RSC Advances
·
2016
·Vol. 6
·期 13
·10266-10271
·
IF 3.289
Xueyi Sun,Yu Wang,Xiahe Deng,Junfang Zhang,Zhao Zhang
A new carbazole derivative 2-[(1E)-2-[6-(benzothiazolyl)-9-ethyl-9H-(carbazol-3-yl)]-ethenyl]-3-methyl-benzothiazolium iodide (BCB) was synthesized and its anion sensing properties were studied. BCB acts as an efficient colorimetric and ratiometric fluorescent probe used for the detection of cyanide ions in an aqueous solution even in the presence of other anions such as F−, AcO−, H2PO4−, SO42−, SO32−, S2−, SCN−, Cl−, Br−, I−, N3−, ClO4−, NO2−, HCO3− and CO32−. The cyanide addition to the benzothiazolium group induces an obstruction of the intramolecular charge transfer (ICT) and produces a dramatic hypsochromic shift in the absorption (152 nm) and emission (165 nm) profiles of BCB. The change in color of the solution was prominent and could be easily observed by the naked eye. The BCB probe forms a 1 : 1 adduct with CN− with a detection limit of 0.09 μM. The probe was successfully applied for the detection of CN− in natural water samples as well as in live HeLa cells.
研究领域:
分析化学
·
生物化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2016
·
IF 2.848
Ke Zhou,Yaochi Liu,Zhaoguang Yang,Houzhi Liu,Ting Xie
A novel bio-based oxidized polymeric material PAO-CIO was prepared, characterized and evaluated for its sorption toward U(VI) from aqueous solution. PAO-CIO was prepared using Cyclosorus interruptus as a novel supporter, which oxidized by sodium periodate and sodium chlorite, obtaining the oxidized particles, then surface-modified by γ-methacryloxypropyl trimethoxysilane, followed by a graft polymerization reaction and an amidoximation reaction. The SEM, TEM, XPS, FT-IR and XRD were used to characterize the adsorbent. Langmuir, Freundlich and Temkin models were appropriate for fitting the equilibrium data. According to the Langmuir model, the maximum sorption capacity (420.2 mg/g) was achieved with pH 5.0, temperature 50 °C. The sorption process was insensitive to the interference of other ions. A mixture desorption solution containing 5% NaCl (w/v) and 5% of HCl (v/v) could regenerate the U(VI)-loaded PAO-CIO completely. The sorption capacity only reduced 7.61% after six cycles compared to that of the fresh PAO-CIO. Therefore, PAO-CIO could serve as a cost-effective, efficient and novel adsorbent for U(VI) removal from aqueous solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Hui Ma,Dan Luo,Qi Zhao,Rui Liu,Zhenzhou Zhang,Xianglin Hou,Xiaohuan Sun,Yingxiong Wang
Diffusion-ordered spectroscopy (DOSY) is a powerful and efficient technique for the analysis of complex mixtures, relying on their differential in self-diffusion coefficient. However, DOSY is often struggled to separate signals pertaining to isomeric species, especially positional isomers. Here, for the first time, we describe the novel design of 18-crown ether-6 (18C6) and 18C6/K + complex as matrixes to discriminate and identify positional isomeric mixtures of phenylenediamine, nitroaniline, phthalic acid, dimethoxybenzoic acid, aminophthalic acid and even amino acids using 1 H DOSY spectrum. The superior performance of 18C6 and 18C6/K + complex as matrix depends on that they can interact with different components with varying binding energy as demonstrated by MMMF calculations and the DFT calculation. The methodology presented here is simple yet efficient. Moreover, the crown ether and crown ether/K + complex provide the dual mode discrimination for both amino and carboxylic substituted positional isomers.
研究领域:
分析化学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS
·
2021
·
IF 2.348
Zenan Zhao,Simin Cao,Haoyang Li,Dong Li,Yanping He,Xin Wang,Jinquan Chen,Sanjun Zhang,Jianhua Xu,Jay R. Knutson
Thiazole orange (TO), an asymmetric cyanine dye , has been widely used in biomolecular detection and imaging of DNA/ RNA in gels, due to its unique fluorogenic behavior: fluorescence of free dye in aqueous solution is very weak, but emission can be significantly enhanced in nucleic-acid-bound dye. Herein we describe the ultrafast excited-state dynamics of free TO in aqueous solution by exploiting both a femtosecond upconversion spectrophotofluorometer and a picosecond time-correlated single-photon counting (TCSPC) apparatus. For the first time, the fluorescence lifetime of TO monomer in water was found to be ∼1 ps, mixed with concurrent solvent relaxation (which was confirmed by the experimental results of TO in DMSO). Even at moderate TO concentration, this lifetime has an amplitude (a measure of molecular fraction) that significantly dominates other lifetimes, and this is the origin of weak steady state fluorescence of free TO in water. We also found a novel slower decay component around 34 ps. Interestingly and in addition, the lifetime component on the 30–40 ps timescale was also found in TO-γ-Cyclodextrin (CD) complexes. The fraction of this component increased with the addition of γ-CD. Cyclodextrin has been reported to promote the aggregation of TO. Thus, although a very coincidental match of this time constant by one for a torsional process within the cavity can not be ruled out, we ascribe the shared 30–40 ps component to the lifetime of a highly quenched TO dimer experiencing intra-and inter-molecular rearrangement.
研究领域:
生物物理学
·
光化学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2022
·Vol. 7
·期 8
·e202104176
·
IF 2.307
Zefeng Zhao,Xukun Qian,Hailin Zhu,Yigao Miao,Hua Ye
Graphical The stability of accordion-like Ti 3 CN MXene in aqueous solutions, ethanol and N , N -dimethylformamide has been investigated. It is revealed Ti 3 CN exhibits limited stability in the aqueous solutions, and transforms to anatase TiO 2 nanoparticles in pH=1 and 7 solutions, and amorphous TiO 2 nanowires in pH=14 solution after a 7-day test at 25 °C. This transformation accelerates when the testing temperature increased to 80 °C. Meanwhile, Ti 3 CN shows excellent stability in ethanol and N , N -dimethylformamide after a 7-day test. MXene materials have shown promising applications in selective separation membranes and many other fields. However, their structural stability which is critically important to applications in the presence of aqueous solutions and organic solvents remains largely unexplored. In this work, we have conducted a systematic study on the synthesis of accordion-like Ti 3 CN MXene and its stability in aqueous solutions, ethanol and N , N -dimethylformamide (DMF). Based on the XRD, SEM and TEM results, 20 % HF acid and an etching time of 24 h is regarded as the optimal parameter to synthesize accordion-like Ti 3 CN MXene. Ti 3 CN MXene exhibits limited stability in the aqueous solutions. Ti 3 CN MXene partially transforms to anatase TiO 2 nanoparticles in pH=1 and 7 aqueous solutions, and amorphous TiO 2 nanowires in pH=14 aqueous solution after a 7-day test at 25 °C. When the testing temperature is increased to 80 °C, this structure transformation rate is increased remarkably. Meanwhile, Ti 3 CN MXene shows excellent stability in C 2 H 5 OH and DMF up to 7-day at 25 and 80 °C, respectively. It is believed that these findings are helpful for guiding the controllable synthesis of Ti 3 CN MXene and seeking the potential applications in the presence of aqueous solutions, ethanol and DMF.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2022
·Vol. 11
·期 14
·2114
·
IF 5.561
Yuanhao Zhou,Bingyu Zhao,Lingxuan Wang,Ting Li,Hong Ye,Shuangyang Li,Mingquan Huang,Xianren Zhang
Ethanol has great effects on the adsorption of phthalate acid esters (PAEs) on activated carbon (AC), which are usually overlooked and hardly studied. This study investigated the overlooked effects of ethanol on the adsorption of PAEs in alcoholic solutions. The adsorption capacities of dibutyl phthalate (DBP) on AC in solutions with ethanol contents of 30, 50, 70, and 100 v% were only 59%, 43%, 19%, and 10% of that (16.39 mg/g) in water, respectively. The ethanol content increase from 50 v% to 100 v% worsened the adsorption performances significantly with the formation of water–ethanol–DBP clusters (decreasing from 13.99 mg/g to 2.34 mg/g). The molecular dynamics simulation showed that the DBP tended to be distributed farther away from the AC when the ethanol content increased from 0 v% to 100 v% (the average distribution distance increased from 5.25 Å to 15.3 Å). The PAEs with shorter chains were more affected by the presence of ethanol than those with longer chains. Taking DBP as an example, the adsorption capacity of AC in ethanol (0.41 mg/g) is only 2.2% of that in water (18.21 mg/g). The application results in actual Baijiu samples showed that the adsorption of PAEs on AC had important effects on the Baijiu flavors.Keywords:activated carbon;adsorption;phthalate acid esters;alcohol–water solutions;application
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2022
·Vol. 59
·期 5
·424-432
·
IF 1.058
Xue-Li Liu,Yi-Fan Chen,Yi-Wen Chen,Wei-Kang Peng,Han-Chun Liu
A new series of carbosilane quaternary ammonium surfactants with different hydrophobic carbosilane structures (triethylsilyl, triisopropylsilyl, trihexylsilyl, triphenylsilyl) and tail groups (C 12 , C 16 , C 18 ) have been synthesized and the structures of the organosilicon carbosilane quaternary ammonium surfactants were determined by means of FTIR, NMR and elemental analysis. The properties of aqueous solutions were determined by electrical conductivity measurements and with the method of maximum bubble formation. Members of this series reduced the surface tension of water to approximately 30.5 mN/m at concentration levels of 0.14 mmol/L.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advances in Materials Science and Engineering
·
2021
·
IF 1.726
Wenli Peng,Li Gan,Weihan Li,Shixiong Deng
The development of probes for the testing of the carcinogenic pollutant 2,4,6-trinitrophenol (TNP) is of great importance for environmental protection and human health. In this paper, a new rapid and sensitive fluorescence detection method based on carbon dots (CDs) was designed for the detection of TNP. The CDs were synthesized by simple pyrolysis using citric acid as raw material and characterized by various advanced techniques. The addition of TNP caused a significant turn off in the fluorescence of the CDs. The fluorescence quench intensity and TNP concentration exhibited a good linear correlation in the range of 0–80 μM with a minimum detection limit of 0.48 μM and a related coefficient of 0.994. The analytical method was applied to the determination of trace TNP in river water and tap water with recoveries in the range of 98%–110% and relative standard deviations less than 5%. Importantly, carbon dots functionalized papers (CDFPs) were prepared using the synthesized CDs and successfully applied to the determination of TNP in aqueous solutions, demonstrating the promising application of the method.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Progress in Natural Science-Materials International
·
2023
·
IF 4.7
Siyi Wang,Yuxuan Bai,Zhixiong Zhang,Chengde Xie,Wenhui Song,Chen Wang,Zhuoyu Ji,Jianjun Wang
In this study, the one-dimensional nanomaterial α-MnO 2 @ZIF-8 was satisfactorily fabricated using a simple hydrothermal method by modifying ZIF-8 on α-MnO 2 nanowires for high-performance extraction of U(VI) out of water solution. The experimental data indicated that the adsorption of U(VI) on α-MnO 2 @ZIF-8 was intensely dependent on solution pH but not on ionic strength . The maximum adsorption of U(VI) on α-MnO 2 @ZIF-8 at pH = 5.0 and T = 298 K was 802.36 mg/g, substantially higher than the adsorption on α-MnO 2 (22.32 mg/g) or ZIF-8(551.31 mg/g) under the same conditions, indicating that the performance of the modified α-MnO 2 was greatly enhanced. Attaining adsorption equilibrium within 45 min, the analytical kinetic process of α-MnO 2 @ZIF-8 indicated that its adsorption on U(VI) was monolayer chemisorption . The adsorption experiments and XPS analyzed the possible adsorption mechanism of U(VI) in the reaction with α-MnO 2 @ZIF-8 during the adsorption process , namely intra-sphere surface complexation, chemisorption and electrostatic interaction . The simple preparation and high removal efficiency of α-MnO 2 @ZIF-8 indicated that this adsorbent had good prospects for application in wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Huanhuan Wang,Xuefeng Zhu,Hongbo Xu,Qunhui Yuan
Herein, an assembly of a new synthesized lariat ether ( Pc ) was demonstrated as a novel fluorescent indicator for the determination of silver ions in aqueous solution. The silver-specific receptor Pc was constructed by incorporating an azacrown[N,S,O] moiety into a picoline fluorophore. The UV–vis spectra revealed that the self-assembly of the stacked Pc molecules is initially in a form of J- aggreate ( Pc J-agg ), whereas it gradually converts to a form of H -aggregate ( Pc H-agg ), driven by the π-π stacking and hydrophobic effects. Under ultrasonic oscillation, the transformation of the aggregated forms from Pc J-agg to Pc H-agg would be disturbed while a formation of a new stable assembled form of Pc molecules denoted as Pc NS was initiated. The morphology and nanosheeted structure of the new Pc NS were revealed by atomic force microscopy and dynamic light-scattering measurement. As for the investigation of its emission property, the fluorescence spectroscopy was used and an evidently blue-shifted fluorescence was observed. When used as a stimuli-responsive fluorescent indicator, the Pc NS assembly was degraded upon the addition of silver ions, accompanying a 44 nm bathochromic shift in its fluorescence emission spectrum. Investigation of its selectivity for various cations confirmed that the Pc NS nanosheet assembly could be efficiently used for the detection of silver ions.
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Xiaofei Li,Xin Ding,Yuhang Du,Chao Xiao,Kang Zheng,Xianglan Liu,Xingyou Tian,Xian Zhang
Liquid metals (LMs) are playing an increasingly important role in the fields of flexible devices, electronics, and thermal management due to their low melting point and excellent thermal and electrical conductivity, and the transformation of LMs in deionized water has recently received much attention. In this paper, we investigate the transformation process of EGaIn microspheres in deionized water and propose a two-step process of microspherical transformation, whereby the microspheres are first deformed into a spindle shape and then into lamellar nanorods. It is also shown that the growth of GaOOH crystals drives the transformation. Based on this result, EGaIn microspheres with controllable transformation could be prepared, such as spindle or lamellar rod shapes, extending the application area of LMs.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
Russian Journal of Physical Chemistry A
·
2025
·Vol. 99
·期 7
·1487-1493
·
IF 0.8
Lv Hao,Wen-hao Mai,Ya-yuan Zheng,Huai-ming Du,Bo Xing
Ammonium dihydrogen phosphate (MAP) is a highly efficient compound fertilizer and industrial raw material, yet commercial industrial-grade MAP often contains a substantial amount of impurities and presents issues with particle size distribution and shape. These factors make it unsuitable for use as battery-grade MAP, necessitating the study of MAP’s crystallization in H 2 O–Ethylene Glycol (EG) binary systems to identify potential solutions. This paper explores the thermodynamic process of MAP crystallization in these systems. It reports the results of a comprehensive study on the effects of H 2 O–EG binary system proportions on MAP’s thermodynamics. This research employs a range of established models, including the Apelblat model, Van’t Hoff model, and Redlich–Kister model, to correlate the experimental data and determine the thermodynamic parameters associated with MAP’s crystallization process. Furthermore, the Mersmann equation and Barata equation are utilized to calculate the solid-liquid surface tension (γ) and the crystal surface entropy factor ( f ) of MAP in the systems. The thermodynamic experimental results of this paper provide a preliminary research foundation for the crystallization kinetics of MAP. The findings indicate that the dissolution of MAP is an endothermic and non-spontaneous process, primarily driven by enthalpy changes. The Apelblat model appears to offer a superior description of MAP’s solubility. The findings of this study are of significant importance to designers engaged in the industrial crystallization process of MAP. They provide valuable information for the optimization and improvement of the production process of MAP, thereby enhancing its quality and efficiency.
研究领域:
化学工程
·
材料科学
·
热力学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）