ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
·
2016
·Vol. 71
·期 8
·869-874
·
IF 0.686
Gao-Feng Wang,Xiao Zhang,Shu-Wen Sun,Hong Sun,Xia Yang,Hui Li,Chen-Zhong Yao,Shu-Gang Sun,Yu-Peng Tang,Li-Xin Meng
Two Mn(II) complexes, {[Mn(BIPMO) 2 Cl 2 ] · 2(H 2 O)} n ( 1 ) and {[Mn(BIPMO) 2 (SCN) 2 ] · 2(CH 3 OH)} n ( 2 ) (BIPMO = bis(4-(1 H -imidazol-1-yl)phenyl)methanone) with V-shaped BIPMO ligands, were synthesized and characterized by IR spectroscopy and elemental analyses along with their single-crystal X-ray diffraction analyses. The Mn(II) ions in 1 and 2 are both six-coordinated to four nitrogen atoms of four BIPMO ligands and two anions (Cl − for 1 , and SCN − for 2 ) to form a distorted octahedral geometry.
✓ 已验证
产品关联
DOI
高影响因子
Food Analytical Methods
·
2017
·Vol. 10
·期 9
·3149-3157
·
IF 2.038
Jing Shasha,Zheng Huijun,Zhao Li,Qu Lingbo,Yu Lanlan
A new sensitive electrochemical sensor based on poly(sodium 4-styrenesulfonate) (PSS) functionalized graphene and Co 3 O 4 nanoparticle clusters (PSS-GN/Co 3 O 4 ) ternary composite was fabricated via two-step synthesis. The PSS-GN/Co 3 O 4 nanocomposite significantly increased the oxidative activity of amaranth due to the individual merit and mutual effect of PSS-GN and Co 3 O 4 nanoparticle clusters which improved the performance of the electrochemical sensor with high sensitivity. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) measurements were used for the detection of amaranth. Under the optimal conditions, the oxidation peak currents of amaranth increased proportionally to the concentration within the range of 0.01–1.0 and 1.0–6.0 μmol L −1 , and the limit of detection was 4.0 nmol L −1 . The proposed modified electrode was highly sensitive and was successfully applied to determine amaranth in the soft drinks with satisfactory recoveries. The as-prepared PSS-GN/Co 3 O 4 /GCE electrochemical sensor offers a feasible way for designing simpler, low cost, and environment-friendly sensors based on Co 3 O 4 nanoparticle clusters.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Jian Lu,Yingying Qin,Qi Zhang,Yilin Wu,Jiuyun Cui,Chunxiang Li,Liang Wang,Yongsheng Yan
High-selective multilayered Li + -imprinted membranes (Li-IIMs) with enhanced hydrophilicity and stability were developed based on polyether sulfone substrate membranes. The multilayered structure was prepared with polydopamine (pDA) as the interfacial adhesion layer, SiO 2 nanoparticles as the hydrophilic layer and Li + -imprinted polymers as the imprinted layer. The selective “Li + -recognition sites” were formed using 12-crown-4 (12C4) as the adsorbing units. The optimal relative selectivity coefficients (α) of Li + /Na + and Li + /K + reached up to 1.85 and 2.07 with the imprinting factor ( β ) of 2.51, and the high permselectivity factors ( γ ) of Na + /Li + (7.39) and K + /Li + (9.86) were achieved on Li-IIMs. The Langmuir isotherm model and the pseudo-second-order kinetics model best fitted the rebinding data of Li-IIMs, as well as the rebinding capacities reached up to 90.3% of initial binding after 5 cycles of adsorption/desorption and just declined to 88.1% after another 5 cycles a month later. Therefore, the as-prepared Li-IIMs would have potential applications for the separation of lithium ions from salt lake brines.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Research Letters
·
2015
·Vol. 10
·期 1
·1-8
·
IF 2.779
Shi Chaohong,Zhu Nengwu,Cao Yanlan,Wu Pingxiao
The development of green procedure for the synthesis of gold nanoparticles (AuNPs) has gained great interest in the field of nanotechnology. Biological synthetic routes are considered to be environmentally benign and cost-effective. In the present study, the feasibility of AuNPs’ synthesis via intracellular protein extract (IPE) of Pycnoporus sanguineus was explored. The characteristics of generated particles of formation, crystalline nature, and morphology and dimension were analyzed by UV-vis spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM), respectively. UV-vis spectra exhibited strong absorption peaks in 520 to 560 nm, indicating the formation of AuNPs. XRD analysis revealed that the formed AuNPs were purely crystalline in nature. TEM observation showed that AuNPs with various shapes including spherical, pseudo-spherical, triangular, truncated triangular, pentagonal, and hexagonal, ranging from several to several hundred nanometers, were synthesized under different conditions. The average size of AuNPs decreased from 61.47 to 29.30 nm as the IPE addition increased from 10 to 80 mL. When the initial gold ion concentration changed from 0.5 to 2.0 mM, the average size rose from 25.88 to 51.99 nm. As in the case of solution pH, the average size was 84.29 nm with solution pH of 2.0, which diminished to 6.07 nm with solution pH of 12.0. Fourier transform infrared (FTIR) analysis implied that the functional groups including hydroxyl, amine, and carboxyl were involved in the reduction of gold ions and stabilization of AuNPs. The catalysis results showed that 0.019 mg of AuNPs with average size of 6.07 nm could catalyze the complete degradation of 12.5 μmol of 4-nitroaniline within 6 min and the degradation rate increased drastically with the addition of AuNPs. All the results suggested that the IPE of P. sanguineus could be potentially applied for the eco-friendly synthesis of AuNPs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale Research Letters
·
2015
·Vol. 10
·期 1
·1-6
·
IF 2.779
Guo Jing,Pei Yingli,Zhou Zhengji,Zhou Wenhui,Kou Dongxing,Wu Sixin
Solution-processed approach for the deposition of Cu 2 ZnSn (S,Se) 4 (CZTSSe) absorbing layer offers a route for fabricating thin film solar cell that is appealing because of simplified and low-cost manufacturing, large-area coverage, and better compatibility with flexible substrates. In this work, we present a simple solution-based approach for simultaneously dissolving the low-cost elemental Cu, Zn, Sn, S, and Se powder, forming a homogeneous CZTSSe precursor solution in a short time. Dense and compact kesterite CZTSSe thin film with high crystallinity and uniform composition was obtained by selenizing the low-temperature annealed spin-coated precursor film. Standard CZTSSe thin film solar cell based on the selenized CZTSSe thin film was fabricated and an efficiency of 6.4 % was achieved.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SYNTHETIC METALS
·
2015
·
IF 2.252
Haihan Zhou,Gaoyi Han,Yaoming Xiao,Yunzhen Chang,Hua-Jin Zhai
Polypyrrole/poly(sodium 4-styrenesulfonate)-carbon nanotubes (PPy/PSS-CNT) nanocomposites have been fabricated with an in situ electrochemically polymerized method. The long (10–30 μm) and short (0.5–2 μm) CNT are incorporated separately into the composites, and their effect on the capacitive performance of composites prepared is compared. Scanning electron microscope characterization reveals that long CNT-incorporated composites (PPy/PSS-lCNT) have the more porous microstructure and present a large amount of CNT within the composites, in which these long tangled CNT form an interconnected conductive nano-network. Furthermore, combining with the transmission electron microscopy characterization, both of the two types of composites show the core–shell nanostructure with PPy layer coated on CNT. The results by electrochemical tests including cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) manifest the PPy/PSS-lCNT composite electrodes have the relatively more superior capacitive behavior and cycle stability than those of the short CNT-incorporated composites (PPy/PSS-sCNT) electrodes. Thereinto, the PPy/PSS-lCNT composite electrodes exhibit a high areal capacitance of 146.1 mF cm −2 at 10 mV s −1 CV scan, retaining 94.0% of the initial capacitance after 5000CV cycles. This comparative study suggests that the long CNT-incorporated PPy/PSS-lCNT nanocomposites are relatively more promising as the electrode materials for the high-performance supercapacitors.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Dingyi Tong,Haifeng Duan,Jiajun Wang,Ziqi Yang,Yingjie Lin
An aggregation-enhanced excimer emission (AEEE) fluorophore was successfully synthesized by introducing chalcone into pyrene. Compared with the traditional AIE structure (tetra-phenylethene derivatives), pyrenylchalcone was more available under mild conditions. It exhibited weak emission when molecularly dissolved but strong excimer emission when aggregated. Then we designed a probe with good water solubility based on pyrenylchalcone for polyanion detection in aqueous media. An orange emission could be observed upon simple addition of polyacrylic acid sodium salt. Better than the other “blue-to-green” pyrene probes, this “turn-on” AEEE probe was more likely visible to eyes. Moreover, unlike the double bond in tetra-phenylethene, the unsaturated double bond in chalcone could be easily opened by thiols. It could lead to another different “turn-on” change in fluorescence. Adding biothiol and adding polyanion were two different methods to reduce the intra-molecular rotations and cause different emissions, thus we built a 2-to-4 molecular decoder in aqueous media which could be observed by naked eyes.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Mingtao Li,Lu Wang,Bolun Yang,Tingting Du,Ying Zhang
The polymer electrolytes based on a novel poly((4-vinylbenzyl)trimethylammonium bis(trifluoromethanesulfonylimide)) polymeric ionic liquid (PIL) as polymer host and containing DEME-TFSI ionic liquid, LiTFSI salt and nano silica are prepared. The polymer electrolyte is chemically stable even at a higher temperature of 60 °C in contact with lithium anode. Particularly, the electrolyte exhibits high lithium ion conductivity, wide electrochemical stability window and good lithium stripping/plating performance. When the IL content reaches 60% (the weight ratio of DEME-TFSI/PIL), the PIL electrolyte presents a higher ionic conductivity, and it is 7.58 × 10 −4 S cm −1 at 60 °C. Preliminary battery tests show that Li/LiFePO 4 cells with the PIL electrolytes are capable to deliver above 130 mAh g −1 at 60 °C with very good capacity retention.
✓ 已验证
DOI
高影响因子
Biomed Research International
·
2013
·
IF 0
Li Lv,Yuanyuan Shen,Min Li,Xiaofen Xu,Mingna Li,Shengrong Guo,Shengtang Huang
A novel 4-arm poly(ethylene glycol)-block-poly(anhydride-esters) amphiphilic copolymer (4-arm PEG-b-PAE) was synthesized by esterization of 4-arm poly(ethylene glycol) and poly(anhydride-esters) which was obtained by melt polycondensation of α-, ω-acetic anhydride terminated poly(L-lactic acid). The obtained 4-arm PEG-b-PAE was characterized by 1H-NMR and gel permeation chromatography. The critical micelle concentration of 4-arm PEG-b-PAE was 2.38 μg/mL. The curcumin-loaded 4-arm PEG-b-PAE micelles were prepared by a solid dispersion method and the drug loading content and encapsulation efficiency of the micelles were 7.0% and 85.2%, respectively. The curcumin-loaded micelles were spherical with a hydrodynamic diameter of 151.9 nm. Curcumin was encapsulated within 4-arm PEG-b-PAE micelles amorphously and released from the micelles, faster in pH 5.0 than pH 7.4, presenting one biphasic drug release pattern with rapid release at the initial stage and slow release later. The hemolysis rate of the curcumin-loaded 4-arm PEG-b-PAE micelles was 3.18%, which was below 5%. The IC50 value of the curcumin-loaded micelles against Hela cells was 10.21 μg/mL, lower than the one of free curcumin (25.90 μg/mL). The cellular uptake of the curcumin-loaded micelles in Hela cell increased in a time-dependent manner. The curcumin-loaded micelles could induce G2/M phase cell cycle arrest and apoptosis of Hela cells.
✓ 已验证
产品关联
DOI
PubMed
MICROCHIMICA ACTA
·
2013
·Vol. 180
·期 11
·1051-1057
·
IF 3.434
Wang Ai-Jun,Guo Han,Zhang Ming,Zhou Dan-Ling,Wang Rui-Zhi,Feng Jiu-Ju
We have developed a simple, sensitive and selective colorimetric method for the detection of cadmium(II) (Cd 2+ ) using gold nanoparticles modified with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole. Organic solvents or additives are not required. It is found that Cd 2+ induces the aggregation of the modified Au-NPs via chelation, leading to a color change from red to blue. This change can be seen with bare eyes, and monitored by UV–vis spectroscopy, transmission electron microscopy and dynamic light scattering. The detection limit is 30 nM (at a signal-to-noise ratio of 3). The new approach was successfully applied to the detection of Cd 2+ in spiked samples of tap water and lake water, and the results agree well with those obtained by flame atomic absorption spectroscopy.
A simple, sensitive and selective colorimetric method was developed for the detection of Cd 2+ , where 4-amino-3-hydrazino-5-mercapto-1,2,4-triazol (AHMT) modified gold nanoparticles (AuNPs) were used as optical probes. The presence of Cd 2+ induced the aggregation of the AHMT-AuNPs through the chelation process. This approach was successfully applied for the detection of Cd 2+ in spiked samples of tap water and lake water.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 33
·13471-13478
·
IF 0
Yunfeng Qiu,Zhuo Ma,PingAn Hu
We report the facile synthesis of environmentally benign Au NPs/chitosan composites and magnetic Au NPs/chitosan/Fe3O4 composites without employing any toxic reductants or capping agents. Renewable natural chitosan not only functioned as supporting matrix, but also served as a reductant and stabilizer for the formation and dispersions of Au NPs. Fe3O4 nanospheres were easily embedded into the chitosan matrix due to the strong complexation ability of chitosan with Fe3O4, which originated from the sharing of the lone electron pairs from the nitrogen atom in amine with FeII or FeIII on the surface of Fe3O4. The as-prepared magnetic composites exhibited much higher activities, as well as more convenient magnetic recyclability than other supported Au NPs towards the reduction of 4-nitrophenol. From the practical point of view, apart from good performance of the reduction of nitro compounds, the biocompatibility and biodegradability of present Au NPs/chitosan/Fe3O4 composites promote the potential applications in the biochemical catalysis or therapy.
✓ 已验证
产品关联
DOI
CHEMICO-BIOLOGICAL INTERACTIONS
·
2014
·
IF 2.982
Zhaoguang Lu,Junsong Wang,Minghui Li,Qingwang Liu,Dandan Wei,Minghua Yang,Lingyi Kong
A goldfish ( Carassius auratus ) model of Parkinson’s disease (PD) was constructed by a single dose of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) according to previously reported methods. Global metabolite changes in brain of the MPTP induced goldfish model of PD were investigated. 1 H NMR-based metabolomics combined with various statistical methods such as orthogonal partial least squares discriminant analysis (OPLS-DA) and two-dimensional statistical total correlation spectroscopy (2D-STOCSY) found significant increase of leucine, isoleucine, valine, alanine, alanylalanine, creatinine, myo -inositol, 18:2 fatty acid, total fatty acids, arachic alcohol, taurine and significant decrease of N-acetylaspartate, (phospho)creatine, (phospho)choline, betaine, glutamine, 3-hexenedioate, acetamide, malonate, isocitrate, scyllo -inositol, phosphatidylcholines, cholesterols, n-3 fatty acids, polyunsaturated fatty acids (PUFAs) in brain of MPTP induced PD goldfish. These disturbed metabolite levels were involved in oxidative stress , energy failure, neuronal cell injury and death, consistent with those observed in clinical PD patients, and rodents and primates model of PD, indicating that the acute MPTP model of goldfish was an ideal and valuable model for PD research. In addition, several unusual metabolites in brain were significantly changed between MPTP induced PD and control goldfish, which might also play an important role in the pathogenesis of PD. This study also demonstrated the applicability and potential of 1 H NMR-based metabolomics approach for evaluation of animal models of disease induced by chemicals, such as MPTP-induced PD goldfish.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）