Honglian Dai
We designed and synthesized the polyoxyethylene diamine (H2N-PEG-NH2) and poly(amide-imide)-polyethylene glycol (PAI-PEG) copolymers. The physical and chemical properties, mechanical properties, and in vitro biocompatibility of the materials were characterized. The results showed that the best elongation at break and recovery were obtained when the amount of PEG was 5 wt%. With the increase in PEG content, the degradation rate, hydrophilic property, tensile strength and tensile modulus of the copolymer decreased to a certain extent. The material had the best thermal stability and mechanical properties when 5 wt% PEG was added. Cytocompatibility evaluation showed that the addition of PEG could enhance the cell compatibility of the material and make it potentially suitable for application in bone repair.Keywords:polyoxyethylene diamine (H2N-PEG-NH2);poly(amide-imide) (PAI);biocompatibility
研究领域:
材料科学
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生物医学工程
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生物材料
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产品关联
DOI
PubMed
高影响因子
DESALINATION
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2022
·
IF 11.211
Shao-Lu Li,Juntao Wang,Yaxu Guan,Junping Miao,Runsha Zhai,Jindi Wu,Yunxia Hu
Membrane fouling is the major obstacle to hinder the extensive application of polyamide thin-film composite reverse osmosis (PA TFC RO) membranes in the water purification and reclamation fields. In this study, a series of hydrophilic and charge-tuned antifouling RO membranes were fabricated by grafting three kinds of small molecules of multi-grade amines N , N -dimethylethylenediamine (DMEDA), (2-aminoethyl) guanidine (AEGu) and (2-aminoethyl)triethylenediamine (AEDABCO) via layer-by-layer interfacial polymerization (LbL-IP). Detailed characterizations revealed that the three tailored membranes presented obviously diminished surface negative charge and reduced PA layer thickness, the water permeability increased by 67.4 %, 34.7 % and 75.6 % compared to the pristine membrane , reached 4.05 L m −2 h −1 bar −1 , 3.26 L m −2 h −1 bar −1 , and 4.28 L m −2 h −1 bar −1 , respectively, meanwhile kept high NaCl rejection > 98.5 %. The dynamic fouling tests indicated that the tailored membranes exhibited much improved antifouling performance towards most of the model organic foulants. Meanwhile the membranes assembled with cationic groups exhibited an enhanced antibacterial property against E. coli . These functional small charged molecules and the convenient modification method provide a valuable pattern for designing antifouling PA TFC RO membranes, which is important for sustainable water purification.
研究领域:
材料科学
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环境工程
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水处理
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产品关联
DOI
高影响因子
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