DYES AND PIGMENTS
·
2020
·
IF 4.613
Furan Zou,Huaxu Ling,Lei Zhou,FangFang Wang,Ying Li
Herein, we demonstrate a successful preparation method of ionic liquid functionalized POSS hybrids by quaternization of imidazole salt with Octa-(ɤ-chloropropyl) POSS. A novel photofunctional hybrid soft material POSS- min-[Eu(tta) 4 ] (tta:2-thenoyltrifluoroacetone) was reported via an ion-exchange reaction between imidazolium-based POSS(POSS-min-Cl) and lanthanide complex [Eu(tta) 4 ] - . The obtained hybrids were extensively characterized by FT-IR, 1 HNMR, 13 CNMR, UV–Vis, PL and TGA in detail. What's more, POSS-min-[Eu(tta) 4 ] displays higher fluorescence intensity , longer lifetime and higher thermostability than corresponding pure complex. More significantly, POSS-min-[Eu(tta) 4 ] exhibits the improvement of photo physical properties (ƞ = 53.73 %) and is selected as the representative sample to examine the potential fluorescence sensing of metal cations. The hybrid POSS-min-[Eu(tta) 4 ] has selective fluorescent quenching effect for different metal ions, especially for Cu 2+ . These results provide meaningful data for the multi-component assembly and responsive luminescent of photo functional hybrids based on modified ionic liquid and lanthanide, which can be expected to have potential application in organic light-emitting devices(OLED) or sensor.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Xuanxuan An,Qin Tan,Shuang Pan,Hui Liu,Xiaoli Hu
A “turn-on” fluorescent probe based on amino-functionalized metal-organic frameworks (MOF-5-NH 2 ) is developed for the detection of Cu 2+ , Pb 2+ and pyrophosphate (P 2 O 7 4− , PPi). The fluorescence emission of fluorescent materials obtained by one-step synthesis is attributed to organic ligands. Cu 2+ and Pb 2+ coordinate with the amino group on the surface of the MOF-5-NH 2 , which is ascribed to the host-guest electron transfer between analyte and probe, giving rise to the fluorescence quenching . After adding PPi, the intense affinity between Cu 2+ and PPi remove Cu 2+ from the MOF-5-NH 2 , blocking of the electron transfer process, and the fluorescence can be recovered. The limit of detection is 0.057, 0.25 and 0.32 μmol L −1 for the detection of Cu 2+ , Pb 2+ and PPi, respectively. This turn-on mode based fluorescent probe shows preferable sensitivity and specificity to detect Cu 2+ , Pb 2+ and PPi. These results demonstrate that the fluorescent MOF-5-NH 2 as a sensing platform displays remarkably performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 7
·903-909
·
IF 2.896
Yiming Liu,Yanan Sun,Minli Yang
A new kind of convenient, low-cost double-potential ratiometric ECL sensing platform for the quantification of Cu2+ was developed with carbon nitride nanosheets (g-C3N4 NSs) and graphene quantum dots (GQDs) as ECL luminophores. g-C3N4 NSs mixed with multi-walled carbon nanotubes (MWCNTs) was immobilized on a glass carbon electrode (GCE) and produced strong cathodic ECL at a potential of −1.2 V (vs. Ag/AgCl), while GQDs in the solution gave anodic ECL at +2.5 V. MWCNTs were used here to amplify the ECL signal of g-C3N4 NSs. The addition of Cu2+ causes the cathodic ECL signal from g-C3N4 to decline, while the anodic ECL signal from GQDs remains unchanged. With the anodic ECL signal as an internal reference, a double-potential ratiometric ECL sensing platform for Cu2+ was established. The ratio of the cathodic signal intensity to anodic signal intensity showed a linear response to the Cu2+ concentration over a range from 5.0 × 10−10 to 1.0 × 10−6 mol L−1 and the detection limit was 0.37 nmol L−1 (3σ/S). Such a construction strategy alleviates the interference from the environment and therefore improves the detection accuracy of Cu2+. Compared with other methods for Cu2+ detection, this method is simpler and more sensitive.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 24
·8171-8182
·
IF 7.059
Jing Wang,Jin Liu,Jing Wang,Yao Wang,Jie Cao,Lin Hou,Ruifen Ge,Jinnan Chi,Linjun Huang,Junlan Guo,Abdur Raheem Aleem,Zhengxing Song,Shree Krishna Tamang,Jixian Liu,Guanghui Wang,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
The in vivo trace content of some transition-metal ions is important for biological systems and an inappropriate content may cause diseases. With the purpose of developing an efficient sensing system for Cu2+, this work demonstrates the excellent sensing property of Tb3+/Eu3+-induced polysaccharide aggregates. Photophysical measurements indicate that at a Cu2+ concentration of 20 μM, the fluorescence of Tb3+-induced polysaccharide aggregates (TIPAs) or Eu3+-induced polysaccharide aggregates (EIPAs) can be quenched rapidly and sensitively. Addition of EDTA to chelate Cu2+ restores the fluorescence, indicating that the fluorescence quenching in the presence of Cu2+ is reversible. Initial cytotoxicity experiments with mammalian cells show that the luminescent lanthanide complexes are cytotoxic, but complexing the lanthanides to polysaccharides renders them cytocompatible. These new complexes integrate the advantages of superior lanthanide fluorescence, compatibility with aqueous systems, and cytocompatibility. The microparticle formulation EIPA can be used for applications that require the complexes to be removed from the sample (e.g. by centrifugation), whereas the nanoparticle formulation TIPA is suitable for cell labeling applications with excellent water-solubility, biocompatibility, non-cell toxicity, and cell imaging.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2020
·Vol. 12
·期 7
·943-950
·
IF 2.596
Dandan Li,Lihua Gong,Zhenyang Qiao,Congcong Zhu,Qiaojuan Jia,Huajie Kong,Shuyan Jiao
A novel highly selective colorimetric fluorescence probe, POPH, has been successfully synthesized and it shows remarkable selective and sensitive response to Cu2+ in aqueous media (HEPES buffer, pH = 7.4). The fluorescence of probe POPH immediately decreased when 1.1 equiv. of Cu2+ was added to a solution of probe POPH, accompanied by color change from wathet blue to colorless under 365 nm UV lamp illumination. The possible bonding model of probe POPH with Cu2+ was examined through HRMS, FESEM, TEM, FTIR spectroscopy and DFT calculations. Moreover, the probe POPH could be used for monitoring Cu2+ in living cells using laser scanning confocal microscopy.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Abdelazeem S. Eltaweil,Injy M. Mamdouh,Eman M. Abd El-Monaem,Gehan M. El-Subruiti
Herein, we report a new metal–organic framework (MOF)-based composite beads adsorbent made via incorporating UiO-66 MOF, carboxylated graphene oxide (GOCOOH) into sodium alginate for efficient removal of methylene blue dye, and Cu2+ ions. The successful fabrication of the synthesized UiO-66/GOCOOH@SA composite beads was confirmed by means of X-ray diffraction, Fourier transform infrared, scanning electron microscopy, zeta potential, X-ray photoelectron spectroscopy analysis, and thermogravimetric analysis and BET measurement. The incorporation of both UiO-66 and GOCOOH into SA beads greatly increased their adsorption efficiency for the removal of both MB and Cu2+ with maximum adsorption capacities of 490.72 and 343.49 mg/g, respectively. The removal process of both MB and Cu2+ follows the pseudo-second-order model and Freundlich isotherm model. A plausible adsorption mechanism was discussed in detail. Regeneration tests clarified that the removal efficiencies toward both MB and Cu2+ remained higher than 87% after five cycles. These results reveal the potentiality of UiO-66/GOCOOH@SA beads as an excellent adsorbent.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jianhua Sha,Lulu Li,Zexiu An,Maoxia He,Haiyan Yu,Yao Wang,Baoyu Gao,Shiping Xu
Coexistence of heavy metals usually shows great impact on antibiotics removal. In this study, we firstly reported that Cu 2+ shows diametrically opposite effect on adsorption-photodegradation of sulfamerazine (SMZ) and ciprofloxacin (CIP) in g-C 3 N 4 /visible light system. Cu 2+ can greatly promote CIP adsorption, but showed negligible impact on its degradation, whereas, no obvious influence on SMZ adsorption was recorded, but strong inhibition to its photodegradation was observed. With help of several spectroscopy approaches and DFT calculation, functional mechanism of Cu 2+ on the adsorption-photodegradation of SMZ and CIP was proposed. The main reasons for their different behaviors were found to be their distinct surface charge, spatial structure, electron distribution and complexation with Cu 2+ . Among them, effect of complexation played the most important role in depressing the reactivity of antibiotics during photodegradation . Aiming at retarding this inhibition, an effective approach with idea of complexation replacement was proposed. This study indicated that interactions between antibiotics and heavy metals are very specific, and an appropriate treatment scheme should be given based on systematic study targeting at the specific pollution system.
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Hongwei Ren,Xue Wang,Ruiquan Gong,Meiyu Li,Hongyu Zhu,Jinfeng Zhang,Erhong Duan
Heavy metal ions in wastewater have brought serious environmental pollution. To improve the detection efficiency, it is important to find useful fluorescent probes . The emerging green natural deep eutectic solvents (NADESs) offer attractive option for “green” detection for its good biocompatibility, easy preparation, and high sensitivity. In this study, a multi-functionalized fluorescent probe with atomically dispersed EuCl 3 ·6H 2 O in amino acid-based NADESs ( l -Glutamic acid/Glycerol, l -Glu/Gly) was synthesized by metal-ligand coordination interactions with a mass ratio of 15:1. Combined with the NADESs and rare earth metal , the l -Glu/Gly/EuCl 3 ·6H 2 O could form the amino site and Eu 2+ site fluorescent centers. Under the excitation wavelength of 370 nm, it had dual emission peaks at 425 nm and 470 nm with efficient resonance energy transfer . The stable optoelectronic properties of l -Glu/Gly/EuCl 3 ·6H 2 O under external factors, such as mass ratio (13,1 to 18:1), temperature (30–50 °C), pH (1 to 14) and storage time ( >42 days), approved l -Glu/Gly/EuCl 3 ·6H 2 O an excellent fluorescence probe. In the application of water-quality monitoring, Fe 3+ and Cu 2+ could react with l -Glu/Gly/EuCl 3 ·6H 2 O in different reactive patterns. The blue fluorescence was quenched by Fe 3+ and enhanced by Cu 2+ , thus metal ions could be distinguished with high sensitivity. The detective process was determined and the fluorescent mechanism was also proposed. l -Glu/Gly/EuCl 3 ·6H 2 O fluorescent probe was demonstrated to be an efficient fluorescent probe for metal detection avoiding the hydrothermal process, and the cumbersome of ilter, dialysis, freeze drying.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 28
·3570-3577
·
IF 2.378
Baoya Zhu,Mingyu Tang,Liying Yu,Yaoyao Qu,Fang Chai,Lihua Chen,Hongbo Wu
In this paper, silicon nanoparticles (Si NPs) were synthesized by a simple one-step procedure by applying uric acid as reducing agent. The as-prepared Si NPs exhibited emission at 425 nm under excitation at 345 nm, allowing them to be developed as a fluorescent and colorimetric probe for detection of Cu2+ and Mn2+. As a probe, the fluorescence and color change of the Si NPs induced by Cu2+ and Mn2+ exhibited contrast. As a fluorescence probe, the Si NPs exhibited intense enhancement caused by Cu2+ and Mn2+ with detection limits of 0.562 μM (Cu2+) and 1.02 μM (Mn2+). More significantly, the Si NPs could be applied to effectively detect Cu2+ and Mn2+ in real samples. Interestingly, a Si NPs-based gel membrane was fabricated and established to be selective for visual recognition of Cu2+ and Mn2+. A cell imaging experiment revealed that the Si NPs possessed excellent biocompatibility and low cytotoxicity in living cells. Additionally, the powder form of the Si NPs can be easily prepared and used to visualize latent fingerprints (LFPs) with good performance.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2018
·
IF 2.746
Lin Wang,Xue Gong,Qijing Bing,Guang Wang
An asymmetrical oxadiazole derivative (Sensor 1 ) containing one pyridine and one formyl connecting to two benzene rings on both sides of oxadiazole unit was designed and synthesized. Sensor 1 displayed selective colorimetric sensing for Co 2+ and Cu 2+ ions via color changes to blue and yellow from colorless in CH 3 CN solutions, respectively. Sensor 1 not only exhibited an instantaneous naked-eye color change and but also could be used as a convenient test kit for recognition and detection of Co 2+ ions. Sensor 1 presented high colorimetric sensitivity for Co 2+ with low detection limit (3.92 × 10 −6 mol/L). Sensor 1 also displayed “On-Off” fluorescent sensing for Cu 2+ over a wide range of competitive metal ions and could accurately detect the existence of Cu 2+ in water samples via the fluorescent quenching and color change. The fluorescence intensity of sensor 1 in CH 3 CN solution showed a linear response to Cu 2+ in the wide concentration range of 0–40 μM which is beneficial for quantitative analysis. The studies on absorbance and fluorescence titration, 1 H NMR spectrum and ESI-MS spectra confirmed that colorimetric sensing for Co 2+ and fluorescent sensing for Cu 2+ are ascribed to the complex formation with the stoichiometry of 1:1 for Co 2+ and 1:2 for Cu 2+ .
✓ 已验证
产品关联
DOI
高影响因子
Environmental Chemistry
·
2018
·Vol. 15
·期 5
·306-316
·
IF 2.923
Weifeng Liu,Lei Qin,Zhuolin An,Lin Chen,Xuguang Liu,Yongzhen Yang,Bingshe Xu
Environmental context Because of the multiple industrial applications of metals, contamination by metal ions is widespread and can at times endanger the environment and the health of human beings. We prepared ion-imprinted adsorbents to achieve selective recognition and smart separation of low-concentrations of copper ions from water. These smart imprinted materials have high potential for selective adsorption and removal of contaminant copper ions, particularly at very low concentrations. A temperature-responsive magnetic adsorbent (poly(N-propyl acrylamide) grafted magnetic carbon microspheres, Cu2+-IIP) was synthesised by ion imprinting technology for low concentration Cu2+ removal. Cu2+-IIP was prepared by using N-propyl acrylamide as a thermo-sensitive functional monomer, N,N-methylene-bis-acrylamide as a cross-linker and ammonium persulfate as an initiator. The morphologies and microstructures of samples were characterised by transmission electron microscopy, Fourier transform infrared spectrometry, thermogravimetry and vibrating sample magnetometry. Adsorption experiments were conducted in terms of kinetics, isotherms and selective recognition adsorption at low feed concentrations. Results indicate that Cu2+-IIP possesses good recognition selectivity and affinity for Cu2+, and can be separated from the treated solution quickly by applying an external magnetic field. The adsorption capacity towards Cu2+ depends on temperature and reaches a maximum value of 45.46 mg g−1 at 35 °C, higher than that of the non-imprinted polymer. The adsorption behaviour of Cu2+ on Cu2+-IIP can be well defined with both the pseudo-second-order kinetic model and Langmuir isotherm model. Cu2+-IIP performs good adsorption selectivity towards Cu2+ because the relative selectivity factors of Cu2+ with respect to Ni2+, Zn2+ and Cd2+ are 7.14, 7.60 and 6.77, respectively. The adsorption capacity of Cu2+-IIP remained 88.41 % after five cycles.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yi Lin,Palanisamy Kannan,Yanbo Zeng,Bin Qiu,Longhua Guo,Zhenyu Lin
In this work, we have synthesized Cu 2+ -modified carbon nitride nanosheets (Cu 2+ -C 3 N 4 ) as peroxidase mimic catalytic substance, which is more active than the horseradish peroxidase enzyme in extreme environments. Gold nanobipyramid (Au NBP) is a good chromogenic substrate for multicolor display because the longitudinal plasmon bands of AuNRs can be easily tuned by adjusting their aspect ratios and used as an excellent indicator for colorimetric detection of immunoassays . The generation of TMB 2+ from sandwich complex (peroxidase-like catalysis) efficiently etches Au NPBs to produce multicolor variations from brown to olive, green, blue, purple, purple, red, pink, and colorless in presence of varied concentrations of neuron specific enolase (NSE). The experimental results show that the colorimetric detection ranging from 312.5 to 20,000 pM with a detection limit of 92.8 pM, which is higher than other multicolor based sensors. The Cu 2+ -C 3 N 4 nanosheets and Au NBPs based colorimetric visual (naked eye) semi-quantitative method as a potential platform towards the detection of important biomolecules in clinical and therapeutic applications. The proposed method is simple, low-cost and enzyme-free to detect NSE for the first time.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）