MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 1
·1-7
·
IF 6.232
Fan Chuan,Lv Xiaoxia,Tian Meng,Yu Qingcai,Mao Yueyuan,Qiu Wanwei,Wang Hua,Liu Guodong
A terbium(III)-functionalized zinc(II)-organic framework (Tb-MOF-Zn) is shown to be a viable fluorescent probe for phosphate. The organic ligands 4,4′,4″-[((2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene))tris(oxy)]tribenzoic acid (H 3 L 3 ) contains multiple carboxyl groups that can react with zinc(II) to yield tubular MOF-Zn. The MOF-Zn was further functionalized with Tb(III) to produce a lanthanide composite of type Tb-MOF-Zn which displays strong fluorescence with excitation/emission maxima at 285/544 nm. Fluorescence is quenched by phosphate because of the specific interaction with Tb(III) in Tb-MOF-Zn. The concentration of Tb-MOF-Zn, reaction time and pH value of the solution were optimized. Fluorescence drops linearly in the 0.01 to 200.0 μM phosphate concentration range, and the detection limit is 4.0 nM. The fluorescent probe was also used to prepare a microdot array on a glass slide for visual detection of phosphate under illumination with UV light.
A terbium(III) functionalized zinc(II)-organic framework was synthesized and used as fluorescent probe for determination of phosphate ions.
研究领域:
分析化学
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材料科学
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PubMed
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 7
·2275-2280
·
IF 4.58
Chen Muhua,Zheng Yuhui,Gao Jinwei,Li Chen,Yu Chufang,Wang Qianming
A hybrid organic-inorganic optical probe was developed by using silylated precursors (including tetraethoxy silane and aminopropyltriethoxysilane), ferroferric oxide (Fe 3 O 4 ) and lanthanide coordination units. Cross-linking condensation warrants chemical stability. The shape and size of the resulting nanoparticles can be adjusted to around 40–60 nm. On photo-excitation at 313 nm, they display green fluorescence (peaking at 545 nm) which is strongly enhanced on addition of dopamine in tris-buffer solution (pH = 8.5). Spectroscopic studies demonstrate that this assay exhibits good selectivity for dopamine and has a 0.82 μM detection limit. The hybrid structures can be separated and recycled due to the magnetic properties of Fe 3 O 4 . The feasibility of dopamine analysis in human serum sample has been assessed.
Schematic presentation of a terbium organic-inorganic material whose fluorescence is selectively enhanced by dopamine. The material can be repeatedly used because it can be regenerated by treatment with acids and magnetic separation.
研究领域:
分析化学
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生物医学工程
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高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Jun Ye,Mingming Zhang,Jian Xiong
A novel, rapid, high selective and sensitive probe, carboxymethyl cellulose (CMC)/Tb(III) with green fluorescence, for detecting Mn 2+ in aqueous solution during pH = 4–10 was proposed in this work. The probe’s synthesis had benefits of mild reaction condition, organic solvent-free and facile operation. A linear relationship between the fluorescence intensity of CMC/Tb(III) probe at 544 nm with 0.046 μM detection limitation and the concentration of Mn 2+ in the range of 0.1–100 μM was obtained. The probe was also used to detected Mn 2+ in tap water and the recoveries were between 97.10% and 101.61%, and the relative standard deviations (RSD, n = 5) of all samples were less than 2.04%. The results by UV absorption spectrum and fluorescence quenching suggested that there might be a dynamic quenching occurred to the fluorescence of CMC/Tb(III) probe when Mn 2+ was involved.
研究领域:
分析化学
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环境科学
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材料科学
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高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 7
·1-8
·
IF 5.705
Sun Chongmei,Yuan Fangzheng,Li Huihui,Wu Xia
A nanoprobe was developed for the fluorometric determination of the neurotransmitter dopamine (DA). It is based on the synergistic enhancement action of citrate and gold nanoparticles (AuNPs) on the luminescence of Tb(III). AuNPs serve as substrates of surface enhanced fluorescence (SEF). Citrate, in turn, acts as a spacer for the SEF effect, a co-ligand of Tb(III) complex, and a recognizing component for DA. The synergistic action of citrate and AuNPs significantly increases the intrinsic green fluorescence of Tb(III) (best measured at excitation/emission peaks of 300/547 nm). Under the optimum conditions, the fluorescence intensity increases linearly in the 3.0 to 200 nM DA concentration ranging (with an R 2 value of 0.9959), and the limit of detection (at S/N = 3 ) is 0.84 nM. The nanoprobe shows good selectivity for DA among other interfering neurotransmitters, some amino acids and ions. The method was applied to the detection of DA in human serum samples where it gave recoveries ranging from 100.5 to 102.9%.
Schematic of a Tb(III) composite fluorescent nanoprobe for the sensitive determination of dopamine (DA). Citrate and gold nanoparticles (AuNPs) synergistically enhance the fluorescence of Tb(III)-DA.
研究领域:
分析化学
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生物医学工程
·
神经科学
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 9
·4472-4477
·
IF 3.3
Chujing Yang,Zhiwei Zhang,Jingqi Chen,Xinying Zhang,Yankai Dai,Xuyi Li,Yingying Chen,Jiaqiang Xu,Lingyan Feng
We found that the complexes of nucleotides and terbium(III) exhibit circularly polarized luminescence (CPL). The CPL of GMP/Tb/Ag coordination polymer nanoparticles (CPNs) was converted by a magnetic field and pH. The CPL of the purine nucleobase of nucleotides was opposite to that of the pyrimidine nucleobase. GMP/Tb/Ag CPNs could be used as advanced safety coatings and acid–base switches, and Tb/Ag could be used as CPL probes for rapid differentiation of nucleotides, which provided ideas for multiple transformations and applications of CPL.
研究领域:
生物化学
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材料科学
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光学
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高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Xie He,Yong Han,Xueli Luo,Weixia Yang,Chunhua Li,Wenzhi Tang,Tianli Yue,Zhonghong Li
A ratiometric fluorescence (FL) sensor was fabricated by coordinating 2, 6-pyridinedicarboxylic acid (DPA) sensitized Tb 3+ (Tb-DPA) with NH 2 and COOH on the surface of the N -doped carbon dots ( N -CDs) for detecting Hg 2+ in seafood. The sensor exhibited two FL emissions at 436 nm ( N -CDs) as the response signal and at 543 nm (Tb-DPA) as the reference signal when excited at 290 nm. After adding Hg 2+ , the FL emission at 436 nm was significantly quenched and the FL emission at 543 nm was negligibly changed. The electron transfer (ET) between COO − of N -CDs and Hg 2+ led to the FL quenching of N -CDs. The FL ratio (F 436 /F 543 ) exhibited a good linear relationship in the Hg 2+ concentrations of 1 161.51 μM with a low limit of detection (LOD) of ~37 nM. The sensor presented high selectivity, satisfactory accuracy and precision toward Hg 2+ in seafood with recoveries of 86.45–114.47% and RSDs of 0.20–1.92%.
研究领域:
分析化学
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环境科学
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食品科学
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PubMed
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 6
·945-952
·
IF 3.1
Xiaoyang Zhao,Jianfeng Wu,Wei Tian
Folic acid (FA), as a water-soluble vitamin B compound, plays an irreplaceable role in human health. It is crucial to detect FA in a rapid, efficient, and sensitive way. In the current study, we constructed a fluorescence coordination polymer (CP) from TbIII and pyridine-2,6-dicarboxylic acid (H2pda) to detect folic acid. Single crystal X-ray diffraction indicated that the complex contained a one-dimensional (1D) double-chain structure, which assembled into a three-dimensional (3D) supramolecular framework via the inter-chain hydrogen bonds. Interestingly, the crystal size of the complex was optimized up to 2.4 mm through L9(34) orthogonal experiments. The complex exhibited typical TbIII fluorescence, which could detect FA with high detection sensitivity (LOD = 0.22 μM), an excellent anti-interference ability, and remarkable recyclability in aqueous solution through fluorescence quenching of the emission spectra. Fluorescence quenching is related to the competition absorption (CA) and photoinduced electron transfer (PET) process between the complex and FA, which is inspected by density functional theory (DFT) calculations.
研究领域:
化学
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生物分析
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材料科学
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高影响因子
LUMINESCENCE
·
2019
·Vol. 35
·期 2
·274-283
·
IF 1.691
Man Tang,Bo-Tao Zhang,Yanguo Teng,Meilin Liu,Yang Zhang
Based on the chemiluminescence (CL) phenomenon of peroxymonosulfate (PMS) and Tb(III) enhanced by its ligand in a micelle microenvironment, a fast and sensitive flow injection CL method for PMS detection was proposed and applied to the analysis of different samples and PMS decomposition. Under the optimized conditions, a linear range was obtained from 4.0 × 10 –6 mol L –1 to 2.0 × 10 –4 mol L –1 with a high correlation coefficient ( r = 0.9997), detection limit of 5.0 × 10 –7 mol L –1 (S/ N = 3) and relative standard deviation of 2.4% for 1.0 × 10 –5 mol L –1 PMS ( n = 9). This was successfully applied to the determination of PMS in Virkon powder, tap water, and swimming pool water samples with satisfactory recoveries from 94.8% to 104.8% . In particular, the analytical frequency could be as fast as five samples per minute because there was no reaction step before analysis and the CL phenomenon was instantaneous. Therefore, this CL method has also been successfully applied to investigate the PMS decomposition profiles in carbon material (carbon nanotubes, carbon nanofibres, activated carbon and graphene oxide) catalysis systems, which followed pseudo-first-order kinetics with good correlation coefficients ( r > 0.9305). Quenching experiments and electron spin resonance spectra verified that the CL phenomenon was due to the formation of singlet oxygen, and that hydroxyl and sulfate radicals might be important in the generation of singlet oxygen. Tb(III) is the luminescent emitter according to the characteristics emission bands of the fluorescence and CL spectra in different media.
研究领域:
分析化学
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环境科学
·
材料科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2010
·
IF 1.566
Hongqi Chen,Cailing Zhou,Lun Wang,Jingguo Chen,Bo Ling,Jie Fu
The sensitized fluorescence intensity of the terbium (III) ion can be notably enhanced in the presence of sodium hexametaphosphate (SHMP). Based on this, water-soluble Tb-SHMP chelate complexes were synthesized in aqueous solutions, and characterized by spectrofluorometry. 6-Mercapto-5-triazole[4,3-b]-S-tetrazine was generated by the quantitative reaction of HCHO with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole under alkaline conditions at room temperature . The spectral overlap between the emission of Tb-SHMP chelate complexes and absorption of 6-mercapto-5-triazole[4,3-b]-S-tetrazine meets the prerequisite for fluorescence energy transfer . Based on this, a novel efficient fluorescence energy transfer system between Tb-SHMP chelate complexes as donor and 6-mercapto-5-triazole[4,3-b]-S-tetrazine as acceptor was developed for the determination of HCHO in aqueous solutions. Under the optimal experimental conditions, this method is capable of detecting HCHO concentrations from 2.06 × 10 −5 to 6.18 × 10 −3 mg mL −1 and the limit of detection was 7.11 × 10 −6 mg mL −1 . Compared with other general methods for the determination of HCHO, the proposed method improved the sensitivity and selectivity. Moreover, the proposed method was successfully applied to the determination of HCHO in water samples.
研究领域:
分析化学
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环境科学
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 7
·1375-1381
·
IF 3.286
Sun Chongmei,Shen Jin,Cui Rongwei,Yuan Fangzheng,Zhang Hui,Wu Xia
A sensitive fluorescent analytical method for the detection of dopamine (DA) was developed based on surface-enhanced Tb(III)/La(III) co-luminescence using silver nanoflowers (AgNFs). Anisotropic AgNFs show strong surface-enhanced fluorescence effect owing to the abundant sharp tips. Tb(III)/La(III)-DA complexes mainly bind to the sharp tips of AgNFs and thus shorten the distance between the complexes. The shortened distance gives rise to obvious surface-enhanced Tb(III)/La(III) co-luminescence effect. In this work, AgNFs offer many superior properties, such as enhanced intrinsic green fluorescence of Tb(III) ( λ ex / λ em = 310/546 nm), increased fluorescence lifetime, and improved energy transfer efficiency. Under the optimum conditions, the fluorescence intensity is linearly correlated with the concentration of DA in the range of 0.80–10 nM ( R 2 = 0.9970), and the detection limit is 0.34 nM ( S/N = 3). The fluorescent nanoprobe was successfully applied to the determination of DA in human serum samples with recoveries ranging from 99.1 to 102.6%.
Graphical abstract
研究领域:
分析化学
·
生物医学工程
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PubMed
高影响因子
Magnetochemistry
·
2022
·Vol. 8
·期 7
·73
·
IF 3.336
Dianjun Hu,Xiaoying Li,Lixuan Zhang,Ilya Snetkov,Penghui Chen,Zhengfa Dai,Stanislav Balabanov,Oleg Palashov,Jiang Li
As a result of preliminary air calcination and subsequent reduction in a flowing NH3atmosphere of the precursor from the liquid precipitation method for the first time, pure-phase Tb2O3powder with an average particle size of 135 nm was prepared. The Tb2O3magneto-optical transparent ceramics with the average grain size of 1.3 μm were successfully fabricated by vacuum pre-sintering and hot isostatic pressing post-treatment from the as-synthesized Tb2O3powder. In-line transmittance values of Tb2O3ceramics reach 70.3% at 633 nm, 78.1% at 1064 nm, and 79.4% at 1400 nm, respectively. Thanks to the high intrinsic concentration of Tb3+, Tb2O3ceramics present high Verdet constants of −427.3 and −123.7 rad·T−1·m−1at 633 and 1064 nm, which are about 3.1 and 3.4 times higher than those of commercial Tb3Ga5O12crystals, respectively. Due to the excellent magneto-optical properties, Tb2O3ceramics are promising candidates for the development of Faraday isolator toward compaction used in visible and near-infrared bands.Keywords:Tb2O3transparent ceramics;liquid precipitation;two-step sintering;magneto-optical properties
研究领域:
材料科学
·
光学工程
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Qi Hu,Si Chen,Fang Chen
Based on the thiourea quenching of the chemiluminescence of Tb 3+ / prulifloxacin (PUFX) sensitized KMnO 4 -Na 2 SO 3 system, a convenient and rapid chemiluminescence method for the determination of thiourea was proposed. The reaction between KMnO 4 and Na 2 SO 3 brought only weak chemiluminescence, but the chemiluminescence increased sharply in the presence of sensitizer Tb 3+ / PUFX. Addition of thiourea can prevent the reaction between KMnO 4 and Na 2 SO 3 , thus the chemiluminescence intensity was significantly decreased. Under the optimum conditions, the calibration graphs for thiourea were linear in the range of 1.0 × 10 -7 to 4.0 × 10 -5 mol•L -1 . The limit of detection was 6.4 × 10 -8 mol•L -1 . The method was applied satisfactorily to the determination of thiourea in tap water, lake water and rice noodles and the spiked recoveries were between 104.7 ~ 113.4%. The possible mechanism of sensitization and quenching was also proposed.
研究领域:
分析化学
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环境科学
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高影响因子
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