JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2020
·
IF 3.306
Shengling Li,Duanlin Cao,Xianjiao Meng,Zhiyong Hu,Zhichun Li,Changchun Yuan,Tao Zhou,Xinghua Han,Wenbing Ma
In this study, a novel schiff base fluorescent probe (E)- N' -(3-(benzo[d]thiazol-2-yl)-2-hydroxy-5-methylbenzylidene)-7-(diethylamino)-2-oxo-2 H -chromene-3-carbohydrazide ( CHS ) was synthesized for sequential detection of Al 3+ and pyrophosphate ions (PPi) in a DMSO/HEPES (4:1 v/v, pH = 7.4) buffer system and characterized by 1 H NMR, 13 C NMR, ESI-HR-MS and DFT calculation. Its detection limit was determined to be 0.16 μM for Al 3+ and 0.18 μM for PPi in a pH range of 4∼8, respectively. The Job’ s plot showed that the stoichiometric ratio to Al 3+ was 1:1, and CHS -Al 3+ showed highly selective recognition of PPi. The sensor CHS could also recognize Al 3+ and PPi and exhibited fluorescence enhancement and quenching properties in HeLa cells.
研究领域:
分析化学
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生物分析
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分子探针
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细胞成像
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金属离子检测
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DYES AND PIGMENTS
·
2023
·
IF 4.5
Qiushuang Li,Bing Zhao,Xiangdong Kong,Liyan Wang,Wei Kan,Bo Song,Rui Yu,Pengfei Zhang
Designation and application of the luminescent COFs remains a tough challenge and imperative task because of their limited building block structure, the unavailable raw material, the tedious modification process, or the onefold sensing function. Herein, a fluorinated fluorescent covalent organic framework containing a phenanthro[9,10- d ]imidazole moiety [TFPB-PI(F)–COF] had been successfully designed for Cu 2+ and Al 3+ detection relayed by PO 4 3− . TFPB-PI(F)–COF serves as a highly sensing platform with the superior selectivity toward Cu 2+ and Al 3+ based on the coordination interaction and the chelation enhancement quenching (CHEQ) effect, and the detection limits are 2.3 and 4.2 n mol L −1 , respectively. Subsequently, accompanied with the gradual introduction of PO 4 3− , TFPB-PI(F)–COF@M (Cu 2+ and Al 3+ ) complex is wrecked due to electrostatic attraction with the detection limit of 10 n mol L −1 , led to the fluorescent recovery of TFPB-PI(F)–COF. Furthermore, the reversible fluorescent performance by the mode of “on–off–on” is perfect. Besides, the established relayed method can be successfully employed for the analysis of Cu 2+ and Al 3+ in environmental water samples with recoveries of 96.00–104.63 % and RSD <4.62 %. Moreover, the fluorescent images for the visual detection of Cu 2+ is also fabricated in living HeLa cells, which provides a modest contribution and an effective platform to the biological analysis.
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Analytical Methods
·
2014
·Vol. 6
·期 16
·6445-6451
·
IF 1.938
Xiaoyu Mu,Li Qi,Juan Qiao,Huimin Ma
The simplicity of the one-pot green synthesis routine and the capability of surface modification of various bioactive molecules make gold nanoclusters (Au NCs) highly suitable as scaffolds for the construction of novel chemical and biological sensors. In this work, we report a novel strategy to prepare amino acid stabilized fluorescent Au NCs via a green one-pot process. The obtained Au NCs possessed light green fluorescence with maximum emission at 498 nm and their quantum yield (QY) was evaluated to be 1.68%. Subsequently, the developed fluorescent Au NC biosensor allowed sensitive and selective detection of Fe3+ ions based on fluorescence quenching with a detection limit of 0.2 μM and Al3+ ions based on enhanced fluorescence with a detection limit of 0.3 μM, respectively. Furthermore, we testified the feasibility of applying this fluorescent probe for real sample analysis through the detection of Al3+ ions and Fe3+ ions in lake water, pond water and tap water. These results indicated that the as-prepared Au NCs had great potential to be developed as the favorable sensor for detection of metal ions in real samples.
研究领域:
分析化学
·
纳米生物学
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
·
IF 3.261
Pengcheng Yin,Qingfen Niu,Tao Wei,Tianduo Li,Yang Li,Qingxin Yang
A new thiophene-based colorimtric and fluorimetric dual functional sensor TSA was synthesized, which can highly sense Al 3+ and Cu 2+ ions in aqueous solution through two approaches: a significant fluorescence enhancement caused by Al 3+ and a visible color change from colorless to yellow induced by Cu 2+ . The sensor TSA showed a highly binding affinity only toward Al 3+ and Cu 2+ even in the presence of other competitive metal ions with low detection limits of 49 nM and 0.217 μM, respectively. The mechanisms of TSA for sensing Al 3+ and Cu 2+ were based on the metal ions coordination of TSA , which have been demonstrated by HR ESI-MS and 1 H NMR titration. In addition, sensor TSA was successfully applied to quantify Al 3+ and Cu 2+ in environmental water and food samples with good precision and accuracy. Moreover, the TSA -based test stips/silica can conveniently and practically detect and discriminate Al 3+ and Cu 2+ in water. Furthermore, sensor TSA has also been applied to detect Al 3+ in live HeLa cells. This work provides a new approach with easily synthetic route and economically cheap for ultrasensitive, selective, quantitative and differentiable detection of Al 3+ and Cu 2+ in environmental, food and biological systems.
研究领域:
分析化学
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生物医学
·
环境科学
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高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 15
·5035-5047
·
IF 4.052
Ling Zhu,Yue-Ling Bai,Yongmei Zhao,Feifei Xing,Ming-Xing Li,Shourong Zhu
A complexone analog chemosensor, H2L, bearing chelating bis(2-pyridylmethyl) amine and alizarin groups was synthesized via the Mannich reaction. H2L chromically responds to OH−, F−, CH3COO−, and H2PO4− in DMF, CH3CN, and acetone, but not in CH3OH or H2O. The addition of F− ions to H2L selectively induces a significant and visible color change in acetonitrile and shifts both methylene proton signals upfield. H2L also exhibits visible responses to Mg2+, Sr2+, Ba2+, Tb3+, Cu2+, Co2+, Ni2+, Zn2+, Mn2+, Cd2+, and Fe3+ in solution. AlCl3 can form an Al : L = 2 : 3 complex that not only changes the color of the DMF solution, but also significantly increases its fluorescence intensity. The limit of fluorescence turn-on detection for AlCl3 in DMF is 2.7 × 10−8 M, which is an order higher than those of other anthraquinone sensors reported in the literature. NMR spectroscopy shows that hydroxyl is not deprotonated upon interacting with Al3+, but will be partially deprotonated in the presence of Zn2+. Contrary to the complexone, the H2L–Ce(III) complex does not react chromically to F−. However, the H2L–NiCl2 complex responds chromically to F−, with higher sensitivity (LOD = 1.3 × 10−6 M F− in acetonitrile) than free H2L. The spectral changes in the presence of F− are similar to that of OH−; however, the spectrum shifts slightly to a longer wavelength and is more sensitive to both H2L and the H2L–NiCl2 complex. Moreover, 4% or less H2O in the solvent essentially has no influence on the F− sensitivity; however, high water content significantly decreases the F− sensitivity. The spectral changes of the Zn2+, Cu2+, Fe3+, Ce3+, and Ni2+ complexes in the presence of different NaOH concentrations were also investigated.
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CARBON
·
2018
·
IF 7.082
Huiyu Li,Yuan Xu,Li Zhao,Jie Ding,Mengyang Chen,Guangrui Chen,Yi Li,Lan Ding
The solid-phase pyrolysis method is widely used in the synthesis of fluorescent carbon dots (CDs) because of its large scale and solvent-saving advantages. However, CDs are inclined to agglomerate during the synthesis process, resulting in low quantum yield (QY) and inhomogeneous distribution of particle sizes. Here, a simple and effective solid dispersion surface pyrolysis method was used for the synthesis of tiny-carbon dots (T-CDs) with a high QY. Multi-walled carbon nanotubes (MWCNTs) were used as a support and 2-( N -morpholino)ethanesulfonic acid (MES) as a precursor. MES was uniformly dispersed on the surface of MWCNTs by hydrogen bonding and π-π interactions. Due to the excellent thermal conductivity and rigidity of MWCNTs, the precursor is carbonized without agglomeration. Compared with the CDs obtained by the direct pyrolysis method without the use of a solid support, the particle size of the T-CDs is small (0.69 ± 0.14 nm) and the QY increased from 17.8 to 42.8%. It is anticipated that this method will lead to the improvement of the QY of CDs. Applications of the T-CDs included fluorescence detection of rutin in pharmaceuticals, human urine, and human serum samples, and determination of Al 3+ in tap water samples.
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Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 24
·7274-7284
·
IF 7
Yulin Kong,Yawei Xiao,Shutao Zhang,Liang Chen,Zhaoping Liu,Yude Wang
Aqueous zinc-ion batteries (AZIBs) are considered promising energy storage devices for future large-scale energy storage systems due to their high safety, low production cost, and non-combustibility. However, low operating voltage and energy output are still drawbacks in their practical applications. Herein, we develop a cubic aluminum hexacyanoferrate/graphene high-voltage cathode material for rechargeable AZIBs, and it exhibits an activation process and can deliver a high output voltage of 1.8 V (vs. Zn/Zn2+) with a specific energy density of 125.56 W h kg−1. The voltage is increased by stretching the Fe–C bonds in the Fe–CN–Al covalent structure. The reversible phase transformation between cubic AlFe(CN)6 and cubic–orthorhombic–monoclinic Zn0.5AlFe(CN)6 occurs with the intercalation/extraction of zinc ions, and the coordination environment of Al plays a decisive role in this key process. This work will provide a feasible reference for the structural design of high-voltage Prussian blue analog cathode materials.
研究领域:
材料科学
·
电化学
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Yumin Hao,Wenjuan Dong,Yang Liu,Xiaole Wen,Shaomin Shuang,Qin Hu,Chuan Dong,Xiaojuan Gong
Ratiometric fluorescence sensor has high selectivity and good sensitivity; however, its development is limited by intricate design, tedious synthesis, etc. Herein, a facile and effective ratiometric fluorescence sensing platform for fluoride ion (F - ) detection was developed by simply combining nitrogen-doped carbon dots (N-CDs) and morin-Al 3+ based on inner filter effect (IFE). The competitive binding of F - to Al 3+ obviously decreased morin-Al 3+ fluorescence and increased N-CDs fluorescence, attributing to the inhibition of IFE between N-CDs and morin-Al 3+ . The as-constructed ratiometric fluorescence sensing platform can be used for F - detection with a wide linear range (0.5–150 μM) and a low detection limit (55.8 nM). Interestingly, with the introduction of F - into the N-CDs/morin-Al 3+ sensing platform, a distinguishable change in fluorescence color from green to blue enabled the N-CDs/morin-Al 3+ system to be used as a smartphone-assisted visual sensing platform for F - detection with a detection limit of 2.09 μM. This platform was successfully applied for the onsite monitoring of F - in various water samples with satisfying results. These findings provide a novel guidance for the facile construction of a ratiometric optical dual-mode and smartphone-assisted sensing platform based on CDs, revealing the broad application prospect of CDs in environmental monitoring field.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Yong Liu,Yong Chen,Yufeng Da,Fei Xie,Jianlong Wang
Herein, we report an integrated coagulation/ photo-Fenton (CPF) process for advanced treatment of mature landfill leachate using nascent aluminum ions as coagulant and hydrogen peroxide (H 2 O 2 ) as oxidant for Fenton reaction , which were in-situ produced by a novel chlorine and nitrogen co-doped aluminum-graphite (Cl, N-Al-Gr) composite. The coagulation of the MBR-treated landfill leachate was performed by nascent aluminum ions generated in Cl, N-Al-Gr/O 2 system; and the resulting coagulation effluent was treated by photo-Fenton oxidation in the presence of ultraviolet (UVA). The Cl, N-Al-Gr composite exhibited excellent performance for in-situ H 2 O 2 production (813.9 mg/L). The humic substances in landfill leachate could promote the cycle of Fe 3+ /Fe 2+ , and the removal efficiency of total organic carbon (TOC) and color was 88.1% and 97.6%, respectively under the optimized condition. The current study suggested that “coagulation + Fenton” process using nascent Al 3+ as coagulant and in-situ generated H 2 O 2 for Fenton oxidation could be a new way for wastewater treatment .
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Kunyi He,Tong Bu,Xiaohan Zheng,Junfang Xia,Feier Bai,Shuang Zhao,Xin yu Sun,Mengna Dong,Li Wang
The sensitive detection of foodborne pathogens is of great significance for ensuring food safety and quality. Herein, on the basis of methylene blue-embedded zirconium based organic framework ( [email protected] ) as the remarkable capture carrier and signal indicator, with the Al 3+ -assisted the fluorescent signal response, we developed a label-free and dual-signal lateral flow immunochromatographic assay (LDLFIA) for sensitive detection of Escherichia coli ( E. coli ) O157:H7. The [email protected] sensing carrier without monoclonal antibodies (mAbs) was manufactured, which adhered to bacteria to form the [email protected] E. coli O157:H7 conjugate, resulting in visible blue band. Then the fluorescent response of the OH-rich [email protected] was excited by introducing Al 3+ , arising from capturing of Al 3+ by -OH through coordination and electrostatic affinity, thus generating a green fluorescent band. Impressively, a smartphone-based portable reading system was developed that can reflect the test results of [email protected] immediately. Under optimum conditions, [email protected] can complete colorimetric and fluorescent mode detection within 90 min, with a detection sensitivity of 10 3 CFU/mL, which were 100 times lower than traditional gold nanoparticles-based LFIA and polymerase chain reaction (PCR). Moreover, the feasibility of the method was further evaluated by the determination of E. coli O157: H7 in drinking water and cabbage with average recoveries of 85.1-123.0%.
研究领域:
食品科学
·
分析化学
·
生物技术
·
微生物学
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高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Yang Li,Qingfen Niu,Tao Wei,Tianduo Li
A novel bifunctional thiophene-based Schiff base TS as a colorimetric and fluorescent turn-on sensor for rapid and simultaneous detection of Al 3+ and Zn 2+ ions with high selectivity and sensitivity has been developed. The sensor shows remarkable fluorescence enhancement response for Al 3+ and Zn 2+ over a broad pH range with good anti-interference capability, which accompanied with an obvious color change easily detected by naked eyes. Sensor TS can detect as low as 3.7 × 10 −9 M for Al 3+ and 3.0 × 10 −8 M for Zn 2+ , whereas respective association constants are 1.16 × 10 4 M −1 and 2.08 × 10 4 M −1 . With the help of fluorescence titration and Job's plot, the stoichiometric ratio of TS with Al 3+ /Zn 2+ was determined to be 1:1. The sensing mechanism of sensor TS with Al 3+ /Zn 2+ based on the chelation-enhanced fluorescence (CHEF) was analyzed in detail through 1 H NMR titration, FTIR, HRMS and DFT studies . Moreover, sensor TS has been applied to the detection of Al 3+ and Zn 2+ in real environmental water and food samples as well as the filter paper-based test strips. Furthermore, sensor TS has good cell-permeability and can be used to selectively sense intracellular Al 3+ and Zn 2+ by bioimaging.
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Materials Today Chemistry
·
2026
·
IF 6.7
Wanqing Qian,Yan Shu,Cai Pan,Xueqing Yu,Weitao Su,Mikhail P. Kuz'min,Kaixin Song
Near-infrared phosphor conversion light emitting diode (NIR pc-LED) has important application value in plant growth, night vision imaging and biological detection. Its performance depends on the optimized design of fluorescent materials. Based on gadolinium gallium garnet (Gd 3 Ga 5 O 12 ), the near-infrared phosphors of Gd 2.5 (CaSn) 0.5 (InAl) 0.5 Ga 3.5-x O 12 : xCr 3+ (x = 0.01–0.09) were prepared by Ca 2+ -Sn 4+ /In 3+ -Al 3+ double ion pair synergistic substitution strategy. Under excitation of 450 nm blue light, the material exhibits broadband near-infrared emission covering the range of 650–1150 nm, with a quantum yield of 96.29 %. The material exhibits excellent thermal stability of luminescence and can maintain 82.4 % of the initial emission intensity at room temperature at 423K. The NIR pc-LED device based on this phosphor package achieved 67.37 mW output power and 16.68 % photoelectric conversion efficiency at 100 mA driving current. Application verification shows that the NIR pc-LED light source shows excellent performance in plant supplementary light, night vision security, information encryption and nondestructive testing applications. It fully proves that the broadband near-infrared emission of this series of phosphors can take into account multi-functional application scenarios and has broad development prospects.
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