MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Meng-Xia Huang,Jia-Ping Lai,Hui Sun,Wei-Zhen Wu
A simple, highly selective and ultra-sensitive “off-on-off” fluorescent chemosensor L for successive detection of Al 3+ and PO 4 3 − was synthesized and characterized. Sensor L showed a remarkable and highly selective fluorescence enhancement towards Al 3+ against other interfering cations, owing to the suppression of intramolecular charge transfer (ICT) mechanism and CH N isomerization . A good linear relationship (R 2 = 0.9974) was obtained between the fluorescence emission intensity of L and the concentration of Al 3+ (0.025–2.0 μM) with the detection limit of 3.8 nM, which is much lower than the most literature reported. And the binding stoichiometry between L and Al 3+ is 1:1 according to Job's Plot and ESI-MS. The resultant complex can be further utilized as a secondary probe for determination of PO 4 3 − with the detection limit as low as 0.56 μM. Meanwhile, the sensor L was successfully applied to detect Al 3+ in real water, illustrating that sensor L was a promising alternative route for Al 3+ detection. Additionally, the sensing mechanism of L to Al 3+ was further demonstrated in detail by IR and 1 H NMR titration experiment. The successive recognition feature of sensor L has the potential to quantitative analysis of Al 3+ and PO 4 3 − in environment samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 14
·2398
·
IF 5.719
Chunhui Song,Qifa Song,Ziyou Ding,Yingchao Han
In this study, we synthesized polyacrylic acid (PAA)-Ca (Eu) nanoclusters as a luminescence sensor of phosphate ion by a complex method, and we aimed to achieve the quantitative detection of PO43−based on the sensitivity of the charge transfer band of Eu3+to anionic ligand. The resulting PAA-Ca(Eu) nanoclusters showed a well-dispersed and a dot-like morphology, with an ultra-small diameter (the average size of 2.17 nm) under high resolution transmission electron microscopy(HRTEM) observation. A dynamic light scattering particle size analyzer (DLS) showed a hydrodynamic size of 2.39 nm. The (PAA)-Ca (Eu) nanoclusters as a luminescence sensor showed a significantly higher sensitivity for PO43−than other anions (CO32−, SiO32−, SO42−, SO32−, Br−, Cl−, F−). The luminescence intensity displayed a linear increase (y = 19.32x + 74.75, R2> 0.999) in a PO43concentration range (0–10 mM) with the concentration of PO43−increase, and the limit of detection was 0.023 mM. The results showed good recovery rates and low relative standard deviations. These (PAA)-Ca (Eu) nanoclusters are hopeful to become a luminescence sensor for quantitatively detecting PO43−.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2014
·Vol. 26
·期 12
·2710-2715
·
IF 2.502
Qi-Le Li,Ning Bao,Shou-Nian Ding
Phosphate anions are determined based on the electrochemiluminescence (ECL) of CdSe quantum dots (CdSe QDs) capped with 3-mercaptopropionic acid. The ECL gets quenched with the introduction of Eu 3+ ions, but it is restored on the further addition of phosphate anions. The sensing mechanism might be due to the strong and specific interaction between phosphate anions and the Eu 3+ ions, leading to the releasing of CdSe QDs from aggregates. On the basis of the quenching/recovery ECL behaviors, the ECL sensor offer acceptable sensitivity, high selectivity, and a linear response from 0.1 to 120 µM with a detection limit of 0.03 µM (3δ) for phosphate anions.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Chen Ling,Zixi Ren,Mengmeng Wei,Fei Tong,Yuwei Cheng,Xiaopeng Zhang,Fuqiang Liu
Inorganic complexants, such as ammonia (AA) and pyrophosphate (PP), are often present alongside heavy metal ions in alkaline plating rinsing wastewater. We investigated the removal capacity of Ni(II) from waters containing [Ni-xNH 3 -yP 2 O 7 ] n complexes by chelating and ion-exchange resins in sole and dual-ligand systems. D463 (containing iminodiacetic groups) and PAMD (possessing polyamine groups) exerted superior performance under all conditions. Ni(II) adsorption on D463 decreased with AA and PP by 10.3% and 64.4%, respectively. Conversely, the adsorption on PAMD increased by 57.3% and 75.8%, respectively. PAMD exhibited high selectivity toward anionic [Ni-PP] species over free PP. More Ni(II) was captured by PAMD in the dual-ligand systems than sole systems, while the case for D463 was opposite. As confirmed by species tracking and DFT/XPS analyses, complexes breaking-Ni 2+ capture was the dominant mechanism for D463, while the dual-site (non-charged and protonated amines) interactions with NiP 2 O 7 2– on PAMD promoted its adsorption. The tandem combination D463-PAMD was the optimal mode to remove the most Ni(II). The actual wastewater test demonstrated that >210 BV effluent met the limit of 0.1 mg Ni(II)/L and the eluent contained 15 g Ni(II)/L. This study guides the application of chelating adsorption processes in the advanced treatment of plating rinsing wastewaters.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ANALYST
·
2011
·Vol. 137
·期 4
·953-958
·
IF 3.913
Li Jiao Liang,Xi Juan Zhao,Cheng Zhi Huang
Pyrophosphate ion (PPi) is crucial in varieties of biological processes and industrial applications, and thus it is very important how to recognize it with high selectivity. In this contribution, one terpyridine (tpy)-based fluorescent molecule, 4-(methylphenyl)-2,2′:6′,2′′-terpyridine (mptpy), has been reported to display a highly selective recognition for PPi in the presence of Zn(II). After exposure toward the Zn(II) ion, the characteristic emission of mptpy at 376 nm red-shifted to 406 nm with a strong enhancement upon an excitation at 280 nm, and then blue-shifted to 388 nm with the further addition of PPi. Absorption and fluorescence measurements showed that other phosphates including phosphate (Pi) as well as nucleotide triphosphates could not induce the spectral changes similar to PPi, demonstrating the unique binding effect between mptpy-Zn(II) and PPi. This process could also discriminate PPi from other inorganic anions. Therefore, a tpy-based fluorescence method for the highly selective recognition of PPi could be developed.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2015
·
IF 2.752
Lili Chen,Yanan Ye,Hongliang Tan,Yulin Wang
A simple, and reliable colorimetric detection method for manganese ion (Mn 2+ ) based on pyrophosphate capped silver nanoparticles (P 2 O 7 4− -AgNPs) is developed. The P 2 O 7 4− -AgNPs was synthesized by wet chemical method. The P 2 O 7 4− -AgNPs solution shows a yellow color and the maximum absorption at 403 nm can be observed. After the addition of Mn 2+ , the absorption intensity of the P 2 O 7 4− -AgNPs solution decreased drastically, which associated with the changes of solution color from yellow to purple. The observed changes can be attributed to the aggregation of AgNPs induced by Mn 2+ because of the ion-templated chelating reaction. The absorption intensity of P 2 O 7 4− -AgNPs at 403 nm is found to be proportional to the concentration of Mn 2+ in the range of 0.03–20 μM, and the detection limit for Mn 2+ is as low as 0.03 μM (S/N = 3). Due to high affinity toward Mn 2+ , the P 2 O 7 4− -AgNPs as a colorimetric sensor displays an excellent selectivity for Mn 2+ detection. More important, the proposed method was successfully applied in the determination of Mn 2+ in real environmental samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zequan Liu,Tao Ou,Minhua Su,Hairong Peng,Gang Song,Lingjun Kong,Diyun Chen
Uranium and uranium-containing pollutants are excessively released into the environment, leading to serious water and soil contamination. Minerals such as alumina are naturally abundant and frequently affect the fate and migration behavior of uranium ions. A thorough understanding of the migration and immobilization behavior of uranium on Al-rich minerals (e.g., α-alumina [α-Al 2 O 3 ] and γ-alumina [γ-Al 2 O 3 )]) is essential for unraveling numerous environmental issues. We performed a systematic comparative analysis of U(VI) retention by α-/γ-alumina. The effects of coexisting ions and natural organic matter were explored. Solution pH contributed critically to the retention of U(VI) by α-/γ-alumina. The adsorption rate of γ-Al 2 O 3 for U(VI) removal was faster than that of α-Al 2 O 3 , reaching equilibrium within 15 min with a high removal efficiency of 94.43%. PO 4 3− ions significantly promoted U(VI) adsorption, especially for the case of α-Al 2 O 3 . The addition of phosphate resulted in a 15-fold enhancement in adsorption capacity. Humic acid promoted U(VI) removal by γ-Al 2 O 3 under acidic conditions while strong inhibition on both α-Al 2 O 3 and γ-Al 2 O 3 in basic conditions. The removal mechanism of U(VI) by alumina is mainly ascribable to electrostatic interaction and surface complexation from various oxygenated functional groups. The present findings are pivotal to the understanding of uranium migration and immobilization in the environment.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2020
·
IF 7.333
Zhihao Wu,Huan Yang,Shuang Pan,Hui Liu,Xiaoli Hu
Ratiometric fluorescence has drawn extensive attention owing to its self-calibration property. However, it is difficult to obtain appropriate fluorescent materials that can be excited under one excitation and possess well-resolved signals simultaneously. In this work, with the optical properties of the fluorescence of carbon dots (CDs) and the second-order scattering (SOS) of ZIF-90 (zeolitic imidazole frameworks-90) nanoparticles, the synthesized CDs@ZIF-90 can be applied to phosphate (PO43–) ratiometric detection. The fluorescence of CDs is greatly suppressed through encapsulating CDs into ZIF-90. Nevertheless, the SOS is quite obvious due to the high scattering intensity of large size ZIF-90. The competitive coordination between PO43– and the metal node of ZIF-90 decomposes CDs@ZIF-90, leading to the restoration of fluorescence and the diminution of SOS. On the basis of the PO43–-induced ZIF-90 decomposition and CD release, a novel method for PO43– ratiometric detection is developed through the dual-signal response of the fluorescence scattering. Under the optimal condition, the method shows a linear range from 1.0 to 50.0 μmol L–1 with a detection limit of 0.23 μmol L–1. Furthermore, the probes are employed to assess PO43– in practical aqueous samples successfully. Compared with the traditional approach, which only records fluorescence signals, the method reported here provides a new strategy to design ratiometric sensors by fluorescence and scattering.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Shengling Li,Duanlin Cao,Xianjiao Meng,Zhiyong Hu,Zhichun Li,Changchun Yuan,Tao Zhou,Xinghua Han,Wenbing Ma
In this study, a highly selective fluorescent sensor ( E )-2-((2-(benzo[ d ]thiazol-2-yl)quinolin-8-yl)oxy)- N ′ -((7-(diethylamino)-2-oxo-2 H -chromen-3-yl)methylene)acetohydrazide ( TQC ) was synthesized from 2-methylquinolin-8-ol and 4-(diethylamino)-2-hydroxybenzaldehyde and its structure was characterized by 1 H NMR, 13 C NMR, ESI-HR-MS and density functional theory (DFT) calculation. Sensor TQC showed an obvious “on-off-on” fluorescence response to Cu 2+ and PPi in a DMSO/HEPES (3:2 v/v, pH = 7.4) buffer system. The detection limits of sensor TQC were 0.06 μM to Cu 2+ and 0.01 μM to PPi. In addition, sensor TQC showed a 1:1 binding stoichiometry to Cu 2+ and TQC- Cu 2+ complex showed a 2:1 binding stoichiometry to PPi. The optimum pH range of sensor TQC and TQC- Cu 2+ was 3–8. Further studies demonstrated that sensor TQC could be made into test paper strips for the qualitative of Cu 2+ and PPi and showed sequentially “on-off-on” fluorescent bio-imaging of Cu 2+ and PPi in HeLa cells.
研究领域:
分析化学
·
生物医学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2015
·
IF 3.545
Haiyan Cao,Zhaohui Chen,Yuming Huang
This paper reports an “off-to-on” fluorescence (FL) probe for sensitively and selectively detecting phosphate ions (Pi's). Fabrication of the probe was based on the competition between Pi's and tannic acid-stabilized copper nanoclusters (TA-Cu NCs) for Eu 3+ binding. The addition of Eu 3+ ions to TA-Cu NCs triggered the aggregation of TA-Cu NCs, which quenched the FL of TA-Cu NCs. After Pi addition, the aggregated TA-Cu NCs solubilized into the aqueous solution to facilitate the Pi-triggered dispersion of TA-Cu NCs. This phenomenon was due to the stronger binding ability between Pi's and Eu 3+ than that between TA and Eu 3+ , leading to FL recovery of Cu NCs. The degree of redispersion of TA-Cu NCs was directly related to Pi concentration. Thus, Pi concentration can be quantitatively determined by the change in FL of the TA-Cu NCs dispersion. Under the optimized conditions, the change in FL presented a linear relationship with Pi concentration from 0.07 μmol L −1 to 80 μmol L −1 . The limit of detection for Pi was 9.6×10 −3 μmol L −1 at a signal-to-noise ratio of 3. For Pi determination in real samples, only 1 mL water sample was needed. The proposed probe was highly sensitive, free from the interference of other common species in aqueous media, and particularly useful for the fast and simple diagnosis of water-eutrophication extent.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2017
·
IF 2.536
Xu Tang,Yun Wang,Juan Han,Liang Ni,Lei Wang,Longhua Li,Huiqin Zhang,Cheng Li,Jing Li,Haoran Li
A simple relay identification fluorescence probe for Fe 3 + and phosphate anion with “on-off-on” switching was designed and synthesized based on the phenylthiazole and biphenylcarbonitrile. Probe 1 displayed highly selective and sensitive recognition to Fe 3 + in HEPES aqueous buffer (EtOH/H 2 O = 2:8, v/v, pH = 7.4) solutions. The optimized structures and HOMO and LUMO of probe 1 and [1-Fe 3 + ] complex were obtained by the density functional theory (DFT) calculations with B3LYP as the exchange and correlation functional using a suite of Gaussian 09 programs. The [1-Fe 3 + ] complex solution also showed a high selectivity toward PO 4 3 − . The lower limits of detection of probe 1 to Fe 3 + and [1-Fe 3 + ] complex to PO 4 3 − were estimated to 1.09 × 10 − 7 M and 1.86 × 10 − 7 M. Besides, the probe 1 also was used to detected the target ions in real water sample and living cells successfully.
研究领域:
分析化学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Jinyan Du,Ying Yang,Taili Shao,Shuangqing Qi,Ping Zhang,Shujuan Zhuo,Changqing Zhu
A simple “OFF-ON” fluorescent system was proposed for selective and sensitive detection of ferric ion (Fe 3+ ) and pyrophosphate (PPi) in living cells. The method was constructed based on the bright yellow emission of carbon dots (y-CDs), which were prepared using o -phenylenediamine (OPD) as the precursor via a facile hydrothermal treatment. The as-obtained y-CDs, with an average size of 2.6 nm, exhibited an excitation-independent emission peak at 574 nm. The fluorescence of y-CDs can be remarkably quenched by Fe 3+ with high selectivity and sensitivity. Interestingly, the quenched fluorescence can be recovered regularly upon addition of PPi, showing a promising detection for PPi. The linear ranges for Fe 3+ and PPi detections were 0.05–80 and 0.5–120 μM, respectively, and the corresponding limit of detections (LODs) were 22.1 and 73.9 nM. As we proved the y-CDs have negligible cytotoxicity and excellent biocompatibility, further application to the fluorescence imaging of intracellular Fe 3+ and PPi were conducted, suggesting the prepared y-CDs can be used to monitor Fe 3+ and PPi variation in living cells. Overall, our developed y-CDs-based OFF-ON switch fluorescent probe has the advantages of simplicity, agility, high sensitivity and selectivity, which provides a promising platform for environmental and biology applications, and paves a new avenue for monitoring the hydrolysis process of adenosine triphosphate disodium salt (ATP) by detection of PPi in organisms.
研究领域:
分析化学
·
生物医学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）