SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Chen-Yan Hu,Zi-Yi Dong,Zheng-Yu Dong,Yi-Hui Wu,Sheng-Jie Ji,Li-Li Hu,Xin-Yu Yang,Hao Liu,Bin Xu
The present study investigated the mechanism of manganese ion (Mn(II))-activated periodate (PI) for rapid removal of sulfadiazine (SDZ). The Mn(II)/PI system showed excellent SDZ degradation results with 99.8 % degradation efficiency within 2 min at pH = 5.5. Mechanism study reveals that the degradation of SDZ in the Mn(II)/PI system takes place mainly through an electron transfer process. Mn(II) can be oxidized by PI to formed the in-situ MnO 2 , followed by the generation of MnO 2 -PI complex. Electrochemical methods have confirmed that the generated MnO 2 -PI complex significantly contributes to the degradation of pollutants. MnO 2 -PI mediates the transfer of electrons from SDZ to PI surface through surface vacancies, thereby achieving efficient degradation of pollutants. p -methoxyphenyl sulfone (PMSO) is used as a probe compound, and almost 90 % of PMSO is converted into PMSO 2 in the Mn(II)/PI/SDZ system, manifesting that excessive PI may oxidize active Mn(IV) to Mn(V). And the generated Mn(V) also contributes to the SDZ degradation. The SDZ degradation pathway is proposed and the transformation of iodine species is detected. The final iodine species in the system are iodate. The chloride culture experiment has confirmed that the production of organic iodine is very low, indicating no significant health risks. This study reveals mechanism of periodate-based process, providing theoretical and technical implementation guidelines of periodate in water treatment.
研究领域:
环境科学
·
化学工程
·
水处理
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产品关联
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Tao Huang,Hui Peng,Qilin Wei,Chengyu Peng,Ye Tian,Shangfei Yao,Xinxin Han,Bingsuo Zou
If we introduce transition metal ions with spins into an organic-inorganic halide perovskite compounds, interesting spin dependent optical properties may be seen in this system. This paper reports an organic-inorganic hybrid manganese ion doped lead halide crystal incorporated by TDMP (trans-2,5-dimethylpiperazinium), it gives not only the STE1 (polaronic exciton), usually brought up by the enhanced electron-phonon coupling in the amine incorporated compound, but also give a novel bipolaronic exciton (STE2) for the paired charge state formation due to the incorporation of bi-amine cationic molecules, a excitation by the polaronic molecule due to enhanced electron-phonon coupling and neighboring correlation out of the Mn ion ferromagnetic spin coupling in the lattice at slightly high doping. Such magnetic bipolaron state could often be accompanied by several multiphonon Raman modes and ferromagnetism. It is even interesting that this state can give super-high red emission with PLQY at ~92.5% at room temperature. Moreover, the emission color and intensity could also be modulated by the Mn doping concentration, temperature, and laser excitation power. The low doping products can give green emission out of single Mn d-d transition at very low temperature or high laser excitation power. The intermediately doped products can give white emission out of STE1 and STE2. The highly doping products give red emission out of STE2 (bipolaron states) at room temperature or low laser power. These interesting phenomena reflected the microscopic interactions between spins, carriers and phonons in the products, which can be found applications in the future fields of photonics and spintronics.
研究领域:
材料科学
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光电
·
自旋电子学
·
光子学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·
IF 0.847
Hui-Chao GUAN,Xiao-Tong SONG,Gui-Bao LIU,Shu-Mei YUE
Complexes [Zn(pbm)(5-hip)3] ( 1 ), [Zn(pbm)(5-nip) 3 ] ( 2 ), [Mn(pbm)(H 3 btc) 2 (H 2 O)] ( 3 ) and [Mn(pbm)(5-nip) 3 ] ( 4 ), where H 2 HIPA = 5-hydroxyisophthalic acid, H 2 nip = 5-nitroisophthalic acid, H 3 btc = trimesic acid and pbm (pyridine benzene chelate material) = 2-(2-pyridyl)benzimidazole, were identified via single-crystal XRD analyses. 1, 2 and 4 pertain to the monoclinic space group C 2/ c , while 3 belongs to the triclinic space group P ① . The interplay of CT-DNA with those complexes was delineated using ultraviolet, fluorescence, and circular dichroism (CD) spectroscopy and viscosity measurements. Complexes 1, 2, 3 and 4 interact with CT-DNA in an electrostatic or grooving mode. We wish to offer a theory-wise foundation for developing anti-tumor medicines.
研究领域:
无机化学
·
生物化学
·
药学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Haishuo Wang,Xinke Tian,Zhichun Li,Jie Zhang,Shiyin Li,Heyong Huang
Lake eutrophication leads to the excessive proliferation of cyanobacteria in aquatic environments, resulting in microcystin-LR (MCLR) concentrations exceeding regulatory limits. The associated environmental risks and health concerns attract widespread attention. As one of the most active chemical substances in aquatic environments, dissolved organic matter (DOM) plays a critical role in the phototransformation of MCLR. In environments where Fe(II) and Mn(II) coexist, the phototransformation process of MCLR may be influenced. Among fulvic acid (FA), humic acid (HA), cyanobacteria-derived DOM (CDOM), and reed leaf-derived DOM (RDOM), FA has the highest apparent reaction rate constant for MCLR at 0.03567 h -1 . Using isopropanol, furfuryl alcohol, and sorbic acid as quenchers, the contributions of different photochemically produced reactive intermediates(PPRIs) to MCLR photodegradation follow the order: 3 DOM⁎ > ·OH > 1 O 2 . As pH increases, changes in the conformation and charge distribution of DOM and MCLR suppress MCLR photodegradation. The addition of Fe(II) or Mn(II) enhances the photodegradation of MCLR by DOM. Electron paramagnetic resonance tests and radical quenching experiments indicate that the introduction of Fe(II)/Mn(II) increases ·OH production. The enhanced ·OH promotes MCLR photodegradation more effectively than the suppression caused by Fe(II)/Mn(II) quenching of ³DOM⁎. Product analysis reveals that demethylation, hydroxylation, decarbonylation, decarboxylation, denitration, and bond cleavage are the main pathways of MCLR photodegradation. These findings provide valuable insights into the migration and transformation of MCLR in complex environments, contributing to a deeper understanding of the fate of pollutants in natural water systems, particularly in the presence of metal ions.
研究领域:
环境科学
·
水生生态学
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 29
·7047-7055
·
IF 4.3
Gao Lifang,Chen Rong,Li Haixia,Xu Dan,Zheng Danning
A novel time-resolved fluorescence nanoprobe (PBMO, PLNR-BSA-Mn 2+ -OPD) is fabricated for the label-free determination of acetylcholinesterase (AChE). The ZnGeO:Mn persistent luminescence nanorod (PLNR) and Mn(II) are, respectively, exploited as the signal molecule and quencher to construct the PBMO nanopobe using bovine serum albumin (BSA) as the surface-modified shell and o -phenylenediamine (OPD) as the reducing agent. In the presence of H 2 O 2 , the persistent luminescence of PBMO at 530 nm is enhanced remarkably within 30 s due to the oxidation of Mn(II). H 2 O 2 can react with thiocholine (TCh), which is produced through the enzymatic degradation of acetylcholine (ATCh) by AChE. The PBMO nanoprobe is successfully applied to the determination of AChE in the linear range of 0.08–10 U L −1 , with a detection limit of 0.03 U L −1 (3 σ / s ). The practicability of this PBMO nanoprobe is confirmed by accurately monitoring AChE contents in human serum samples, giving rise to satisfactory spiking recoveries of 96.2–103.6%. Graphical Abstract
研究领域:
生物化学
·
分析化学
·
医学诊断
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Tingting Ye,Yunluo Wang,Shihao Ge,Tianrui Zhou,Jianghua Wu,Zesen Gao,Ruifeng Liu,Zesheng Pan,Meiling Zhu,Jingshan Hou,Minghui Wang,Lianjun Wang,Haijie Chen,Wan Jiang
The metal halides have superior optoelectronic properties because of their special electronic structures, such as the ns2 metal halides (Pb2+, Sb3+, Sn2+, etc.) and dx metal halides (Zn2+, Cd2+, Mn2+, etc.). The Mg halides, which have unfriendly electronic structures with high excited state energy levels, conflicts with the basic requests of luminescent metal halides. Here we found efficient luminescent properties for the Mg halides. A series of Mg halides have been synthesized and studied. Under ultraviolet (UV) excitation, Li2MgCl4 and RbMgCl3 exhibit violet light emissions at 350 nm and 430 nm, CsMgCl3 and Cs2MgCl4 exhibit blue light emissions at 465 nm and 480 nm. CsMgCl3, RbMgCl3, and Li2MgCl4 show high thermal stability due to the strong rigidity of the crystal structures. With the doping of Mn(II) ions into the Mg sites, their emission colors could be further tuned. Based on the unique photoluminescence of the Mg halides, we have successfully applied the as-synthesized materials into green lighting and anti-counterfeiting devices. Our study shows that Mg halides are also a family worthy studying, shedding light on the exploration of metal halides as efficient optoelectronic semiconductors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Wei Sun,Xue-Lu Hao,Wen-Qian Zhang,Zhen-Nan Li,Dong-Fang Zhang,Li Xu,Yi-Fan Kang
N -Oxide-functional isonicotinic acid N -Oxide (HINO) ligand has been selected to construct functional metal–organic frameworks (MOFs). And based on HINO ligand and Mn(Ⅱ) center, a novel N -Oxide-functional three-dimensional (3D) pillared microporous Mn(Ⅱ)-MOF, [Mn(INO) 2 ·CH 3 OH] n ( 1 ), has been constructed. MOF 1 has been characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), thermogravimetric analyses (TGA), elemental analyses (EA) and infrared spectroscopy (IR). Structural analysis reveal that in MOF 1 , the N -Oxide group and carboxylic group of INO ligand connect Mn(Ⅱ) centers to form a one-dimensional (1D) Mn-O chain, and then the 1D chains are supported by INO ligands with two types of coordination modes to generate its 3D pillared microporous framework. Given the 1D Mn-O chains in MOF 1 , magnetic susceptibility measurements have been conducted, which show antiferromagnetic exchange interactions between Mn(Ⅱ) centers in the Mn-O chain. Given the porosity of MOF 1 and the N -Oxide sites and vacant carboxylic O sites on its pore surfaces, gas adsorption experiments of MOF 1 have been investigated by N 2 , CH 4 and CO 2 gases. MOF 1 displays good adsorption capacity, affinity and selectivity of CO 2 over CH 4 and N 2 , indicating its potential application in postcombustion CO 2 capture and gas separation.
研究领域:
材料科学
·
化学
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Jianping Zhao,Fei Qian,Wenping Guo,Jianfeng Li,Zeyuan Lin
Three different manganese(II) porphyrins have been exploited to react with 4-methylimidazolate (4-MeIm–), and the five-coordinate products are characterized by ultraviolet–visible, single-crystal X-ray, and electronic paramagnetic resonance spectroscopies. Interestingly, 4-MeIm– is found to bond to the metal center through either of the two N atoms (N1 or N3), which yielded two linkage isomers with either an unhindered or a hindered ligand conformation, respectively. Investigations revealed it is the large metal out-of-plane displacements (Δ24 and Δ4 ≥ 0.59 Å) that have rendered the equivalence of two isomers with a small energy difference (5.2–8.3 kJ/mol). The nonbonded intra- and intermolecular interactions thus become crucial factors in the balance of linkage isomerization. All of the products in both solution and solid states show the same characteristic resonances of high-spin Mn(II) (S = 5/2) with g⊥ ≈ 5.9 and g∥ ≈ 2.0 at 4 K, consistent with the weak effects of the axial ligand on core conformation and metal electronic configurations. Zero-field splitting parameters obtained through simulations are also reported.
研究领域:
配位化学
·
材料科学
·
物理化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Ronghua Ma,Xiaoyan Wei,Chunfeng Wang,Shaohui Mao,Bing Chen,Yonghong Shao,Yu Fu,Keyu Yan,Dengfeng Peng
Mechanoluminescenece (ML) is a dynamic luminescence phenomenon of materials under various mechanical stimulation. Impurity doped ZnS shows high ML repeatability without any needs for extra excitation sources, thus making it very promising in applications like stress sensing and battery-free new light source . Lots of progress has been made in the last decades, however, the reproducible ML (RML) mechanism is still unclear to explain some basic phenomena like how the electron is excited to conduction band when undergoing mechanical actions or how the excitation energy is transferred to the dopants so efficiently. Based on comparative study of photoluminescence (PL) and ML in Mn 2+ doped ZnS prepared via melt-salt method, the RML energy routes in sphalerite ZnS: Mn 2+ is proposed herein, and further, a general mechanism is supposed which could apply to other RML systems. The excitation of RML is possibly generated by electron transfer during bond rebuilding in plastic deformation while the highly efficient energy transfer is realized through hole and electron capture by the dopant. According to this mechanism, we provide some prospects for further optimization of RML performance as well as discovery of new RML materials.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Huilin Chen,Chenliang Li,Qian Zhu,Yuzhen Wang,Zhiguo Xia
Sensing temperature using fluorescent materials by monitoring alterations in temperature-dependent luminescence characteristics is of great importance for various application fields, including modern industry, scientific research, and daily life. However, there are two main concerns on optical thermometry, and one is the low sensitivity, particularly at elevated temperatures, failing to meet precise measurement demands; another issue is how we can apply the thermometry in in situ environments. Herein, we design and report a hybrid manganese-based halide thermometry exhibiting a relative sensitivity (S r ) of 26.368% K − 1 at 463 K. We further propose a facile synthesis method for photopolymerizable hydrogel films containing the crystallized manganese-based halide thermometry, maintaining the same luminescence and sensing property. The luminescent gel film is applied to chip-based temperature sensing, demonstrating highly accurate performances as smart sensors and flexible electronic materials. This work opens up a new route to design luminescent metal halide thermometry to enrich the library of temperature sensing. Moreover, the luminescent gel film as optical thermometry can be applied in situ from micro-electronics to large-scale industrial systems, supplying new possibilities for advanced sensing and spectroscopy studies.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 11
·期 4
·1251-1257
·
IF 8.067
Zi-Lin He,Jun-Hua Wei,Jian-Bin Luo,Zhi-Zhong Zhang,Dai-Bin Kuang
The flexibility afforded by their modular structure confers fruitful unique properties to organic–inorganic hybrid metal halides (OIMHs). Typically, stimuli-responsive materials have wide applications in thermal imaging, thermometry, and anti-counterfeiting. Herein, the Mn(II)-based OIMHs (TMS)2MnBr4 (TMS = trimethylsulfonium) were prepared through a facile dry ball-milled method. The obtained ball-milled powders show an intriguing phase transition along with emission switching. Importantly, photoluminescence (PL) switching can be realized by simply laying hands on the (TMS)2MnBr4 powders, highlighting their promising application potential in portable thermosensitive devices.
研究领域:
材料科学
·
无机化学
·
光电功能材料
·
智能响应材料
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DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2022
·Vol. 17
·期 2
·1-11
·
IF 6.048
Yang Fan,Li Junpeng,Wang Huan,Xiao Xiaofeng,Bai Rui,Zhao Feng
Manganese oxides are widely distributed in soils and sediments, affecting the migration and transformation of heavy metals and organic pollutants. The microbial conversion of soluble Mn(II) into insoluble Mn(III/IV) oxides is considered to be the initial source of manganese oxides in the environment; however, whether this process is related to a physiological role remains unclear. Here, we explored the microbial manganese oxidation process under visible light by using coastal surface seawater microorganisms. Visible light greatly promotes the oxidation rate of Mn(II), and the average rate reaches 64 µmol/(L·d). The generated manganese oxides were then conducive to Mn(II) oxidation, thus the rapid manganese oxidation was the result of the combined action of biotic and abiotic, and biological function accounts for 88 % ± 4 %. Extracellular superoxide produced by microorganisms induced by visible light is the decisive factor for the rapid manganese oxidation in our study. But the production of these superoxides does not require the presence of Mn(II) ions, the Mn(II) oxidation process was more like an unintentional side reaction, which did not affect the growth of microorganisms. More than 70 % of heterotrophic microorganisms in nature are capable of producing superoxide, based on the oxidizing properties of free radicals, all these bacteria can participate in the geochemical cycle of manganese. What’s more, the superoxide oxidation pathway might be a significant natural source of manganese oxide.
研究领域:
环境微生物学
·
地球化学
·
水文学与水资源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）