RSC Advances
·
2016
·Vol. 6
·期 44
·37385-37390
·
IF 3.289
Zhichao Zeng,Jia Wen,Hui Yan,Zonglun Liu,Yongqian Xu,Hongjuan Li,Chongmin Zhong,Fengyu Liu,Shiguo Sun
In this work, we report the development of easy-prepared, low cost and portable photoluminescent films for pH and amine vapors detection based on Eu(III)-complex functionalized materials: Eu(DBM)3Phen (LMOF-1), Eu(DBM)3BPY (LMOF-2), which were loaded on portable matrices (e.g. neutral silica plate and normal filter paper). The films not only displayed response over a pH range of 4–13 but also can be employed to sense volatile amines or acids vapors like ammonia, ethylenediamine, acetic acid and hydrochloric acid etc., which is significant for portable pH or acid–base vapors detection.
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2024
·Vol. 225
·期 18
·2300440
·
IF 2.5
Fang Ye,Jun Ye,Jian Xiong,Qiang Li
Fluorescent hydrogel as an advanced material has been used for anti-counterfeiting, probe detection, and optical devices. A facile strategy to prepare fluorescent hydrogel is developed by carboxymethyl cellulose (CMC) with Europium(III) and polyvinyl alcohol (PVA). The hydrogel forms a physical cross-linking network under mild reaction conditions without using volatile organic chemicals. The addition of CMC-Eu(III) improves the mechanical properties of the hydrogel. At 15% CMC-Eu(III), the hydrogel reaches its maximum tensile and compressive stress, which are 47.25 ± 10.35 and 10.14 ± 1.90 kPa, respectively. Meanwhile, the hydrogels exhibit a 5 D 0 → 7 F 2 characteristic emission peak assigned to Eu 3+ , which emits stable red fluorescence under 254 nm ultraviolet (UV) light. When this hydrogel is applied to paper, the paper showed hidden fluorescent dots under UV light. This additive also enhances the mechanical properties of the paper, which reveals the multifunctionality of this fluorescent hydrogel for anti-counterfeiting and reinforcement.
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OPTICAL MATERIALS
·
2017
·
IF 2.238
Guihua Cui,Dehai Zhao,Peng Lv,Zhengguo Gao,Shuiying Chen,Nannan Qiu,Toshifumi Satoh,Toyoji Kakuchi,Qian Duan
A series of novel fluorescent complexes was formed by chelation of the thermosensitive polymers with europium(III) ions. The polymers was synthesized via atom transfer radical polymerization (ATRP), which composed of poly( N -isopropyl acrylamide) (PNIPAM) and 2-amino-2-deoxy- d -glucopyranose( d -glucosamine, GA). The aqueous solutions of the polymers and its Eu(III) complexes exhibited a lower critical solution temperatures (LCSTs), and which were approximately equal to body temperature. The maximum emission intensity of the complexes at 613 nm was enhanced by a factor of approximately 10 relative to that of the corresponding Eu(III) chloride. Cell viability assays suggested that these thermosensitive polymers and Eu(III) complexes showed excellent biocompatibility in vitro.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 16
·6435-6443
·
IF 8.067
Xu Sang,Qingru Wang,Xiaoli Gao,Adnan Khan,Ziyu Chen,Jiaxin Yang,Ming Feng,Lisa Liu,Feng Song,Wei Huang
Based on the interaction between Eu(III) complexes and liquid crystals (LCs), three general approaches by using energy transfer, electric field controllable orientation of LCs and the multi-wavelength excitation are presented to obtain a tunable emitting color for rare earth (RE)/LC composites. The Eu(tta)3phen/E7 composites were prepared via a simple guest–host method. The interaction between the RE complexes and LCs is analyzed for the emitting color change of the composites. The E7 host not only facilitates the ultraviolet photon harvesting and subsequent energy transfer to Eu(tta)3phen, but also serves the regulation of the distortion of the symmetry around the Eu3+ ions. Experimental and Judd–Ofelt theoretic analysis of the Eu(tta)3phen/E7 composites indicates the improvement of the luminescence for Eu(tta)3phen in the anisotropic LC host. This modulation of emitting color for RE/LC composites may open the door to broaden the applications of RE ion doped materials.
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Ying Dai,Yan Li,Wenmei Hu,Qinqin Tao,Zhirong Liu
Lanthanides/actinides separation is of importance in many modern industrial engineering fields, e.g. the circulation of the nuclear fuel and rare earth. N,N-dioctyl diglycol amic acid (briefly as DODGA) is known as an effective extractant for extraction of rare earth metal. In this work, two extractants, [N 1888 ][DODGA] and [N 4444 ][DODGA], were developed by using quaternary ammonium as cations and DODGA as anion. The resultant ionic liquids were used to separate europium from europium-uranium binary component system. The influence of several factors (nitric acid concentration, contact time, temperature, metal ions, extractant concentration, salting agent concentration and stripping) were analyzed. The coordination chemistry of Eu(III) with [N 1888 ][DODGA] and [N 4444 ][DODGA] were investigated by the mole-ratio method. The experimental results confirmed that the separation factors ( SF ) of Eu(III)/U(VI) were reached 55.44 and 60.35 for [N 1888 ][DODGA] and [N 4444 ][DODGA]. The stoichiometry of the complex of Eu(III) and [N 1888 ][DODGA] or [N 4444 ][DODGA] were determined as 1:3. Excellent extraction of the target metals and prominent separation factors using these ionic liquids showed that they were viable to separate lanthanides from actinides.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2019
·Vol. 321
·期 2
·733-745
·
IF 1.186
Hu Peizhuo,Nan Yu,Tai Wenya,Shan Qiang,Zhong Yi,Lei Zhiwei,Liu Tonghuan,Chen Suwen,Qian Lijuan
Modification of silica gel by butanedioic anhydride (SiO 2 –BDAH) results in efficient adsorbents for removal of U(VI), Th(IV), and Eu(III) from aqueous solutions. SiO 2 –BDAH was characterized by Fourier Transform infrared spectroscopy, elemental analysis, N 2 adsorption–desorption isotherms, thermogravimetic analysis, and potentiometric titration. The effect of contact time, pH, and initial concentration of radioactive solutions and temperature on the adsorption capacity of the sorbent was investigated. The sorption equilibrium times of U(VI), Th(IV), and Eu(III) onto SiO 2 –BDAH were 1.5, 2, and about 10 h. The sorption percentages of U(VI), Th(IV), and Eu(III) increased with increased pH from 1 to 5. The sorption process of U(VI), Th(IV), and Eu(III) can be described by the Langmuir model, with sorption capacities of 5.10 × 10 −5 , 5.06 × 10 −5 , and 3.44 × 10 −5 mol/L, respectively. The enthalpy and entropy changes were all positive, whereas the free energy changes were negative. This study indicated that SiO 2 –BDAH can remove U(VI) and Th(IV) at the same time in the presence of multiple ions from waste water quickly.
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INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Xinrui Zhang,Xianghe Kong,Liyong Yuan,Zhifang Chai,Weiqun Shi
Tetradentate 1,10-phenanthroline-2,9-dicarboxamide (PDAM) derivatives have been well documented as effective binding ligands toward MA(III) and Ln(III), while the structural analysis and species determination of the complexes are still limited. Herein, we report a combined study on the coordination of Eu(III) with PDAM derivatives using electrospray ionization mass spectrometry (ESI-MS), time-resolved laser-induced fluorescence (TRLIF), and density functional theory (DFT) calculations. PDAM derivatives here involve N,N′-diethyl-N,N′-diethyl-2,9-diamide-1,10-phenanthroline (Et-Et-DAPhen), N,N′-dibutyl-N,N′-dibutyl-2,9-diamide-1,10-phenanthroline (But-But-DAPhen), and N,N′-dihexyl-N,N′-dihexyl-2,9-diamide-1,10-phenanthroline (Hex-Hex-DAPhen). The collision-induced dissociation (CID) test shows that these alkyl-DAPhen ligands coordinate strongly with Eu(III), given that the coordination moieties remain intact during CID. The 1/2 EuIII–L species was found to be the dominant component for all three ligands, as evidenced by ESI-MS and fluorescence titration. The fluorescence decay results indicate that the hydration numbers of Eu(III) are reduced from 9 to 1 upon complexation, in agreement with the fact that the 1/2 EuIII–L species are formed, and eight water molecules are exactly replaced by eight donor atoms of two alkyl-DAPhen ligands. In addition, the DFT calculations suggest that the 1:2 EuIII–L species is more stable than the 1/1 EuIII–L species and the Eu–oxygen/nitrogen (Eu–O/N) bonds have a dominant ionic character, with the O atoms having stronger electron-donating abilities toward Eu(III) in comparison to the N atoms.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yonghao Wang,Biao Chi,Chengliang Xiao,Dagui Chen,Yongjing Wang,Minghua Liu
In this work, a layered nanocomposite with a superior adsorption ability has been designed and prepared for the preconcentration of Eu(III), a chemical analogue of trivalent lanthanides [Ln(III)] and actinides [An(III)] in nuclear waste. This nanocomposite was obtained by fabricating magnesium silicate (MgSi) of the Talc-phase Mg 3 Si 4 O 9 (OH) 10 on graphene oxide (GO) nanosheets, in which the GO matrix can effectively avoid the agglomeration of MgSi. A hierarchical structure of GO@MgSi with interwoven nano-sized MgSi lamellae dispersedly standing on the surface of GO was observed by scanning electron microscope (SEM) and transmission electron microscopy (TEM). Such a hierarchical structure effectively increases the surface area of MgSi, leading to up to date the highest adsorption capacity (344.82 mg·L −1 ) for enriching Eu(III). Powder X-ray diffraction pattern (PXRD) of Mg 3 Si 4 O 9 (OH) 10 shows that the (0 2 0) and (2 0 0) diffraction peaks disappear after the adsorption of Eu(III), indicating structural changes in MgSi lamellae after adsorption. The infrared absorption spectra (IR) and X-ray photoelectron spectroscopy (XPS) measurements confirm the structural transformations in the Si O tetrahedral and Mg OH octahedral sheet in MgSi, suggesting that MgSi lamella rather than GO sheet might play a dominant role during the adsorption process. The superior adsorption behaviors of GO@MgSi indicate that it is a highly promising and efficient candidate for Eu(III) preconcentration in aqueous solution.
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LANGMUIR
·
2025
·
IF 3.9
Rui Cao,Xinxin Li,Zhihang He,Hanxiao Tang,Xiao-Ke Zheng,Zhijuan Zhang
The development of probes for the efficient detection of volatile organic compounds is crucial for both human health protection and environmental monitoring. In this study, we successfully synthesized a ratiometric fluorescent sensing material [Eu-UiO-67 (1:1)], featuring dual-emission fluorescence peaks via a one-pot method. This material demonstrated exceptional ratiometric fluorescence recognition properties for liquid styrene and isoprene, achieving low limit of detections (LODs) of 6.2 and 20.24 ppb, respectively. Furthermore, we leveraged its outstanding photoluminescence properties to fabricate a Eu-UiO-67 film, which exhibited distinctive fluorescence responses toward gaseous styrene and isoprene. This unique behavior resulted in LODs of 12.42 ppb for gaseous styrene and 15.39 ppb for gaseous isoprene. The investigation into the sensing mechanisms revealed that the fluorescence response for styrene was mediated by an internal filtration effect, which arose from the competitive energy absorption between styrene and the Eu-UiO-67 (1:1) material. In contrast, fluorescence resonance energy transfer occurred between isoprene and the Eu-UiO-67 (1:1) materials. This approach offers a sensitive and reliable method for the detection of liquid/gaseous styrene and isoprene.
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PubMed
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Bo Li,Rui Shi,Zhongzhi Wang,Xin Qiao,Leijun Shen,Liqun Shi
Rare earth luminescent complexes encounter defects such as poor thermal stability, poor dispersibility, and easy quenching of fluorescence emission by water in practical applications. To improve these defects, we innovatively propose using polyhedral oligomeric silsesquioxane (POSS) to enhance the performance of rare earth complexes. We designed and prepared POSS-MAA-EuL composite materials. POSS is modified with long chains containing -COOH functional groups, allowing it to bind with rare earth complexes through coordination interactions. Experimental results have shown that the combination of POSS not only improves the dispersibility of rare earth complexes, but also enhances their thermal stability. It is worth noting that the binding of POSS endows rare earth complexes with the ability of resisting fluorescence emission quenching by water. When the same volume of deionized water is added (2000 μL), the fluorescence of rare earth complex is almost completely quenched, with a quenching efficiency of 99.0 %, while the quenching efficiency of POSS-MAA-EuL is only 39.2 %. There are few reports on improving the water quenching resistance of rare earth luminescent complexes by combining with POSS. Therefore, this work provides a new way to improve the performance of rare earth complexes.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 19
·7633-7640
·
IF 8.067
Haifeng Sha,Bing Yan
As the basic units of proteins, the importance of amino acids in organisms is self-evident and therefore detection of the concentration of amino acids is significant in monitoring human health. Herein, a dual-responsive Eu3+-functionalized metal–organic framework (MOFs) luminescent film (1@SA) was designed and prepared, which not only realizes the simultaneous detection of aspartic acid (Asp) and arginine (Arg) but also has the possibility of being applied in anti-counterfeiting. A portable film sensor is obtained through the cross-linking and solidification of Eu3+ ions and sodium alginate (SA) hydrogel containing uniformly dispersed MOFs. The MOF used in this work is a zinc metal–organic framework (ZnMOF) comprising uncoordinated carboxyl groups that can provide binding sites for Eu3+ ions. Moreover, it is found that the sensor shows unique fluorescence changes under the stimulation of an acidic environment. Therefore, the quantitative detection of Asp and Arg by 1@SA can be achieved, and optical anti-counterfeiting platforms are also designed according to the diversity of fluorescence changes. The new strategy proposed in this work may broaden the scope of lanthanide fluorescence films used in optical fields.
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Lijia Dong,Shengbo Li,Yefei Jin,Baowei Hu,Guodong Sheng
In this paper, CaAl hydrotalcite or hydroxyapatite decorated invasive plant ( Solidago canadensis )-derived biochar were synthesized by co-precipitation and high temperature pyrolysis method. The three composites and bare biochar were characterized by Scanning electron microscopy (SEM), X-ray spectroscopy (EDX), the Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), and X-ray photoelectron spectroscopy (XPS) techniques, and employed to remove Eu(III) from wastewater under a series of environmental conditions. The results indicated that the Eu(III) adsorption on BC@LDH@HAP was higher than that on BC, BC@LDH, and BC@HAP, and belonged to multi-layer adsorption, which was different from the monolayer adsorption of biochar. The adsorption could be fitted best by Langmuir model and the maximum adsorption capacity of Eu(III) on BC@LDH@HAP was up to 714 mg/g at pH ~ 6. The characterization results suggested that this excellent adsorption of BC@LDH@HAP arose from the abundant P-, C-, O-containing functional groups rather than larger specific surface area. The spectra of XPS, FT-IR, and XRD uncovered that the adsorption mechanisms of Eu(III) on BC@LDH@HAP involved surface complexation, ion exchange, and precipitation. Moreover, the absorbed Eu(III) was formed into two precipitate induced by P-containing groups and carbonate groups. This research confirmed BC@LDH@HAP is a promising material for the removal of Eu(III) in wastewater.
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