SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
·
IF 3.232
Shibing Chen,Shengjie Jiang,Hongyu Guo,Fafu Yang
Previously reported fluorescent sensors for Th 4+ experienced emission quenching or generated false positive signal upon aggregate formation in aqueous media. Herein, a simple and novel thorium sensor ( CDB-BA ) based on cyanodistyrene structure was designed and synthesized, which integrated the highly emitting characteristic of AIE effect and off-on response of PET modulation for the first time to construct the “turn-on” fluorescent probe for Th 4+ . Besides excellent selectivity, CDB-BA exhibited remarkable fluorescent enhancement which was linearly related to the concentration of Th 4+ in the range of 0.25–8 μM. The detection limit was attained 0.074 μM, which was lower than that of most previously reported sensors. The mechanism of tris-chelate complex of CDB-BA with Th 4+ was confirmed by mass spectra, IR spectra and DFT calculation. The excellent Th 4+ sensing ability of CDB-BA was successfully applied to detecting Th 4+ on TLC plates, in real water samples and living-cell imaging. This work suggested that the combination of AIE and PET photophysical mechanism could offer the merits of minimized background and enhanced signal fidelity to develop novel “turn-on” fluorescent probe in complicated aqueous environment and biological research.
研究领域:
化学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Bo Liu,Yanhong Tan,Qinghua Hu,Yuyuan Wang,Yu Mao,Peng Tao,Hongqing Wang
It is always a significant challenge to develop a probe for Th 4+ in the environment and in vivo under extreme acidity conditions, especially on real-time in the field. Herein, a new Th 4+ fluorescent probe N1′,N2′-bis((3-hydroxytetrastyrene-2yl)methylene malonohydrazide ( BH-TPE ) was designed and studied. It could realize to detect Th 4+ in a ratiometric way, which showed relative strong blue fluorescence at 450 nm and yellow-green fluorescence at 522 nm in the absence or present of Th 4+ , respectively, with good selectivity and sensitivity under extreme acidity environment. And the value of I 522 /I 450 of the probe had good linear relationship with Th 4+ ion concentration in the range of 0–10 μM and the low detection limit 2 × 10 −8 M. Meanwhile, it could monitor Th 4+ ion by “naked eye” in the field on real-time due to the BH-TPE solution changed from colorless to light green with the increase of Th 4+ . Moreover, the possible fluorescent mechanism was proposed. Most importantly, the viability of BH-TPE to Th 4+ ion was successfully applied to live cell imaging and environmental sample.
研究领域:
分析化学
·
生物医学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2013
·Vol. 298
·期 3
·1999-2008
·
IF 1.467
Pan Ning,Guan Debin,He Ting,Wang Ruibing,Wyman Ian,Jin Yongdong,Xia Chuanqin
The removal of Th 4+ ions from aqueous solutions was investigated using single-layer graphene oxide (GO) as a sorbent which was prepared by the modified Hummers’ method through batch adsorption experiments at room temperature. Structural characterizations of the sorbent were also investigated. The influences of the pH value of solution, contact time, sorbent dose, ionic strength, the initial metal ion concentration and temperature on the adsorption of Th 4+ were also investigated. These results indicated that the adsorption of Th 4+ was dependent on the pH and independent on the ionic strength. The sorbent provided significant Th 4+ removal (>98.7 %) at pH 3.0 and the adsorption equilibrium was achieved after only 10 min. The Langmuir adsorption isotherm fit the absorption profile very closely, and indicated that a maximum adsorption capacity of 1.77 mmol g −1 of GO (411 mg g −1 ) after 2 h. The thermodynamic parameters showed that this adsorption process was endothermic and spontaneous. Moreover, the desorption level of Th 4+ from GO, by using 0.1 mol L −1 H 2 SO 4 as a stripping agent, was 84.2 ± 1.2 %, and that of 0.5 mol L −1 HNO 3 as a stripping agent, was 79.8 ± 3.0 %.
研究领域:
环境科学
·
材料科学
·
核化学
·
水处理技术
·
吸附科学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Xiaofeng Zhao,Weipeng Wang,Yuancheng Teng,Yuxiang Li,Xue Ma,Yang Liu,Rajeev Ahuja,Wei Luo,Zhengjun Zhang
Rhabdophane is an important permeable reactive barrier to enrich radionuclides from groundwater and has been envisaged to host radionuclides in the backend of the nuclear fuel cycle. However, understanding of how An4+ and Sr2+ precipitate into rhabdophane by wet chemistry has not been resolved. In this work, Th4+ and Sr2+ incorporation in the rhabdophane/monazite structure as La1–2xSrxThxPO4·nH2O solid solutions is successfully achieved in the acid solution at 90 °C. Some specific issues such as lattice occupation of Th4+ and Sr2+, precipitation reaction kinetics, and crystal growth affected by starting stoichiometry are discussed in detail, along with investigating the chemical stability of La1–2xSrxThxPO4·nH2O precipitations and associated La1–2xSrxThxPO4 monazite. The results reveal that the excess of Sr2+ appears to be a prevailing factor with a suggested initial Sr: Th ≥ 2 to obtain the stability domain of La1–2xSrxThxPO4·nH2O (x = 0∼ 0.1). A rapid ion removal associated with a nucleation process has been observed within 8 h, and Th4+ can be removed more than 98% after 24 h in 0.01 mol/L solutions. From structural energetics based on density functional theory, the lattice occupation of Th4+ and Sr2+ is energetically favorable in nonhydrated lattice sites of [LaO8], although two-thirds of lattice sites are associated with [LaO8·H2O] hydrated sites. Intriguingly, the crystal transformation from rhabdophane to monazite associated with the transformation from [SrO8] to [SrO9] polyhedra can greatly improve the leaching stability of Sr2+.
研究领域:
核化学与放射化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Guang Wu,Shipeng He,Liwen Wang,Dating Tian
Thorium (Th) has a wide range of applications in industries such as medicine and the nuclear industry, so it is critical to develop effective detection technologies to avoid the hazards they pose to the environment and human health. In this study, we used 4, 4′, 4″-(1, 3, 5-triazine-2,4,6-triyl)tribenzoic acid (H 3 TATB) as the starting material to form a hydrogen-bonded organic framework (TATB-HOF) at room temperature by hydrogen-bonding self-assembly. We then functionalized it with Eu 3+ using a post-synthesis modification approach to produce a red-fluorescent HOF(Eu@TATB-HOF). The luminescence mechanism of Eu@TATB-HOF was caused by the ligand-to-metal charge transfer-assisted energy transfer (LMCT-ET) between TATB-HOF and Eu 3+ . Eu@TATB-HOF was stable in an aqueous solution and enabled highly sensitive detection of Th 4+ . When Th 4+ concentrations ranged from 2.0 to 37.0 mmol/L, the fluorescence intensity of Eu@TATB-HOF showed a good linear relationship with the concentration of Th 4+ ions, with a detection limit of 1.5 mmol/L. Furthermore, several methods were used to demonstrate that the fluorescence quenching of Eu@TATB-HOF by Th 4+ was mostly mediated by the inner filter effect (IFE). Finally, this probe was successfully used to detect Th 4+ ions in real samples.
研究领域:
材料科学
·
分析化学
·
无机化学
·
环境科学
·
核工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2026
·
IF 3.3
Qing Song,Wanjun Zhang,Qingguo Chen,Rui Ma,Wei Xu,Sultan Mehmood,Liang Bian,Xiaofeng Zhao
Precipitation enrichment coupled with ceramic solidification represents a technically viable and promising engineering approach for volume reduction and immobilization of high-level radioactive waste. Rhabdophane has been proposed as a candidate host phase for immobilizing actinides from high-level liquid waste (HLLW). However, the wet-chemical co-precipitation mechanism governing the simultaneous incorporation of tetravalent actinides and divalent charge-compensating cations remains incompletely understood. This knowledge gap is particularly relevant because Ba 2+ is a major product in HLLW generated from commercial nuclear power reactors. In this study, we investigate the Ba 2+ /Th 4+ co-incorporation behavior and solubility limits in La 1–2 x Th x Ba x PO 4 ·nH 2 O rhabdophane synthesized at pH=1 and 90 °C. Our results suggest that an excess of Ba 2+ is required to stabilize a single-phase rhabdophane, with an optimal Ba:Th ratio of 5. Combined structural, spectroscopic, and microscopic analyses confirm effective substitution of Ba 2+ and Th 4+ at La 3+ lattice sites for x ≤ 0.05. Higher doping levels lead to the crystallization of rhabdophane with nonstoichiometric compositions, accompanied by Ba 2+ vacancy defects. Over 99% of Th 4+ in 0.05 mol/L solution was removed within 12 h. Upon thermal treatment, the as-synthesized rhabdophane powders can be converted into dense monazite ceramics at 1250 °C.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Shulin Zheng,Hongqing Wang,Qinghua Hu,Yuyuan Wang,Jiangke Hu,Fenfen Zhou,Pengying Liu
A fluorescent sensor Hn based on β-diketone derivative for Th 4+ ions was designed and investigated, which showed high selectivity in the present of other metal ions even UO 2 2+ in CH 3 OH:H 2 O (v/v = 2:8, pH = 7.2) solution. Meanwhile, the binding mode of the sensor Hn with Th 4+ ions was found to be 1:1 with association constant of 2.46 × 10 4 M −1 . And there was linear relationship between the fluorescent intensity of Hn -Th 4+ and the concentration of Th 4+ ions covering a range of 0.06 μM–1.0 μM and the detection limit was 0.0344 μM. At the same time, the interaction properties between the sensor Hn and Th 4+ ions and the fluorescent mechanism were investigated by IR, 1 HNMR and DFT. Most importantly, this fluorescent sensor was successfully utilized for the fluorescent imaging of Th 4+ ions in living cells.
研究领域:
分析化学
·
生物无机化学
·
分子影像学
·
环境毒理学
·
细胞生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）