CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiangqian Li,Jiapei Gu,Zhan Zhou,Lufang Ma,Yiping Tang,Jinwei Gao,Qianming Wang
The generation of novel optical sensing structures through the lanthanide coordination has been a key scientific endeavor. The design of molecular indicator for chemical response is derived from the assembly of a polymeric-based ternary europium (III) complex system (Eu(NTA) 3 L/PVA (NTA = 4,4,4-trifluoro-1-(naphthalen-2-yl)butane-1,3-dione, L = 2-(4-(4-(allyloxy)phenyl)-6-(pyridin-2-yl)pyridin-2-yl)pyridine, PVA = poly(vinyl acetate)). The electrospinning technique has been employed to create a nanometer scale membrane and this functional film with ultrafine fibers (diameter of about 110 nm) exhibits intense red light at 618 nm under ultra-violet excitation of 340 nm. The luminescent signal transduction involves the interaction of hydrogen chloride (HCl) with the organic ligand. The strong acidity of the analyte induces dissociation of complex network and the evolution of emission from red to blue has been observed. The fabricated nanosensor demonstrates rapid response time (<2 s) and the detection limit has been calculated to be 3.0 ppm. This effective strategy for achieving lanthanide complex-encapsulated polymer fibers will contribute to the development of new intelligent photonic devices.
研究领域:
材料化学
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分析化学
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纳米科技
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光子学
·
功能材料
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Xu Chu,Tao Chen,Yan Cao
This paper reports a simple, rapid and sensitive fluorescence sensor for the parallel determination of iron (III) (Fe 3+ ), terbium (III) (Tb 3+ ) and europium (III) (Eu 3+ ) ions using Carbon Dot (CD) serving as a fluorescence probe. The Carbon Dot (CD), which was synthesized via an acid-cutting method using anthracite coal as the carbon source, was found to have rich carboxyl and hydroxyl groups on its surface. The fluorescence of the as-prepared CD can be selectively quenched by the Fe 3+ ion via non-radiative electron-transfer, and furthermore, the as-prepared CD can also sensitize the luminescence of both Tb 3+ and Eu 3+ ions through the antenna effect and enhance the fluorescence of Tb 3+ and Eu 3+ by more than several orders of magnitude. Therefore, the as-prepared CD was applied as a fluorescence probe towards the parallel determination of Fe 3+ , Tb 3+ and Eu 3+ and exhibited detection limits in 0.019, 0.10 and 0.79 μM, respectively. The fluorescence quenching mechanism and energy transfer mechanism were also studied in details.
研究领域:
分析化学
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环境监测
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纳米材料
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荧光探针
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生物传感
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Xue-Dong Xiao,Lin Shi,Li-Hui Guo,Jun-Wen Wang,Xiang Zhang
The supramolecular interaction between the water-soluble pillar[5]arene (WP[5]) as host and dopamine hydrochloride (DH) as guest was studied by spectrofluorometry . The fluorescence intensity of DH gradually decreased with increasing WP[5] concentration, and the possible interaction mechanism between WP[5] and DH was confirmed by 1 H NMR, 2D NOESY , and molecular modelling. Based on significant DH fluorescence, a highly sensitive and selective method for DH determination was developed for the first time. The fluorescence intensity was measured at 312 nm, with excitation at 285 nm. The effects of pH, temperature, and reaction time on the fluorescence spectra of the WP[5]-DH complex were investigated. A linear relationship between fluorescence intensity and DH concentration in the range of 0.07–6.2 μg mL − 1 was obtained. The corresponding linear regression equation is Δ F = 25.76 C + 13.56 (where C denotes the concentration in μg mL − 1 ), with the limit of detection equal to 0.03 μg mL − 1 and the correlation coefficient equal to 0.9996. This method can be used for the determination of dopamine in injection and urine samples. In addition, the WP[5]-DH complex has potential applications in fluorescent sensing and pharmacokinetics studies of DH.
研究领域:
分析化学
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超分子化学
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药物代谢
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生物分析
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药代动力学
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DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2016
·Vol. 90
·期 2
·399-405
·
IF 0.597
Wang Aiqing,Cui Yuezhi,Tao Furong,Gu Caihong,Wang Shijie,Li Tianduo
A functionalized glass sensor ( G-P ) was prepared for detecting nitroaromatic compounds (NACs) by chemically immobilizing a conjugated polymer P on the surface of a glass slide. The monolayer film sensor had several advantages: the signal amplification effect of conjugated polymers, no leakage of sensing materials in solution, and good permeability for the analytes. Fluorescence quenching studies demonstrated that the sensor was highly sensitive to NACs. When the DNT concentration was 1.03 × 10 –7 mol/L, the quenching efficiency (1– I / I
0 ) of G-P reached 52.8%. Moreover, the excellent properties of reversibility, selectivity and sensitivity indicated the glass G-P might be a promising sensor in the field of explosives detection.
研究领域:
分析化学
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材料科学
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传感器技术
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环境监测
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安全检测
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高分子化学
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光学传感
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Xiang Shen,Bing Yan
A series of luminescent Ln 3+ @bio-MOF-1 (Ln = Eu, Tb, bio-MOF-1 = Zn 8 (ad) 4 (BPDC) 6 O⋅2Me 2 NH 2 (ad = adeninate, BPDC = biphenyldicarboxylate)) are synthesized via postsynthetic cation exchange by encapsulating lanthanide ions into an anionic metal–organic framework (MOF), and their photophysical properties are studied. After loading 2-thenoyltrifluroacetone (TTA) as sensitized ligand by a gas diffusion (“ship-in-bottle”) method, it is found that the luminescent intensity of Eu 3+ is enhanced. Especially, when loading two different lanthanide cations into bio-MOF-1, the luminescent color can be tuned to close white (light pink) light output. Additionally, bio-MOF-1 and Eu 3+ @bio-MOF-1 are selected as representative samples for sensing metal ions . When bio-MOF-1 is immersed in the aqueous solutions of different metal ions , it shows highly sensitive sensing for Fe 3+ as well as Eu 3+ @bio-MOF-1 immersed in the DMF solutions of different metal ion. The results are benefit for the further application of functionalized bio-MOFs in practical fields.
研究领域:
无机化学
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材料科学
·
分析化学
·
纳米生物技术
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光物理学
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配位化学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Min Yang,Yujia Yan,Enzhou Liu,Qian Sun,Jun Fan
In recent years, all-inorganic perovskite has been extensively studied due to its excellent photoelectric properties, but the application of Cs n PbBr 2+ n perovskite with excellent stability in the field of chemical sensing has yet to be developed. Herein, Cs 4 PbBr 6 /CsPbBr 3 with good stability was successfully prepared by controlling the synthesis temperature to 100 ° C. The fluorescence intensity of Cs 4 PbBr 6 /CsPbBr 3 exhibited 2,4-dinitriphenylhydrazine (DNPH) concentration-dependent characteristics and could be used for sensing DNPH based on the dynamic quenching process triggered by the collision between Cs 4 PbBr 6 /CsPbBr 3 and DNPH. A good linear model was established based on the detection signal and DNPH concentration in the range of 0.05∼30 mg/L and the detection limit was 0.033 mg/L. This method was applied to detect DNPH in soil and tap water samples with satisfactory results obtained. Therefore, this research broadens the application of Cs n PbBr 2+ n in the field of quantitative detection and is expected to be developed into a fluorescent sensor for the detection of hydrazine substances.
研究领域:
分析化学
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材料科学
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环境监测
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传感器技术
·
光电子学
✓ 已验证
DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2018
·Vol. 35
·期 4
·1700471
·
IF 4.384
Shanliang Song,Chuanxi Wang,Yue Zhao,Tantan Hu,Xinxin Zhou,Tianxin Zhao,Minghui Yang,Quan Lin
A dual-emission ratiometric fluorescent sensing film for metal ion detection is designed. This dual-emission film is successfully prepared from chitosan, graphitic carbon nitride (g-C 3 N 4 ), and gold nanoclusters (Au NCs). Here, it is shown that the g-C 3 N 4 not only serves as the fluorescence emission source, but also enhances the mechanical and thermal stability of the film. Meanwhile, the Au NCs are adsorbed on the surface of chitosan film by the electrostatic interaction. The as-prepared dual-emission film can selectively detect Cu 2+ , leading to the quench of red fluorescence of Au NCs, whereas the blue fluorescence from g-C 3 N 4 persists. The ratio of the two fluorescence intensities depends on the Cu 2+ concentration and the fluorescence color changes from orange red to yellow, cyan, and finally to blue with increasing Cu 2+ concentration. Thus, the as-prepared dual-emission film can be worked as ratiometric sensing paper for Cu 2+ detection. Furthermore, the film shows high sensitivity and selectivity, with low limit of detection (LOD) (10 ppb). It is observed that this novel gold-cluster-based dual-emission ratiometric fluorescent sensing paper is an easy and convenient way for detecting metal ions. It is believed that this research work have created another avenue for the detection of metal ions in the environment.
研究领域:
分析化学
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环境科学
·
材料科学
·
纳米技术
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生物传感器
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环境监测
·
分子探针
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2017
·
IF 2.299
Xiu-Li Wang,Xiao-Mei Wu,Guo-Cheng Liu,Qiao-Min Li,Hong-Yan Lin,Xiang Wang
By tuning metal ions and combining with different dicarboxylates , four new semi-rigid thiophene-bis-pyridyl-bis-amide-based coordination polymers , namely, [Zn(3-bptpa)(1,3-BDC)]·DMA·2H 2 O ( 1 ), [Zn(3-bptpa)(5-MIP)] ( 2 ), [Cd(3-bptpa)(1,3-BDC)]·2H 2 O ( 3 ) and [Cd(3-bptpa)(5-MIP)]·4H 2 O ( 4 ) (3-bptpa= N,N′ -bis(pyridine-3-yl)thiophene-2,5-dicarboxamide, 1,3-H 2 BDC=1,3-benzenedicarboxylic acid, 5-H 2 MIP=5-methylisophthalic acid, DMA= N,N -dimethylacetamide), were solvothermally/hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction analyses, IR spectra , UV–vis diffuse-reflectance spectra (DRS), powder X-ray diffraction (PXRD) and thermal gravimetric analyses (TG). The structural analysis reveals that Zn-complexes 1 and 2 are similar 2D networks. While Cd-complexes 3 and 4 exhibit similar 2-fold interpenetrating 3D α -Po frameworks with the (4 12 ·6 3 ) topology. The photocatalytic properties for the degradation of methylene blue (MB) under ultraviolet light irradiation of the title complexes have been investigated in detail. Furthermore, the luminescent sensing behaviors for metal cations of 1–4 have been studied, the results indicate that 3 is an excellent fluorescent probe , with high sensitivity, selectivity , and simple regeneration, for environmentally relevant Fe 3+ ions.
研究领域:
无机化学
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材料化学
·
配位化学
·
环境分析
·
光催化
·
荧光传感
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Menghua Liu,Shuangying Li,Zhi Li,Yanhui Li,Yue Zhang,Jingwen Niu,Linchun Nie,Chunmao Chen,Qingxiang Zhou
Amoxicillin is one of the most important semi-synthetic penicillin broad-spectrum β-lactam antibiotics and has achieved many applications. There are few reports on its application for synthesizing carbon dots (CDs). Present work explored the possibility of amoxicillin converted into CDs with sodium carbonate used as the co-reactant employing facile hydrothermal method. The obtained CDs exhibited good selectivity and sensitivity to benzidine and could be explored as an effective fluorescence probe for monitoring benzidine. The fluorescence intensity of CDs was quenched based on the principle of static quenching due to the formation of a non-fluorescent complex between CD and benzidine. Within the range of 0.2–2 μM and 2–16 μM, CDs possessed good linear characteristics, high sensitivity, and a low detection limit of 0.08 μM. The results demonstrated that the fluorescence probe possessed the merits of simplicity, rapidity, low cost, short analytical time, high selectivity and sensitivity, and good stability. According to the verification results from the real water samples, the fluorescence probe had high reliability and feasibility, and could be employed for monitoring benzidine in waters.
研究领域:
分析化学
·
环境监测
·
纳米材料
·
荧光传感
·
药物化学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Lixia Gao,Cuicui Deng,Jie Xiong,Panpan Zhu,Qian Chen,Kejun Tan
In this work, a simple, sensitive and cost-effective ratiometric fluorescence probe was developed for visual sensing of aluminum ion based on the Chelation-Enhanced Photoluminescence (CHEP) of ciprofloxacin (CIP). In weak basic medium, CIP can sensitize Eu 3+ to emit red fluorescence based on antenna effect, and Al 3+ can enhance the blue fluorescence of CIP via CHEP. When Al 3+ was added, the CIP fluorescence intensity increased and the red fluorescence intensity decreased. And the ratiometric fluorescence intensity is proportional to the content of Al 3+ , and then the ratiometric fluorescence assay and visual sensor of Al 3+ have been proposed. The ratiometric fluorescence assay exhibits good selectivity and sensitivity with a limit of detection (LOD) of 0.60 μmol/L and a linear range of 0.6–120 μmol/L. Fluorescence lifetime , scanning electron microscopy (SEM) images, Fourier transform infrared (FTIR), UV–Visible absorption (Abs) spectra and X-ray photoelectron spectra (XPS) were characterized for the mechanism study. The proposed method has been successfully applied for Al 3+ sensing in real samples with a recovery of 99.46%–105.42% and RSD ≤ 3.03%.
研究领域:
分析化学
·
环境监测
·
荧光传感
·
材料科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 44
·期 37
·16528-16533
·
IF 4.197
Z. C. Liu,W. P. Zhu,Y. H. Chen,Y. X. Li,Y. J. Ding,W. J. Yang,K. Li
In this paper, a simple small molecule (L) based on 4-(diethylamino)-2-hydroxy-benzaldehyde and carbohydrazide has been synthesized and characterized. Moreover, under ultrasonic conditions, a host–guest system with β-cyclodextrin and L was obtained. According to the hybridization process, the host–guest system showed excellent water solubility. The investigation of the fluorescence spectra revealed that the host–guest system exhibited a characteristic fluorescence behavior toward Al3+ in a pure water environment. Upon addition of Al3+, the host–guest system showed a strong blue fluorescence, which resulted from the fluorophore of L after the coordination of β-CD–L and Al3+ with a high binding constant (k = 3.1626 × 1011 M−1). In addition, SEM images demonstrated that the host–guest system expressed good crystallization behavior. Fluorescence microscope images of onion epidermal cells with β-CD–L–Al3+ proved that the water-soluble host–guest system possessed a high ability for cell permeability.
研究领域:
分析化学
·
超分子化学
·
荧光传感
·
环境监测
·
生物成像
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2014
·Vol. 42
·期 8
·1131-1135
·
IF 0.7
Hui-Zhi LI,Tao ZHAI,Guang-You ZHANG,Mei-Shan PEI
A novel fluorescence switch was constructed based on poly 3-{[1-(2-hydrazino-2-oxoethyl) piperidin-4-ylidene]methyl} thiophene (PMTH) in the presence of Pb 2+ and S -adenosylmethionine (SAM). The fluorescence of PMTH solution can be efficiently quenched by Pb 2+ ions, resulting in a “fluorescence off” state. Upon the addition of SAM, a strong Pb 2+ chelator, to Pb 2+ -PMTH solution, fluorescence of PMTH can be restored, leading to fluorescence “on”. Based on this fluorescence switch characteristics of PMTH, a new method for recognition and determination of SAM was established. By investigating the fluorescence spectral characteristics of Pb 2+ -PMTH and Pb 2+ -SAM complexes in H 2 O/CH 3 CH 2 OH (4:1, V/V ) solution, we found this method offered advanced sensitivity and selectivity for detecting SAM in the presence of common amino acids and metal ions. Under optimum conditions, the relative fluorescence intensity exhibited a linear relationship with SAM concentration in the range of 1.0 × −8 –2.0 × 10 −6 M. The regression equation was Δ 68.51 + 72.32 C (μith a correlation coefficient r = 0.9982. The limit of detection was 8.72 × 10 −9 M. The method was successfully applied in the detection of SAM in real samples.
研究领域:
分析化学
·
高分子科学
·
荧光传感
·
生物分析化学
·
环境监测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）