MOLECULES
·
2022
·Vol. 27
·期 13
·4294
·
IF 4.927
Hui Li,Fei Li,Fang Liu,Xiao Chen,Wenyuan Xu,Liang Shen,Jingkun Xu,Rui Yang,Ge Zhang
In view of that conjugated polymers (CPs) are an attractive option for constructing high-sensitive Cr2O72−sensors but suffer from lacking a general design strategy, we first proposed a rational structure design of CPs to tailor their sensing properties while validating the structure-to-performance correlation. Short side chains decorated with N and O atoms as recognition groups were instructed into fluorene to obtain monomers Fmoc-Ala-OH and Fmoc-Thr-OH. Additionally, their polymersP(Fmoc-Ala-OH)andP(Fmoc-Thr-OH)were obtained through electrochemical polymerization.P(Fmoc-Ala-OH)andP(Fmoc-Thr-OH)with high polymerization degrees have an excellent selectivity towards Cr2O72−in comparison to other cations and anions. Additionally, their limit of detection could achieve 1.98 fM and 3.72 fM, respectively. Especially, they could realize the trace detection of Cr2O72−in agricultural products (red bean, black bean, and millet). All these results indicate that short side chains decorated with N and O atoms functionalizing polyfluorene enables the ultra-trace detection of Cr2O72−. Additionally, the design strategy will spark new ideas for the construction of highly selective and sensitive Cr2O72−sensors.Keywords:Cr2O72−;design strategy;conjugated polymer;ultra-trace detection;agricultural products
研究领域:
化学传感器
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2021
·
IF 4.889
Fei Li,Xuemin Duan,Shuxin Hu,Long Zhang,Liang Shen,Fang Liu,Hui Li,Ge Zhang,Jingkun Xu
Hexavalent chromium (Cr(VI)) pollution is related to human health, and the detection of its concentration has a decisive effect on pollution treatment. In this work, we designed a Cr 2 O 7 2− sensor P(Fmoc-Osu) and applied it in farmland. In the boron trifluoride diethyl etherate solution, the monomer Fmoc-Osu was electropolymerized and obtained its conjugated polymer P(Fmoc-Osu) . The introduction of succinimide and carbonic ester group in side chain enabled it to show high selectivity to Cr 2 O 7 2− in comparison to anions and twenty amino acids. Furthermore, by taking advantage of the signal amplification effect of a conjugated polymer, P(Fmoc-Osu) could analyze Cr 2 O 7 2− in trace amounts and the limit of detection was 8.3 fM. For agricultural application, we employed it in farmland water, soil, Chinese cabbage, carrot and the results showed a satisfactory result. All these results showed that P(Fmoc-Osu) is an efficient tool to detect Cr 2 O 7 2− in practical application.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Chun Liu,Xin-Long Ni
A unique phenypyridine derivatives fluorescent probes ( G1, G2, G3 and G4) were constructed and the detection performance of Cr 2 O 7 2- anion was studied. In aqueous solution, we found that the fluorescence emission of anthracene phenypyridine derivatives can be quenched by the non-covalent interaction (NCI) of anthracene phenypyridine with Cr 2 O 7 2- , and other common anions and cations do not interfere with the quenching process. Theoretical calculation shows that the LUMO energy level of Cr 2 O 7 2- is similar to that of anthracene phenylpyridium molecules, so that after G1 and Cr 2 O 7 2- molecules combine to form an ion pair (Cr 2 O 7 2- @ G1 ), the LUMO orbital of G1 is delocalized toward Cr 2 O 7 2- , which makes the HOMO electron of the probe easily captured by Cr 2 O 7 2- when it is photo excited. Intermolecular charge transfer (CT) occurs, which is resulting in fluorescence quenching of dye molecules. The discovery of this phenomenon provides a reference for the design of water-soluble anionic fluorescent probes.
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
INORGANICA CHIMICA ACTA
·
2022
·
IF 3.118
Zong-Ying Li,Hong-Xia Zhang,Tian-Sheng He,Hong-Xin Jiang,Xiao-Wei Liu,Li-Na Zhu,Xiao-Zeng Li,De-Ming Kong
A two-dimensional (2D) water-stable Cd (II) luminescent coordination polymer ( 1 ), namely {[CdLCl 2 ]} n , was obtained through assembly of a new 2-deoxy- d -ribose derivative ligand (L) with CdCl 2 , 1 showed high stability in water. Further investigation showed that 1 can be used as luminescent probe for the organoarsenic compound Roxarsine (ROX) with high selectivity and sensitivity, high quenching constants (K SV = 2.34 × 10 4 M −1 ), low limits of detection (LOD) (0.16 μM) and good recyclability in aqueous media. In addition, this luminescent probe can detect some inorganic harmful ions (Fe 3+ , Cr 2 O 7 2− and CrO 4 2− ) with excellent versatility. The detection mechanism was proved that the quenching was caused by competitive absorption and resonance energy transfer effect between 1 and analytes. More strikingly, a simple 1 -based test strip was developed owing to the quick response and recyclability of 1 , which shows visible quenching signals under UV light even when analytes concentrations are as low as 5 μM. This work has provided an effective method for the design of multifunctional CP luminescent sensors for pollutants detections in aqueous media.
研究领域:
化学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 48
·22915-22923
·
IF 3.591
Jing Li,Lin-Hui Wu,Shu-Li Yao,Hui Xu,Teng-Fei Zheng,Sui-Jun Liu,Jing-Lin Chen,He-Rui Wen
A novel Zn2+-based metal–organic framework (MOF) with the formula {[Zn(μ2-η1:η1-BBIP)(μ2-η1:η1:η1-OBA)]·3H2O}n, denoted as JXUST-7, has been successfully assembled using semi-rigid N-donor 3,5-bis(benzimidazol-1-yl)pyridine (BBIP) and flexible 4,4′-oxybisbenzoate (H2OBA). The adjacent Zn2+ ions are linked through an OBA2− ligand with a μ2-η1:η1:η1 bridging mode to form an infinite one-dimensional (1D) Zn2+–OBA2− chain. The neighbouring 1D chains are further connected by a BBIP ligand with a μ2-η1:η1 bridging mode to gain a two-dimensional (2D) sheet layer structure. Topological analysis indicates that the whole 2D structure of JXUST-7 could be simplified as a uninodal sql topology with a point symbol of {44·62}. Furthermore, the opposite parallel 2D layers are further packed by a face-to-face π–π interaction to generate a three-dimensional supramolecular structure. Luminescence experiments reveal that JXUST-7 could be considered as a multi-responsive MOF-based fluorescent probe toward Fe3+, Cr2O72− and acetylacetone (acac) via the fluorescence quenching (turn-off) effect. The detection limits for Fe3+, Cr2O72− and acac are 0.14, 1.33 and 6.53 ppm, respectively. The fluorescence quenching mechanism was analyzed in detail by powder X-ray diffraction, fluorescence lifetime measurement, X-ray photoelectron spectra, theoretical calculation and UV-Vis absorption spectra. More importantly, JXUST-7 could be cyclically utilized at least five times for detecting Fe3+, Cr2O72− and acac.
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
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Wudong Liu,Jie Zhang,Xiangbiao Yin,Xinyi He,Xinpeng Wang,Yuezhou Wei
Through a simple hydrothermal reaction , LEuH-Cl (where LEuH and Cl denote layered europium hydroxide and a chlorine ion, respectively) was synthesized. Its structure and properties were similar to those of layered double hydroxides (LDHs). The material was composed of europium hydroxide host layers with a positive charge and a guest interlayer with chlorine ions. The hydrotalcite-like structure gives it excellent anion exchange abilities, and the host shows an intense photoluminescence (PL), mainly through 5 D 0 → 7 F J (J = 0,1,2,3, and 4). MnO 4 − or Cr 2 O 7 2− can be directly adsorbed by LEuH-Cl in an aqueous solution due to the large number of exchangeable chlorine ions, thereby resulting in a static quenching effect (SQE) and forming an inner filter effect (IFE) system, which leads to the direct quenching of the PL intensity. Based on this characteristic, the concentration of these two substances in an aqueous solution can be detected quickly and simply. Based on the experimental results, LEuH-Cl exhibited high selectivity and sensitivity toward MnO 4 − and Cr 2 O 7 2− in an aqueous solution. The detection limits of MnO 4 − and Cr 2 O 7 2− were calculated to be 3.43 and 1.19 μM, respectively. This proved the feasibility of using the material for the direct detection of multiple substances. The quenching caused by the anion exchange of layered rare-earth hydroxides (LRHs) was further explored.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 30
·10584-10593
·
IF 4
Xue Wen,Wenjun Zhang,Cong Ding,Zhongfa Li,Chengyue Xin
Metal–organic frameworks (MOFs) are a unique class of multifunctional hybrid crystals that have been successfully utilized in diverse ranges of applications. However, since MOFs are prone to aqueous degradation, the development of stable luminescent MOF platforms in aqueous media is still a huge challenge. Here, a novel dual-ligand Eu3+/DUT-52-COOH composite is prepared based on the luminescent DUT-52 prototype structure via a dual-ligand strategy and a post-synthetic modification (PSM) method. The functionalized Eu3+/DUT-52-COOH material exhibits dual emission and good photothermal stability in aqueous media. Thus, Eu3+/DUT-52-COOH is developed as a ratiometric luminescent sensor to achieve highly selective and sensitive detection of Cu2+ and Cr2O72− in aqueous solutions and has a low detection limit of 3.43 μM and 25.7 nM, respectively. This work is one of the few cases of detecting Cu2+ and Cr2O72− in aqueous media based on a DUT-52, and the detection signals can be observed by the bare eye without using sophisticated analytical instruments. The possible sensing mechanism is discussed in detail. The results obtained in this project may provide broad prospects for developing smart sensing systems to accomplish highly efficient, easily operable and quantitative intelligent recognition of Cu2+ and Cr2O72−.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 4
·1446-1454
·
IF 3.069
Jin Xiao Li,Qing Lin Guan,Yu Wang,Zi Xin You,Yong Heng Xing,Feng Ying Bai,Li Xian Sun
A facile strategy was used to construct a series of composite materials with color-tunable and white light emission by encapsulating 1,3,6,8-tetrakis(p-benzoic acid)pyrene (H4TBAPy) into framework material [Eu(MCTCA)1.5(H2O)2]·1.75H2O (Eu-MCTCA), which is synthesized based on Eu(NO3)3·6H2O and 5-methyl-1-(4-carboxylphenyl)-1H-1,2,3-triazole-4-carboxylic acid (H2MCTCA). A slight adjustment of the emission color can be easily fulfilled by simply altering the concentration of H4TBAPy or regulating the excitation wavelength. Notably, white light emitting Eu-MCTCA@H4TBAPy can be realized by encapsulating H4TBAPy with a concentration of 0.75 mM, when the excitation wavelength is 350 nm. Furthermore, based on the favorable luminescence and stable structure of Eu-MCTCA@H4TBAPy in water or organic solvents, Eu-MCTCA@H4TBAPy can be used as a potential luminescent probe for detecting Fe3+, Cr2O72− and colchicine.
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
CRYSTENGCOMM
·
2021
·Vol. 24
·期 7
·1358-1367
·
IF 3.545
Yin-Xia Sun,Geng Guo,Wen-Min Ding,Wen-Yu Han,Juan Li,Zhe-Peng Deng
Heavy metal ions are common pollutants in water pollution. Amino acids, as important substances in organisms, participate in many life activities. The detection of heavy metal ions and amino acids with high selectivity and sensitivity is important. Therefore, based on H3L (H3L = 4,4′,4′′-triazine-2,4,6-tribenzoic acid) and Eu3+, an Eu-MOF was designed, synthesized and characterized. Single crystal structure analysis showed that the Eu-MOF was crystallized in the orthorhombic space group Fddd, and presents a three-dimensional (3D) porous network structure. The luminescence results show that the Eu-MOF has good luminescence stability. As a multifunctional luminescent sensor, the Eu-MOF can detect Fe3+, Cr2O72−, CrO42− and aspartic acid (Asp) in water systems with high sensitivity and selectivity, and the lowest detection limit (LOD) was 1.12 × 10−6 mol L−1, 1.95 × 10−6 mol L−1, 1.89 × 10−6 mol L−1 and 2.20 × 10−6 mol L−1, respectively. These results indicated that the Eu-MOF has potential application prospects in the detection of Fe3+, Cr2O72−, CrO42− and Asp in water.
研究领域:
化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2018
·
IF 1.703
Yu Wu,Yun Huang,Yulan Wang,Xiang Zou,Jun Wang,Weiping Wu
Developing a fast and sensitive method for the detection of 2,4,6-trinitrophenol (TNP) or Cr2O72– in aqueous solution has received great attention. In this work, a regenerable fluorescent coordination polymer [Zn(L)(H2L)]n (1) has been successfully constructed using a novel Schiff base ligand N'-[(E)-(3,5-dibromo-2-hydroxyphenyl)methylene]isonicotinohydrazide(H2L) and exploited as a dual detection probe for the selective sensing of Cr2O72– and TNP in water media. Competitive fluorometric experiments involving mixtures of anions or nitro compounds demonstrated 1 as an efficient and selective sensor for both Cr2O72– and TNP. The limits of detection for Cr2O72– and 2,4,6-trinitrophenol in aqueous solutions were found to be 11.4 and 1.19 μM, respectively. Moreover, 1 can detect TNP and Cr2O72– in real water samples. All these features clearly demonstrate its great potential of practical TNP and Cr2O72– detection in water media for public safety and security.
研究领域:
材料科学
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环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Hong-Mei Chai,Jia-Ling Yan,Gang-Qiang Zhang,Jia-Xing Wang,Yi-Xia Ren,Lou-Jun Gao
When a multicarboxylate aromatic ligand, 3,5-di(2′,4′-dicarboxylphenyl)benzoic acid (H5L), was employed, five structurally similar lanthanide metal–organic frameworks (Ln-MOFs), {[Pr10L6(OH)3Cl(H2O)6]·4C2H8N}n (1), {[Nd10L6(OH)4 (H2O)9]·4C2H8N}n (2), {[Gd10L6(OH)4(H2O)3]·4C2H8N}n (3), {[Ho10L6(OH)4 (H2O)3]·4C2H8N}n (4) and {[Er10L6(OH)4(H2O)6]·4C2H8N}n (5), were synthesized and characterized. Single-crystal X-ray structural analyses disclosed that all five Ln-MOFs crystallize in the trigonal R3 space group. They have three-dimensional mesoporous structure featuring the coexistence of binuclear and tetranuclear species as inorganic building units. The mesoporous structure of 3 was verified by the gas adsorption experiment of N2. Fluorescence analysis showed that 3 can selectively detect Fe3+, Cr2O72–, and H2O2; furthermore, it can be used for the electrochemical detection of trinitrophenol. With the merit of an excellent highly sensitive detection performance, 3 has unpredictable application prospects in future research fields.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yan Fan,Xueqin Sun,Wenyuan Zhang,Jiacheng Liu
A novel fluorescent sensor material of Eu 3+ @ Citric acid-functionalized UiO-66 (denoted as Eu 3+ @UiO-66-CA) was prepared successfully via a two-step post synthetic modification towards UiO-66. The as-obtained Eu 3+ @UiO-66-CA presented the characteristic emission of Eu 3+ ions (λ ex = 270 nm), which could be used for rapidly detecting Fe 3+ and Cr 2 O 7 2- ions by luminescence quenching in aqueous solution. The detection process for Fe 3+ ion (detection limit, 18.1 μ M) and Cr 2 O 7 2- ion (detection limit, 8.5 μ M) exhibited the high selectivity and excellent anti-interference ability. Systematic investigations were employed to make clear the mechanism of fluorescence quenching after adding Fe 3+ and Cr 2 O 7 2- ions. Moreover, the Eu 3+ @UiO-66-CA was also used for the determination of Fe 3+ and Cr 2 O 7 2- ions in the Yellow River and tap water.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）