JOURNAL OF HAZARDOUS MATERIALS
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2012
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IF 4.173
Zhuqing Wang,Dayu Wu,Genhua Wu,Ningning Yang,Aiguo Wu
Rhodamine hydrazide modifying Fe 3 O 4 microspheres (Fe 3 O 4 -R6G) was developed for selective detection and removal of mercury ion from water. With a saturation magnetization of 74.2 emu/g, the Fe 3 O 4 -R6G could be simply recollected from water with magnetic separation within a few minutes. The selectivity and adsorption ability of Fe 3 O 4 -R6G for metal cations were studied by fluorophotometry and atomic absorption spectrometry, respectively. The results showed that Fe 3 O 4 -R6G exhibited excellent selectivity for sensing mercury ion over other metal ions in aqueous solution, and also adsorbed 91% of mercury ion. The maximum adsorption capacity of the Fe 3 O 4 -R6G for Hg 2+ ion was 37.4 μmol g −1 . The Fe 3 O 4 -R6G was successfully applied to the determination of Hg 2+ in environmental samples, and could be used repeatedly by treatment with tetrabutylammonium hydroxide.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Xiang Long,Jing Hu,Hongxiang Liu,Shaogui Wu
Ultraviolet-emitting fluorescent carbon dots (U-CDs) were successfully synthesized via a simple one-step hydrothermal method using benzene-1,3,5-tricarboxylic acid as the carbon source and o-phenylenediamine (OPD) as the nitrogen source. The U-CDs had an average particle size of 6.53 nm and were rich in functional groups such as amino, hydroxyl, carboxyl, and carbonyl moieties. Their fluorescence excitation and emission wavelengths were observed at 325 and 365 nm, respectively, with an impressive photoluminescence quantum yield of approximately 20%. The U-CDs also exhibited excellent water solubility, salt resistance, and photobleaching resistance. By harnessing these unique properties, a bifunctional fluorescent probe was developed to detect Hg2+ concentration and temperature. The probe showed a strong linear response to Hg2+ in the range of 0–42 μmol/L and to temperature between 30 and 60 °C, demonstrating high sensitivity and a low detection limit. These characteristics make the probe ideal for analyzing real samples. This work not only expands the family of carbon dots but also introduces a simple and cost-effective method to synthesize multifunctional U-CDs, advancing their application in temperature and metal ion sensors.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
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2015
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IF 4.762
Ling Li,Chunyan Wang,Jianjian Wu,Yu Chung Tse,Yue-Peng Cai,Keith Man-Chung Wong
A new class of fluorescein/rhodamine hybrids with two spirolactone rings was reported to exhibit dual-output fluorescent behaviors independently. Isolation and characterization for two diastereomers, trans-RhOH and cis-RhOH, have been made and their X-ray crystal structures determined. In a basic environment, the spirolactone ring on the hydroxyl side will be opened to give a fluorescein-like optical output with the lowest absorptions at 485 and 530 nm emission. On the other hand, a rhodamine-like optical output, i.e., 528 nm absorption and 575 nm emission, will be switched on by a H+ or a Hg2+ ion, attributed to the spirolactone ring opening on the amino side. In a methanol−buffer system with different pH values, the corresponding pKa values for the hydroxyl and amino groups were determined as 5.7 and 2.3, respectively. Selective Hg2+-sensing properties have also been discussed, and log Ks values of about 3.60 and 3.73 were determined. Confocal microscopic images of Caenorhabditis elegans incubated with RhOH were found to show enhanced fluorescent intensity with a Hg2+ ion, demonstrating the potential application of RhOH for in vivo biological imaging.
研究领域:
化学
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生物学
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医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2017
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IF 2.084
Yiru Jia,Yi Pan,Haiying Wang,Rong Chen,Hua Wang,Xinjian Cheng
A fluorescent monomer of boron dipyrromethene (BODIPY) derivative ( 9AnPD) is designed and synthesized at first, and then it is introduced into polyurethane to obtain polymeric chemosensor with dangling fluorescent side groups. The monomer chemosensor 9AnPD exhibits highly selective properties to Hg 2+ ion in a wide pH range. The color of the monomer changed rapidly upon the addition of Hg 2+ ion. The fluorescence peak shifted and is enhanced about 4-flod. In addition, the monomer chemosensor reaches the detection limit of Hg 2+ is as low as 5 × 10 −6 m. When the fluorescent monomer is introduced to polymers, the sensing properties of the monomer chemosensor 9AnPD still remained. The polymer chemosensors not only exhibit fluorescence shift and color change for identifying Hg 2+ ion as its monomer chemosensor, but also improve the efficiency of detection. The detection limit of polymer chemosensor could reach 5 × 10 −7 m , and the fluorescence enhanced about 6-flod. The glass transition temperature (T g ) of the fluorescent PU is increased with the introduction of 9AnPD . However, it is about 60 °C, and will not lead to any adverse effect for the process. The molecular weights of PUs are lower than which without 9AnPD , but still of the macromolecular level.
研究领域:
材料科学
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分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Bao-xing Shen,Ying Qian
A novel ratiometric fluorescent probe RhB-BODIPY-OH based on Rhodamine and boron dipyrromethene (BODIPY) platform for sensing Fe 3+ and Hg 2+ ions was synthesized by Click reaction. RhB-BODIPY-OH dendron was a hybrid fluorescent probe with reaction-based as well as lock/key-based detection sites, which contains four recognition positions including Schiff base C N functionality, triazole–triazole linker and the spirocyclic ring of the Rhodamine unit. Naked eye detection was realized with the obvious color change. In addition, low detection limit was calculated from titration results with the value were 7.74 × 10 −8 M for RhB-BODIPY-OH/Hg 2+ as well as 3.91 × 10 −7 M for RhB-BODIPY-OH/Fe 3+ , separately. The probe is highly sensitive, the detection time is less than 2s. On top of that, living cell imaging experiment was carried out, which demonstrated that RhB-BODIPY-OH is a good bioimaging agent in living cells. Eventually, amino-group-functionalized silica fluorescent nanoparticles (FNPs) encapsulating the RhB-BODIPY-OH dyes were prepared and characterized by transmission electron microscopy.
研究领域:
化学
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生物医学工程
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分析化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Tao Zheng,Zhenxiang Xu,Yong Zhao,Hongqi Li,Rong Jian,Congcong Lu
A spiropyran-appended polysiloxane ( SP-Si ) was synthesized and characterized. The photochromic SP-Si has good thermal stability and exhibits high fatigue resistance to light. SP-Si acts as a dual colorimetric and spectroscopic probe for determining multi-scale pH over a wide range of 1∼14, and for detection of Ag + and Fe 3+ ions. Based on the transformation from colorless SP-Si solution without absorption at 440 nm to brown SP-Si /Ag + showing extremely strong absorption at 440 nm by addition of Ag + ions and subsequent transformation from brown to colorless SP-Si /Ag + /Hg 2+ with very weak absorption at 440 nm after addition of 1 equivalent of Hg 2+ ions, SP-Si /Ag + system serves as a dual colorimetric and spectroscopic probe for highly selective and sensitive detection of Hg 2+ ions. The detection is not interfered by common competitive metal ions such as Na + , K + , Li + , Ni 2+ , Fe 2+ , Zn 2+ , Co 2+ , Sr 2+ , Cu 2+ , Al 3+ , Ce 3+ and Cr 3+ . Applicability of SP-Si for real water sample analysis has been proved.
研究领域:
材料科学
·
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Zhen-Long Wu,Di Shi,Li Huang,Wen-Ying He,Xiang-Ying Sun,Bin Liu,Jiang-Shan Shen
A highly selective and sensitive probe 1b was successfully developed for detecting Hg 2+ ions in mixed aqueous medium with a “turn on” fluorescence mode, via a series of structural optimization of probes. These probes could be easily synthesized by one-step condensation reactions between o -phenylenediamine or 2, 3-diaminonaphthalene and o (salicylaldehyde), m , or p- hydroxybenzaldehyde. Introducing a certain amount of Hg 2+ ions the fluorescence of probes bearing one or two salicylaldehyde moieties including probes 1a, 1b, and 4 could be turned on. The fluorescent response is likely due to the well matching between Hg 2+ ions size and the geometric structure of probes, resulting in that probes bearing salicylaldehyde moiety are mostly favorable for binding with Hg 2+ ions by way of 1:1 molar ratio. These bindings likely facilitate excited state internal proton transfer (ESIPT) or ESIPT coupled aggregation-induced enhancement of emission (AIEE) process. Considering the sensitivity and the potential of practical application, probe 1b was chosen to establish a fluorescent enhancement sensing system towards Hg 2+ ions over other competing metal ions, with excellent limit of detection of 12.5 ppb.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
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