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Polypod Carboxylic Acid-Rare Earth Complex with High Cyclic Stability for Nitrobenzene Compound Detection. 用于硝基苯化合物检测的高循环稳定性聚羧酸稀土复合物。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-26 DOI: 10.1007/s10895-024-03948-7
Licong Chen, Rui Shi, Zhongzhi Wang, Xin Qiao, Pengcheng Hao, Wenyu Zhao

The 5',5''-bis(4-carboxyphenyl)-[1,1':3',1'':3'',1'''-quaterphenyl]-4,4'''-dicarboxylic (H4L1) ligand has a large conjugated rigid planar structure and good absorption of ultraviolet radiation, which can provide effective "antenna effect". However, rare earth complexes using H4L1 as the sole ligand have not been reported. In this paper, rare earth Eu was combined with H4L1 ligand to produce organic rare earth composite L1-Eu by solvothermal synthesis method. It was found through fluorescence spectroscopy that the emission of L1-Eu complex has a linear response to nitrobenzene compounds. The L1-Eu composite material has a low detection limit for nitrobenzene compounds, with detection limits of 0.910, 8.401, 24.510, and 8.171 µM for nitrobenzene, o-nitrophenol, m-nitrophenol, and p-nitrophenol, respectively. Further more the L1-Eu complex can sensitively respond to nitrobenzene compounds while resisting interference from common metal ions and organic solvents. In particular, L1-Eu composite material has good stability and recyclability. Therefore, L1-Eu composite material can serve as a fluorescent probe for specific detection of nitrobenzene compounds. We believe that the L1-Eu complex provides a new method for fluorescence detection of nitrobenzene compounds.

5',5''-双(4-羧基苯基)-[1,1':3',1'':3'',1'''-四联苯]-4,4'''-二羧酸(H4L1)配体具有大共轭刚性平面结构,对紫外线辐射具有良好的吸收能力,可提供有效的 "天线效应"。然而,以 H4L1 为唯一配体的稀土配合物尚未见报道。本文采用溶热合成法,将稀土 Eu 与 H4L1 配体结合,制备出有机稀土复合物 L1-Eu。通过荧光光谱发现,L1-Eu 复合物的发射对硝基苯化合物具有线性响应。L1-Eu 复合物材料对硝基苯化合物的检测限很低,对硝基苯、邻硝基苯酚、间硝基苯酚和对硝基苯酚的检测限分别为 0.910、8.401、24.510 和 8.171 µM。此外,L1-Eu 复合物对硝基苯化合物的反应灵敏,同时还能抵抗普通金属离子和有机溶剂的干扰。特别是,L1-Eu 复合材料具有良好的稳定性和可回收性。因此,L1-Eu 复合材料可作为荧光探针,用于特异性检测硝基苯化合物。我们相信,L1-Eu 复合物为硝基苯化合物的荧光检测提供了一种新方法。
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引用次数: 0
Synthesis of P-Rich Carbon Quantum Dots for Sensitive Fluorescent Detection of 2-Methylimidazole. 用于灵敏荧光检测 2-甲基咪唑的富 P 碳量子点的合成。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-26 DOI: 10.1007/s10895-024-03946-9
Zhengyuan Dai, Hao Liu, Xuyuan Sun, Ying Wang, Jie Fan, Li Li, Yaping Ding

Using o-phenylenediamine as carbon source and phytic acid as phosphorus source, two P-rich carbon quantum dots RCDs and BCDs were synthesized successfully by changing the reaction temperature and time of hydrothermal method. It was found that RCDs with red emission could realize sensitive detection of 2-methylimidazole, and 2-methylimidazole had no obvious quenching effect on BCDs with blue emission, which made RCDs a sensitive, quick and selective fluorescence sensor for 2-methylimidazole detection. Under the optimal experimental conditions, the fluorescence intensity of RCDs decreased with the increasing of 2-methylimidazole concentration. The detection of 2-methylimidazole concentration by the carbon quantum dots sensor showed a good linear relationship in the range of 5 ~ 110 µM, and the low detection limit was 0.61 µM (S/N = 3). The sensor is able to detect 2-methylimidazole in lake water, enabling the application of real samples. The results show that this work provides a simple fluorescence method to detect 2-methylimidazole in water.

以邻苯二胺为碳源,植酸为磷源,通过改变水热法的反应温度和时间,成功合成了RCD和BCD两种富P碳量子点。实验发现,红色发射的RCDs可实现对2-甲基咪唑的灵敏检测,且2-甲基咪唑对蓝色发射的BCDs无明显的淬灭效应,这使得RCDs成为一种灵敏、快速、选择性好的2-甲基咪唑检测荧光传感器。在最佳实验条件下,RCDs 的荧光强度随 2-甲基咪唑浓度的增加而降低。碳量子点传感器对 2-甲基咪唑浓度的检测在 5 ~ 110 µM 范围内呈现出良好的线性关系,低检测限为 0.61 µM(S/N = 3)。该传感器能够检测湖水中的 2-甲基咪唑,可应用于实际样品。结果表明,这项工作提供了一种检测水中 2-甲基咪唑的简单荧光方法。
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引用次数: 0
Rapid Quantification of Oxytetracycline Based on Fluorescence Enhancement Influenced by pH. 基于 pH 值影响的荧光增强快速定量土霉素
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-26 DOI: 10.1007/s10895-024-03941-0
Xiaodian Huang, Dong Yang, Liang Song, Yongcan Jiang

Accurate quantification of antibiotics in environmental samples is typically challenging due to the low antibiotic concentrations and the complexity of environmental matrices. This paper presents a fluorescence spectrometry method for determining oxytetracycline under alkaline conditions. The ionic distribution of the oxytetracycline solution was analyzed based on its dissociation constant. The dimethylamino group plays a crucial role in this method, as it promotes intramolecular charge transfer in the electronic excited state through its electron-donating capability with a lone electron pair. The presented method is straightforward, cost-effective, and holds potential for analyzing oxytetracycline in water sample after further investigation.

由于抗生素浓度低、环境基质复杂,环境样本中抗生素的精确定量通常具有挑战性。本文介绍了一种在碱性条件下测定土霉素的荧光光谱法。根据土霉素的解离常数分析了土霉素溶液的离子分布。二甲基氨基在该方法中起着至关重要的作用,因为它通过孤电子对的电子供能能力促进了电子激发态下的分子内电荷转移。该方法简便易行、成本低廉,经进一步研究后有望用于分析水样中的土霉素。
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引用次数: 0
Optical Chemosensor as a Sensitive and Selective Tool for the Detection of Thiocyanate Ions Via Cu2+ Induced Sensor and Its Practical Application. 通过 Cu2+ 诱导传感器检测硫氰酸根离子的灵敏且具有选择性的光学化学传感器及其实际应用。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-26 DOI: 10.1007/s10895-024-03943-y
Parul Bhalla, Rajesh Malhotra

In various fields, including analytical, environmental, and biochemistry, the detection of ions is significant. A simple probe, 3-(1-((4-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (DPD), was designed for this study and used for the detection of Cu2+ ions in methanol, based on dehydroacetic acid and phenylenediamine moieties. Binding interactions studies were performed using UV-Vis measurements, which showed selective binding behaviour towards Cu2+ ions. The HRMS spectral data and Job's plot were used to check the stoichiometry ratio of 2:1 of a probe to Cu2+ ions. A detection limit of 1.38×10-7 M for Cu2+ ions was observed. Theoretical DFT calculations were used to determine the quantum parameters and the energy gap between frontier molecular orbitals. Interestingly, the DPD-Cu2+ complex acted as a probe for the detection of SCN- ions at a low LOD value, i.e., 1.97×10-7 M. A novel incidence of reversibility with SCN- ions was reported using the HRMS technique. Next, real water and blood samples were used, and the concentration of Cu2+ ions was calculated to further analyse the practical applicability of the probe. The DPD probe showed better selectivity and sensitivity than previously reported sensors, especially in complex matrices, where other sensors frequently experience interference and detection limit issues, indicating its potential as an advanced tool for ion detection in various applications.

在分析、环境和生物化学等多个领域,离子的检测都具有重要意义。本研究设计了一种简单的探针--3-(1-((4-氨基苯基)亚氨基)乙基)-4-羟基-6-甲基-2H-吡喃-2-酮(DPD),用于检测甲醇中的 Cu2+ 离子,该探针基于脱氢乙酸和苯二胺分子。利用紫外可见光测量进行了结合相互作用研究,结果表明其对 Cu2+ 离子具有选择性结合行为。利用 HRMS 光谱数据和约伯图来检验探针与 Cu2+ 离子的 2:1 的化学计量比。观察到 Cu2+ 离子的检测限为 1.38×10-7 M。理论 DFT 计算用于确定量子参数和前沿分子轨道之间的能隙。有趣的是,DPD-Cu2+ 复合物可作为探针,以较低的 LOD 值(即 1.97×10-7 M)检测 SCN- 离子。接着,利用真实的水样和血样,计算了 Cu2+ 离子的浓度,进一步分析了探针的实用性。与之前报道的传感器相比,DPD 探针显示出更好的选择性和灵敏度,尤其是在复杂基质中,而其他传感器经常会遇到干扰和检测极限问题,这表明它有潜力成为各种应用中离子检测的先进工具。
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引用次数: 0
Green Synthesis of Boric Acid Modified Bismuth Based Non-Toxic Perovskite Quantum Dots for Highly Sensitive Detection of Oxytetracycline. 用于高灵敏度检测土霉素的硼酸修饰铋基无毒包光体量子点的绿色合成。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-26 DOI: 10.1007/s10895-024-03933-0
Jiali Liu, Chen Li, Shen Zhang, Xiao Wei, Yue Gao, Fei Wang, Mengwei Yan, Jiaqi Wang, Yuhui Zhang

In recent years, perovskite quantum dots (PQDs) have successfully attracted widespread attention due to their excellent optical properties. However, the instability and toxicity problems of perovskite quantum dots are the main obstacles limiting their applications. In this work, bismuth-based perovskite quantum dots were synthesized by a ligand-assisted reprecipitation method, based on which a novel boric acid-functionalized bismuth-based non-toxic perovskite quantum dots fluorescent sensor (Cs3Bi2Br9-APBA) that can be stabilized in the ethanol phase was prepared by a boron affinity technique. Based on the covalent binding interaction of Cs3Bi2Br9-APBA with oxytetracycline (OTC), a highly selective and sensitive method for the detection of OTC was developed, which effectively solved the problems of poor stability and toxicity in the application of perovskite quantum dots. Under the optimal conditions, the fluorescence intensity of the synthesized Cs3Bi2Br9-APBA was linear with the concentration range of 0.1 ∼ 18 µM OTC, and the detection limit could reach 0.0802 µM. The fluorescence detection mechanism was explored and analyzed by spectral overlap analysis, suppression efficiency study of observed and corrected fluorescence, and fluorescence lifetime decay curve fitting, the mechanism of OTC detection by Cs3Bi2Br9-APBA was identified as the inner filter effect (IFE). In addition, the sensor successfully realized the quantitative detection of trace OTC in the environment, and our study provides a new idea for the preparation of green perovskite materials with high stability and selectivity.

近年来,过氧化物量子点(PQDs)因其优异的光学特性成功吸引了广泛关注。然而,包晶量子点的不稳定性和毒性问题是限制其应用的主要障碍。本研究采用配体辅助重沉淀法合成了铋基高闪石量子点,并在此基础上利用硼亲合技术制备了可稳定于乙醇相的新型硼酸官能化铋基无毒高闪石量子点荧光传感器(Cs3Bi2Br9-APBA)。基于 Cs3Bi2Br9-APBA 与土霉素(OTC)的共价结合作用,建立了一种高选择性、高灵敏度的 OTC 检测方法,有效解决了过氧化物量子点应用中稳定性差和毒性大的问题。在最佳条件下,合成的Cs3Bi2Br9-APBA的荧光强度在0.1∼18 µM OTC浓度范围内呈线性关系,检出限可达0.0802 µM。通过光谱重叠分析、观察荧光和校正荧光的抑制效率研究、荧光寿命衰减曲线拟合等方法对荧光检测机理进行了探索和分析,确定了 Cs3Bi2Br9-APBA 检测 OTC 的机理为内滤波效应(IFE)。此外,该传感器成功实现了对环境中痕量 OTC 的定量检测,为制备高稳定性和高选择性的绿色过氧化物材料提供了新思路。
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引用次数: 0
Novel Donor-Acceptor Based 4-Nitrophenol Luminophores as a Yellow-Orange Fluorescent Material for Optoelectronic Applications. 基于供体-受体的新型 4-硝基苯酚发光体作为光电应用领域的黄橙色荧光材料。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-25 DOI: 10.1007/s10895-024-03938-9
K G Mane, S R Pujari, V B Shahabade, P B Nagore

A new category of 4-nitrophenol (4-NP) luminophores, infused with varying amounts of Pyrene (Py), was synthesized using the standard solid-state reaction method to investigate novel luminophores that emit at longer wavelengths. Their optical and electrochemical properties were analyzed using fluorimetry and cyclic voltammetry techniques. The fluorescence spectrum of Py-doped 4-NP displayed a broad fluorescence band with a peak at 599 nm for a Py concentration of 1 × 10- 3 mol, indicating exciplex formation between 4-NP and Py in the excited state. The electrochemical data revealed that the energy levels of the Highest Occupied Molecular Orbital (HOMO) and Lowest Unoccupied Molecular Orbital (LUMO) for the synthesized luminophores ranged from - 5.72 to -5.73 eV and - 3.01 to -3.08 eV, respectively. Thermal stability was evaluated through TGA analysis. The XRD confirmed the synthesis of a homogeneous material. The SEM images showed crystal sizes of approximately 115 nm. This thorough investigation indicates the potential of these newly synthesized yellow-orange fluorescent luminophores for optoelectronic applications.

采用标准固态反应方法合成了一种注入了不同数量芘(Py)的新型 4-硝基苯酚(4-NP)发光体,以研究能发射更长波长的新型发光体。利用荧光测定法和循环伏安法分析了它们的光学和电化学特性。在 Py 浓度为 1 × 10- 3 mol 时,掺杂 Py 的 4-NP 的荧光光谱显示出一条宽荧光带,在 599 nm 处有一个峰值,表明 4-NP 与 Py 在激发态形成了复合物。电化学数据显示,合成的发光体的最高占位分子轨道(HOMO)和最低未占位分子轨道(LUMO)的能级分别为 - 5.72 至 - 5.73 eV 和 - 3.01 至 - 3.08 eV。通过 TGA 分析评估了热稳定性。XRD 证实合成了一种均质材料。扫描电镜图像显示晶体大小约为 115 nm。这项深入研究表明,这些新合成的橘黄色荧光发光体具有光电应用的潜力。
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引用次数: 0
Sustainable Doped Carbon Dots as Antioxidant and Nanocarrier for Therapeutic Cargos. 可持续掺杂碳点作为抗氧化剂和治疗用纳米载体。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-25 DOI: 10.1007/s10895-024-03940-1
Afzal Hussain, Mohamed Fahad Alajmi, S Ganguly

Aside from their fluorescence sensing capabilities, carbon dots doped with heteroatoms show tremendous promise as nanocarriers for medicinal compounds and as antioxidants. We present a method for producing carbon dots from chitosan and lemon extract (CLCDs) using a one-step hydrothermal coupling synthesis. The as-synthesized CLCDs exhibited remarkable colloidal stability, antioxidant behavior, cytocompatibility, and nanocarrier for drug molecules. The nanoparticles was analyzed using advanced techniques such as Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), fluorescence spectroscopy, electron paramagnetic resonance (EPR) spectroscopy, and transmission electron microscopy (TEM) to determine the precise composition of their surface. In order to evaluate the drug transport properties of CLCDs, their surfaces were further modified with anticancer drug compounds. The drug release behavior was studied against physiologically simulated fluids and at different pH environments showing better delayed response in acidic condition. The plausible mechanistic pathways have been confirmed after fitting the results into Higuchi, Weibull and Korsmeyer-Peppas models. The goodness of fit was more than 95% for the Korsmeyer-Peppas model, with the release mechanism supported by anomalous transport. Moreover, the radical scavenging activity of CLCDs was also confirmed at low levels (1 mg/mL) which could be inferred > 85% efficacy against mostly employed testing agents (DPPH, ABTS, and hydroxyl radicals). Thus, the prepared CLCDs could be used as suitable nanovector in payload delivery with prominent antioxidant activity and low toxicity against living cell lines.

除了荧光传感功能外,掺杂杂原子的碳点作为药用化合物的纳米载体和抗氧化剂也大有可为。我们介绍了一种利用壳聚糖和柠檬提取物一步水热偶联合成制备碳点(CLCDs)的方法。合成的 CLCDs 具有显著的胶体稳定性、抗氧化性、细胞相容性和药物分子的纳米载体。利用傅立叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)、荧光光谱、电子顺磁共振(EPR)光谱和透射电子显微镜(TEM)等先进技术对纳米颗粒进行了分析,以确定其表面的精确成分。为了评估 CLCD 的药物传输特性,用抗癌药物化合物对其表面进行了进一步修饰。针对生理模拟流体和不同 pH 值环境下的药物释放行为进行了研究,结果表明在酸性条件下药物释放的延迟反应更好。在将结果拟合到 Higuchi、Weibull 和 Korsmeyer-Peppas 模型后,确认了合理的机理途径。Korsmeyer-Peppas 模型的拟合优度超过 95%,其释放机制得到了反常迁移的支持。此外,CLCDs 的自由基清除活性在低浓度(1 毫克/毫升)下也得到了证实,可以推断其对大多数测试剂(DPPH、ABTS 和羟基自由基)的功效大于 85%。因此,所制备的 CLCDs 可作为合适的纳米载体,用于有效载荷的传输,具有突出的抗氧化活性和对活细胞株的低毒性。
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引用次数: 0
Solvent Polarity Dependent Ultrafast Relaxation Kinetics of ADS800AT Dye. ADS800AT 染料的溶剂极性依赖性超快弛豫动力学。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-25 DOI: 10.1007/s10895-024-03932-1
Sajin Ponnan, D Narayana Rao, Sri Ram G Naraharisetty

This work investigated the photoexcitation and relaxation kinetics of the ADS800AT dye dissolved in different solvents using transient absorption spectroscopy (TAS) with a white-light continuum probe. The dye was dissolved in various solvents, including dichloromethane (DCM), 1,2-dichlorobenzene (DCB), ethanol, and methanol, to study their impact on the dye's characteristics. The linear absorption peak varied from 835 to 809 nm, depending on the polarity of the solvent, and the pump wavelength for TAS was chosen accordingly. We observed ground-state bleaching and excited-state absorption after exciting the dye with the pump pulse. Global analysis was performed using Glotaran software to fit exponential decay curve models, allowing us to determine the relaxation time of the excited molecule. The relaxation time varied from 198 ps to 508 ps across the different solvents, decreasing as the polarity of the solvent increased. Additionally, we could experimentally correlate the dye molecule's nonlinear properties with the solvent's polarity.

本研究利用白光连续探针瞬态吸收光谱(TAS)研究了溶解在不同溶剂中的 ADS800AT 染料的光激发和弛豫动力学。将染料溶解在二氯甲烷(DCM)、1,2-二氯苯(DCB)、乙醇和甲醇等不同溶剂中,研究它们对染料特性的影响。线性吸收峰在 835 到 809 纳米之间变化,这取决于溶剂的极性,TAS 的泵波长也相应选择。我们观察到了泵脉冲激发染料后的基态漂白和激发态吸收。我们使用 Glotaran 软件进行了全局分析,拟合了指数衰减曲线模型,从而确定了激发态分子的弛豫时间。不同溶剂的弛豫时间从 198 ps 到 508 ps 不等,随着溶剂极性的增加而减少。此外,我们还可以通过实验将染料分子的非线性特性与溶剂的极性联系起来。
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引用次数: 0
Visualizing Mitochondrial Membrane Potential with FRET Probes: Integrating Fluorescence Intensity Ratio and Lifetime Imaging. 用 FRET 探针观察线粒体膜电位:整合荧光强度比和寿命成像。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-25 DOI: 10.1007/s10895-024-03929-w
Fei Peng, Xiangnan Ai, Xiaoyu Bu, Zixuan Zhao, Baoxiang Gao

Mitochondrial membrane potential (MMP) is crucial for mitochondrial function and serves as a key indicator of cellular health and metabolic activity. Traditional lipophilic cationic fluorescence intensity probes are unavoidably influenced by probe concentration, laser intensity, and photobleaching, limiting their accuracy. To address these issues, we designed and synthesized a pair of fluorescence molecules, OR-C8 and SiR-BA, based on the Förster Resonance Energy Transfer (FRET) mechanism, for dual-modality visualization of MMP. OR-C8 anchors to the inner mitochondrial membrane through strong hydrophobic interactions, while SiR-BA is expelled from mitochondria when MMP decreases, thereby regulating the FRET process. During MMP reduction, the fluorescence intensity and lifetime of OR-C8 increase, while the fluorescence intensity of SiR-BA decreases. By combining changes in fluorescence intensity ratio and fluorescence lifetime, dual-modality visualization of MMP was achieved. This method not only accurately reflects MMP changes but also provides a novel tool for in-depth studies of mitochondrial function and related disease mechanisms, offering significant potential for advancing mitochondrial research and therapeutic development.

线粒体膜电位(MMP)对线粒体功能至关重要,是细胞健康和代谢活动的关键指标。传统的亲脂性阳离子荧光强度探针不可避免地会受到探针浓度、激光强度和光漂白的影响,从而限制了其准确性。为了解决这些问题,我们设计并合成了一对基于佛斯特共振能量转移(FRET)机制的荧光分子--OR-C8 和 SiR-BA,用于 MMP 的双模式可视化。OR-C8 通过强烈的疏水相互作用锚定在线粒体内膜上,而 SiR-BA 则在 MMP 降低时从线粒体中排出,从而调节 FRET 过程。在 MMP 降低过程中,OR-C8 的荧光强度和寿命增加,而 SiR-BA 的荧光强度降低。通过结合荧光强度比和荧光寿命的变化,实现了 MMP 的双模式可视化。这种方法不仅能准确反映 MMP 的变化,还为深入研究线粒体功能和相关疾病机制提供了一种新工具,为推动线粒体研究和治疗开发提供了巨大潜力。
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引用次数: 0
Synthesis and Characterizations of Novel bi-ligand TbEu(cpioa)phen Phosphors with High Quantum Efficiency for WLED Applications. 用于 WLED 应用的具有高量子效率的新型双配体 TbEu(cpioa)phen 荧光的合成与表征。
IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Pub Date : 2024-09-25 DOI: 10.1007/s10895-024-03927-y
Qianwei Wang, Qi Wu, Jinhu Guo, Xinyu Yang, Mengxuan Fang, Jiaoying Wang, Minghui Tai, Yichong Cheng, Dalai Jin, Longcheng Wang

The hydrothermal method was employed to synthesize a novel bi-ligands LnMOF: Ln(cpioa)phen. The secondary ligand 1, 10-phen serves as a bridging agent to further facilitate energy transfer between Ln ions and the primary ligand H3cpioa. A comparison between Ln(cpioa) MOFs (Ln: Tb3+, Eu3+) and Ln(cpioa)phen MOFs (Ln: Tb3+, Eu3+) reveals that addition of the secondary ligand significantly improves the emission intensity by as high as almost 34 times. After detailed structural study, it is found that different Ln ions have the similar coordination in the Ln(cpioa)phen MOF. In addition, the chromaticity of Ln(cpioa)phen MOFs can be easily tuned by the amounts of doping Ln ions. La0.974Tb0.0255Eu0.0005(cpioa)phen MOF has a white emission with a CIE coordinate of (0.323, 0.343). Characterizations of corresponding LED devices show that device based on Ln(cpioa)phen MOF has better photoluminescence performances, which indicates that Ln(cpioa)phen MOF has great potential of for WLED applications.

采用水热法合成了新型双配体 LnMOF:Ln(cpioa)phen。次配体 1,10-phen 可作为桥接剂,进一步促进 Ln 离子与主配体 H3cpioa 之间的能量转移。对 Ln(cpioa) MOFs(Ln:Tb3+、Eu3+)和 Ln(cpioa)phen MOFs(Ln:Tb3+、Eu3+)进行比较后发现,加入次配体后,发射强度显著提高了近 34 倍。经过详细的结构研究发现,不同的 Ln 离子在 Ln(cpioa)phen MOF 中具有相似的配位。此外,Ln(cpioa)phen MOFs 的色度可通过掺杂 Ln 离子的数量轻松调节。La0.974Tb0.0255Eu0.0005(cpioa)phen MOF 具有 CIE 坐标为 (0.323, 0.343) 的白色发射。相应 LED 器件的表征结果表明,基于 Ln(cpioa)phen MOF 的器件具有更好的光致发光性能,这表明 Ln(cpioa)phen MOF 在 WLED 应用方面具有巨大的潜力。
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引用次数: 0
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Journal of Fluorescence
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