MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Hui Zhang,Jingqi Wang,Dejin Lin,Linfan Wang,Jiale Chen,Junjie Pan,Xiaofei Wang,Da Chen
The increasing persistence of harmful ions and pesticide residues has been a matter of concern due to their pernicious and ubiquitous impact on environmental processes. Herein, we design a ratiometric fluorescent platform for the cascade identification of Cu 2+ and glyphosate, which is devised by grafting rhodamine 6G onto F, N-doped carbon dots (F, N-CDs@Rh6G). The formation of F, N-CDs@Rh6G/Cu 2+ chelation complex induces fluorescence quenching at 438 nm, attributed to static complex formation and photoinduced energy transfer. Subsequently, the introduction of glyphosate reverses the binding priority of the chelated complex and results in the recovery of fluorescence signal at 438 nm, while the reference peak (558 nm) remains relatively stable. Under optimal conditions, the fluorescent probe exhibits the low detection limits (LODs) for Cu 2+ (61 nM) and glyphosate (53 nM). Additionally, a portable microcavity sensing platform combining with smartphone is devised for visual and on-site quantification of Cu 2+ and glyphosate with the exceptional LODs. Therefore, this newly microcavity with F, N-CDs@Rh6G provides a reliable cascade sensing platform for Cu 2+ and glyphosate determination, showcasing potential applications.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Tian Zhang,Zhiwen Gan,Shujun Zhen,Yongmei Hu,Xiaoli Hu
L-glutathione (GSH) which has reducibility and integrated detoxification plays an important role in maintaining normal immune system function. Its abnormal levels are relevant to some clinical diseases. In this work, a facile ratiometric fluorescence sensor for GSH was designed based on MnO 2 nanosheets, Thiamine hydrochloride (VB 1 ) and Rhodamine 6G (R6G). VB 1 could be oxidized into fluorescent ox-VB 1 due to the strong oxidizing property of MnO 2 , and MnO 2 nanosheets simultaneously could quench the fluorescence of R6G based on the inner filter effect (IFE). MnO 2 could react with GSH to form Mn 2+ , which caused its losing oxidizing property and quenching capacity. According to this principle, the concentration of ox-VB 1 diminished, resulting in its fluorescence intensity decreasing at 455 nm and the fluorescence of R6G recovering at 560 nm. Under optimal conditions, the VB 1 -MnO 2 -R6G detection system showed a wide linear range towards GSH in the range of 1.0–300.0 µmol L −1 with a low detection limit reaching 0.52 µmol L −1 . Furthermore, the method was also applied in the determination of GSH in human serum.
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PubMed
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Yanhong Chao,Jingyu Pang,Yan Bai,Peiwen Wu,Jing Luo,Jing He,Yan Jin,Xiaowei Li,Jun Xiong,Huaming Li,Wenshuai Zhu
A novel dendritic silicon dioxide nanocomposite coated with a highly dispersed graphene-like boron nitride nanosheet ( g -BN(x)@SiO 2 ) was in-situ synthesized and employed as a solid-phase extraction material for the Rhodamine B (RhB) and Rhodamine 6G (R6G) enrichment in food samples prior to their quantitation by HPLC. The structures and morphologies of g -BN(x)@SiO 2 were characterized by XRD, FTIR, BET and TEM. The adsorption performance and mechanism were investigated and showed an enhanced maximum adsorption capacity of 625 mg/g for RhB on the nanocomposite loaded with 1% of g -BN via a fast, spontaneous process. Under optimal extraction conditions, this method showed low detection and quantification limits (2.8 μg/L for RhB, 2.1 μg/L for R6G and 9.2 μg/L for RhB, 6.9 μg/L for R6G, respectively), good repeatability (RSD% <3.7%), and satisfactory spiked recoveries of 94.8%–103.1% for RhB and R6G in real chili powder and beverage. Therefore, the g -BN(1%)@SiO 2 -based materials possess significant potential.
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PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Wenbo Lv,Yafang Song,Ruibin Guo,Nijuan Liu,Zunli Mo
As a water pollutant with excellent solubility, 2,4,6-trinitrophenol (also known as picric acid, PA) poses a potential threat to the natural environment and human health, so it is crucial important to detect PA in water. In this study, a novel composite material (MIL-53(Al)@R6G) was successfully synthesized by encapsulating Rhodamine 6G into a metal-organic frame material, which was used for fluorescence detection of picric acid (PA) in water. The composite exhibits bright yellow fluorescence emission with a fluorescence quantum yield of 58.23 %. In the process of PA detection, the composite has excellent selectivity and anti-interference performance, and PA can significantly quench the fluorescence intensity of MIL-53(Al)@R6G. MIL-53(Al)@R6G has the advantages of fast detection time (20 s), wide linear range (1–100 µM) and low detection limit (4.8 nM). In addition, MIL-53(Al)@R6G has demonstrated its potential for the detection of PA in environmental water samples with satisfactory results.
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PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 28
·9011-9020
·
IF 7.393
Jiangcai Wang,Cuicui Qiu,Hua Pang,Junyu Wu,Mengtao Sun,Dameng Liu
The ultrasensitive surface-enhanced Raman spectroscopy (SERS) detection of trace organic pollutants is an important issue in environmental protection. However, the SERS detection performance easily suffers from poor sensitivity and reproducibility due to the limitations of materials. A high-performance substrate is necessary to control the plasmonic hotspots in a wide spectral range. In this work, a perovskite quantum dot–graphene/nano-Au (PQD–G/Au) composite was designed using the combination of ligand-assisted reprecipitation and spinning coating techniques. The SERS performance of PQD–G/Au composites showed a strong dependence on their synthesis parameters, which was proved by the finite-difference time-domain program simulation. An excellent SERS detection behavior was obtained on the PQD–G/Au composite for rhodamine 6G (R6G) and p-nitrophenol (PNP) with a large linear detection range (10−12 to 10−6 M for R6G and 10−8 to 10−4 M for PNP) and a low detection limit (6.02 × 10−13 M for R6G and 2.95 × 10−9 M for PNP). The superior SERS performance was attributed to the synergistic effect of the electromagnetic enhancement of Au nanostructures and chemical enhancement of PQD–G heterostructures. The proposed method paves a new practical application of other 2D materials and heterostructures for designing a novel PQD-based SERS substrate.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 37
·50949
·
IF 3.125
Fan Kong,Xueli Jia,Shuting Zhang,Mengqi Lin,Yu Cheng
We have synthesized an amphiphilic block copolymer poly(N-isopropylacrylamide)- b -poly(N-vinylcarbazole) containing 1,8-naphthalimide and spirolactam rhodamine 6G moieties via reversible addition-fragmentation chain transfer radical polymerization. The photoluminescence (PL) spectrum of the poly(N-vinylcarbazole) block well matches the absorption spectrum of the 1,8-naphthalimide moiety and the enhanced emission with a peak at 510 nm from the 1,8-naphthalimide moiety is found in the block copolymer film for excitation at 330 nm. The 560-nm emission from the rhodamine 6G moiety is observed as the block copolymer film sprayed by Britton-Robinson (B-R) buffers or Fe 3+ aqueous solutions for excitation at 330 and 400 nm. The PL intensity at 560 nm is markedly increased for the pH value of the B-R buffer lower than 3.0 or the Fe 3+ concentration in water higher than 5 × 10 −4 M. The 560-nm PL intensity is much higher for the block copolymer film photoexcited at 330 nm than that photoexcited at 400 nm due to double-step resonance energy transfer. The PL intensity ratio of 560 to 510 nm (I 560 /I 510 ) is dependent on the resonance energy transfer from 1,8-naphthalimide to rhodamine 6G, which is sensitive to the concentrations of H + and Fe 3+ ions in water.
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高影响因子
SPECTROSCOPY LETTERS
·
2025
·
IF 1.6
Shuaibin Wu
In this study, a novel surface enhanced Raman scattering (SERS) substrate material was designed and prepared for the real-time Rhodamine 6 G SERS detection. Firstly, ZIF-67 was modified on the surface of polypropylene membrane by in-situ growth methods. Subsequently, the pre-prepared Ag nanoparticles were modified on the surface of the polypropylene membrane through the covalent reaction. The result of scanning electron microscopy characterization showed that Ag nanoparticles was modified on the surface of ZIF-67 through simple electrostatic adsorption and the chemical reaction of the Ag-S bond; The infrared characteristic peaks of ZIF-67, as well as the x-ray diffractometer and x-ray photoelectron spectrometer characteristic peaks of ZIF-67 and Ag nanoparticles could all be identified. On the other hand, based on this material, we have investigated the feasibility of conducting real-time SERS detection under optimized conditions when the sample was in a flowing situation. The experimental results showed that the SERS detection of Rhodamine 6 G could be completed within 15 min in the mode of real-time, with an relative standard deviation of 10.67%. The concentration of Rhodamine 6 G and the intensity of the SERS signal also have a good linear relationship within the range of 103, 5 × 102, 2.5 × 102, 25 and 10 μmol/L.
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高影响因子
ACS Omega
·
2024
·
IF 3.7
Yun-qiong Yang,Yuan Zhang,Yang Liu,Feier Lin,Hao Zhang
The construction of tunable white-light-emitting materials has garnered increasing attention in the scientific community. In this study, N-doped carbon dots (N-CDs) were surface-modified with carboxylatopillar[5]arene (CP[5]) using an EDC–NHS coupling reaction to create CCDs. CCDs were then conjugated with rhodamine 6G (R6G) through host–guest interactions to fabricate the CCDs–R6G composites. These composites produced two-color fluorescence emission peaks at 447 and 557 nm when excited by a wavelength of 340 nm. Excitingly, white-light emission (0.28, 0.30) can be readily achieved by varying the R6G concentration. To further explore potential applications, a new detection method for rutin (RT) based on the inner filter effect (IFE) was developed. Experimental results verify the practicality and reliability of the fluorescence sensor based on CCDs–R6G composites for RT detection in real samples.
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PubMed
高影响因子
Analytical Methods
·
2023
·Vol. 16
·期 3
·411-419
·
IF 3.1
Xiaohui Ren,Xinyue Song,Lili Wang,Wenjie Ma,Xin Li
The reliable and accurate detection of unauthorized additives in food is significant to prevent health risks. In recent years, surface-enhanced Raman spectroscopy (SERS) with fast, simple, and sensitive capabilities has been widely used for food safety analysis. In order to detect illegally added dye molecule rhodamine 6G and small molecule melamine in food, we have proposed a fast, convenient, and label-free SERS detection technology using flower-like Ag/ZnO as the SERS substrate. The structure and morphology of the flower-like Ag/ZnO were characterized by scanning electron microscopy, energy dispersive spectrometery, transmission electron microscopy, and X-ray diffraction analysis. We investigated the SERS effect and sensitivity of flower-like Ag/ZnO toward rhodamine 6G and melamine. The synergistic effect of flower-like Ag/ZnO provides high SERS activity for the detection of rhodamine 6G and melamine at the lowest detection concentrations of 0.5 ng mL−1 and 1.0 ng mL−1, respectively. Therefore, flower-like Ag/ZnO with good sensitivity and uniformity has potential for improving the detection of illegal food additives.
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高影响因子
Analytical Methods
·
2015
·Vol. 7
·期 6
·2738-2746
·
IF 1.821
Zhao Wang,Zhongkui Yang,Tao Gao,Jingwen He,Laijiang Gong,Yanbing Lu,Yuanqin Xiong,Weijian Xu
We report on the fabrication of an amphiphilic block copolymer-based colorimetric and fluorescent chemosensor for Hg2+ ions that was prepared by sequential RAFT polymerization of N-isopropylacrylamide (NIPAM) and a novel rhodamine-based Hg2+-recognizing monomer, R6GDM. Because of its amphiphilic properties, the block copolymer P[NIPAM]-b-P[R6GDM] can self-assemble into micelles, which allows it to be used as a chemosensor in aqueous solution. Upon addition of Hg2+ ions to the micelle solution, visual color change and fluorescence enhancement were observed. Moreover, it exhibits high sensitivity and selectivity for Hg2+ ions, relatively. Besides, it can serve as a potential multifunctional sensor to pH and temperature (in a specific temperature range: 25–40 °C or 40–52 °C). The water dispersibility and biocompatibility of these polymer micelles could provide a new strategy for detecting analytes in environmental and biological systems.
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高影响因子
CARBON
·
2025
·
IF 11.6
Yuxin Zheng,Kamile Arkin,Yuting Xu,Xue Jiang,Ning Xu,Qingkun Shang
In this paper, we successfully designed and constructed a ratiometric room temperature phosphorescent probe (CDs@SiO 2 –Rh6G) that can realize highly sensitive detection of nitrite in urine under the interference of ascorbic acid (AA) based on the triplet-to-singlet Fӧrster resonance energy transfer mechanism between silica-coated phosphorescent carbon dots and rhodamine 6G. This unique energy transfer mechanism is discussed in detail, and the interference of various factors on nitrite detection is systematically investigated. With the successful masking of AA by 4-hydroxy-2,2,6,6-tetramethylpiperidinooxy (4-OH-TEMPO), CDs@SiO 2 –Rh6G could accurately detect NO 2 − with a limit of detection (LOD) as low as 0.242 μmol/L, which is much lower than that of the commercially available urinary nitrite test paper. The probe was tested on real urine samples—human, dog, and cat urine—and the results were highly consistent with those obtained by ion chromatography, with spike recoveries ranging from 96.5 % to 105.3 %. Since the green and yellow luminescence of the probe is visible to the naked eye, a visual analysis method based on the RGB values of smartphones was developed. This study presents a new strategy for constructing ratiometric room temperature phosphorescent probes based on a unique TS-FRET mechanism. Meanwhile, this research not only overcomes the quantitative limitations of current test strip detection methods but also lays the foundation for developing more sensitive and accurate clinical diagnostic tools for urinary tract infections.
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高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2016
·Vol. 39
·期 12
·2422-2430
·
IF 2.741
Jin Xie,Jie Xie,Jian Deng,Xiangfang Fang,Haiqing Zhao,Duo Qian,Hongjuan Wang
A novel core–shell magnetic nano-adsorbent with surface molecularly imprinted polymer coating was fabricated and then applied to dispersive micro-solid-phase extraction followed by determination of rhodamine 6G using high-performance liquid chromatography. The molecularly imprinted polymer coating was prepared by copolymerization of dopamine and m -aminophenylboronic acid (functional monomers), in the presence of rhodamine 6G (template). The selection of the suitable functional monomers was based on the interaction between different monomers and the template using the density functional theory. The ratios of the monomers to template were further optimized by an OA 9 (3 4 ) orthogonal array design. The binding performances of the adsorbent were evaluated by static, kinetic, and selective adsorption experiments. The results reveal that the adsorbent possesses remarkable affinity and binding specificity for rhodamine 6G because of the enhanced Lewis acid-base interaction between the B(Ш) embedded in the imprinted cavities and the template. The nano-adsorbent was successfully applied to dispersive micro-solid-phase extraction coupled to high-performance liquid chromatography for the trace determination of rhodamine 6G in samples with a detection limit of 2.7 nmol/L. Spiked recoveries ranged from 93.0–99.1, 89.5–92.7, and 86.9–105% in river water, matrimony vine and paprika samples, respectively, with relative standard deviations of less than 4.3%.
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高影响因子
危险品化学品经营许可证（带存储）