Journal of Materials Chemistry C
·
2024
·
IF 5.7
Jiaxuan Pan,Jiazhen Lu,Yichen Shang,Ying Li,Bing Yan
Dopamine and arginine are both important substances in the body and are closely related to human health. Timely detection of their concentration abnormalities is of great significance to the prevention of disease. In this work, a Tb3+-functionalized Eu-MOF hybridized double network hydrogel film (Tb@Eu-MOF@PVA/SA) was prepared by a simple synthesis, which can accurately detect arginine (Arg) and dopamine hydrochloride (DH). Meanwhile, the hydrogel acquired good mechanical properties through crosslinking of Tb3+and freeze–thaw cycles. The free carboxyl groups on the surface of the Eu-MOF in this hydrogel film can bind to Tb3+ and sensitize it to emit light through the “antenna effect”, thus forming a fluorescent hydrogel film with dual emission centers. By testing two kinds of detectors and controlling different excitation wavelengths, we can realize the encryption and decryption of information and build an anti-counterfeiting platform to improve the level of information security. The present work not only provides a case study for the preparation of dual-emission Tb3+-functionalized Eu-MOF hybridized dual-network hydrogel films, but also provides ideas for the development of multifunctional luminescent materials.
研究领域:
材料科学
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生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Jia Sun,Aili Feng,Xia Wu,Xiaowen Che,Weizhi Zhou
A composite fluorescent nanoprobe based on metal enhanced fluorescence (MEF) effect of gelatin-coated silver nanoparticles ( [email protected] ) was developed for selective and sensitive detection of dopamine (DA). The characteristic fluorescence of Tb(III) was using as the detection signal and [email protected] served as substrates of the MEF. Gelatin with rich amine and carboxylic groups was used not only as a co-ligand of Tb(III) complex, but also as a bridging substance and a spacing material for improving the MEF of [email protected] on the intrinsic luminescent intensity of Tb(III). Under the optimal conditions, the increment of the fluorescence intensity (measured at 307/544 nm as excitation/emission wavelength) of the system increased linearly with the concentration of DA in the range of 0.80–100 nM ( R 2 = 0.9937) and 100–1000 nM ( R 2 = 0.9978). The fluorescent probe greatly improved Tb(III) luminescence, which paved the way for sensitive detection with a low detection limit of 0.54 nM. It also showed good selectivity among other neurotransmitters . This work was successfully applied to the determination of DA in human serum samples with recoveries ranging from 99.8 to 102.2%. We believe that the Tb(III) [email protected] composite fluorescent probe can be developed as a new approach for DA detection.
研究领域:
分析化学
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纳米技术
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yong Xu,Yue Wang,Ping Wang,Yishun Wang,Weili Dai,Jianping Zou,Xubiao Luo
Employing electric energy to convert carbon dioxide (CO 2 ) into valuable small molecules is a potentially practical method in energy storage and greenhouse gas alleviation. A huge challenge for electrocatalytic CO 2 reduction is to reduce overpotential to improve energy efficiency. Herein, we demonstrate that doping alloy Pd 49 Ag 30 Te 4 (PAT) with rare-earth element Tb is beneficial for selective exposure of (1 1 1) crystal plane, which is a highly active crystal plane for producing carbon monoxide (CO). The as-prepared Tb 2.9 PAT exhibited high electrocatalytic performance with 95.7 % CO faradic efficiency at − 0.8 V (vs RHE), far exceeding that of PAT, and coupled with good durability. In situ spectral study and theoretical calculations disclose that the introduction of Tb regulates the d-band center of PAT alloy, weakens the Pd − C bonding ability, and promotes the desorption of *CO in the rate-determining step. This study provides a method for doping induced selective exposure of crystal face, which provides new idea for improving catalytic performance.
研究领域:
材料科学
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电化学
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催化
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yin-Xia Sun,Bo-Tao Ji,Jiang-Hai Chen,Lu-Lu Gao,Yu Sun,Zhe-Peng Deng,Biao Zhao,Jin-Guo Li
Diquat (DQ) is a typical bipyridine herbicide widely used to control weeds in fields and orchards. The severe toxicity of diquat poses a serious threat to the environment and human health. Metal-organic frameworks (MOFs) have received widespread attention due to their unique physical and chemical properties and applications in the detection of toxic and harmful substances. In this work, a two-dimensional (2D) Tb(III) functionalized MOF Tb(III)@ 1 ( 1 = [Cd(HTATB)(bimb)] n ·H 2 O (Cd-MOF), H 3 TATB = 4,4′,4″-triazine-2,4,6-tribenzoicacid, bimb = 1,4-bis((1H-imidazol-1-yl)methyl)benzene) has been prepared and characterized. Tb(III)@ 1 has excellent optical properties and high water and chemical stability. After the Tb(III) is fixed by the uncoordinated -COO- in the 1 framework, Tb(III)@ 1 emits the typical green fluorescence of the lanthanide ion Tb(III) through the “antenna effect”. It is worth noting that Tb(III)@ 1 can be used as a dual emission fluorescence chemical sensor for the ratio fluorescence detection of pesticide DQ, exhibiting a relatively low detection limit of 0.06 nM and a wide detection range of 0–50 nM. After the addition of DQ, a rapid color change of Tb(III)@ 1 fluorescence from green to blue was observed due to the combined effects of IFE, FRET and dynamic quenching. Therefore, a simple test paper box has been designed for direct on-site determination of pesticide DQ. In addition, the developed sensor has been successfully applied to the detection of DQ in real samples (fruits a Yin-Xia Sun and Bo-Tao Ji contributed equally to this work and should be considered co-first authors.nd vegetables) with satisfactory results. The results indicate that the probe developed in this study has broad application prospects in both real sample detection and actual on-site testing.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2021
·Vol. 36
·期 8
·1901-1909
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IF 2.464
Yan-hong Liu,Xiao-guang Ma,Li-ye Zhu,Meng Li,Xiao-xia Ren,Man Zhang
The SiO 2 @SiO 2 :Tb(1,2-BDC) 3 phen microspheres with monodispersed core-shell structure, are kind of fluorescent particles, which are prepared by a seeded growth method under the catalysis of glacial acetic acid (1,2-BDC, 1,2-benzenedicarboxylic acid; phen, 1,10-phenanthroline). Firstly, silica seed was fabricated by the hydrolysis of ethyl orthosilicate, and the Tb(1,2-BDC) 3 phen was prepared by using 1,2-BDC and phen. Then, a thin mesoporous silica shell doped with Tb(1,2-BDC) 3 phen was grown on the prepared monodisperse silica colloids. The prepared phosphor was analyzed by Fourier-transform infrared spectroscopy, X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, thermogravimetric and fluorescence spectroscopy. The experimental results showed that the diameter of the SiO 2 @SiO 2 :Tb((1,2-BDC) 3 phen microsphere was about 200 nm with a typical core-shell structure, among which the diameter of the silica core was 180 nm, and that of the mesoporous silicon shell doped with terbium complex was about 10 nm. The fluorescence intensity of SiO 2 @SiO 2 :Tb((1,2-BDC) 3 phen microsphere is nearly three times higher than that of Tb((1,2-BDC) 3 phen complexes. The prepared microspheres could be widely used in bio-imaging, optoelectronic appliances and medical diagnosis.
研究领域:
材料科学
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光学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yujie Chen,Zhaode Mu,Jianli Zuo,Min Qing,Jing Zhou,Lijuan Bai
A novel aptasensor for the detection of kanamycin (KNM) was developed based on dual signal amplification through nanomaterials and DNA rolling machines. Firstly, a composite consisting of the covalent organic framework (COF), ketjen black (KB) and toluidine blue (Tb), was synthesized for signal generation. Tb molecules were loaded into the composite and combined with AuNPs to serve as tracer label. Secondly, the wDNA-loaded Fe 3 O 4 magnetic beads (wDNA@MBs) as the DNA walking legs, with cleavage by Mg 2+ -driven DNAzyme, the DNA walking legs can move along the sDNA-decorated MBs surface, converting the target KNM into numerous output DNA strand, achieving sensitive amplification. With a low detection limit of 0.66 fM and a wide linear dynamic range from 10 fM to 100 nM, this aptasensor showed good results in the detection of KNM in real samples. Therefore, we envision it can provide a useful method for KNM detection in actual samples.
研究领域:
生物化学
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食品科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yong’an Tang,Jun Hu,Ahmed H. Elmenoufy,Xiangliang Yang
Photodynamic therapy (PDT) for deep-seated tumor is largely impeded by the limited penetration depth of excitation light in tissue. X-ray is considered as an ideal energy source to activate photosensitizers (PSs) located deep within the body with the assistance of scintillating nanoparticles (ScNPs). However, the efficacy under this concept is not satisfying due to the low scintillating luminescence and weak energy transfer from ScNPs to PSs. Here, mesoporous LaF3:Tb ScNPs were successfully synthesized by a facile hydrothermal process to act as PS carriers and X-ray energy transducers, owing to their good ionizing radiation stopping power and high luminescence efficiency. The formation mechanism of porous structure was elucidated in detail with classical crystallization theory. After a systematic investigation, LaF3:Tb ScNPs with optimized scintillating luminescence were obtained for loading Rose Bengal (RB) to establish an efficient FRET system, owing to their excellent spectral match. The FRET efficiency between ScNPs and RB was calculated to be as high as 85%. Under irradiation, enhanced 1O2 generation induced by LaF3:Tb-RB nanocomposites via FRET process was detected. This LaF3:Tb-RB FRET system shows great potential to be applied in X-ray stimulated PDT for deep-seated tumors in the future.
研究领域:
肿瘤学
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纳米医学
·
光动力治疗
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分子影像
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放射化学
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生物材料
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转化医学
✓ 已验证
DOI
高影响因子
ANALYST
·
2017
·Vol. 142
·期 22
·4240-4246
·
IF 3.885
Huihui Li,Jin Shen,Rongwei Cui,Chongmei Sun,Yanyan Zhao,Xia Wu,Na Li,Bo Tang
Highly selective determination of dopamine (DA) over other catecholamines is an urgent need for the precise diagnosis and therapy of DA related diseases. Herein, a new formate-bridged Tb(III)-complex and silver nanoparticles (AgNPs) enhanced fluorescent nanosensor was constructed. HCOO− acted as a co-ligand of Tb(III) and also as a linker between the Tb(III) complex and AgNPs and more readily combined with the primary amine of DA than with epinephrine (EP). The formate-bridged action strengthened AgNPs-based surface enhanced fluorescence of the Tb3+-DA complex and improved the selectivity towards DA. Under neutral buffer conditions, the detection limit for the assay of DA was down to 0.15 nM (S/N = 3) with a linear range from 0.5 nM to 100 nM (R2 = 0.9978). Furthermore, the nanosensor could successfully distinguish DA from EP.
研究领域:
分析化学
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纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 192
·期 1
·1-12
·
IF 5.3
Liu Xiang,Li Huijun,Sun Junjun,Shi Jianchao,Xu Zhouqing,Wang Yan
A HPU-23@Ru@Tb-NH 2 sensor array with light-driven oxidase-mimicking activity and triple-emission fluorescence was developed. It was composed of a Tb 3+ -functionalized metal organic framework and Ru(bpy) 3 2+ and applied to the simultaneous detection of Hg 2+ , ClO − , and PO 4 3− via differently responsive channels. HPU-23@Ru@Tb-NH 2 had a photoresponsive colorimetric response toward Hg 2+ with a LOD as low as 4.18 nM. In addition, the three emissions of the HPU-23@Ru@Tb-NH 2 sensor array were influenced by ClO − and PO 4 3− to varying degrees, causing remarkably distinguishable responses for the fluorescence channels to discriminate ClO − and PO 4 3− from each other. The detection limits of ClO − and PO 4 3− were 12.26 µM and 0.197 nM, respectively. Therefore, this work demonstrates the feasibility of multi-emission and multi-mode sensing platform, which is able to combine the advantages of different strategies for solving the problems of various toxic substances coexisting in the environment while meeting the needs of accurate and precise results and no side interferences. Graphical
研究领域:
分析化学
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环境科学
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生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2019
·
IF 4.527
Zeyu Wang,Cong Chen,Huan Liu,Dzmitry Hrynshpan,Tatsiana Savitskaya,Jianmeng Chen,Jun Chen
Multi-walled carbon nanotubes (MWCNTs) promote biodegradation in water treatment , but the effect of MWCNT on denitrification under aerobic conditions is still unclear. This investigation focused on the denitrification performance of MWCNT and its toxic effects on Alcaligenes sp. TB which showed that 30 mg/L MWCNTs increased NO 3 - removal efficiency from 84% to 100% and decreased the NO 2 - and N 2 O accumulation rates by 36% and 17.5%, respectively. Nitrite reductase and nitrous oxide reductase activities were further increased by 19.5% and 7.5%, respectively. The mechanism demonstrated that electron generation (NADH yield) and electron transportation system activity increased by 14.5% and 104%, respectively. Cell membrane analysis found that MWCNT caused an increase in polyunsaturated fatty acids, which had positive effects on electron transportation and membrane fluidity at a low concentration of 96 mg/kg but caused membrane lipid peroxidation and impaired membrane integrity at a high concentration of 115 mg/L. These findings confirmed that MWCNT affects the activity of Alcaligenes sp. TB and consequently enhances denitrification performance.
研究领域:
环境科学
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生物技术
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水处理
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 8
·10734-10749
·
IF 2.478
Kabir Fazal,Murtaza Adil,Saeed Azhar,Ghani Awais,Ali Anwar,Khan Saleh,Kaili Li,Qizhong Zhao,Kang Yao Kang,Yang Sen
Room temperature ferromagnetism with the doping of magnetic ions in the semiconducting host is the fundamental criterion for the potential use of spintronics material. In the present study, pure and (Fe, Tb) co-doped ZnO nanoparticles were well-prepared via the co-precipitation method, and corresponding microstructural, magnetic, and optical properties were investigated. The formation of Wurtzite hexagonal crystal structure of pure and doped ZnO was confirmed by X-ray diffraction (XRD) studies. No secondary phase was detected in all samples. Microstructural analysis reveals the spherical morphology of synthesized particles with the average size in the nanometer range. Fourier transforms infrared spectra show Tb–Zn–O stretching at 550 cm −1 . Optical absorption spectra show that the bandgap decreases and the absorption band slightly shift toward the visible region with increasing Tb doping, which may be due to the transfer of charge between the Tb ion 4f level and ZnO valance band. The photoluminescence (PL) spectrum exhibits a strong emission in the visible range, and PL emission intensity decreases with increasing Tb concentration and is anticipated to be due to the low recombination rate of electron–hole pairs. Most importantly, the room temperature ferromagnetism (RTFM) was observed in the doped ZnO nanoparticles, ascribed to the bound magnetic polaron (BMP) mechanism. The optical and magnetic outcome demonstrates that prepared (Fe, Tb) co-doped ZnO based dilute magnetic semiconducting (DMS) material are potential candidates for spintronics applications.
研究领域:
材料科学
·
纳米技术
·
自旋电子学
·
固体物理
✓ 已验证
DOI
高影响因子
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.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
药剂学
✓ 已验证
DOI
PubMed
高影响因子
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