JOURNAL OF CHEMICAL THERMODYNAMICS
·
2017
·
IF 2.726
Qing-Qing Zhao,Xiao-Hui Wu,Ning Ren,Jian-Jun Zhang,Li-Na Geng
Two novel lanthanide complexes with the general formula [Ln(2-Br-5-MOBA) 3 (2,2′-DIPY)] 2 (Ln = Pr(1), Dy(2); 2-Br-5-MOBA = 2-bromine-5-methoxybenzoate; 2,2′-DIPY = 2,2′-bipyridine) have been successfully synthesized and characterized. The complexes 1 and 2 are isostructural and nine-coordinated with distorted monocapped square antiprismatic coordination geometry by the single-crystal X-ray diffraction analyses. Two complexes are all assembled into the 1D, 2D, 3D supramolecular structures by C H⋯O hydrogen bonding and π–π stacking interactions. The thermal decomposition mechanism for title complexes were obtained by TG/DSC-FTIR technology. The molar heat capacities of the complexes 1 and 2 are measured by a DSC instrument over the temperature range from 263.15 K to 365.15 K. On the basis of the fitted polynomial and thermodynamic equations, the smoothed values of heat capacities and thermodynamic functions ( H T - H 298.15K ), and ( S T - S 298.15K ) of the two complexes are calculated. In addition, the fluorescence spectra indicate that the complex 2 exhibits the characteristic emission of Dy(III) ion ( 4 F 9/2 → 6 H 13/2–15/2 ).
研究领域:
无机化学
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材料科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2014
·Vol. 640
·期 11
·2255-2260
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IF 1.251
Zhi-Wen Nie,Sha-Sha Li,Cheng-Hui Zeng,Lei Wang,Yuan Li,Shun-Gao Yin,Sheng-Liang Zhong
[TbNa(4-msal) 4 (phen) 2 ] n ( 1 ) (4-msal = 4-methyl salicylic acid), a new hetero-metallic lanthanide coordination polymer (CP) involving sodium was synthesized. It crystallizes in the monoclinic space group P 2 1 / n , with a = 20.4809(9) Å, b = 9.8183(2) Å, c = 26.1987(11) Å, α = 90.00°, β = 112.922(5)°, γ = 90.00°, V = 4852.2(3) Å 3 , and Z = 4. The complex was characterized by single crystal and powder X-ray diffraction, elemental analysis (EA), and Fourier transform infrared (FT-IR) and luminescence spectroscopy. The luminescence properties of a powder sample of 1 were studied at room temperature and the luminescence lifetime and total quantum yield (QY) were determined.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Min Zhang,Miao Qiu,Zengkun Li,Rui Xu,Yao Wang,Wei Wang,Christopher D. Snow,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
Protein crystals have advantageous properties as framework materials, such as porosity and organized, high-density functional groups with the potential for guest specificity. Thus, protein crystal materials open up vast opportunities for fluorescent species doping and drug sensing. In this work, we explore this frontier by combining two lanthanide complexes with hen egg white lysozyme (HEWL) and directly obtaining co deposited structures in one step using an anti-solvent method different from the previous two-step method. Cross-linking of the protein was achieved using glutaraldehyde, ensuring the stability of the assembly in diverse solvent environments. The use of glutaraldehyde achieved protein cross-linking, ensuring the stability of the components in various solvent environments, including no leakage of fluorescent substances in ultrapure water and anhydrous ethanol. Differential fluorescence quenching effects of amino acids on the two doped luminescent complexes were observed. Introduction of amino acids, varying in concentration and type, resulted in distinct fluorescence enhancement or quenching effects on the protein assembly loaded with the complexes, and the detection results are reflected through different fitting equations and parameters. By exploring the application of this hybrid material for amino acid detection, this work lays the groundwork for broader applications.
研究领域:
生物化学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Furan Zou,Huaxu Ling,Lei Zhou,FangFang Wang,Ying Li
Herein, we demonstrate a successful preparation method of ionic liquid functionalized POSS hybrids by quaternization of imidazole salt with Octa-(ɤ-chloropropyl) POSS. A novel photofunctional hybrid soft material POSS- min-[Eu(tta) 4 ] (tta:2-thenoyltrifluoroacetone) was reported via an ion-exchange reaction between imidazolium-based POSS(POSS-min-Cl) and lanthanide complex [Eu(tta) 4 ] - . The obtained hybrids were extensively characterized by FT-IR, 1 HNMR, 13 CNMR, UV–Vis, PL and TGA in detail. What's more, POSS-min-[Eu(tta) 4 ] displays higher fluorescence intensity , longer lifetime and higher thermostability than corresponding pure complex. More significantly, POSS-min-[Eu(tta) 4 ] exhibits the improvement of photo physical properties (ƞ = 53.73 %) and is selected as the representative sample to examine the potential fluorescence sensing of metal cations. The hybrid POSS-min-[Eu(tta) 4 ] has selective fluorescent quenching effect for different metal ions, especially for Cu 2+ . These results provide meaningful data for the multi-component assembly and responsive luminescent of photo functional hybrids based on modified ionic liquid and lanthanide, which can be expected to have potential application in organic light-emitting devices(OLED) or sensor.
研究领域:
材料科学
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化学传感器
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光学材料
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 84
·68781-68787
·
IF 3.84
Hongliang Tan,Qian Li,Chanjiao Ma,Zhang-Hui Lu,Zheng Fu,Fugang Xu
In this study, the effects of surfactants with different characteristics on the morphology and fluorescent properties of biomolecule-based lanthanide coordination polymers were investigated using Phe/Tb CPs (Phe = phenylalanine) as a model. In the presence of surfactants, significant changes in the morphologies of Phe/Tb CP can be observed, which are highly dependent on the charged characteristics and alkyl chain length of the surfactants. Compared with the anionic SDS, CTAB carrying positive charge and PVP with a super-long alkyl chain are favorable for the formation of monodispersed Phe/Tb CPs that are smaller in size and more uniform. This is due to the fact that the binding ability and steric effect of SDS to growing Phe/Tb are weaker than that of CTAB and PVP. Moreover, a significant increase in the fluorescent intensity and emission lifetime of Phe/Tb CPs were also found after the addition of surfactants, which indicate the influence of surfactants on the fluorescent properties of Phe/Tb CPs. We believe that the present study may be helpful for the rational design and preparation of functional fluorescent biomolecule-based LnCPs for biomedical applications.
研究领域:
材料科学
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生物化学
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产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 23
·13048-13053
·
IF 3.049
Xuan Hu,Fengyi Wang,Qianqian Peng,Jing Hu,Huaqiao Peng,Lin Li,Baozhan Zheng,Juan Du,Dan Xiao
A highly sensitive and selective luminescent sensor for the detection of methyl parathion (MP) pesticide was described in this study. The target molecule HL was synthesized by modifying the structure of 4-hydroxybenzlidene imidazolinone (HBI) with nitrogen-containing heterocyclic 1,10-phenanthroline. In the presence of Eu3+, a HL–Eu3+ complex was formed which could emit strong red fluorescence due to the removal of coordinated water molecules and an intramolecular energy transfer from HL to Eu3+. Addition of MP into the strongly fluorescent solution of HL–Eu3+ induced quenching of the complex's fluorescence, and this quenching behavior occurred because of the competition coordination of MP and HL for Eu3+. A calibration curve was developed that related the extent of fluorescence quenching to MP concentration, making the HL–Eu3+ system a sensitive and selective fluorescent sensor for MP. Under the experimental conditions, the detection limit for MP was down to 95 nM based on LOD = 3σ/S. Moreover, the fluorescence assay developed here allowed the detection of MP in two different types of real samples including pond water and pear juice, and satisfactory results demonstrate that this fluorescent sensor based on HL–Eu3+ has potential application in environment and food analysis.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yu Kang,Ludi Wang,Yaoyang Liu,Runquan Shi,Xiaoyan Tang,Li Wang
Efficient and selective sensing of lanthanides are crucial for identifying valuable lanthanide streams and designing effective extraction/masking agents for mining and nuclear waste management. Luminescence-based sensing often struggles with interference from water molecules. Common approaches to improve emissive lanthanide complexes in water involve increasing ligand lipophilicity and enclosing the emitting metal center. Herein, we have demonstrated that lipophilic ligands do not always lead to higher emissions. When strong coordinating groups are involved in the ligand, the complex may adapt special architecture to compensate the hydrophilic nature of the ligand by creating lipophilic microenvironment and lead to higher emissions. Our findings highlight the importance of the overall lipophilicity of both the ligand and the final complex, which could serve as important reference for future design of efficient lanthanide sensing and emissive complexes.
研究领域:
化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 32
·11110-11118
·
IF 7.059
Dong Mo,Zhengqiang Wang,Kaiyao Sun,Xiyue Xie,Jixi Zhang,Kaiyong Cai
The photoluminescence stability of lanthanide complexes (Lnx) in biological media is of the utmost significance for the construction of optically encoded nano-on-microbeads in multiplex bioassays. Herein, we propose a new type of encoding guest consisting of MOF@MOF nanohybrids, where isomorphic ZIF-8 and ZIF-90 were employed as the core and shell domain, respectively, to separately modulate the hosting and the protection of the inner Lnx guests. Especially, the thin ZIF-90 shell epitaxially grown on the ZIF-8 core was employed as an intermediate layer to facilitate surface covalent fluorination via an aldehyde ligand. Thereby, a superhydrophobic surface was obtained, which led to strong water-resistance of the hybrid nanoparticles, stable host–guest structure, and high quantum yields (19.1%) in biological media. A coating layer of a surface active polymer (polydopamine, PDA) was utilized to conjugate the MOF nanoparticles on polystyrene microspheres for building the second-level host–guest architecture of 3D core–satellite pluralistic hybrids. Finally, single/dual-color encoded beads (EBs) were obtained by altering the ratios of the hybrid MOF guests emitting at different wavelengths. As a proof of concept, the detection of a model tumor marker (alpha-fetoprotein, AFP) was successfully performed using the encoded beads. These findings can pave the way for the rational design of core–shell MOFs and hierarchical structures with high synergy and excellent flexibility toward stable photoluminescence of lanthanide complexes in bioassays.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yong-Mei Wang,Ying Xu,Zhong-Rui Yang,Xinxin Zhang,Ying Hu,Rusen Yang
Multifunctional materials used for multimodal sensors are of great significance both for enriching variety of materials and overcoming the shortcomings of traditional single signal sensors. This work reports the ultrafast preparation of multifunctional coordination polymer (CP) spheres with metalloligand Ru (II)[4,4′-(COOH) 2 -bpy] 3 ▪Cl 2 ( L ) and Gd 3+ ions. Gd- L CPs were used for multi-modal detection of nitroaromatic explosives and trace water in organic solvents with their red fluorescence and magnetic resonance response. The red fluorescence was derived from the ligand, which is electron-rich because of the bipyridine rings. There were different emission behaviors when Gd- L CPs reacted with nitroaromatic explosives that have various electron-deficient properties through electron transfer donor–acceptor mechanism. The changes in the emission depended closely on the nitroaromatic explosives ability to withdraw electrons. Gd- L CPs also showed magnetic resonance response with r 1 of 12.1 mM −1 s −1 due to the integration of the paramagnetic property of Gd 3+ ions. Smart sensing of trace water in organic solvents was achieved by magnetic signals. The fluorescence of Gd- L CPs was enhanced and there was a tiny blue-shift in protonic solvents with increased polarity. The fluorescence sensor used in detecting trace water had a consistent result like the MR response. Thus, Gd- L CPs enabled the use of fluorescence and magnetic resonance sensors simultaneously for the first time to overcome the shortcoming of single modal sensor and expand the application of magnetic resonance relaxation.
研究领域:
材料科学
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化学传感
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiangqian Li,Jiapei Gu,Zhan Zhou,Lufang Ma,Yiping Tang,Jinwei Gao,Qianming Wang
The generation of novel optical sensing structures through the lanthanide coordination has been a key scientific endeavor. The design of molecular indicator for chemical response is derived from the assembly of a polymeric-based ternary europium (III) complex system (Eu(NTA) 3 L/PVA (NTA = 4,4,4-trifluoro-1-(naphthalen-2-yl)butane-1,3-dione, L = 2-(4-(4-(allyloxy)phenyl)-6-(pyridin-2-yl)pyridin-2-yl)pyridine, PVA = poly(vinyl acetate)). The electrospinning technique has been employed to create a nanometer scale membrane and this functional film with ultrafine fibers (diameter of about 110 nm) exhibits intense red light at 618 nm under ultra-violet excitation of 340 nm. The luminescent signal transduction involves the interaction of hydrogen chloride (HCl) with the organic ligand. The strong acidity of the analyte induces dissociation of complex network and the evolution of emission from red to blue has been observed. The fabricated nanosensor demonstrates rapid response time (<2 s) and the detection limit has been calculated to be 3.0 ppm. This effective strategy for achieving lanthanide complex-encapsulated polymer fibers will contribute to the development of new intelligent photonic devices.
研究领域:
材料化学
·
分析化学
·
纳米科技
·
光子学
·
功能材料
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Qin Wen,Jinglian Yang,SongRu Li,Jinwei Gao,Xubing Lu,Qianming Wang
Based on lanthanide optical materials, flexible and transparent luminescent films have been fabricated based on self-cracking micro-pattern on polydimethylsiloxane (PDMS) substrates. The morphology and photoluminescence were studied based on the self-assembly structures. The corresponding intra-molecular energy transfer and photophysical properties were evaluated. Results demonstrated that both lanthanide complex and phosphors could be well controlled and stamped onto the designed cracking micropatterns with red or green emissions. The effects of pH value changes on the luminescent features of the films, as well as its influence on europium complex have been extensively studied. Investigation on transmittance and mechanical properties indicated that the optical and structural quality of such functional films will be potentially useful in the novel design of light-emitting devices or for sensing applications.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 20
·6077-6085
·
IF 7
Jun Wang,Qianbo Zhang,Zhiming Chen,Xin Lan,Wenjing Shi,Zhiqiang Li
Developing lanthanide(III) ion (Ln3+) coordination complexes to mimic sunlight and achieve dynamic anti-counterfeiting is cutting-edge research, but it remains a significant challenge for luminescence color tuning and advanced information handling. Herein, a precisely designed ligand (TL) displays controllable monomers and excimers in different environments, resulting in the colorimetric properties of Ln3+ complexes (TL-Eu/Tb). When the sensitizer resides in the dimeric state, only TL-Eu gives strong luminescence, including outstanding WLE. Instead, in the monomeric state, TL-Eu/Tb emits red/green luminescence, and Eu3+/Tb3+ co-doped films demonstrate tunable luminescence properties and satisfactory WLE (CIE coordinates of (0.33, 0.33)) can be obtained from a customized film with a 1 : 9 (Eu3+/Tb3+) molar ratio. Interestingly, the resulting WLE materials could be utilized in the preparation of white light-emitting-diodes (WLEDs) with superior color quality and have shown potential for advanced anti-counterfeiting applications due to their multi-stimuli responsiveness. This work provides a promising strategy for fabricating smart materials that utilize the controllable aggregation of sensitized ligands.
研究领域:
材料科学
·
光学
·
化学
✓ 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）