Journal of Physical Chemistry Letters
·
2023
·
IF 5.7
Yacong Li,Chuying Wang,Guangyong Xu,Guigen Luo,Zhengtao Deng
The absorption and photoluminescence (PL) of CsMnBr3 with Mn(II) in octahedral crystal fields are extremely weak due to a d–d forbidden transition. Herein, we introduce a facile and general synthetic procedure that can prepare undoped and heterometallic doped CsMnBr3 NCs at room temperature. Importantly, both PL and absorption of CsMnBr3 NCs were significantly improved after doping a small amount of Pb2+ (4.9%). The absolute photoluminescence quantum yield (PL QY) of Pb-doped CsMnBr3 NCs is up to 41.5%, 11-fold higher than undoped CsMnBr3 NCs (3.7%). The PL enhancement is attributed to the synergistic effects between [MnBr6]4– units and [PbBr6]4– units. Furthermore, we verified the similar synergistic effects between [MnBr6]4– units and [SbBr6]4– units in Sb-doped CsMnBr3 NCs. Our results highlight the potential of tailoring luminescence properties of manganese halides through heterometallic doping.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
无机化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2026
·
IF 4.7
Aibo Li,Chen Zhang,Fangyu Jin,Yanqing Ye,Zhengliang Wang,Peng Ren,Qin Wang,Qiang Zhou
Herein, we obtained a zero-dimensional organic-inorganic hybrid halide of C 7 H 18 N 2 MnBr 4 , whose crystal structure has been confirmed by the single-crystal X-ray diffraction. The single-crystal shows intense green emission with a high internal quantum efficiency of 85.0% and an external quantum efficiency 42.1%. Meanwhile, it also exhibits good thermal stability at elevated temperatures. Taking advantage of its efficient blue light absorption and emission, we fabricated two white light-emitting diodes by combining it with commercial K 2 SiF 6 :Mn 4+ or SrAlSiN 3 :Eu 2+ to investigate its potential in backlighting and lighting application. The former with K 2 SiF 6 :Mn 4+ achieves a wide color gamut of 95.8% of National Television System Committee standard. The latter reaches a high color rendering index of 94.2 and a low correlated color temperature of 3562 K. The fabricated C 7 H 18 N 2 MnBr 4 @polydimethylsiloxane flexible transparent scintillation screen further proves its good X-ray scintillation performance with a detection limit of 19.27 μGy/s and a light yield of 14,670 photons/MeV. This work provides convincing experimental evidence for the multifunctional application of organic-inorganic hybrid Mn(II) halides.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·Vol. 36
·期 80
·e78146
·
IF 19.9
Kai Liu,Lingzhi Gao,Yihan Liu,Zhichao Zhang,Yingjie Mao,Xing Gao,Denghui Xu,Jun Zhou
Low-dimensional Mn-based organic-inorganic metal halides (OIMHs) have attracted considerable interest for optoelectronic applications owing to their unique d–d electronic transitions, environmental friendliness, and structural tunability. Nevertheless, achieving simultaneous control over emission color and intensity within a single precursor system remains challenging. Herein, we propose a dual-dimensional compositional engineering strategy based on the same precursor (C 6 H 14 ClN) to synergistically tune the luminescence properties of Mn-based OIMHs via a combined computational-experimental approach. By simply varying the molar ratio of the organic amine salt to MnCl 2 and further adding raw materials to the as-obtained products, we achieve reversible switching between (C 6 H 14 N)MnCl 3 and (C 6 H 14 N) 3 MnCl 5 , accompanied by a transition in dimensionality from 1D) to 0D), a change in Mn 2+ coordination number from 5 to 4, and a corresponding emission color shift from red to green. Moreover, substituting Cl − with Br − optimizes the Mn···Mn distance, reducing energy transfer between Mn 2+ ions. This effect effectively suppresses non-radiative recombination induced by the heavy-atom effect, thereby significantly enhancing the green emission intensity of (C 6 H 14 N) 3 MnBr 5 . This work not only elucidates the composition-structure-luminescence relationship in low-dimensional Mn(II)-based OIMHs, but also provides clear compositional engineering guidelines for designing next-generation high-performance and emission color-tunable metal halides.
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高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Qing-Ling Cao,Wen-He Zhong,Jie-Yu Zhu,Cai-Hong Shi,Jia-Jia Zhao,Li-Zhuang Chen
Organic–inorganic hybrid metal halides have emerged as promising luminescent materials owing to their structural tunability and exceptional photoluminescence modulation capabilities, showing great potential in optoelectronic applications. Herein, we report the successful design of a novel series of zero-dimensional (0D) Mn(II)-based organic–inorganic hybrid halides with enhanced photoluminescence quantum yields (PLQYs) through strategic organic cation engineering. Specifically, in this paper, the methyl group (–CH3) at the fourth position of the benzene ring in the organic cation was replaced with hydrogen (–H) and cyano (–CN) groups. The average distance of Mn⋯Mn was successfully adjusted from 8.925 Å to 8.970 Å and 8.986 Å, and the PLQY was modulated from 35.74% to 59.04% and 81.38%. This work establishes a new paradigm for rationally designing high-performance luminescent materials through molecular-level structural engineering, providing valuable insights for developing advanced optoelectronic devices in sensing, information encryption, and radiation detection applications.
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Zhijiang Rong,Wei Guo,Haotian Liang,Huan Lv,Hua Guo,Yi Zhang,Bo Zhang,Chunyan Hao,Xianjun Liu,Hongyan Sun,Yifan Gao
Biological metal ions play crucial roles in various life processes and exhibit diverse biological functions. Specifically, Ca(II), Mg(II), Cu(II), and Mn (II) ions are intricately involved in insulin function. To further clarify the biological functions of biological metal ions on insulin, the interaction mechanism of insulin affected by Ca(II), Mg(II), Cu(II), and Mn (II) ions were comparably investigated via spectroscopic, circular dichroism(CD), and electrochemical approaches. Electrochemical studies demonstrate that Mn(II) forms an M 2 L-type complex with insulin, exhibiting a binding constant of β Mn = 9.3 × 10 9 , while Cu(II) and insulin form an M 4 L-type complex with a significantly higher binding constant of β Cu =9.18 × 10 12 . Electrochemical investigation of the interaction between Ca(II) and Mg(II) with insulin adsorbed onto a glass carbon electrode surface revealed that the presence of Ca(II) and Mg(II) induced conformational changes in insulin, resulting in reduced adsorption capacity. Additionally, it was observed that the presence of Ca(II) and Mg(II) enhanced the redox signal of probe ions. The binding constants values were calculated to be 1.108 × 10 3 L•mol –1 for the insulin-Ca(II) system and 2.28 ×10 2 L• mol –1 for the insulin-Mg(II) system. Spectroscopic studies showed that the binding of Cu(II) ions to insulin molecules may be controlled by chelation mechanism, and the interaction between Cu(II) ions and insulin molecules may occur in the aromatic region. Mn(II) ion binding is mainly controlled by ionic interactions, and its binding site is far away from the aromatic region.The combination of Ca(II) and Mg(II) with insulin induced a small enhancement in the Ultraviolet-visible (UV) absorption peak, with Ca(II) exhibiting a more pronounced effect compared to Mg(II). The results of spectral, CD and electrochemical studies are consistent.
研究领域:
生物化学
·
电化学
·
分子生物学
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DOI
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Hongmei Tang,Meiqing Chen,Pingxiao Wu,Yihao Li,Tianming Wang,Jiayan Wu,Leiye Sun,Zhongbo Shang
Schwertmannite (Sch) is considered as an effective remover of Chromium (Cr) due to its strong affinity for toxic Cr species. Since the instability of Sch, the environmental fate of Cr deserves attention during the transformation of Sch into a more stable crystalline phase. The ubiquitous manganese(II) (Mn(II)) probably affects the transformation of Sch and thus the environmental fate of Cr. Therefore, this study investigated the impact of Mn(II) on the transformation of Cr-absorbed Sch (Cr-Sch) and the associated behavior of SO 4 2− and Cr. We revealed that the transformation products of Cr-Sch at pH 3.0 and 7.0 were goethite and Sch, respectively. The presence of Mn(II) weakened the crystallinity of the transformation products, and the trend was positively correlated with the concentration of Mn(II). However, Mn(II) changed the transformation products of Cr-Sch from hematite to goethite at pH 10.0. Mn(II) replaced Fe(III) in the mineral structures or formed Mn-O complexes with surface hydroxyl groups (-OH), thereby affecting the transformation pathways of Sch. The presence of Mn(II) enhanced the immobilization of Cr on minerals at pH 3.0 and 7.0. Sch is likely to provide an channel for electron transfer between Mn(II) and Cr(VI), which promotes the reduction of Cr(VI). Meanwhile, Mn(Ⅱ) induced more -OH production on the surface of secondary minerals, which played an important role in increasing the Cr fixation. In addition, part of the Mn(Ⅱ) was oxidized to Mn(Ⅲ)/Mn(Ⅳ) at pH 3.0 and pH 7.0. This study helps to predict the role of Mn(II) in the transformations of Cr-Sch in environments and design remediation strategies for Cr contamination.
研究领域:
环境科学
·
矿物学
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Guihao Hu,Yu Li,Yao Liu,Jie Yang,Tiantian Luo,Jie Zhong,Wensheng Yue,Zhike Li,Xianfu Li,Jiang Zhu
Tumor hypoxia limits radiotherapy and chemotherapy efficacy by promoting treatment resistance, while hypoxia-activated prodrugs (HAPs) like Tirapazamine (TPZ) face clinical failure due to insufficient tumor hypoxia. To address this challenge, we engineered HRP-catalyzed Mn(II) chelate-doped TPZ@CaCO₃/PDA-Mn@PEG nanoparticles (TCPPM NPs) that actively amplify hypoxia for potent TPZ activation. The hollow CaCO₃ core enables pH-responsive TPZ release (80% at pH 5.5), while the Mn-DopaCDTA-doped PDA shell provides enhanced T1-weighted MRI contrast ( r ₁ = 17.6 mM⁻¹s⁻¹, per Mn, 25 °C, 0.5 T), photoacoustic/ultrasound imaging, and synergistic PTT/PDT via ROS generation (4.0-fold increase, 1% O₂ conditions). In 4T1 tumor models, TCPPM NPs achieved 85% tumor reduction (vs. 45% for TPZ alone) and 45-day survival, overcoming HAP limitations through hypoxia amplification (PDA ROS O₂ consumption + 61.3 °C PTT) and calcium-mediated mitochondrial damage. This HAP-specific theranostic platform integrates precise imaging-guided therapy, presenting a breakthrough for hypoxia-targeted cancer treatment.
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DOI
高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2021
·
IF 7.446
Keyu Chen,Pan Li,Chunrong Zhu,Zhiyang Xia,Qian Xia,Lei Zhong,Bin Xiao,Tao Cheng,Changqiang Wu,Chengyi Shen,Xiaoming Zhang,Jiang Zhu
Liver-specific contrast agents (CAs) can improve the Magnetic resonance imaging (MRI) detection of focal and diffuse liver lesions by increasing the lesion-to-liver contrast. A novel Mn(II) complex, Mn-BnO-TyrEDTA, with a lipophilic group-modified ethylenediaminetetraacetic acid (EDTA) structure as a ligand to regulate its behavior in vivo, is superior to Gd-EOB-DTPA in terms of a liver-specific MRI contrast agent. An MRI study on mice demonstrated that Mn-BnO-TyrEDTA can be rapidly taken up by hepatocytes with a combination of hepatobiliary and renal clearance pathways. Bromosulfophthalein (BSP) inhibition imaging, biodistribution, and cellular uptake studies confirmed that the mechanism of hepatic targeting of Mn-BnO-TyrEDTA is the hepatic uptake of the amphiphilic anion contrast agent mediated by organic anion transporting polypeptides (OATPs) expressed by functional hepatocytes.
研究领域:
医学影像
·
药物化学
·
放射学
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 182
·期 1
·193-200
·
IF 3.719
Ren Xiaohui,Liu Haochi,Chen Ligang
We show that Mn(II)-doped ZnS quantum dots coated with an acrylamide-based molecularly imprinted polymer (MIP-coated QDs) can act as a fluorescent probe for the selective and sensitive detection of the insecticide chlorpyrifos (CPF). The fluorescence of the coated QDs is quenched on loading the MIP with CPF, and the effect is much stronger for the MIP than for the non-imprinted polymer. The MIP-coated QDs were characterized by fluorescence spectrophotometry, X-ray powder diffraction, and scanning electron microscopy. Under optimal conditions, the relative fluorescence intensity of the MIP-coated QDs decreases linearly with the increasing concentration of CPF in the 0.3–60 μmol L −1 concentration range, and the detection limit is 17 nmol L −1 . The method has been used for the determination of CPF in spiked water samples and gave recoveries in the range from 87.1 to 94.5 % with relative standard deviations in the 2.9 to 6.5 % range. The method is simple, safe and inexpensive.
研究领域:
分析化学
·
环境科学
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Shule Duan,Huiyu Dong,Pin Hou,Gangsheng Han,Bochao Zhang,Zhimin Qiang
Permanganate (Mn(VII)) is a widely used oxidant in water treatment , which can oxidize trace organic contaminants (TrOCs) and Mn(II). Interestingly, this study found that presence of Mn(II) could accelerate the abatement of bisphenol A by Mn(VII) only under oxic condition . Herein, the effects of Mn(II) and dissolved oxygen (DO) on the abatement of TrOCs by Mn(VII) oxidation and the related mechanism were investigated. Results indicate that DO was involved in the Mn(VII)/Mn(II) reaction, with the reaction stoichiometry of Δ[Mn(VII)]:Δ[Mn(II)] determined to be 1:2 and 1:1.5 in the presence and absence of DO, respectively. Quenching and electron paramagnetic resonance tests verified that both superoxide radicals (O 2 •− ) and reactive Mn species contributed to the accelerated abatement of TrOCs (bisphenol A, methyl phenyl sulfoxide, and methyl phenyl sulfone) in the Mn(VII)/Mn(II) process. Specifically, O 2 •− was produced through the one-electron reduction of DO and made an important contribution (32.4%–100%) to the abatement of selected TrOCs. This study reveals that Mn(II) could enhance TrOC abatement by Mn(VII) oxidation, and DO played a pivotal role in the Mn(VII)/Mn(II) process.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yiqing Liu,Ting Wang,Zhengjie Chen,Shenglan Liu,Yongsheng Fu
Currently, the research on bisulfite (BS) activation by Mn(II) is very limited probably because of the low catalytic efficiency of Mn(II). Adding ligands to Mn(II)/BS system is likely to improve the BS activation, but the relative information is very rare. Therefore, the effect of nitrilotriacetic acid (NTA) on Mn(II)/BS system was investigated in this work using sulfamethoxazole (SMX) as the target contaminant. The results showed that the addition of NTA enhanced SMX removal in Mn(Ⅱ)/BS system through forming Mn(Ⅱ/III)-NTA complexes driving Mn(III)/Mn(II) cycle and stabilizing Mn(III). Alcohol scavenging experiments and competitive kinetic experiments indicated that sulfate radical (SO 4 •− ) and hydroxyl radical (HO • ) were not the main reactive species in Mn(II)/NTA/BS system. Mn(Ⅲ) was the primary oxidant for SMX elimination in this system and its existence was proved by UV-Vis absorption spectrum of reaction solution. Mn(Ⅱ)/NTA/BS system could greatly degrade SMX in near-neutral conditions, while nearly no SMX removal was observed at pH 3.0. The decrease of dissolved oxygen concentration significantly inhibited BS autocatalytic stage, thus suppressing the removal of SMX. Due to the competitive complexation of HCO 3 − and FA with NTA for Mn(II), their addition in Mn(Ⅱ)/NTA/BS system obviously inhibited SMX degradation . Four intermediates were detected during SMX degradation in Mn(Ⅱ)/NTA/BS system, and the possible SMX transformation pathways were speculated as N-S bond breaking, hydroxylation, amino oxidation and coupling reaction.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Si-Hui Tan,Zhao-Hui Chen,Xi Jiang,Guo-Qing Zhong
Two manganese(II) and bismuth(III) complexes of the formulae [Mn(H 2 O) 6 ]·H 2 bptc ( 1 ) and (H 2 bipy) 2 [Bi 2 Cl 10 ]∙2H 2 O ( 2 ) (H 4 bptc = 3,3′,4,4′-biphenyltetracarboxylic acid, bipy = 4,4′-bipyridine) were synthesized. The complexes were characterized by elemental analyses, single-crystal X-ray diffraction, powder X-ray diffraction, infrared spectra, and thermal analyses. Structurally, 1 is a mononuclear complex with a triclinic space group P 1 ‾ . 2 is a dinuclear complex and it is built of two Bi 3+ ion cores bridged through two Cl − ions. Furthermore, the result of fluorescence showed that 1 had fluorescent property. And the nanometer manganese oxide was prepared using 1 as a precursor. In addition, the photocatalytic activity of 2 on the degradation of Rhodamine B (RhB) was investigated and a possible photocatalytic mechanism was proposed.
研究领域:
无机化学
·
材料科学
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产品关联
DOI
高影响因子
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