Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 17
·5161-5166
·
IF 7
Huimin Zhao,Qingqing Wang,Shumin Wang,Junyue Yin,Huibin Wang,Wenhao Shao,Zixin Yao,Jianting Yao,Lixin Zang
Precise determination of oxygen concentrations is vital in a wide range of applications. Molecules with balanced phosphorescence and fluorescence can act as ratiometric oxygen sensors, and these single-molecule sensors represent the most accurate approach for oxygen sensing. Harnessing the different degrees of singlet–triplet state mixing induced by different lanthanides, a double-ring porphyrin (sinoporphyrin sodium, DVDMS) was simultaneously coordinated to gadolinium(III) and praseodymium(III) to balance the excited-state populations. The fluorescence and phosphorescence quantum yields for this lanthanide complex (PrGd-DVDMS) were 0.17% and 0.66%, respectively. Thus, the phosphorescence-to-fluorescence intensity ratio of PrGd-DVDMS was only 3 : 1; this compares very favorably with that for DVDMS coordinated to two gadolinium(III) ions (Gd2-DVDMS), which was 30 : 1. Furthermore, PrGd-DVDMS displayed excellent ratiometric oxygen sensing characteristics, and the uncertainty in its phosphorescence-to-fluorescence intensity ratio was considerably lower than that of Gd2-DVDMS. This new mixed-lanthanide porphyrin therefore has excellent potential as an oxygen indicator for applications such as environmental monitoring that require high reliability.
✓ 已验证
产品关联
DOI
高影响因子
Toxics
·
2023
·Vol. 11
·期 8
·680
·
IF 4.6
Kevin Adi Kurnia,Ying-Ting Lin,Ali Farhan,Nemi Malhotra,Cao Thang Luong,Chih-Hsin Hung,Marri Jmelou M. Roldan,Che-Chia Tsao,Tai-Sheng Cheng,Chung-Der Hsiao
In recent years, there have been efforts to utilize surface water as a power source, material, and food. However, these efforts are impeded due to the vast amounts of contaminants and emerging contaminants introduced by anthropogenic activities. Herbicides such as Glyphosate and Glufosinate are commonly known to contaminate surface water through agricultural industries. In contrast, some emerging contaminants, such as rare earth elements, have started to enter the surface water from the production and waste of electronic products. Duckweeds are angiosperms from theLemnaceaefamily and have been used for toxicity tests in aquatic environments, mainly those from the genusLemna, and have been approved by OECD. In this study, we used duckweed from the genusWolffia, which is smaller and considered a good indicator of metal pollutants in the aquatic environment. The growth rate of duckweed is the most common endpoint in observing pollutant toxicity. In order to observe and mark the fronds automatically, we used StarDist, a machine learning-based tool. StarDist is available as a plugin in ImageJ, simplifying and assisting the counting process. Python also helps arrange, manage, and calculate the inhibition percentage after duckweeds are exposed to contaminants. The toxicity test results showed Dysprosium to be the most toxic, with an IC50value of 14.6 ppm, and Samarium as the least toxic, with an IC50value of 279.4 ppm. In summary, we can provide a workflow for automatic frond counting using StarDist integrated with ImageJ and Python to simplify the detection, counting, data management, and calculation process.Keywords:duckweed;StarDist;deep learning;cell counting;image segmentation;rare earth element
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Hanqin Weng,Yi Wang,Fuhai Li,Yusa Muroya,Shinichi Yamashita,Sheng Cheng
Recovery of platinum group metals (PGMs) including palladium (Pd), rhodium (Rh), and ruthenium (Ru) from high-level radioactive liquid waste (HLLW) possesses enormous environmental and economic benefits. A non-contact photoreduction method was herein developed to selectively recover each PGM from HLLW. Soluble Pd(II), Rh(III), and Ru(III) ions were reduced to insoluble zero-valent metals and separated from simulated HLLW containing neodymium (Nd) as a representative for lanthanides , another main component in HLLW. Detailed investigation on the photoreduction of different PGMs revealed that Pd(II) could be reduced under 254- or 300-nm UV exposure using either ethanol or isopropanol as reductants. Only 300-nm UV light enabled the reduction of Rh(III) in the presence of ethanol or isopropanol. Ru(III) was the most difficult to reduce, which was only realized by 300-nm UV illumination in isopropanol solution. The effects of pH was also studied, suggesting that lower pH favored the separation of Rh(III) but hindered the reduction of Pd(II) and Ru(III). A delicate three-step process was accordingly designed to achieve the selective recovery of each PGM from simulated HLLW. Pd(II) was reduced by 254-nm UV light with the help of ethanol in the first step. Then Rh(III) was reduced by 300-UV light in the second step after the pH was adjusted to 0.5 to suppress the Ru(III) reduction. In the third step, Ru(III) was reduced by 300-nm UV light after isopropanol was added and the pH was adjusted to 3.2. The separation ratios of Pd, Rh, and Ru exceeded 99.8%, 99.9%, and 90.0%, respectively. Meanwhile, all Nd(III) still remained in the simulated HLLW. The separation coefficients between Pd/Rh and Rh/Ru exceeded 56,000 and 75,000, respectively. This work may provide an alternative method to recover PGMs from HLLW, which minimize the secondary radioactive wastes compared with other approaches.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Li Ding,Xuepeng Wang,Shanxin Yang,Wenda Xu,Yongde Yan,Yun Xue,Fuqiu Ma
In order to reveal the extraction mechanism of Nd on Ga-Al alloy electrode, the electrode reactions and alloy formation between Nd(III), Ga(III) and Al(III) ions in different molten salt systems were studied by multiple electrochemical methods. The cyclic voltammetry curves measured in melts with different concentrations confirmed that only three intermetallic compounds were formed in both Ga-Nd and Al-Nd systems. The preferential interaction of Nd with Ga in Ga-Al-Nd ternary system was further verified by cyclic voltammetry curves with varying potential window. In particular, the co-reduction process of three ions was gradually determined by the comparison of electrochemical behaviour in different melts. In addition, the interfacial reaction of Nd(III) ion on liquid Ga-Al alloy cathode was investigated, and the corresponding exchange current densities were measured through galvanostatic pulse (0.0049, 0.0047, 0.0056 and 0.0055 A cm −2 ) and Tafel method (0.0029 A cm −2 ).
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 17
·2200930
·
IF 10.05
Fei Xu,Xiang Wang,Yue Li,Beng Jiang,Zuoru Dong,Zichen Yang,Jiaxing Kang,Xin Shu,Zuimin Jiang,Feng Hong,Run Xu,Zhongquan Ma,Teng Chen,Zhan Xu,Haitao Xu
Corrugated 2D antimony-halide perovskites such as Cs 3 Sb 2 Cl 9 (CSC) are promising candidates for single-source white-light emission due to their ultra-broadband spectra. However, CSC has a serious luminescence quenching phenomenon due to inadequate confinement of excitons. By the homovalent substitution of trivalent antimony cation Sb 3+ by a small amount of trivalent rare earth (RE) cations RE 3+ , the photoluminescence intensities from high-quality Cs 3 (Sb 1− x RE x ) 2 Cl 9 (CSRC) (RE = Ce, Sm, Nd, Y, Er, etc.) films at room temperature (RT) are over two orders of magnitude higher than that of CSC film. Especially, the photoluminescence quantum yield (PLQY) for the Cs 3 (Sb 0.995 Er 0.005 ) 2 Cl 9 film is 9.5% at RT, which is much higher than A 3 B 2 X 9 perovskites previously reported for single-source white-light lighting. Furthermore, the Cs 3 (Sb 0.995 Er 0.005 ) 2 Cl 9 film exhibits an ultra-broadband emission with the full width at half maximum reaching 554 meV at RT, resulting in a “warm” white-light with the CIE coordinate (0.33, 0.46) and the correlated color temperature of 5450 K. The PLQY enhancement can be considered as the fact that a high activation energy by bandgap widening effect and Type-I-like “straddling” band alignment between Cs 3 Sb 2 Cl 9 and Cs 3 Er 2 Cl 9 lead to reducing nonradiative losses and increasing radiative recombination channels. Meanwhile, the spectral broadening can be considered to be attributed to strong effect of electron–phonon interaction.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hanyu Xu,Mochen Jia,Zhiying Wang,Yanling Wei,Zuoling Fu
The core–shell engineering of lanthanide-doped nanoparticles has captured considerable attention because it can safeguard the luminescence intensity of the core by reducing surface defects. However, the limited surface area of the traditional spherical core–shell structure hinders the further breakthrough of the brightness. Herein, a unique NaYF4:Yb3+/RE3+@NaYF4:Yb3+/RE3+@NaNdF4:Yb3+ (RE3+ = Ho3+ or Er3+) dumbbell-shaped multilayer nanoparticle featuring a high surface area is reported. Its upconversion luminescence intensity is higher than that of the conventional spherical core–shell structure. A thorough investigation is performed on the luminescence and thermometric mechanisms of Ho3+/Er3+ distributed in the core and the first shell. Remarkably, when Ho3+/Er3+ ions are distributed in the first shell, the relative sensitivity of the biological luminescence nanothermometer composed of downshifting near-infrared emissions is increased to 2.543% K–1 (328 K), which considerably exceeds most reported values. The increased value is attributed to the more thermal-sensitive phonon-assisted energy transfer. For potential biological applications, dumbbell-shaped nanoparticles (DSNPs) with hydrophilic modification show excellent thermometric performance and high tissue penetration depth. Overall, the insights provided by this work will broaden the scope of novel DSNPs in the fields of luminescence and nanothermometry.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jiajia Meng,Yanyan Cui,Yaling Wang
Lanthanide-doped nanoparticles (LDNPs) are widely used in biophotonics due to their narrow emission band, long lifetime and broad-spectrum tunable luminescence properties. Usually, photosensitizers for biotherapeutic applications need to be triggered by visible light, while bioimaging requires near-infrared (NIR) light with better penetration. However, it is still challenging to achieve efficient luminescence emission in the visible to second near-infrared (NIR-II, 1000–1700 nm) range simultaneously for multifunctional nanoparticles excited at a single NIR wavelength. Here, a simple NaYF 4 :Er/Ce@NaYbF 4 :Er@NaYF 4 :Nd core-shell-shell nanoparticle with interfacial energy transfer by the Yb-sensitized shell and partition doping of Er 3+ under 808 nm excitation, which allows the system to achieve visible and NIR-II luminescence emission from different partitions of Er 3+ . When Ce 3+ is introduced into the core, the Er 3+ in the Yb-sensitized shell is responsible for the emission in the visible region, while the core-doped Er 3+ is mainly responsible for the emission at 1550 nm in the NIR-II. In addition, this core-shell-shell nanostructure has a long luminescence emission lifetime in the visible and NIR-II regions, especially the luminescence lifetime of Er 3+ at 1550 nm is extended to 6.4 ms. More importantly, efficient 1 O 2 generation can be achieved by coupling core-shell-shell nanoparticles with photosensitizer. These results will provide previously unattainable opportunities for LDNPs in biotherapeutic and imaging applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2023
·Vol. 99
·期 1
·109-119
·
IF 3.4
Qianmin Cong,Xiaoyu Wang,Chenxu Feng,Zizhan Sun,Chenxi Cai,Chuangang Fan,Lizhai Pei
BACKGROUND Cadmium ions may be discarded to the environment with living organisms from fossil fuel combustion, phosphate fertilizer and battery industries. It is urgent and essential to develop a sensitive and rapid method for monitoring Cd 2+ level in aquatic environments and biological systems. Neodymium vanadate possesses good catalytic performance for the electrocatalysis of heavy metal ions. Single crystalline Nd vanadate nanoribbons were obtained by a facile approach and used as electrode materials for electrochemical detection of Cd 2+ . RESULTS The Nd nanoribbons with tetragonal NdVO 4 phase possess length, width and thickness of longer than 10 μm, 200 nm to 1.5 μm and 50 nm, respectively. Nd vanadate nanoribbons can serve as a good electron transfer interface. An anodic peak is located at +0.56 V at the Nd vanadate nanoribbon-modified electrode in 0.1 mol L −1 KCl electrolyte containing 1 mmol L −1 Cd 2+ by square wave voltammetry technique. The Nd vanadate nanoribbon-modified electrode exhibits a linear range of 0.01–1000 μmol L −1 and a detection limit of 0.29 nmol L −1 , with good stability, reproducibility and selectivity for Cd 2+ detection. CONCLUSION The optimal measurement conditions including the pH value of the KCl solution, deposition time, deposition potential and standing time, which are pH 1, 180 s, −1.0 V and 60 s, respectively. The Nd vanadate nanoribbon-modified electrode shows great application potential for detecting heavy metal ions in liquid environments. © 2023 Society of Chemical Industry.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Hao-Hua Deng,Kai-Yuan Huang,Quan-Hui Fang,Ya-Ping Lv,Shao-Bin He,Hua-Ping Peng,Xing-Hua Xia,Wei Chen
The design and development of colorimetric sensors for recognition of rare-earth Sc 3+ ions are very challenging and most of the reported methods are limited by poor sensitivity and serious interference. Herein, we unveiled a new colorimetric strategy for the sensitive and selective detection of Sc 3+ based on the surface plasmon resonance properties of gold nanoparticles (GNPs). The key aspect of the proposed protocol is the selection of pyridoxal phosphate (PLP), an important biomolecule involved in many biological processes, both as an effective aggregation promoter of GNPs stabilized by cysteamine (Cyst-GNPs) and a strong chelator for the selective complexation of Sc 3+ . PLP can covalently bind to the Cyst-GNPs through the formation of a Schiff base, which neutralizes the positive surface charges, weakens the electrostatic repulsion force among the nanoparticles, thereby triggering the agglomeration of Cyst-GNPs. Owing to the intensive Lewis acid-base interactions, the introduced Sc 3+ ions effectively compete with Cyst-GNPs to bind PLP, and the Cyst-GNPs tend to be dispersed in this case. A linear response from 0.1 to 3 μM is achieved for Sc 3+ , and a detection limit down to 0.02 μM is obtained. Negligible interfere from other ions is observed in this assay under identical experimental conditions.
✓ 已验证
产品关联
DOI
高影响因子
BIOCONJUGATE CHEMISTRY
·
2021
·
IF 4.774
Ruiyi Dai,Xiangrong Peng,Bi Lin,Danyang Xu,Ruichan Lv
In this research, a NIR II luminescence imaging and enhanced chemo-/photothermal therapy system of CuS–DOX–Nd/FA NPs for breast cancer and lymph node tracing under single 808 nm irradiation is proposed. Nd–DTPA molecular cluster with the NIR II imaging effect as the carrier was designed to load the ultrasmall CuS nanoparticles and chemotherapeutic drug doxorubicin hydrochloride (DOX). The composite probe is used for tumor lesion imaging and tracking the breast cancer sentinel lymph nodes with simultaneous chemo-/photothermal therapy (PTT) for breast cancer under the single 808 nm laser. This designed probe not only has high permeability and retention (EPR) targeting effect but also can respond to the tumor microenvironment (TME), realizing more precise and efficient release of DOX at the cancer focus. At the same time, CuS as a drug carrier has a good photothermal therapy effect (photothermal conversion efficiency: 27.9%). The serialized released chemotherapy DOX and synergistic PTT effect can be used to the treat the in situ breast cancer land and simultaneously kill the metastasis cancer. The system made the combined molecular clusters Nd–DTPA achieve NIR II imaging of tumor lesions of breast cancer and lymph node to obtain the integration of diagnosis of the transferred disease for better prognosis. The feasibility of the system had obvious tumor growth inhibition effect with NIR II imaging guided is verified by a series of in vitro and in vivo experiments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Ju Bai,Wei Lai,Lili Gong,Luqi Xiao,Guosheng Wang,Linglong Shan,Shuangjiang Luo
In order to enhance the permeance of the acid resistance membrane, an ionic liquid (IL) regulating strategy was proposed to rearrange the interfacial polymerization process. Herein, we revisited polyethylenimine (PEI) and cyanuric chloride (CC) as the pristine acid-resistant membrane. 1-aminopropyl-3-methylimidazolium chloride ([AEMIm][Cl]) and 1-aminopropyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide ([AEMIm][Tf 2 N]) ILs were used to regulate the interfacial polymerization process. Molecular dynamic (MD) simulation was used to reveal IL and PEI diffusion behavior in aqueous solution, membrane pore size distribution , and porosity. The effects of ILs on membrane surface morphology , surface zeta potential , chemical composition, and separation property were analyzed. The IL regulating strategy endow the membrane with uniform smaller pore and higher porosity, thus improved membrane permeance and selectivity simultaneously. For the [AEMIm][Cl] IL, the corresponding AEMIC-PEI-CC membrane showed high permeance of 79.1 L m −2 h −1 bar −1 , which is 1.36 times the pristine PEI-CC membrane, combined with high Y 3+ rejection of 97.5%, low H + rejection of 1.35%. In addition, this membrane showed good acid stability in 30 days long-term test.
✓ 已验证
产品关联
DOI
高影响因子
Applied Materials Today
·
2019
·
IF 8.013
Kaimin Du,Pengpeng Lei,Lile Dong,Manli Zhang,Xuan Gao,Shuang Yao,Jing Feng,Hongjie Zhang
A novel multifunctional theranostic nanoplatform was fabricated via in situ growth of ultrasmall Ag 2 Se nanodots on the surface of chitosan (CS) coated NaYF 4 :Yb/Er@NaLuF 4 :Nd/Yb@NaLuF 4 upconversion nanoparticles (UCNPs). NaYF 4 :Yb/Er@NaLuF 4 :Nd/Yb@NaLuF 4 @CS@Ag 2 Se (labeled as UCNPs@CS@Ag 2 Se) nanocomposites can provide downshifting (DS) and upconversion (UC) luminescence in NIR biological window I and II under 808-nm continuous-wave laser excitation simultaneously. Meanwhile, the attached Ag 2 Se nanodots could produce hyperthermia and photoacoustic energy upon 808-nm laser irradiation due to its strong near-infrared (NIR) absorbance. Together with the X-ray absorbance feature of lanthanide components, the nanocomposites with excellent luminescent properties, high X-ray attenuation coefficient and strong NIR absorbance could be utilized as a smart contrast agent for upconversion luminescence (UCL)/downshifting luminescence (DSL)/computer tomography (CT)/photoacoustic (PA) multimodal imaging in vitro and in vivo . Furthermore, the as-synthesized nanocomposites possess superior photothermal performance, good biocompatibility, and negligible toxicity, showing great potential as an ideal photothermal therapy (PTT) agent. These outstanding properties revealed that UCNPs@CS@Ag 2 Se nanocomposites are promising theranostic agents for tetra-modal imaging-guided PTT of cancer.
✓ 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）