INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 12
·6597
·
IF 6.208
Yaowei Guo,Jin Liu,Qinglin Tang,Cuicui Li,Yanying Zhang,Yao Wang,Yanxin Wang,Yupeng Bi,Christopher D. Snow,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
The clinical use of anticancer drugs necessitates new technologies for their safe, sensitive, and selective detection. In this article, lanthanide (Eu3+and Tb3+)-loaded γ-cyclodextrin nano-aggregates (ECA and TCA) are reported, which sensitively detects the anticancer drug irinotecan by fluorescence intensity changes. Fluorescent lanthanide (Eu3+and Tb3+) complexes exhibit high fluorescence intensity, narrow and distinct emission bands, long fluorescence lifetime, and insensitivity to photobleaching. However, these lanthanide (Eu3+and Tb3+) complexes are essentially hydrophobic, toxic, and non-biocompatible. Lanthanide (Eu3+and Tb3+) complexes were loaded into naturally hydrophilic γ-cyclodextrin to form fluorescent nano-aggregates. The biological nontoxicity and cytocompatibility of ECA and TCA fluorescent nanoparticles were demonstrated by cytotoxicity experiments. The ECA and TCA fluorescence nanosensors can detect irinotecan selectively and sensitively through the change of fluorescence intensity, with detection limits of 6.80 μM and 2.89 μM, respectively. ECA can safely detect irinotecan in the cellular environment, while TCA can detect irinotecan intracellularly and is suitable for cell labeling.Keywords:lanthanide (Eu3+, Tb3+) complex;γ-cyclodextrin;nano-aggregate;sensing;anticancer drug;irinotecan
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 14
·11174-11183
·
IF 2.779
Cui Zheng,Deng Guowei,Xu Pan,Liu Xiaoyang,Yang Min,Wang Qiliang
In this work, doped and co-doped LaNbO 4 :RE 3+ (RE = Eu, Eu/Tb, Tb) single crystals were prepared by a unique hydrothermal method under the condition of supercritical water and a wide temperature range (823–923 K). The crystal structure of LaNbO 4 :Eu 3+ /Tb 3+ were refined by virtue of the Rietveld method, which can determine the occupation position of dopants. The luminescence properties of Eu 3+ /Tb 3+ -doped LaNbO 4 phosphors were carefully measured and analyzed by diffuse reflectance spectra and ultraviolet. The energy transfer was recognized between host and doped Eu 3+ /Tb 3+ ions based on the luminescence spectra and decay lifetimes, which is dominated by electric multipolar interaction. The results show that the strong emission peaks at 491 nm ( 5 D 4 – 7 F 6 ), 550 nm ( 5 D 4 – 7 F 5 ), 590 nm ( 5 D 4 – 7 F 4 ), 623 nm ( 5 D 4 – 7 F 3 ) can be observed at the optimum reaction temperature of 650 °C, corresponding to CIE coordinates (0.3398, 0.3288). By adjusting the concentration of Eu 3+ /Tb 3+ ions, the emission colors of LaNbO 4 :Eu 3+ /Tb 3+ are varied from blue to pink and to white. Consequently, the synthesis strategy reported herein not only holds extensive promise for expanding the preparation techniques of materials with good luminescence properties but also promotes the practical applications of LaNbO 4 single crystal in low color temperature and high index white light-emitting diode (WLED).
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CRYSTENGCOMM
·
2013
·Vol. 15
·期 41
·8262-8272
·
IF 3.879
Qin Wang,Yunxia Liu,Baocang Liu,ZhanLi Chai,Guangran Xu,ShengLi Yu,Jun Zhang
Cubic α- and hexagonal β-phase lanthanide luminescent NaYF4:Eu3+/Tb3+ nanostructures with diverse morphologies were successfully synthesized via a mild solvothermal method. The effects of the synthetic parameters on the crystal phase structure, size and morphology of NaYF4:Eu3+/Tb3+ nanostructures were systematically investigated. By modifying the synthetic parameters, the crystal phase structure, size and morphology were well controlled, and the phase transition from cubic α- to hexagonal β- can be easily realized. Furthermore, the morphology evolution is revealed, and the surfactant modulating formation mechanisms with diverse morphologies was proposed. The photoluminescence properties were found to be in close correlation with their composition, phase structure and morphology. NaYF4:Eu3+/Tb3+ nanostructures possessing unique morphologies and highly efficient luminescence may find potential applications in optoelectronics, sensors and biolabels.
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Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 16
·4022-4029
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IF 7.779
Peng Zhang,Wanying Xie,Zhenbin Wang,Zenggang Lin,Xiuxiang Huang,Zhenghua Ju,Weisheng Liu
Long-persistent luminescence (PersL) materials have shown great promise on account of their diverse utilization in anticounterfeiting and encryption. Nevertheless, time-dependent dynamic multicolor afterglow is rarely reported, especially for single-component oxide-based materials. In this work, a series of LiGa5O8:Eu3+/Tb3+ phosphors exhibit time-dependent dynamic multicolor afterglow from blue to red or green over several seconds after ceasing the excitation. Both experimental and computational data confirm that the color evolution results from different energy transfer processes between traps and luminescent centers. The processes are probably controlled by thermally activated exciton diffusion and the electron tunneling effect. This dynamic multicolor afterglow of LiGa5O8 phosphors allows their applications in anticounterfeiting and encryption with high security levels.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Fang Fang,Yuanhao Chen,Boyan Liu,Xiaoshan Zhang,Benchun Li,Dawei Zhang,Dechao Yu
Red-emitting phosphors efficiently excited by near-ultraviolet (NUV) light are desired for high-quality phosphor-converted white LED (pc-WLED) devices. In this work, Eu 3+ /Tb 3+ codoped NaBiF 4 phosphors were designed as promising NUV-excitable candidates for the red component in pc-WLEDs. Under 379 and 395 nm excitation, the NaBiF 4 :Eu 3+ ,Tb 3+ samples yield intense red emissions, predominantly at 616 nm due to the 5 D 0 → 7 F 2 transition of the Eu 3+ ion. The Tb 3+ dopants bring in synergistic effects in greatly enhancing the Eu 3+ red luminescence, i.e. resonant energy transfer (ET) from Tb 3+ to Eu 3+ and crystal field perturbation surrounding Eu 3+ . The relevant spectroscopic properties were systematically studied using steady-state and time-resolved fluorescence spectroscopy. The optimized NaBiF 4 :20%Eu 3+ ,15%Tb 3+ sample features a nearly complete Tb 3+ → Eu 3+ ET, leading to a pure Eu 3+ red luminescence, and showing quantum yield values of 44.2% and 51.6% upon 379 and 395 nm excitation, respectively. Notably, the red luminescence from the NaBiF 4 :20%Eu 3+ ,15%Tb 3+ system has a high thermal stability, which at 398 K sustains 80.2% of its room-temperature luminescence intensity under 395 nm excitation. Via coating a mixture of commercial BaMgAl 10 O 17 :Eu 2+ blue- and (Ba,Sr) 2 SiO 4 :Eu 2+ green-emitting phosphors and the optimized phosphor on NUV ∼ 380 and 395 nm LED chips, the homemade 395 nm-excited pc-WLED exhibited interesting warm lighting performance, i.e. color rendering index (Ra) ∼ 90 and correlated color temperature (Tc) ∼ 3884 K, while the 380 nm-excited pc-WLED had Ra ∼88 and Tc ∼ 4685 K. That is, the NUV ∼395 nm chip (illumination also overlapping with the Tb 3+ absorption around 380 nm) is practically preferable to excite the Tb 3+ /Eu 3+ pc-LED for high-qualified warm white lighting. All the results unveil the viable schemes to develop the Eu 3+ /Tb 3+ co-activated red-emitting phosphors, offering promising prospects for novel NUV-excitable pc-WLED light sources.
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DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 46
·16696-16703
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IF 4.099
Lifei Xu,Yan Xu,Xianliang Li,Zhuopeng Wang,Ting Sun,Xia Zhang
The rational design strategy to construct lanthanide ion functionalized metal organic frameworks (MOFs) has attracted tremendous attention as they are promising candidates for developing novel luminescence materials and optical sensors owing to their intense, long-lived and tunable luminescence performances. In this work, a series of Eu3+/Tb3+ singly doped or codoped bismuth-based MOFs were prepared under in situ facile solvothermal conditions using BiOBr nanoplates as bismuth resources. A red-green-blue-based trichromatic white-light emission can be finely achieved by modulating the doping ratio of Eu3+/Tb3+ in the blue-emitting Bi-MOF host material and such photoluminescence tuning can also be realized by controlling the excitation wavelength. In addition, the Eu3+/Tb3+ singly incorporated Bi-MOF can serve as a multifunctional fluorescent probe for sensing Fe3+ and Cr2O72− ions in aqueous solution, as well as small organic pollutants of acetone molecules, and their sensing mechanisms have also been analyzed. These lanthanide ion functionalized Bi-MOF materials exhibit great potential in exploring white-light emitting devices and construction of supersensitive multifunctional sensors.
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PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2014
·Vol. 90
·期 6
·1462-1466
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IF 2.684
Ying Mei,Bing Yan
A special multifunctional ionic liquid compound (1-methyl-3-(2-(thiocarboxyoxy)-ethyl)-2H-imidazole-1,3-diium bromide (SHIL)) is used as the chemical bridge to link lanthanide beta-diketonates and polymer resin, which are designated as Ln(L) 4 -SHIL-WR/MR (Ln = Eu, Tb, Sm; L = thenoyltrifluoroacetonate (TTA), acetylacetonate (AA), dibenzoylmethane (DBM); WR = Wang resin, MR = Merrifield resin). Among SHIL and polymer resin are assembled to form covalently bonded system through condensation reaction. Then tetrakis lanthanide beta-diketonates are linked to SHIL through ion-exchange reaction. Physical characterization and especially the photoluminescent performance of the multicomponent hybrids are studied. The hybrid materials possess good stability and excellent luminescent property. The results provide useful path to obtain luminescent hybrids for further practical application.
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Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 26
·9606-9616
·
IF 5.7
Shilei Yan,Dongming Pi,Yingzhu Zi,Heping Zhao,Rongbao Feng,Keliang Ruan,Jianbei Qiu,Zhiguo Song,Anjun Huang,Yue Liu,Yangke Cun,Zhengwen Yang
The demand for accurate temperature readings in harsh high-temperature environments includes miniaturization, flexibility, visualization, and integrability of temperature sensors with the growing need for human development. Rare earth-doped non-contact fluorescence intensity ratio (FIR) temperature sensors have received widespread attention due to their high detection accuracy and fast response ability. However, the limitations of thermal quenching (TQ) and thermal coupling energy level differences restrict their applications. In this work, a novel temperature sensing method in Eu3+/Tb3+-doped Y2Mo3O12 negative thermal expansion (NTE) materials is proposed, which depends on different energy transfer characteristics of Eu3+- and Tb3+-doped NTE materials. Under a 295 nm excitation laser, the Y2Mo3O12:Eu3+ phosphor achieved 600% enhancement due to the charge-transfer band (CTB) absorption between O2− and MoO42−. At 573 K, the luminescence intensity of Y2Mo3O12:Tb3+ is reduced by 30 times due to the absence of energy transfer between the Tb3+ ions and Y2Mo3O12 NTE materials. The Y2Mo3O12:Eu3+/Tb3+ mixing materials enhance the relative luminescence intensity and solve the thermal coupling energy level differences, achieving high sensitivity and resolution (maximum Sr = 2.56% K−1 at 453 K). The Y2Mo3O12:Eu3+/Tb3+ flexible thin film achieves multiple naked-eye color spans, breaking free from the limitations of optical detection instruments and demonstrating strong potential for robust and direct temperature reading without equipment. This demonstrates their superior advantages for visualizing real-time high-temperature sensing with nonplanar surfaces, thermal defect diagnosis systems, intelligent battery monitoring systems, and other high-temperature sensing fields.
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RSC Advances
·
2015
·Vol. 5
·期 57
·45693-45702
·
IF 3.84
Anming Li,Dekang Xu,Hao Lin,Shenghong Yang,Yuanzhi Shao,Yueli Zhang,Zhenqiang Chen
Well-crystallized and uniform NaGd(MoO4)2 microcrystals with morphologies of bipyramids, truncated bipyramids, quasi-cubes and tetragonal plates were selectively synthesized via a facile hydrothermal method without any additives under mild conditions. The effects of Na2MoO4/Gd(NO3)3 molar ratios and pH values of precursor solutions on the phase and morphology of the as-synthesized microcrystals were systematically investigated. The molar ratios and pH values played key roles in the selective synthesis of pure phase NaGd(MoO4)2 microcrystals with regular morphology. With increasing Na2MoO4/Gd(NO3)3 molar ratios in the appropriate pH range, the morphology of the products changed from bipyramids, truncated bipyramids, quasi-cubes to tetragonal plates, namely, the morphological truncation degree increased gradually. NaGd(MoO4)2 tetragonal microplates could be synthesized at the molar ratio of 9 : 1. A possible morphological formation mechanism of NaGd(MoO4)2 tetragonal microplates was proposed, i.e. nucleation-Ostwald ripening growth process. Color tunable photoluminescence properties of NaGd(MoO4)2:Eu3+,Tb3+ microcrystals were studied in detail. Among the different morphologies of NaGd(MoO4)2:5% Eu3+ microcrystals, tetragonal microplates had a broadened, red-shifted and enhanced charge transfer band in the excitation spectrum. What's more, the full-width at half-maximum for the charge transfer band of the tetragonal plates was highest (58 nm), which favored efficient excitation and absorption in the ultraviolet region. The introduction of a small amount of Tb3+ into NaGd(MoO4)2 microplates doped with Eu3+ would enhance the 5D0 → 7FJ transition of Eu3+ at 616 nm due to the energy transfer process of cross-relaxation from Tb3+ to Eu3+. Multicolor tunable luminescence from deep red, red, orange, yellow to green under 291 nm ultraviolet excitation and from red, reddish orange to pink under 380 nm near-ultraviolet excitation could be obtained in NaGd(MoO4)2 tetragonal microplates by simply adjusting the doping concentrations of Eu3+ and Tb3+, suggesting NaGd(MoO4)2:Eu3+,Tb3+ microcrystals might have practical application in optoelectronic devices, such as light emitting diodes and color display systems. This facile morphology-controlled hydrothermal synthesis strategy was simple, low-cost and environment-friendly, and might be extended to other inorganic materials.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jin Liu,Yaowei Guo,Yupeng Bi,Yao Wang,Yanxin Wang,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
Reversible bright-dark luminescence nanomaterials have been developed for information storage and anti-counterfeiting in recent years, however, their monochrome characteristic and 2D patterning impose limits on the effective information storage density. In this work, a new strategy for producing ultraviolet switchable and stable luminescent patterns is proposed, based on Ln 3+ (Eu 3+ /Tb 3+ ) induced-polyelectrolyte aggregates (LIPAs) with sharp multi-color optical properties . Under 365 nm excitation, a multicolor pattern can be observed using both red and green, which is not visible when this excitation light source is off. The LIPAs enable the luminescent lanthanide complexes to be compatibilized with poly(lactic acid) (PLA). Functional anti-counterfeiting patterns were prepared by 3D printing using luminescent PLA containing by Ln 3+ (Eu 3+ /Tb 3+ ) LIPAs. Invisible, adjustable and ultra-stable multicolor luminescent patterns well enable information storage and enhance information security for anti-counterfeiting applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2013
·
IF 3.172
Yan Zhao,Bing Yan
GaN-functionalized rare earth (Eu 3+ and Tb 3+ ) organic/inorganic mesoporous nanocomposites have been successfully synthesized (designated as RE(L SBA-15) 3 (L GaN); RE = Eu, Tb; L = TAA Si, BTA Si). The organosilane precursor materials (L SBA-15) are synthesized by co-condensation of tetraethylorthosilicate (TEOS) and the functionalized β-diketones (TAA Si and BTA Si) in the presence of Pluronic P123 surfactant as a template. The modified β-diketones ligands are also used to covalently bond with surface-modified GaN and formed another precursor L GaN. Both of the precursors can coordinate with rare earth ions to synthesize the final mesoporous materials via a sol–gel process. FTIR, TEM, XRD, and nitrogen (N 2 ) adsorption/desorption measurements are employed to characterize the mesostructure of RE(L SBA-15) 3 (L GaN). The luminescence properties and thermogravimetric analysis of all the prepared materials are characterized in detail, and the results reveal that a series of uniformed mesopore structure hybrid materials has been achieved. The mesoporous material Eu(BTA Si SBA-15) 3 (BTA Si GaN) has better luminescence intensity, higher quantum efficiency, and longer lifetime than Eu(TAA Si SBA-15) 3 (TAA Si GaN). While the nanocomposite Tb(TAA Si SBA-15) 3 (TAA Si GaN) revealed the strongest characteristic emission of Tb 3+ ions than Tb(BTA Si SBA-15) 3 (BTA Si GaN), the excellent luminescent properties and thermal stability enable the hybrid mesoporous material to have potential applications in optical field.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
·
IF 3.07
Qiu-Ping Li,Bing Yan
A series of ternary rare earth (Eu 3+ , Tb 3+ ) complexes are covalently coated to the 3-aminopropyltriethoxysilane functionalized multi-walled carbon nanotube (MWCNT) by a simple in situ sol–gel method by the bifunctional silylated monomer TTA-Si and TAA-Si (TTA-Si and TAA-Si are 3-(triethoxysilyl)propylisocyanate (TEPIC) modified thenoyltrifluoroacetone (TTA) and trifluoroacetylacetone (TAA), respectively). The resulting materials are characterized by Fourier transform infrared spectra, scanning electronic microscope, transmission electron microscope, thermogravimetric analysis, ultraviolet visible diffused reflection measure, photoluminescence spectra, and X-ray diffraction. The photoluminesce measurements indicated that these hybrids exhibit characteristic red and green luminescence originating from the corresponding ternary rare earth ion (Eu 3+ , Tb 3+ ). The luminescence quenching effect of MWCNT networks have been successfully restrained by coating a relatively thicker silica–oxygen-based organic–inorganic complex. Furthermore, the fluorescence lifetimes and emission quantum efficiencies of Eu 3+ hybrid materials are also determined.
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