CRYSTENGCOMM
·
2022
·Vol. 24
·期 14
·2542-2550
·
IF 3.756
Ming-Yang Cao,Chun-Li Hu,Peng-Fei Chen,Qian Wang,Bing-Xuan Li,Yuan Lin,Jiang-Gao Mao
Three nonlinear optical materials Cd4REO(BO3)3 (RE = Sm, Eu, Tb) have been synthesized through high-temperature solid-state reactions. In their crystal structures, Cd(1)O8 and Cd(2)O6 polyhedra are interconnected via sharing edges and corners into a 3D anion framework with two types of tunnels based on 4- and 7-membered rings; the BO3 groups are grafted into the above-mentioned types, creating new tunnels based on Cd4B3 seven-membered rings, which are filled by RE3+ cations. Powder SHG measurements revealed that the Cd4REO(BO3)3 (RE = Sm, Eu, Tb) samples display SHG signals that are approximately 1.2, 5.6 and 1.5 times that of the KDP sample. In addition, Cd4EuO(BO3)3 and Cd4TbO(BO3)3 emit red and green light, respectively. The lifetime of the Eu(5D0) state for λex,em = 464, 610 nm in Cd4EuO(BO3)3 is measured to be about 1.43 ms whereas the lifetime of the Tb(5D4) state for λex,em = 376, 543 nm in Cd4TbO(BO3)3 is measured to be about 1.01 ms.
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JOURNAL OF CHEMICAL SCIENCES
·
2022
·Vol. 134
·期 3
·1-11
·
IF 2.15
LIU XIAOJUAN,LI MINGMING,YANG SHUMING,YANG YAYA,NIE JIANG,XUE YUBING,OUYANG YINGGEN,XIAO SONGTAO
The increasing demand for neodymium (III) and samarium (III) due to their extensive high-tech applications has drawn much attention to their recovery. In this work, the copper-based metal-organic framework HKUST-1 was prepared and used for the adsorption of neodymium (III) and samarium (III) in the media of an aqueous solution. The maximum adsorption capacity of the material for neodymium (III) and samarium (III) was 284.11 and 503.45 mg g −1 at a pH of 5.5, respectively. The adsorption removal rate could achieve nearly 100% at the solid-to-liquid ratio of 1.0 g L −1 , which is relatively excellent among such adsorbents used for rare earth elements uptake. The mechanism and reversibility of neodymium (III) and samarium (III) adsorption were systematically investigated by X-ray diffraction, Fourier transforms infrared spectroscopy, Raman spectra, and X-ray photoelectron spectroscopy, suggesting that the mechanism for the adsorption was ion exchange and complexation between trivalent rare-earth ions and the oxygen atom in the hydroxyl group. The reason behind the material displaying a more robust affinity for samarium (III) may be caused by the energy difference between f n and f n+1 states of samarium (III) was larger than that of neodymium (III), thus forming stronger covalent bonding. Graphical abstract HKUST-1 exhibited high adsorption capacity towards Nd (III) and Sm (III). The reason behind the material displaying a more robust affinity for Sm(III) was caused by that the energy difference between f n and f n+1 states of Sm(III) was larger than that of Nd(III), thus forming stronger covalent bonding.
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OPTICAL MATERIALS
·
2021
·
IF 3.08
Panpan Du,Qi Zhu,Xiaodong Li,Xudong Sun,Byung-Nam Kim,Ji-Guang Li
A series of garnet-type Li 6 CaLa 2(1- x ) Nb 2 O 12 : x RE phosphors (LCLN: x RE, RE = Pr, Sm, Tb and Dy) were prepared via sol-gel processing and subsequent calcination for the first time, with the course of phase evolution and the characteristics of the LCLN host and RE 3+ luminescence being investigated in detail. It was found that ∼900–1000 °C is a suitable temperature for precursor calcination to produce the garnet phase and LCLN has a relatively low phonon energy (∼725 cm −1 ) and a relatively wide bandgap (∼4.53 eV) for luminescence. The LCLN:0.012Pr, LCLN:0.04Sm, LCLN:0.06 Tb and LCLN:0.06Dy typical phosphors were analyzed to have dominant excitation/emission bands at ∼278/489, 265/614, 268/549 and 264/581 nm, emission colors of white, orange, green and yellowish white, and fluorescence lifetimes of ∼0.43, 0.74, 0.90 and 0.44 ms, respectively. Temperature-dependent photoluminescence found that the four phosphors maintained ∼28, 37, 45 and 56% of their room-temperature intensities at 423 K, with activation energies for thermal quenching of ∼0.37, 0.29, 0.34 and 0.25 eV, respectively. The results demonstrated that the Li-stuffed LCLN garnet could be a suitable host for UV excitable multicolor phosphors.
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JOURNAL OF COORDINATION CHEMISTRY
·
2021
·
IF 1.751
Jia-Qi Li,He Wang,Chun Li,Fan-Ming Zeng,Chuan-Bi Li,Zhong-Min Su
A new Sm(III) coordination complex, [Sm(DHTA)4(H2O)3]n, was synthesized with 2,5-dihydroxyterephthalic acid (H2DHTA) as ligand. The crystal structure and properties were characterized by single crystal X-ray diffraction, IR, elemental analysis and TGA analysis. The single-crystal X-ray diffraction analysis showed that Sm(III) ion is nine-coordinate with six oxygen atoms of four DHTA ligands and three oxygen atoms of three H2O molecules, forming a tri-capped trigonal-prism configuration. The adjacent units of the complex are extended into a 3 D supramolecular network. In the IR spectrum of the complex, there are asymmetric and symmetric stretching vibrations of C = O of the carboxyl group. The complex has two weight loss steps in the TG plot. The complex’s UV-Vis absorptions at 400 and 261 nm are attributed to the DHTA. Furthermore, there is a fluorescent maximum emission at 476 nm, which is derived from the ligand. The fluorescence is attributed to the ligand-ligand charge transfer of the complex.
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JOURNAL OF MOLECULAR STRUCTURE
·
2023
·
IF 3.8
Shuo Shan,Jie Li,Xuan Zhao,Siwen Pi
M-type barium ferrite with the formula Ba 1− x Sm x Fe 12− y Nb y O 19 ( x = 0.00–0.10, y = 0.00–0.20), which was co-doped with Sm 3+ and Nb 5+ ions, was synthesized experimentally by a modified solid-phase reaction method. The crystal structure of samples was determined by X-ray diffraction, which confirmed that they were of high purity. The X-ray diffraction data were fitted with a full-spectrum correction using GSAS software. By Fourier transform infrared spectroscopy, the samples were observed to exhibit bands due to tetrahedral and octahedral sites at 598 cm −1 and 445 cm −1 , respectively. The samples were examined by field emission scanning electron microscopy, which showed that they partly comprised hexagonal structures but mostly consisted of irregular structures with rounded edges. Characterization of the elemental contents of the samples by energy-dispersive spectroscopy revealed an increase in the contents of Sm and Nb and a decrease in the contents of Ba and Fe. The magnetic properties of the samples were examined using a vibrating sample magnetometer. The results showed that the saturation magnetization and residual magnetization of the samples decreased slightly with an increase in the contents of the dopants. The coercivity reached its maximum value, namely, 3367.53 Oe, when x = 0.04 and y = 0.08.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yuanhao Luo,Ling Lin,Pingya Luo,Yongjun Guo,Shuixiang Xie,Meirong Wang,Guixia Xiong,Han Gu
High temperatures degrade drilling fluid performance and endanger drilling safety when drilling deep and ultra-deep wells. The development of a new high-temperature drilling fluid additive to maintain drilling fluid performance in high-temperature environments is critical. A polymer nanocomposite (ADA@SM) was synthesized from the monomers styrene (St), methyl methacrylate (MMA), acrylamide (AM), 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), and diallyldimethylammonium chloride (DMDAAC) through a free-radical copolymerization reaction. Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance ( 1 H NMR) were used to characterize the structure of ADA@SM, and transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to characterize the microstructure of ADA@SM, indicating that it had a "star-net" structure. TGA analysis showed that the thermal decomposition temperature of ADA@SM was above 274 °C. The rheological and filtration properties of drilling fluids with ADA@SM were studied before and after aging at high temperatures (150–240 °C). The rheological model of the drilling fluid containing 2.5 wt% ADA@SM was found to be consistent with the Herschel-Buckley model. After aging at 220 °C, the filtration loss for API and HTHP was 8.4 mL and 29.8 mL, respectively. Using particle size analysis and zeta potential analysis, ADA@SM produced a drilling fluid with good particle size distribution and colloidal stability in high temperature environments . SEM analysis showed that ADA@SM adsorbed on the surface of the bentonite particles, which improved the compactness of the filter cake. The relative molecular weight (Mn) of ADA@SM decreased from 59671 to 5908 after degradation at high temperatures, and ADA@SM released polymer nanospheres , which effectively reduced the filtration loss of the drilling fluid.
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RAPID COMMUNICATIONS IN MASS SPECTROMETRY
·
2025
·Vol. 39
·期 9
·e10005
·
IF 1.7
Zhihong Yan,Jing Ning,Zhen Luo,Dongfang Li,Huiyu Wang,Xiaoyu Xie
Rationale Gentiana urnula Harry Sm is a frequently utilized traditional Chinese medicine (TCM) with applications in the treatment of a range of ailments including jaundice, gastrointestinal ulcers, and influenza. Despite its widespread uses, there is a lack of comprehensive researches on the chemical composition. Methods This study integrated SIRIUS, quantitative structure-retention relationship (QSRR), and liquid chromatography high-resolution mass spectrometry (LC-HRMS) to identify the compounds in Gentiana urnula Harry Sm. Results A total of 213 compounds were identified with high confidence based on retention time (t R ), MS 1 , and MS/MS. Among the 213 compounds, 26 compounds were positively identified firstly in Gentiana urnula Harry Sm. More than 5000 compounds were classified based on MS/MS. Spatial distribution revealed the similarities in compound between roots and stems, while differences were observed between leaves and flowers. Conclusions This study lays the foundation for further investigations into the biological activity and pharmacological mechanism of Gentiana urnula Harry Sm.
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PubMed
高影响因子
Journal of Materials Chemistry B
·
2013
·Vol. 1
·期 10
·1491-1500
·
IF 0
Zhi-Gang Wang,Gong Cheng,Yan-Lin Liu,Ji-Lin Zhang,De-Hui Sun,Jia-Zuan Ni
The multifunctional microspheres consisting of the magnetic γ-Fe2O3 core and the affinity REVO4 (RE = Sm, Dy, Ho) shell have been synthesized via the homogenous precipitation–calcination–ion exchange three-step synthetic route. Their morphologies, structures, surface properties, and magnetisms were characterized, respectively. SEM and TEM images indicate that they all have an average size of about 400 nm and very rough surfaces. The TEM images further reveal that the γ-Fe2O3@REVO4 microspheres are all core–shell structures and the REVO4 shells are about 55–60 nm in thickness. The XRD pattern analyses show that the magnetic γ-Fe2O3 cores belong to cubic structure and the REVO4 (RE = Sm, Dy, Ho) shells are composed of their corresponding tetragonal major phases. HRTEM images, FTIR spectra and EDS further demonstrate the formations of tetragonal REVO4 shells based on checkup of the corresponding lattice fringes, characteristic IR absorption peaks and element signals. Their potentials for selective capture, rapid separation, and convenient mass spectra (MS) labeling of the phosphopeptides from complex proteolytic digests are explored and evaluated for the first time. The experimental results show that the magnetic γ-Fe2O3@REVO4 core–shell structured microspheres have high selective affinity for the phosphopeptides. The trapped phosphopeptides can be rapidly isolated by an external magnetic field, and can be easily identified by characteristic MS signals from 80 Da mass losses in the mass spectra (MS). Additionally, the γ-Fe2O3@REVO4 affinity materials can be reused after recovery.
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PubMed
RSC Advances
·
2013
·Vol. 3
·期 48
·26367-26375
·
IF 2.562
Lining Sun,Yannan Qiu,Tao Liu,Hongshang Peng,Wei Deng,Zhijuan Wang,Liyi Shi
The homogeneously transparent hybrid gels (Ln–N–P-gel, Ln = Sm, Yb, Nd, Er, Pr, Ho, Tm) containing lanthanide complexes (by using dinaphthoylmethane (dnm) as the primary ligand and 1,10-phenanthroline (phen) as the synergic ligand) via the in situ approach have been prepared. The dnm ligand was synthesized and adopted with the aim to sensitize the lanthanide ions with visible light. The properties of Ln–N–P-gels were investigated by Fourier-transform infrared (FT-IR), diffuse reflectance (DR), scanning electron micrographs (SEM), fluorescence spectra and thermogravimetric analyses. The results reveal that the lanthanide complexes are successfully in situ synthesized in the corresponding Ln–N–P-gels. Under the excitation of visible-light, the Ln–N–P-gels showed the respective visible (Sm3+) and near-infrared (Sm3+, Yb3+, Nd3+, Er3+, Pr3+, Ho3+, Tm3+) luminescence. The near-infrared (NIR) luminescence of Sm3+, Pr3+, Ho3+, and Tm3+ complexes sensitized by visible-light had been rarely reported previously, which is highly desired for biomedical and photonics applications. Based on the relevant energy levels, a model was proposed to explain the visible-NIR luminescence of the Ln–N–P-gels based on the visible-light excitation.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Kaixuan Shao,Shicong Pei,Zhuqing Li,Xiaojun She,Yuqing Yang,Hongrui Hu,Mingdi Yang,Kehua Zhang,Hang Li,Ping Wang,Yunsheng Ding,Xianhai Hu
Polymeric rare earth complexes have attracted much attention due to their unique luminescence properties and application prospects. However, as an important component of polymeric rare earth complexes, Sm (III) complexes are rarely reported due to the lack of organic ligands matching the energy of Sm (III). Herein, A novel Sm(III) complexes (Sm(MPon) 3 APhen) emitting red fluorescence is synthesized by using Sm(III) as the central ion and 1-(4- tert -butylphenyl)-3-(4-methoxyphenyl)-1,3-propanone (MPon) and 5-amino-1,10-phenanroline (APhen) as ligands, respectively. Then, A novel waterborne polyurethane-based complex [Sm(MP) 3 AP] x -WPU with orange-red fluorescence is prepared by modified acetone method using Sm(MPon) 3 APhen as the end-blocking agent. Compared with Sm(MPon) 3 APhen, the fluorescence emission peak of [Sm(MP) 3 AP] x -WPU is blue-shifted, and the fluorescence intensity is significantly enhanced with the increase of the amount of Sm(MPon) 3 APhen. Notably, the strongest fluorescence emission peak of [Sm(MP) 3 AP] x -WPU is located in the red light band with the highest photosynthetic absorption efficiency of plants, which could significantly improve the light environment for plant growth and promote plant growth. More importantly, [Sm(MP) 3 AP] x -WPU is water as a dispersed phase, which is particularly safe and environmentally friendly during storage, transportation and use.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 6
·1547-1552
·
IF 2.726
Jin Huan,Xu Ding,Tian Chao,Yue Yinghong,Hua Weiming,Gao Zi
A series of Sm-doped CeO 2 /Beta composite catalysts with various Sm/Ce atomic ratios(0.1–0.4) were prepared by an incipient impregnation method, followed by calcination at 650 °C. They were characterized by X-ray diffraction(XRD), N 2 adsorption, X-ray photoelectron spectroscopy(XPS), Raman, NH 3 -temperature programmed desorption(TPD) and CO 2 -TPD. The incorporation of Sm into CeO 2 /Beta increases obviously the propylene yield for the selective conversion of ethanol to propylene. The promoting effect of Sm on CeO 2 /Beta can be attributed to two reasons. One is more acetone intermediates are generated on the Sm-doped catalysts due to the enhanced formation of oxygen vacancies. The other is the conversion of acetone intermediate to propylene is enhanced owing to weaker and fewer acid sites on the Sm-doped catalysts.
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CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Ting Wang,X.-L. Wang,S.-H. Song,Qing Ma
Multiferroic Nd/Sm-doped BiFeO 3 ceramics synthesized at 700 °C by spark plasma sintering in conjunction with sol-gel precursor powders are investigated by X-ray diffraction, scanning electron microscopy, dielectric , ferroelectric and magnetic measurements. With the doping content of Nd/Sm beyond 10 mol%, the crystal structure changes from R 3 c to coexistence of Pbam and R 3 c . It is also revealed that the grain size for all samples greatly decreases and the dielectric, ferroelectric and magnetic properties are obviously improved with Nd/Sm doping. The optimized remanent polarization are about 1.451 μC/cm 2 and 3.448 μC/cm 2 for the 10 mol% Nd-doped and 15 mol% Sm-doped BiFeO 3 ceramics, respectively. Because of the reduced concentration of oxygen vacancies , the leakage current density of Nd/Sm-doped ceramics decreases more than two orders of magnitude compared to the pure BiFeO 3 sample. The maximum remanent magnetization for the Sm-doped ceramics is approximately 0.279 emu/g, which is higher than that for the Nd-doped samples (0.263 emu/g).
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危险品化学品经营许可证（带存储）