JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Liyuan Ma,Xilang Jin,Zhao Cheng,Xiao Li,Yuchen He,Xuehao Ma,Liu Ding,Haozhe Wang,Zhifeng Deng,Weixing Chen
Porous materials for fast detection and adsorption of Hg 2+ , due to their good sensitivity and high adsorption capacity, were currently developed as one of the best ways to solve Hg 2+ pollution. Inspired by the structure of small-molecule B-1 demonstrating specific recognition towards Hg 2+ , the covalent organic polymers (COPs) material TB-COP was constructed for a better demonstration of Hg 2+ detection and adsorption. The results indicated that TB-COP could accomplish rapid detection of Hg 2+ in about 90 s, with a good linearity (R 2 = 0.9993) and high sensitivity (LOD = 36 nM). Because the electron transfer between N and S atoms in the benzothiazole moiety, the recognition of TB-COP towards Hg 2+ was achieved, which was further proved by DFT calculation. Though the COPs possess its excellent fluorescence properties, the saturated adsorption capacity for Hg 2+ by TB-COP reached 150.38 mg·g −1 at pH = 7. More importantly, TB-COP could be approximately recycled 5 times in the Hg 2+ adsorption-desorption cycle at room temperature, providing a new strategy to solve Hg 2+ pollution.
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EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Chaoji Xiong,Kejie Li,Chunzhi Peng,Xingmao Zhang,Kun Liang,Wei Wu,Qian Chen
In this study, the thiophenyl polyamide ( TPPA ) derived from tri(4-aminophenyl) benzene was synthesized for the removal of Hg 2+ from the aqueous solution. The adsorbent was characterized by the Fourier transform infrared spectroscopy, x-ray photoelectron spectroscopy, scanning electron microscopy, nitrogen adsorption–desorption, thermogravimetric analysis and differential scanning calorimetry. The adsorption capacity of Hg 2+ is 518.7 mg g −1 at a dose of 1.1 g/L of adsorbent. TPPA was shown to have the following advantages: (i) the high selectivity for the excess metal ions Hg 2+ , (ii) the stability in the pH values ranging between 2 and 6, and (iii) the proper recyclability (87 % of Hg 2+ can be removed in 5 adsorption–desorption cycles). Our analysis suggests the models of the pseudo-second-order kinetics and the Langmuir isotherm are suitable for the description of the adsorption of Hg 2+ on the thiophene network polyamide. Our experimental and theoretical results reveal the relationship between the structures and the adsorption capacities of TPPA , identifying the oxygen atom (amide) and the sulphur atom (thiophene) as the most important chemical-reaction sites.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Yingbo Zhao,Fanrui Zhou,Kun Liang,Chunhua Wu,Xiaoping Rao,Qian Chen
In this study, a novel imine bond-based covalent triazine framework (CTF) with triazine groups as its backbone, designated as SWFU-CTFs-101 CTFs, was synthesized and utilized for the adsorption of Hg 2+ in an aqueous solution. The quasi-secondary kinetic model and Langmuir model indicate that the capture of Hg 2+ by the SWFU-CTFs-101 is a chemisorption process in a monomolecular layer. The maximum adsorption capacity of the material was determined to be 148.33 mg/g at a solid-liquid ratio of 1 mg/mL, an initial concentration of Hg 2+ of 400 mg/L, a pH of 6.0 and a temperature of 25°C. The adsorption mechanism of SWFU-CTFs-101 was elucidated by integrating experimental results, spectroscopic properties (SEM and XPS, etc.), and density functional theory (DFT) calculations. Notably, the adsorption capacity of SWFU-CTFs-101 in water remained largely stable after four cycles of recycling, indicating its promising potential for future practical applications.
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ACS Omega
·
2025
·
IF 4.3
Mengfan Duan,Zhuo Wang,Weiping Zhu,Yufang Xu,Xuhong Qian
The recent discovery of heavy metal pollution in Chinese herbs has raised serious concerns for both human health and the environment. Researchers’ attention has been drawn to the toxicity and bioaccumulation of heavy metal ions. In this paper, a new technical method for preparing ethylene glycol-bis (β-aminoethyl ether)-N,N,N′,N′-tetra acetic acid (EGTA)-functionalized cotton fiber was innovatively proposed, and on this basis, heavy metal ions were successfully removed. First, the surface of cotton fiber (FC) was modified with amino group by reactive dye dyeing method to obtain FN (amino-modified cotton fiber). Subsequently, EGTA anhydride was grafted onto FN to obtain FNE (EGTA-modified cotton fiber). The interaction between materials and metal ions was systematically studied by isothermal titration calorimetry and other methods. The results showed that the adsorption capacity of FNE for Cd2+, Pb2+, and Hg2+ could reach 18.87, 25.84, and 6.69 mg/g, respectively. More importantly, FNE can be reused at least five times in an acidic environment. Furthermore, it is possible to efficiently eliminate heavy metal ions from Chinese herb extracts without compromising the active ingredients. This research provides a brand-new idea and method for solving the problem of removing heavy metal ions from Chinese herb extracts.
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Mu-Lan Yao,Si-Lu Wang,Si-Mian Liu,Xiao Wang,Ji-Jiang Wang,Xiang-Yang Hou
This study presents a novel method for simultaneous identification of Hg 2+ , In 3+ , and Zr 4+ ions in solution using a double-emission fluorescence MOFs composite (EY@MOF-1) as a probe. The new pure zinc-based metal-organic framework ({[Zn 3 (TPPO) 2 (1,4-IYI) 2 ]·3H 2 O} n , MOFs-1, Tri( p - carboxyphenyl) phosphorus oxide = H 3 TPPO,1-(4-imidazol-1-ylphenyl)-imidazole = 1,4-iyi, Eosin Y = EY) produces strong single emission fluorescence at 364 nm when excited at 320 nm. Utilizing its unique fluorescent properties, MOFs-1 can effectively identify Hg 2+ , In 3+ , and Zr 4+ ions in solution. However, the fluorescence quenching effect caused by the three ions is identical, making it impossible to accurately determine which metal is the identified ion. To address this issue, a post-modification synthesis strategy was used to construct EY doped dual-emission fluorescent material EY@MOF-1. As expected, EY@MOF-1 can effectively identify and differentiate Hg 2+ , In 3+ , and Zr 4+ ions in solution based on their different fluorescence quenching changes. The probe has a limit of detection of 0.18 μM (Zr4+), 0.20 μM (In3+), and 0.13 μM (Hg2+) within a certain concentration range. The mechanism of fluorescence recognition was investigated in depth. This double emission fluorescence probe, with its high sensitivity and selectivity, is the first of its kind and provides a simple and reliable method for effective identification of Hg 2+ , In 3+ , and Zr 4+ . It has potential applications in environmental monitoring and is a valuable tool for ion identification.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Yanzhong Li,Sijia Qi,Chengcai Xia,Yanhao Xu,Guiyun Duan,Yanqing Ge
A novel imidazo[1,2-a]pyridine-rhodamine ratiometric fluorescent probe IP-Hg for Hg 2+ based on a fluorescence resonance energy transfer mechanism has been developed. The probe has been proved to show high sensitivity and high selectivity toward Hg 2+ . Furthermore, it could be used for imaging Hg 2+ in cells and in polluted water.
研究领域:
分析化学
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环境科学
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生物医学
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 40
·期 3
·2333-2342
·
IF 3.277
Qunbo Mei,Ruqiang Tian,Yujie Shi,Qingfang Hua,Chen Chen,Bihai Tong
Different types of fluorescent probes for Hg2+ based on the 5-thiophen-2-yl-benzothiazole derivatives (TBT, 2-thiophen-2-yl-benzothiazole; CTBT, 9-(5-benzothiazol-2-yl-thiophen-2-yl)-9H-carbazole; DTBT, 2-(5-acenaphthen-5-yl-thiophen-2-yl)-benzothiazole; and NTBT, 6-(5-benzothiazol-2-yl-thiophen-2-yl)-2-hexyl-benzo[de]isoquinoline-1,3-dione) were realized by changing the subsituents. Multisignaling changes were observed through UV-vis absorption and fluorescence spectra upon addition of Hg2+. The addition of Hg2+ on TBT induced a remarkable OFF/ON-type fluorescence signaling behavior. With the introduction of electron-donating carbazole, the detection behavior of CTBT was just the reverse of what TBT displayed, while a ratiometric fluorescent probe based on DTBT for Hg2+ was prepared by introducing the weak electron-drawing group acenaphthene. Moreover, the dichloromethane solution of CTBT and DTBT showed a distinct color change from colorless to yellow with the addition of Hg2+, which indicated that these two probes would facilitate the naked-eye detection of Hg2+. However, both UV-vis absorption and fluorescence spectra of NTBT with strong electron-withdrawing substituents showed no obvious change upon addition of Hg2+. It would be concluded that the electronic properties of the molecule was one of the vital factors in designing chemosensor molecules.
研究领域:
化学传感器
·
分析化学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Sheng Chen,Wenji Wang,Mingming Yan,Qin Tu,Shu-Wei Chen,Tianbao Li,Mao-Sen Yuan,Jinyi Wang
The sensitive detection and quantification of heavy and transition metal ions are particularly important. Among them, mercury(II) (Hg 2+ ) and silver(I) (Ag + ) ions, as the most ubiquitous heavy metal ion pollutants, are difficult to discriminate in the same system because of their similar reactions and coordination abilities. Herein, we designed and synthesized a “turn-on” chemosensor, RBTP , which is an intergrant of rhodol and 2-hydroxy benzothiazole by introducing a benzothiazole unit to the ortho -position of the phenolic hydroxy of rhodol. RBTP showed a sensitive dual-channel fluorescence-enhanced response to Hg 2+ and Ag + at 595 and 520 nm with low detection limits of 0.27 and 0.45 μM, respectively. Studies of their sensing mechanism indicated that the Hg 2+ -induced orange fluorescence at 595 nm originates from an irreversible Hg 2+ -promoted oxadiazole forming reaction and the Ag + -induced green fluorescence at 520 nm originates from special molecular packing of the RBTP -Ag + complex. Furthermore, the potential of probe RBTP as practical biological imaging agents was further confirmed in HepG2 cells. Simultaneously, RBTP exhibited remarkable solid-state luminescence with an aggregation-induced emission (AIE) feature. The AIE mechanism was thoroughly explored using X-ray single-crystal structures and photophysical determinations.
研究领域:
分析化学
·
环境科学
·
生物成像
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Jia Yu Liang,Lei Han,Shi Gang Liu,Yan Jun Ju,Nian Bing Li,Hong Qun Luo
In this work, sodium salicylate and ethylenediamine (EDA) are used as the precursors to synthesize green fluorescent carbon dots (CDs). The CDs have some attractive properties, including better oxidation resistance, good water solubility, and excellent stability in high ionic strength solutions in a pH range of 6.0–10.0. Compared to other metal ions , only Hg 2+ can quench the fluorescence of CDs, and with the introduction of biothiols, the fluorescence of the CDs/Hg 2+ system can be recovered. Therefore, a turn off/on fluorescent sensor is constructed using CDs as a fluorescent probe , and the sensor is applied to the detection of Hg 2+ and biothiols (glutathione, homocysteine and cysteine). In addition, the fluorescent sensor exhibits excellent selectivity and sensitivity. The linear range of Hg 2+ is 0.05–10 μM with the detection limit of 44 nM. Glutathione, homocysteine, and cysteine have a linear response in the range of 0.5–10 μM with the limit of detection of 80, 76, and 69 nM, respectively. Furthermore, the fluorescence method is successfully used to detect Hg 2+ in actual water samples and biothiols in human plasma.
研究领域:
分析化学
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环境科学
·
生物医学
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高影响因子
JOURNAL OF FLUORESCENCE
·
2022
·Vol. 32
·期 6
·2077-2086
·
IF 2.525
Yu Bo,Yuan Ruimin,He Tianzhi,Liang Lijuan,Huang Kun
The development of mercury ion selective fluorescent probe is significant because it is one of toxic heavy metals and poses great risks and hazards to human health. Herein, we develop a mercury ion-selective fluorescent probe, namely IB , based on imidazole decorated benzothiadiazole that obtained by a facile palladium catalytic C-N coupling reaction. IB exhibits high selectivity and sensitivity towards mercury ion in water with nearly 32-fold fluorescent enhancement. The detection limit is calculated to be 0.93 nmol/L. In addition, the sensing of mercury ion can be conducted in a wide pH scope ranging from 4.0 to 10.0. Subsequently, the mercury ion elicits fluorescence of IB solution can be quenched by the addition of cyanide anions, showing “off-on-off” fluorescence transformation with at least 5 cycles, demonstrating the reversible sensing ability of IB . Furthermore, an INHIBIT logical detector has been developed using mercury ion and cyanide anions as inputs and fluorescence of IB as output. Significantly, IB can be utilized for mercury ion detection in real water sample.
研究领域:
化学
·
环境科学
·
分析化学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Liying Yu,Lingyu Zhang,Guojuan Ren,Shuang Li,Baoya Zhu,Fang Chai,Fengyu Qu,Chungang Wang,Zhongmin Su
In this article, we reported a dual emissive multicolorful fluorescent-nanoprobe which was composed of gold nanocluster (BSA-Au NCs) and carbon dots (CDs) with a certain proportion, i.e. Au NCs-CDs. The dual emissive Au NCs-CDs showed pink fluorescence under UV light, and the dual emission peaks at 625 nm and 444 nm were corresponded to the existence of Hg 2+ and Cr 6+ respectively. The fluorescence color transformed from pink to blue when in presence of Hg 2+ . The blue fluorescence emission of CDs selectively quenched by Cr 6+ , whereas the red fluorescence of BSA-Au NCs was stable against Cr 6+ , which can be treated as internal reference. The difference response of the two emissions to Hg 2+ and Cr 6+ resulted in a distinguished fluorescent color change, which can be noticed by the naked eyes clearly. When the Hg 2+ and Cr 6+ were exposed to the Au NCs-CDs simultaneously, the dual-emission of the Au NCs-CDs were all reduced and exhibited the complete quenching of the pink emission. The detection limits for Hg 2+ and Cr 6+ were 1.85 nM and 5.34 nM, respectively. Significantly, it was successfully applied to determine the existence of Hg 2+ and Cr 6+ in real samples, which offered the advantages of simplicity, environmentally friendly and cost saving efficiency.
研究领域:
分析化学
·
纳米生物技术
·
环境监测
·
毒理学
·
分子探针
·
环境健康
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高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 8
·1-11
·
IF 5.7
Zhang Ziyi,Liu Dan,Zhang Xiaoshuo,Luo Xueli,Lin Wanmei,Li Zhonghong,Huang Jihong
Novel methods for high-performance detection of Hg 2+ in seafood are critical for ensuring food safety and human health. Herein, Ag nanoparticles (Ag NPs) were successfully deposited on carbon microspheres (CMs) to form Ag NPs-CMs nanocomplex. The proposed Ag NPs-CMs could oxidize colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue oxidation state TMB (oxTMB) in the presence of hydrogen peroxide (H 2 O 2 ) and had a significant UV–vis absorption peak at 652 nm. The excellent peroxidase-like activity was attributed to the increased electrostatic attraction of CMs and the catalytic synergistic effect. After adding Hg 2+ , the catalytic activity of Ag NPs-CMs was specifically enhanced and the Michaelis–Menten constant ( K m ) decreased from 0.067 to 0.052 mmol/L due to the formation of Ag-Hg amalgam which produced more superoxide anions (O 2 •− ) and hydroxyl radicals (•OH). The linear response ranges for Hg 2+ were 2~833 nmol/L and 2.5~40 μmol/L, with the low detection limit of 1.10 nmol/L. This method was applied to detect Hg 2+ in seafood with satisfactory recoveries of 95.65~106.56%. A hydrogel kit was designed for portable detection of Hg 2+ , and the response range was 0.5~5 μmol/L. This work provides a reliable method for visual Hg 2+ detection in seafood as well as a feasible strategy for the design of high-performance nanozymes. Graphical
研究领域:
纳米技术
·
环境监测
·
食品安全
·
生物传感器
·
催化
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