POLYMER COMPOSITES
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2016
·
IF 2.004
Qing-Yong Li,Jun Ye,Jian Xiong,Noureddine Abidi
Lanthanide metal complexes as novel luminescent metal-organic frameworks with potential application such as probes, sensors and labels, have greatly been developed. This paper presents novel nanocomposites by reacting terbium salt with the sodium carboxymethyl cellulose (NaCMC) at different pHs, Which were characterized by SEM, TEM, FTIR, XPS, WAXD, GPC, UV-Vis, and PL. The results show that Tb 3+ ions react with O of COO-, -OH, and -COC on NaCMC. The morphologies of these nanocomposites showed spheroidal-like with the size around 100 nm at around neutral pH, but show rod-like and band-like around 100 nm in width and about 500 nm in length at pH = 11 and 12. They emit bright green characteristic fluorescence of Tb 3+ under ultraviolet light due to the antenna effect when NaCMC transfer the energy efficiently to the Tb ions around neutral pHs. However, at higher pH, they show weaker fluorescence intensity in spite of strong crystalline because abundant Na + are involved in them and affected the efficiency of energy transfer between NaCMC and Tb 3+ . These nanocomposites could find potential biological applications base on their fluorescent and biodegradable properties. POLYM. COMPOS., 38:E498–E507, 2017. © 2016 Society of Plastics Engineers
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Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 22
·3903-3910
·
IF 4.872
Genxing Zhu,Ruibo Zhao,Yaling Li,Ruikang Tang
Multifunctional Gd,Ce,Tb co-doped β-tricalcium phosphate (TCP) porous nanospheres are prepared by a facile solvothermal strategy with trimethyl phosphate as the phosphorus source. The as-prepared nanomaterial (average diameter of 100 nm) has a multiple level pore size distribution with the specific surface area of 124.33 m2 g−1, which benefits drug loading. Its photoluminescent and magnetic multifunctions are realized by the co-doping of Gd3+, Ce3+ and Tb3+ ions, which make the nanomaterial promising for both fluorescence and magnetic resonance imaging techniques. Furthermore, the nanomaterial exhibits excellent cytocompatibility and a relatively high doxorubicin loading capacity as well as sustained pH-sensitive drug release behaviour. It is suggested that the Gd,Ce,Tb co-doped β-TCP porous nanospheres are promising for applications in the biomedical fields such as multifunctional drug delivery systems and tissue engineering scaffolds with bioimaging guidance.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Dong Zhang,Ping Yan,Hong Yu,Jing Sun,Shuyun Zhu,Xian-En Zhao
Development of accurate, convenient and portable methods for monitoring 4-aminophenol (4-AP) is extremely important because of its strong toxicity. Here, a ratiometric fluorescence sensor based on Ag + -enhanced luminescence of Tb-DNA complexes has been presented for the detection of 4-AP. The luminescence of Tb-DNA complexes is enhanced about 30 times by Ag + , which can trigger energy transfer from DNA to Tb 3+ more efficiently. In the presence of 4-AP, Ag + can be reduced into Ag 0 owing to its strong reducibility, inducing the decrease of Tb-DNA complexes at 545 nm remarkably. Besides, 4-AP exhibits intrinsic fluorescence at 375 nm under the same conditions. Therefore, ratiometric detection of 4-AP can be achieved using F 375 /F 545 as readout with a detection limit of 0.4 μM. Real water samples have been tsted to evaluate this method in practical application and satisfactory results have been obtained. Furthermore, the addition of 4-AP into Tb-DNA-Ag + system induces a visible color variation from green to bluish violet, enabling visual detection of 4-AP under the assistance of a smartphone.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiaxin Wang,Yifan Wang,Huixin Qiu,Huixia Zhu,Zhenyu Wang,Yue Li,Youshun Jia
We systematically study the crystal structure, magnetism and cryogenic magnetocaloric effect (MCE) in heavy rare-earth RE 6 MoO 12 ( RE = Tb, Dy, Ho, and Er) compounds. All RE 6 MoO 12 compounds belong to a cubic structure (space group: F m 3 − m ). Meanwhile, magnetic measurements illustrate that RE 6 MoO 12 compounds exhibit an antiferromagnetic (AFM) phase transition. It is proved by the slope of the basic Arrott-plots that all compounds undergo second-order magnetic phase transition (SOMT). In addition, under the applied magnetic change ΔH = 7 T, the maximum magnetic entropy change (-∆ S M max ) near Néel temperature ( T N ) is evaluated to be 12.9, 20.7, 21.1, and 21.2 J/kg K, and relative cooling power ( RCP ) is evaluated to be 308.3, 473.9, 506.2, and 381.4 J/kg for Tb 6 MoO 12 , Dy 6 MoO 12 , Ho 6 MoO 12 , and Er 6 MoO 12 , respectively. Consequently, our study underscores the magnetism and magnetocaloric effect properties exhibited by heavy rare-earth RE 6 MoO 12 compounds family, positioning them as a potential magnetic refrigerant in the field of low-temperature magnetic refrigeration.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Xinzhuang Wei,Yaming Zhao,Huifeng Zhang,Qiong Jia
With the extensive use of neonicotinoid pesticides like thiamethoxam (TMX), there is a growing need to develop sensitive and selective methods to monitor its residue levels. In this study, we developed a fluorescence sensor based on terbium/cerium metal-organic framework combined with molecularly imprinted polymer (Tb/Ce MOF@MIP) for TMX detection. Through systematic optimization of synthesis conditions and detection conditions, the sensor was successfully employed for the determination of TMX, exhibiting high selectivity, along with a linear detection range of 1–50 μM and a limit of detection of 0.8 μM. In addition, the practical applicability of the sensor was validated in real samples including apples, tea, and soil, and the accuracy was assessed through recovery experiments.
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Foods
·
2026
·Vol. 15
·期 5
·829
·
IF 6
Jinqiong Xu,Xinyu Yu,Jianbo Liu,Qinglin Sheng
Pseudomonas aeruginosais an important waterborne pathogen that is harmful to food safety and human health. Therefore, the detection ofPseudomonas aeruginosahas become an essential item in food sampling. This article constructs a fluorescent aptamer sensor based on Tb-MOFs, using Tb-MOFs as the fluorescence signal source, colloidal gold (AuNPs) as the signal conversion switch, and aptamers as the target recognition element, to establish a quantitative detection method forPseudomonas aeruginosa. The constructed sensor exhibits a good linear relationship within the concentration range ofPseudomonas aeruginosafrom 1 to 106CFU/mL, with a detection limit of 0.63 CFU/mL. Moreover, the sensor was also applied to the detection ofPseudomonas aeruginosain actual samples of bottled drinking water and orange juice. The fluorescent aptasensor based on Tb-MOFs provides a rapid and sensitive new sensing method for the detection ofPseudomonas aeruginosain food.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Hui Cao,Lin Chen,Zixia Huang,Xiner Ding,Yiyuan Liu,Jinsong Yu,Fei Xu
Lanthanide-based metal–organic frameworks (Ln-MOFs) have received wide attention as luminescent sensors due to their outstanding porosity and optical properties. However, the poor selectivity and instability of Ln-MOFs in a water environment limit their application in a complex sample matrix. To address this issue, a luminescent Tb–H4btc-Asp@IIP was developed through amino acid functionalization via a coordinative postsynthetic method (CPSM) combined with surface imprinting strategies. The synthesized Tb–H4btc-Asp@IIP retained 90.2% of its original fluorescence intensity after 30 days in aqueous environments and exhibited high thermal stability up to 286 °C. This improved stability was primarily attributed to a protective ion-imprinted polymer (IIP) layer measuring 90 nm in thickness. Additionally, Tb–H4btc-Asp@IIP exhibited excellent selectivity for Pb(II), benefiting from the dual recognition capabilities of the Asp functional groups and the imprinted cavity for Pb(II). The Tb–H4btc-Asp@IIP sensor effectively detected Pb(II) concentrations ranging from 5 to 300 ng/mL, achieving a low detection limit of 3.19 ng/mL. In vegetable samples, the sensor was able to quickly detect Pb(II) levels, with the average recovery ranging from 82.4 to 109.2% and RSD values of 2.0%–4.8%. The photoinduced electron-transfer (PET) effect and dynamic quenching process contributed to the sensing process of Tb–H4btc-Asp@IIP.
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Analytical Methods
·
2023
·Vol. 15
·期 16
·1953-1958
·
IF 3.1
Piaotong Liu,Rusi Hao,Wenliang Sun,Junhui Li
As an important trace element in the human body, the concentration of Cu2+ has an important impact on the environment and human health, and its quantitative determination is of great significance in the fields of environmental protection and food safety. Here, a ratiometric fluorescent probe based on Tb(III)-functionalized UiO-66-type MOFs has been synthesized via a facile post-synthetic modification method by employing mixed linkers containing terephthalic acid and 2,6-pyridinedicarboxylic acid for Cu2+ detection. The blue fluorescence intensity at 440 nm from the ligands of MOFs does not change much with increasing Cu2+ concentrations and can be used as a reference signal, while the green fluorescence of Tb3+ can be rapidly and selectively quenched, causing fluorescence intensity at 547 nm to decrease. The probe can be used as a ratiometric sensor for Cu2+ detection with a good linear response and low detection limit. The use of the probe for the determination of Cu2+ in real water samples and drinks shows good practicality. This method for Cu2+ detection is simple, specific and visualized to meet the needs of environmental monitoring and food analysis and provides a new strategy for the construction of new copper ion fluorescent sensors to analyze complex samples.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2023
·Vol. 37
·期 9
·e7211
·
IF 3.9
Qian Xu,Xinyuan Guo,Chuantao Hou,Zonghua Wang
Synthesis of Ln-porphyrin aerogels with abundant porosity and novel photophysical properties for luminescent sensing and photocatalysis should have significant importance. In this paper, a multifunctional Tb-porphyrin aerogel was synthesized using agarose as a building block for ratiometric fluorescent Cu(II) sensing and photocatalytic degradation of rhodamine B. Specially, Tb-porphyrin particles were introduced into agarose aerogel to give the Tb-porphyrin aerogel with porous structure. Tb-porphyrin aerogel shows an excellent sensing performance toward Cu(II) resulting from the self-referencing mechanism and the porous structure. The fluorescent response exhibits a linear range from 1 to 200 μM ( R 2 = 0.990), and the limit of detection is 50 nM (S/N = 3). Such a ratiometric fluorescent sensor shows excellent long-term stability and selectivity. Furthermore, the Tb-porphyrin aerogel was used for photocatalytic degradation of rhodamine B, exhibiting a more efficient activity compared with the Tb-porphyrin particle. This research should open up a new avenue to develop Ln-porphyrin aerogel-based material for ratiometric fluorescent sensing and photocatalysis.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Yun Xie,Da-Li Chen,Yu-Long Wei,Nan Zhang,Wen-Dong Yao,Sheng-Ping Guo
Exploration of new compounds belonging to unusual families is always attractive for the everlasting development of material science. Here, three isomorphic rare-earth sulfide borates RE 3 S 3 BO 3 (RE = Nd, Tb, Dy) have been obtained via a facile metal oxide-boron-sulfur solid-state routine. Their centrosymmetric triclinic structures feature 3 D framework built by three types of REO x S y units, viz. REOS 6 , REO 4 S 3 , and REO 3 S 6 . Their structural relationship with similar phases and lanthanide contraction rule are discussed. Their optical band gaps are measured to be 2.59–2.70 eV, and the corresponding theoretical calculations are also performed. This work enriches the rarely studied chalcogenide borate system and is conducive to discovering more inorganic materials .
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JOURNAL OF APPLIED PHYSICS
·
2022
·Vol. 132
·期 13
·
IF 2.877
Wang Yi,Yan Jun,Chen Yunlin,Cui Qiuhong
Generally, researchers focus on the great negative magnetocaloric effect (NMCE) rather than the positive magnetocaloric effect (PMCE) in Mn 3 GaC. Here, we prepared Mn 3 Ga 1−x Tb x C composites with a partial substitution of Ga by Tb. Tb doping expands the canted-ferromagnetic phase (CFM) between the anti-ferromagnetic and ferromagnetic phase in Mn 3 Ga 0.97 Tb 0.03 C. The CFM phase can be as a boundary to separate the NMCE from PMCE. It is possible to combine the NMCE and PMCE for refrigeration. Compared with NMCE in Mn 3 GaC, NMCE–PMCE combination in Mn 3 Ga 0.97 Tb 0.03 C displays a much larger operating temperature range without loss of magnetic entropy changes. Therefore, the NMCE–PMCE combination is valuable for improving the operating temperature range of magnetocaloric effect materials. It also provides a new idea for refrigeration applications.
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RSC Advances
·
2022
·Vol. 12
·期 18
·11534-11542
·
IF 4.036
Bohan Wang,Zhihao Wang,Peng Mao,Yu Wang
Conventional luminescent materials generally exhibit uni-color and transient emission under UV excitation, which makes them mediocre in the field of anti-counterfeiting. The high-level anti-counterfeiting techniques are always becoming more complicated and in need of multi-color and persistent luminescent materials. Herein, we report a series of β-NaYF4:RE3+ (RE = Sm, Tb, Dy, Pr) persistent luminescent phosphors with multi-color emitting and ultra-long persistent luminescence under the irradiation of X-rays. The effects of doping concentrations of RE3+ on the size, morphology, radioluminescence and afterglow performance of the products are investigated in detail. Hexagonal structured rod-like β-NaYF4:Tb3+ crystals show super strong X-ray response and the afterglow signal lasts for up to seven days after X-rays are turned off. Upon X-rays irradiation, some of the F− ions are expected to escape from the crystal lattice by elastic collisions, leading to the generation of Frenkel defects: the F vacancies and interstitials , which capture electrons and release them slowly to achieve different afterglow emission times. Taking advantages of the extraordinary radioluminescence performance of the β-NaYF4:RE3+ persistent luminescent phosphors, the dynamic anti-counterfeiting patterns that containing rich time-resolved information were successfully designed.
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