LUMINESCENCE
·
2022
·Vol. 37
·期 10
·1793-1799
·
IF 2.613
Piaotong Liu,Rusi Hao,Wenliang Sun,Ziyi Lin,Tianfeng Jing
The increasing degradation of ecosystems due to heavy metal residues has led to environment and food contamination, prompting the development of convenient platforms for monitoring heavy metals. Here, a new dual-emission fluorescent sensor CuNCs@Tb@UiO-66-(COOH) 2 for the detection of copper ions (Cu 2+ ) has been synthesized using one-pot encapsulation of Tb(III) and glutathione-stabilized copper nanoclusters (CuNCs) into metal–organic frameworks (MOFs) UiO-66-(COOH) 2 . In this ratiometric sensor, the fluorescence intensity of Tb 3+ decreased significantly upon the addition of Cu 2+ , whereas that of CuNCs showed good stability, together with an apparent colour change. Therefore, ratiometric fluorescence detection of Cu 2+ can be accomplished by measuring the ratio of the fluorescence intensity at the 450 nm (F 450 ) wavelength of CuNCs to the 548 nm (F 548 ) emission of Tb 3+ in the fluorescence spectra of the CuNCs@Tb@UiO-66-(COOH) 2 suspension. Moreover, the obtained fluorescent probe showed good results in the detection of actual samples. This work can provide the basis of method for the exploration of ratiometric fluorescence and visual sensors of trace pollutants analysis in complicated samples.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 13
·5688-5695
·
IF 3.269
Xiaoming Xie,Jie Chen,Ye Sheng,Yanhua Song,Xiuqing Zhou,Xiangting Zhang,Zhan Shi,Haifeng Zou,Keyan Zheng
A series of novel color tunable dandelion-like SiO2:Ln3+ (Ln = Eu, Tb) nanophosphors of approximately 70 nm diameter were prepared using a simple hydrothermal route. The phase, time-dependent shape evolution, morphology, sizes, and luminescence properties of the as-prepared products were well characterized by means of X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectrometry, and photoluminescence spectra as well as kinetic decay curves. Under ultraviolet excitation, the Eu3+ and Tb3+ singly doped SiO2 samples showed strong red and green emission, respectively. Furthermore, the luminescence colors of the as-prepared Tb3+, Eu3+ co-doped dandelion-like SiO2 nanophosphors could be altered from green to red, including green-yellow, yellow, orange yellow and reddish orange, by simply adjusting the doping concentrations of Eu3+.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Ce Tao,Jianqiang Li,Rukang Li
A new series of rare earth bismuth silicates has been synthesized by flux method and solid state reaction . LnBiSiO 5 (Ln = Ce, Tb) crystallizes in a triclinic space group P -1 with cell parameters a = 5.6763(2) Å, α = 105.591(3)° b = 6.7922(3) Å, β = 110.551(3)° c = 6.9593(2) Å, γ = 99.733(3)°, Z = 2. They exhibit a novel three-dimensional structure consisting of zig-zag chains of edge-sharing Ce/TbO 8 polyhedra that are further linked by SiO 4 units and Bi 2 O 8 clusters. The optical band gap (E g ) of TbBiSiO 5 was estimated to be 3.84 eV from UV–Vis-IR diffuse reflectance spectra. Photoluminescence measurements suggest that due to the cooperative interaction of Bi and Tb the excitation bands monitored at 544 nm are shifted towards longer wavelength which may favor commercial UV diode excitation. The magnetic measurements show that TbBiSiO 5 exhibits paramagnetic behavior without magnetic transitions down to 1.8 K.
研究领域:
材料科学
·
固体化学
·
光学材料
·
磁性材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Hongying Tang,Ge Chao,Jian Gao,Yuntao Shang,Nanwen Li,Kang Geng
To further mitigate the phosphoric acid leakage in high temperature proton exchange membrane (PEM), the microporosity of Tröger's base (TB) membrane based on a V-shaped bridged bicyclic diamine has been fine-tailored readily by polymeric blending with a miscible polymer of intrinsic microporosity (PIM-1). As expected, the average cavity radius in the range of 3.46–4.21 Å has been achieved when the blending ratio of PIM-1 increases from 5 to 20 mol% due to the interaction between the amine group of TB and the nitrile group of PIM-1. The resulting PEMs show excellent PA retention ability. Notably, PIM/TB9 membrane with a suitable cavity radius of 3.5 Å and largest FFV 4 of 49.1% exhibits an exciting PA retention of about 80%, which is much better than the pristine TB membrane. Thus, the remaining proton conductivity of PIM/TB9 is almost 5 times higher than that of TB membrane after 22 relative humidity cycle tests. Moreover, the resulting cell can run smoothly within a wide temperature range from 0 to 160 °C. The single cell performs for over 150 AST cycles and remains stable for >600 h with no visible voltage decay at 80 °C. Therefore, these results indicate the technical feasibility to improve the PA retention via fine-tuning the intrinsic microporosity of the PEMs through a direct blending method.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 6
·994
·
IF 5.3
Wei Dong,Qin Zhou,Wangqiang Shen,Le Yang,Peng Jin,Xing Lu,Yongfu Lian
Soot-containing terbium (Tb)-embedded fullerenes were prepared by evaporation of Tb4O7-doped graphite rods in an electric arc discharge chamber. After 1,2,4-trichlorobenzene extraction of the soot and rotary evaporation of the extract, a solid product was obtained and then dissolved into toluene by ultrasonication. Through a three-stage high-pressure liquid chromatographic (HPLC) process, Tb@C82(I, II) isomers were isolated from the toluene solution of fullerenes and metallofullerenes. With the success of the growth of cocrystals of Tb@C82(I, II) with Ni(OEP), the molecular structures of Tb@C82(I) and Tb@C82(II) were confirmed to be Tb@C2v(9)-C82and Tb@Cs(6)-C82, respectively, based on crystallographic data from X-ray single-crystal diffraction. Moreover, it was found that Tb@C82(I, II) isomers demonstrated different packing behaviors in their cocrystals with Ni(OEP). Tb@C2v(9)-C82forms a 1:1 cocrystal with Ni(OEP), in which Tb@C2v(9)-C82is aligned diagonally between the Ni(OEP) bilayers to form zigzag chains. In sharp contrast, Tb@Cs(6)-C82forms a 2:2 cocrystal with Ni(OEP), in which Tb@Cs(6)-C82forms a centrosymmetric dimer that is aligned linearly with Ni(OEP) pairs to form one-dimensional structures in the a–c lattice plane. In addition, the distance of a Ni atom in Ni(OEP) to the Cs(6)-C82cage is much shorter than that to the C2v(9)-C82one, indicative of a stronger π-π interaction between Ni(OEP) and the C82carbon cage in the cocrystal of Tb@CS(6)-C82and Ni(OEP). Density functional theory calculations reveal that the regionally selective dimerization of Tb@CS(6)-C82is the result of a dominant unpaired spin existing on a particular C atom of the CS(6)-C82cage.Keywords:metallofullerene;terbium;cocrystals;centrosymmetric dimer;unpaired spin
研究领域:
材料科学
·
化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Shengdi Tai,Chengjian Zhang,Shuaibo Shi,Kang Yang,Shaolong Han,Jinyu Wu,Shishen Zhang,Kun Zhang
The increasing demands in fields of anti-counterfeiting, fluorescence analysis, clinical therapy and LED illumination are urgently eager for more excellent optically switchable luminescent materials with the stable and multimodal fluorescence in single-component matrix. Herein, the lanthanide-disalicylaldehyde coordination hybrid H 2 Q j4 /Tb x Eu y is proposed as an efficient luminescent matrix to connect terbium sensibilization with ESIPT (excited-state intramolecular proton transfer) effects, and three multi-emission hybrids are finally designed and synthesized by regulating Tb 3+ and Eu 3+ ratios. Surprisingly, the H 2 Q j4 /Tb 0.91 Eu 0.09 shows the excitation wavelength-dependent luminescence in solution which originates from two energy transfer ways of terbium sensibilization effect. It exhibits green and red lights under the 369 and 394 nm UV lamp, respectively. Three hybrids are further used as lab-on-a-molecule fluorescent probes to perform multianalyte detection for various solvents by selected fluorescent sensing channels. By means of PCA (principal component analysis) and HCA (hierarchical cluster analysis), all of them can successfully detect and discriminate17 common solvents, especially the H 2 O and D 2 O. Moreover, the H 2 Q j4 /Tb 0.91 Eu 0.09 also shows the wide linear responses of H 2 O content in D 2 O, discrimination of two-component solvent mixtures , hygroscopicity evaluation of D 2 O and information encryption which will advance the progress of multimodal luminescent materials and multianalyte chemosensors .
研究领域:
材料科学
·
光学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Science China-Technological Sciences
·
2022
·Vol. 65
·期 5
·1043-1051
·
IF 3.903
Yang Sen,Pan XiaoRui,Tang JianPu,Yao Chi,Yang DaYong
Supramolecular DNA hydrogels have been synthesized based on the assembly of DNA building-blocks such as branched DNA and long DNA chains. The structures and functions of sole-module DNA hydrogels remain limitations. New methodologies by integrating hybrid components are desired to expand the synthesis of DNA hydrogel. Herein, we synthesized a Ln 3+ -containing luminescent supramolecular hydrogel by employing the coordination and electrostatic interactions between lanthanide ions (Tb 3+ and Eu 3+ ) and linear single-stranded DNA (ssDNA). Through the coordination between ssDNA and Ln 3+ , a series of luminescent supramolecular hydrogels were synthesized, among which the Tb-G n /T n and Eu-T n hydrogels emitted the characteristic luminescence of Tb and Eu, respectively. The luminescent intensities of the hydrogels were adjusted by designing DNA sequences with programmable bases and chain lengths. Notably, the Tb/Eu co-doped luminescent supramolecular hydrogel displayed tunable luminescence from green to yellow by regulating the stoichiometric ratio of Tb/Eu. Moreover, the hydrogel had reversible luminescent stimulation responsiveness toward Ag + /L-Cys. We expected that the synthesis of Ln 3+ -containing luminescent supramolecular hydrogels enriched the strategies of the construction of DNA hydrogels, and promoted the development of stimuli-responsive supramolecular materials.
研究领域:
材料科学
·
化学
·
纳米技术
·
生物物理
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 21
·5645-5652
·
IF 7.779
Yuan Lin,Chun-Li Hu,Zhi Fang,Jin Chen,Wei-Jie Xie,Yan Chen,Jian-Pu Wang,Jiang-Gao Mao
Three new potassium rare earth carbonates, namely KRE(CO3)2 (RE = Eu, Gd, Tb), were synthesized successfully. Their structures feature a novel [RE(CO3)2]− 3D framework with 1D channels along the c axis filled with K+ cations. Among them, KEu(CO3)2 and KTb(CO3)2 emit strong red and green photoluminescence, respectively. The birefringence values of KRE(CO3)2 were measured as 0.149, 0.162 and 0.215 at 546 nm, respectively. Remarkably, KTb(CO3)2 has the largest experimental birefringence among carbonates reported.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
·
2019
·Vol. 73
·期 7
·1761-1766
·
IF 1.246
Zhang Li-hui,Zhou Yan-biao,Li Wei-li,Zhao Xu-yao,Wang Ya-bo
Lu(OH)CO 3 :Ln 3+ /LuBO 3 :Ln 3+ (Ln = Eu, Tb) nanospheres have been synthesized by the soft chemistry route. This synthesis process does not require the addition of any organic solvents and surfactant. The whole process consists of homogeneous precipitation and hydrothermal process. First, uniform spherical Lu(OH)CO 3 :Ln 3+ (Ln = Eu, Tb) nanoparticles with the sizes of 70 nm were obtained by the classic urea-based homogeneous precipitation. Then, with the above Lu(OH)CO 3 :Ln 3+ (Ln = Eu, Tb) nanosphere as the precursor, the composites of Lu(OH)CO 3 :Ln 3+ /LuBO 3 :Ln 3+ (Ln = Eu, Tb) nanospheres formed by the simple hydrothermal process. The phases, morphologies, as well as the luminescence properties of as-prepared samples were characterized by means of X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and photoluminescence. Under a short wavelength excitation, the down-conversion Eu 3+ and Tb 3+ -doped LuBO 3 samples were investigated and explained.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Qing-Gang Yue,Sheng-Hua Zhou,Bingxuan Li,Xin-Tao Wu,Hua Lin,Qi-Long Zhu
Multinary rare-earth chalcogenides with d-block transition metals have attracted considerable attention owing to their intriguing structural architectures and promising practical applications. In this work, three quaternary rare-earth sulfides, Ba4RE2Cd3S10 (RE = Sm, Gd, or Tb), have been obtained by the high-temperature solid-state method. These compounds are isostructural and belong to the noncentrosymmetric orthorhombic space group Cmc21 (No. 36). The basic structural unit contains unique two-dimensional anionic [RE2Cd3S10]8– layers, which are separated by Ba2+ cations. Remarkably, Ba4Sm2Cd3S10 exhibits a high second-harmonic-generation intensity (1.8 times that of AgGaS2) and a significantly higher laser-induced damage threshold (14.3 times that of AgGaS2), which is the first case possessing an infrared (IR) nonlinear optical (NLO) property in the quaternary AE/RE/TM/Q (AE = alkaline-earth metals; RE = rare-earth metals; TM = d-block transition metals; and Q = chalcogen) systems. Moreover, theoretical investigations of the structure–property relationship indicate that the combined action of various types of NLO-active units makes the main contribution to the SHG activity. This discovery may shed light on broadening the frontiers of IR-NLO materials.
研究领域:
材料化学
·
无机化学
·
非线性光学
·
固态化学
·
理论与计算化学
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
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
研究领域:
材料科学
·
高分子科学
·
纳米技术
·
发光材料
·
配位化学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Haiyan Cao,Bin Yang,Wenfei Dong,Wenbing Shi
Background The accurate detection of 2,3,5,6-tetramethylpyrazine (TMP) in complex matrices is significant for food quality control and biomedical analysis. Despite this need, a dedicated optical sensing platform for TMP has not been reported to date. Results Here, we present a novel ratiometric fluorescent probe based on a Tb–EDTA complex, which introduces a sensing strategy founded on coordination-induced modulation of the ligand-to-metal charge transfer (LMCT) process. Specific coordination of TMP's pyrazine nitrogen atoms to the Tb 3+ center results in a characteristic ratiometric response: quenching of the emission at 548 nm and concomitant enhancement at 650 nm. The probe exhibits excellent analytical performance with a linear range of 0.1―40 μM, a detection limit of 0.038 μM, and high selectivity over structurally similar interferents. Its practical applicability is demonstrated by reliable quantification of TMP in real samples, including sauce-flavor Baijiu, sake, and human urine, with recoveries of 94.54–104.82% and relative standard deviations below 10.57%. Significance This work establishes a pioneering optical sensing approach for TMP detection, providing a valuable analytical tool for flavor assessment in alcoholic beverages and pharmacological monitoring in biological systems.
✓ 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）