JOURNAL OF FLUORESCENCE
·
2016
·Vol. 26
·期 3
·977-985
·
IF 1.601
Geng Tong-Mou,Wang Xie,Jiang Hui,Song Wan,Ni Ruo-Fan,Chen Jian,Wang Yu
An acrylic monomer bearing xanthene group, N-oxethyl acrylate-N′-rhodamine B hydrazide (ARBHE) was synthesized from N-hydroxyl ethyl-N′-rhodamine hydrazide (RBHE) and acryloyl chloride (Ac) in the presence of triethylamine in dry dichloromethane (CH 2 Cl 2 ) at room temperature. The synthesized ARBHE was identified by FTIR, 1 H NMR spectra and elementary analysis. Copolymer poly(AM-ARBHE) of ARBHE and AM was synthesized with thermal initiator by free radical precipitation polymerization and it was characterized by the method of FTIR and 1 H NMR. Its molecular weights (M η ) was 7.03 × 10 3 g mol −1 and the content of rhodamine units in the polymer chains was 1.44 % in mole fraction. The ability of the poly(AM-ARBHE) to detect different metal cations (Ag + , Ba 2+ , Cd 2+ Co 2+ , Cr 3+ , Cu 2+ , Co 2+ K + , La 3+ , Mg 2+ , Na + , Ni 2+ , Pb 2+ , Fe 2+ , Fe 3+ , Hg 2+ and Zn 2+ ) in water was investigated. Upon addition of Cr 3+ , Fe 3+ or Hg 2+ ions to the aqueous solution, visual color change and fluorescence enhancement were observed. Moreover, other metal ions did not induce obvious changes to the fluorescence spectra except to Fe 2+ . The detection limit of poly(AM-ARBHE) was less than 1 × 10 −11 M. The results suggest that this copolymer may offer potential as a polymeric sensor for Cr 3+ , Fe 3+ and Hg 2+ ions in water.
研究领域:
化学传感器
·
材料科学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Min Fu,Xiao-han Jiang,Min Wang,Zhi-ning Fan,Yu-lin Gu,Rui-han Zou,Li-li Zhao,Li Liu
Epithelial barrier impairment of intestinal inflammation leads to the leakage of bacteria, antigens and consequent persistent immune imbalance. Restoring the barrier function holds promise for management of intestinal inflammation, while the theragnostic strategies are limited. In this study, we developed a novel coating by catalase (CAT)-catalyzed polymerization of tannic acid (TA) and combined chelation network with Fe 3+ . TA-Fe 3+ coating was self-polymerized in situ along the small intestinal mucosa, demonstrating persistent adhesion properties and protective function. In enteritis models, sequential administration of TA-Fe 3+ complex solution effectively restored the barrier function and alleviated the intestinal inflammation. Overexpressed CAT in inflammatory lesion is more favorable for the in situ targeting growth of TA-Fe 3+ coating onto the defective barrier. Based on the high longitudinal relaxivity of Fe 3+ , the pathologically catalyzed coating facilitated the visualization of intestinal barrier impairment through MRI. In conclusion, the novel TA-Fe 3+ delivery coating proposed an alternative approach to promote theranostic intervention for intestinal diseases.
研究领域:
药理学
·
生物医学工程
·
胃肠病学
·
分子生物学
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DOI
PubMed
高影响因子
Methods and Applications in Fluorescence
·
2022
·Vol. 10
·期 3
·035004
·
IF 3.849
Linli Xiong,Yong Zheng,Haibo Wang,Jiangyang Yan,Xuguang Huang,Hongyun Meng,Chunhua Tan
A novel fluorescence sensor for successive detection of Cu2+ and Fe3+ based on anti-B18H22 derivative which possesses 5-hydroxyisoquinoline as an ionophore was synthesized via a one-pot and its structure and photophysical properties were characterized by NMR, HRMS, FTIR, UV–vis, PL and theoretical calculation. The fluorophore displays two emission peaks at 460 nm and 670 nm in THF solution coming from the emission of the locally excited state and intramolecular charge transfer fluorescence, respectively. The complex exhibited obvious aggregation-induced emission enhancement (AIEE) characteristics in THF/H2O solution by increasing the aqueous concentration from 70% to 95%. The AIEE molecules showed a high selectivity towards Cu2+ over other metal ions by forming a 2:1 metal-to-ligand complex in THF/H2O (fw = 20%) solution, the fluorescence intensity increased as a linear function of the Cu2+ concentration at 460 nm due to the inhibition of PET effect. The fluorescent emission was quenched linearly by the addition of Fe3+, which provides a method for successive determination of Cu2+ and Fe3+ based on 'off-on-off' fluorescence of the fluorescent. The detection limit of Cu2+ and Fe3+ was 5.7 × 10−6 M and 7.2 × 10−5 M respectively. Morever, a rapid identification of Cu2+ in the aqueous solution by naked eyes can be realized. In addition, the molecules were pH-sensitive, the fluorescence quenching can be observed in strongly alkaline environment. The method has been applied to the determination of copper ions in water samples with satisfactory results.
研究领域:
化学
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材料科学
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DOI
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Yongjie Wang,Qingzhou Bu,Dongshuo Li,Shuai Yang,Li Li,Guotao Xiang,Sha Jiang,Ying Chang,Chuan Jing,Xianju Zhou,Lev-Ivan Bulyk,Andrzej Suchocki
Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) are compact light sources of great interest for NIR spectroscopy applications. Beyond typical Cr 3+ -activated NIR-emitting phosphors, there exists a strong demand for Cr 3+ -free alternatives with high efficiency and broadband emission to rich the landscape of NIR luminescent materials and extend their range of application fields. Here, we report a series of Fe 3+ -activated Ca 3 Ga 2 Sn 3 O 12 garnet-type phosphors exhibiting broadband NIR emission in the 650–1000 nm range attributed to 4 T 1 (G) → 6 A 1 (S) transition, with a maximum at 754 nm and a FWHM of 89 nm upon UV excitation. The spectroscopic results were analyzed according to the Tanabe-Sugano theory from which the crystal field parameter D q and Racah parameters B and C were obtained for the octahedrally coordinated Fe 3+ ion. Notably, the NIR persistent luminescence lasting over 1 h was detected following UV or X-ray irradiation. The possible mechanism involving electron traps was proposed to explain the observed persistent luminescence. Furthermore, a NIR pc-LED was fabricated by coating synthesized phosphor on a UV chip, and its performance was evaluated to assess its potential suitability as a NIR light source. Our discovery of novel type of nontoxic Fe 3+ -activated broadband NIR luminescence phosphors with efficient NIR persistent luminescence paves the way for discovering Cr 3+ -free multifunctional NIR luminescence materials, thereby expanding their application possibilities.
研究领域:
材料科学
·
光学
·
光电子学
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DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 35
·25359-25368
·
IF 3.9
Yajun Jiang,Aolin Wu,Lin Yang,Jun Wu,Yue Liang,Zhigang Hu,Ying Wang
This study explored the preparation of a novel composite hydrogel based on deep eutectic solvent (DES) with lysine (Lys) and its application in pressure sensing and Fe3+ adsorption. DES was synthesized from acrylamide (AM) and urea (U) as hydrogen bond donors (HBD) with choline chloride (ChCl) as hydrogen bond acceptor (HBA), and Lys was used as a functional filler, and Lys/P(AM-U-ChCl) composite hydrogels were successfully prepared by frontal polymerization (FP) method. The structure of the hydrogels was characterized in depth using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The effects of Lys content on the mechanical properties, pH-responsive behavior, pressure-sensitive properties, and Fe3+ adsorption capacity of the hydrogels were further analyzed. It was found that the introduction of Lys significantly improved the compressive and pressure-sensitive properties of the hydrogels. The composite hydrogels exhibited excellent swelling equilibrium rates at different pH values. The capacitance change of the hydrogel with 0.5 wt% Lys at 200 g pressure was 2.12-fold higher than that of the hydrogel without Lys addition, and the adsorption efficiency of the hydrogel for Fe3+ was greatly enhanced. This study provides a new idea for the functionalized design of composite hydrogels and demonstrates their great application prospects in high-performance pressure sensors and heavy metal ion adsorption.
研究领域:
材料科学
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环境科学
·
生物医学工程
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yong Xu,Zihao Li,Xijia Yang,Xuesong Li,Yang Gao,Liying Wang,Wei Lü
Energy storage devices are the core hub in constructing the modern energy system and have become an indispensable factor in driving the development of new electronic devices. In this work, we synthesized a flexible cathode of Fe 3+ intercalated V 2 O 5 ·3H 2 O (VOH) on carbon cloth (FeVOH@CC) and explored an advanced iron ion hybrid supercapacitor (IIHS). The presence of V 4+ /V 5+ electrons in FeVOH@CC enhances the material’s conductivity, while Fe 3+ acts as a stabilizing pillar to accommodate structural expansion and contraction, thereby ensuring improved ion diffusion dynamics and cycling stability. Additionally, the growth of the material directly on the carbon cloth, eliminates the negative effects of conductive agents, binders, and other additives, and the prepared FeVOH@CC maintains structural flexibility, which is crucial for the effective insertion/extraction of Fe 2+ . As a result, the aqueous IIHS exhibits excellent areal capacitance (882.4 mF cm −2 at 1 mA cm −2 ) and energy density (176.5 μWh·cm −2 at 606.4 μW·cm −2 ). After 20,000 cycles, it retains 85.7 % of its capacity, significantly outperforming VOH. Meanwhile, we have developed a polyacrylamide/sodium alginate/glycerol-Fe 2+ gel electrolyte for flexible IIHS, and the device exhibits outstanding performance by retaining 85.9 % of its capacity after 5,000 cycles. Therefore, FeVOH@CC cathode based flexible IIHS opens up new exploratory possibilities for next-generation energy storage devices.
研究领域:
材料科学
·
能源存储
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hanxiao Wang,Zhaotie Liu,Zhongwen Liu,Jinqiang Jiang,Guo Li
An extendable double network design for hydrogels with programmable external geometries and actuating trajectories is presented. Chemically cross-linked polyacrylamide as the first network penetrated with linear alginate chains is prepared for demonstration. The coordination of Fe3+ ions with carboxylate groups in alginate chains acts as the second network, and its dissociation through photoreduction is utilized to realize the photoresponsive shape memory property; the shape fixity ratio and shape recovery ratio both exceed 90%. The gradient dissociation of Fe3+-carboxylate coordination under UV facilitates 3D programming of hydrogel geometry. On another aspect, the resulted cross-linking gradient differentiates the extent and rate of solvent-induced volume change of the PAAm network, endowing the hydrogel with photo-programmable solvent-driven actuating behavior. Furthermore, by inducing the formation of Fe3+-carboxylate coordination within the entire network for shape programming and cross-linking gradients in specific regions as active joints, hydrogels with designed actuating behaviors based on specific 3D shapes are realized. The shape memory and active morphing functionalities enabled by photo-dissociable Fe3+-carboxylate coordination in PAAm hydrogel can be generally extended to other hydrogels.
研究领域:
材料科学
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化学工程
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 104
·期 2
·886-895
·
IF 3.502
Xiaoping Guo,Qiwen Pan,Xiaoqian Song,Qianyi Guo,Shangxiong Zhou,Jianrong Qiu,Guoping Dong
Fluorescent detection is a new spectroscopic measurement for ions sensing due to the advantages of real-time determination with high selectivity, accuracy, and low cost. However, chemosensors based on fluorescent detection are usually determined by absolute intensity from a monochromatic emission signal, which is easy to be fluctuated by the external environment, especially for Fe 3+ detection in complex fluids. Herein, we rationally design a dual-emission Eu 3+ : CDs@ZIF-8 to construct a ratiometric fluorescent sensor with self-calibrating ability for Fe 3+ determination. High efficient carbon dots (CDs) are embedded in europium ions (Eu 3+ )-doped MOF by simple stirring preparation at room temperature. The label-free ratiometric fluorescent probe (I CDs@ZIF-8 /I Eu ) exhibits simultaneous blue and red emission under the same excitation at 365 nm. Remarkably, Eu 3+ : CDs@ZIF-8 displays the superiority of high selectivity to Fe 3+ , which shows ratiometric fluorescence characteristics (I 0 /I) in a range of 0-6 μmol\L with a low limit of detection (LOD) of 0.897 μmol\L. Besides, the CDs-MOF nanocomposite holds good aqueous dispersibility and low cytotoxicity, which shows great potential applications in medical aid including biological detection and clinical diagnosis.
研究领域:
分析化学
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材料科学
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生物医学工程
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2020
·
IF 3.306
Xiaoye Wen,Li Yan,Zhefeng Fan
A novel and simple probe (denoted LN-1) with AIE property based on malononitrile and 4-diethylaminobenzaldehyde was designed and synthesized. The use of two different mechanisms for the independent detection of Fe 3+ and CN − is more convenient and efficient than the continuous detection of anions and cations. The detection mechanism was verified by mass spectrometry (MS), nuclear magnetic resonance (NMR) spectrum, and particle size distribution. Under optimized experimental conditions, excellent calibration curves were obtained for the LN-1-Fe 3+ and the LN-1-CN − with detection limits of 0.17 and 0.39 μM, respectively. This method was successfully applied to detect the content of Fe 3+ and total inorganic iron in actual samples. Owing to its low cytotoxicity, good biocompatibility, and enhanced orange emission in aqueous solution, the LN-1 was successfully applied for CN − imaging in live cells. In addition, Fe 3+ and EDTA incorporation into the LN-1 changed the fluorescent intensity, which is beneficial in constructing ultrasensitive INHIBIT logic gate.
研究领域:
分析化学
·
生物医学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2018
·
IF 2.732
Xiaofei Gu,Xiuxuan Zhang,Zhe Liu,Yu Cheng,Fulong Ma,Yanpeng Dai,Tianzi Xue,Yu Zheng,Zhengjian Qi
A novel near-infrared fluorescent probe RHCC was devised and synthesized. It exhibits high specificity to Fe 3+ compared to other metals in aqueous solutions. The detection limit of RHCC was 1.2 × 10 −7 M and the complexation stability constant was 5.807 × 10 4 M −1 . The binding ratio of RHCC and Fe 3+ was 1:1 which was measured through MS, FTIR and Job's plot. The energy gap between HOMO and LUMO of RHCC was 3.22 eV, while RHCC- Fe 3+ complex was 0.95 eV. This result means the binding of probe RHCC and Fe 3+ lowers the RHCC- Fe 3+ complex's energy gap and makes it more stable. What's more, in living cells and zebrafishes studies, probe RHCC was no significant cytotoxic effect, indicating it could monitor Fe 3+ in biological system.
研究领域:
分析化学
·
生物医学
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产品关联
DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 24
·7421-7431
·
IF 4.019
Wanyu Zhang,Lihua Jia,Xiangfeng Guo,Rui Yang,Yu Zhang,Zhenlong Zhao
Carbon dots (CDs) are a developing stable, conductive, and environmentally friendly fluorescent nanomaterial with potential applications in biomedicine and sensing. In this study, CDs with up- and down-conversion photoluminescence characteristics were prepared via a one-pot hydrothermal method using coffee beans as the sole raw material. Fourier transform infrared spectra and X-ray photoelectron spectroscopy showed the presence of nitrogen and oxygen functional groups on the CDs surfaces. Transmission electron microscopy showed that the CDs were spherical with an average size of 4.6 nm. The CDs precursor and synthesis process are environmentally benign, and the resulting CDs exhibit excellent photostability, reversible fluorescence response to temperature, and good ionic-strength tolerance. Moreover, these CDs can be used as efficient fluorescence probes in selective and sensitive Fe3+ detection by a dual-readout assay. The down- and up-conversion fluorescence measurements from the CDs were in the linear range for 0–0.10 mM Fe3+ with the detection limits of 15.4 and 16.3 nM, respectively. Furthermore, the CDs were successfully applied to intracellular sensing and imaging Fe3+ ions, indicating their potential use in bioscience applications.
研究领域:
材料科学
·
生物医学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 48
·5851-5858
·
IF 2.896
Yan Guan,Xiao-Lan Zhao,Qiu-Xia Li,Long Huang,Jian-Mei Yang,Tong Yang,Yun-Hui Yang,Rong Hu
In this paper, a novel colorimetric strategy based on iodide ion (I−) and Cu-MOF catalysis was developed for simple, low-cost, and naked-eye detection of Fe3+. Both I− and MOFs display catalytic activity toward peroxidase substrate 3,3′,5,5′-tetramethylbenzidine (TMB). Adsorption and embedding of I− in Cu-MOF generates Cu-MOF/I with a three-dimensional porous structure that exhibits higher specific surface area, providing more active sites to facilitate interaction with TMB, resulting in enhanced catalytic efficiency. Reports have shown that Fe3+ can oxidize TMB in the absence of H2O2. We found that as Fe3+ concentration increases, the color of the system gradually deepens and the UV absorption peak gradually increases, thus providing a colorimetric sensor for quantitative Fe3+ detection. The detection limit (LOD) obtained in the presence of I− is 200 nM; however, in the absence of I−, the LOD is approx. 10 μM. Thus, the sensing system is ideal for signal amplified analysis of Fe3+. In the presence of various interfering metal ions, the developed sensing system displays excellent selectivity. Additionally, the practical application to Fe3+ detection in real samples is explored.
研究领域:
分析化学
·
材料科学
·
纳米技术
·
环境科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）