Journal of Applied Spectroscopy
·
2017
·Vol. 84
·期 5
·900-905
·
IF 0.572
Zhao Zh.,Sheng L.,Su B.,Tao C.,Jing W.
The interaction between rhodamine 6G (Rh6G) and cerium sulfate was studied by the fluorescence quenching method. In a sulfuric acid medium, the interaction of Ce(IV) with Rh6G results in Rh6G fluorescence quenching. The maximum excitation wavelength (λ ex ) and the maximum emission wavelength (λ em ) are 530 nm and 555 nm, respectively. A good linearity between the relative fl uorescence intensity (ΔF) and Ce(IV) was observed in the range ~0.12–1.08 μg/mL. The detection limit was 1.4 × 10 –3 μg/mL. The optimum reaction conditions, influencing factors, and effect of coexisting substances were investigated in the experiment. We found that the concentration of Rh6G was 3.2 × 10 –6 mol/L, and the fl uorescence intensity was maximum.
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JOURNAL OF NON-CRYSTALLINE SOLIDS
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2017
·
IF 2.124
Jungang Cao,Haibao Lu,Min Yang,Qun Wang,Zhonglin Wei,Jianjun Li
Photoluminescence properties of Rhodamine 6G dye confined in electrospun silica fiber are investigated in this manuscript. Uniaxial tensile test and environmental stability of such hybrid fibers are examined. Homogeneous distribution of Rhodamine 6G in silica fibers is confirmed by fluorescence image. Only J-type dimers are confirmed in our electrospun Rh6G/SiO 2 hybrid fibers, and the increase of the Rh6G concentration gives rise to a progressive red shift and a broadening in the maximum emission spectra. The emission intensity of electrospun hybrid fibers can be sensitive to the temperature and the relative maximum emission intensity may decrease gradually in the whole measured temperature range.
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LUMINESCENCE
·
2021
·Vol. 36
·期 5
·1300-1305
·
IF 2.464
Dunli Liu,Qiuyun Wang,Anmin Chen,Qingyi Li,Laizhi Sui,Mingxing Jin
Fluorescence quenching of rhodamine 6G by graphene oxide (GO) was investigated using steady-state fluorescence spectroscopy and ultrafast time-resolved absorption spectroscopy. The steady-state fluorescence spectra showed that rhodamine 6G fluorescence was effectively quenched by titrating the GO to the rhodamine 6G solutions. For lower GO concentrations, transient dynamic curves followed two-exponential decay parameters. For higher GO concentrations, the dynamic curves could not be fitted well, and three-exponential decay parameters were appropriate. The results indicated that there was a new transition process (electron transfer) in the exited rhodamine 6G and GO solution.
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RSC Advances
·
2021
·Vol. 11
·期 36
·22390-22397
·
IF 3.361
Zixiang Qu,Chuane Wang,Hongdong Duan,Liqun Chi
A mercury ion sensitive fluorescent functional monomer was synthesized based on rhodamine 6G, and two highly-effective approaches about the research and development of novel macroscopic hydrogel sensor were reported. The monomer was utilized to synthesize hydrogel sensors by free radical polymerization and guest–host interaction. Hydrogel sensors have prominent selectivity to Hg2+ and can be tailored and reused, which are capable of detecting Hg2+ sensitively in flowing and standing water environment with satisfactory performance. This work is expected to open an avenue to construct novel fluorescent analysis method for Hg2+ detection.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 8
·4633-4640
·
IF 1.674
Cui Chuanfeng,Lei Juying,Yang Lingang,Shen Bin,Wang Lingzhi,Zhang Jinlong
A highly sensitive molecularly imprinted fluorescent sensor for rhodamine 6G (R6G) was fabricated using carbon dot (CD)-embedded mesoporous organosilica as scaffold through a one-pot self-assembly process. The embedded CDs and R6G exhibit efficient fluorescence resonance energy transfer (FRET) due to the overlap between the emission band of energy donor CDs and the excitation band of energy acceptor R6G, as well as their nanometer-sized distance. After acid treatment, molecularly imprinted silica for recognition of R6G with excellent performance in terms of sensitivity and selectivity was obtained, being attributed to the FRET effect between CDs and R6G and the spatial recognition ability for R6G.
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Scientific Reports
·
2016
·Vol. 6
·期 1
·1-7
·
IF 5.228
Wang Zheng,Yang Min,Chen Chao,Zhang Ling,Zeng Heping
An extremely sensitive fluorescence sensor has been developed for selectively detection of mercury ions based on metallophilic Hg 2+ -Au + interactions, which results in an effective release of pre-adsorbed rhodamine 6G (R6G) molecules from the nanoporous gold substrate, associated with a significant decrease of fluorescence intensity. The optical sensor has a detection sensitivity down to 0.6 pM for Hg 2+ and CH 3 Hg + ions, in particular a superior selectivity in a complex aqueous system containing 13 different types of metal ions, meanwhile maintaining a long-term stability after 10 cycles. Such a fluorescence sensor combining multiple advantages therefore present promising potentials in various applications.
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VACUUM
·
2021
·
IF 3.627
Jiacheng Zhu,Li Sun,Yuejin Shan,Yuan Zhi,Jian Chen,Binlin Dou,Wenxian Su
A green and reliable seed-mediated electroless deposition method using the Sargentgloryvine stem extract as reducing and capping agent is explored to prepare silver nanofilms (Ag NFs) as surface-enhanced Raman scattering (SERS) active substrates. The average particle size of Ag NFs can be facilely controlled only by adjusting the amount of AgNO 3 in the growth solution. Furthermore, the SERS properties of Ag NFs are established experimentally and their Raman enhancement mechanism is revealed by means of the scanning electron microscopy and the finite-difference time-domain simulation. It is found that high surface coverage and slight surface agglomeration of Ag NFs are beneficial for the amplification of Raman signal. Optimized Ag NFs display superior sensitivity towards Rhodamine 6G molecules and good reproducibility, indicating potential applications in SERS-based detection and analysis. Meanwhile, the proposed method to obtain Ag NFs provide a promising route for the preparation of other metal nanofilm.
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APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Lijuan Sun,Yichen Zhang,Zhinan Fan,Chi Zhang,Li-Juan Fan
Fluorescence-encoded microspheres are largely demanded in high-throughput assays. A strategy for preparing encoded microspheres based on fluorescence resonance energy transfer (FRET) was advanced. Two fluorophores, poly(phenylenevinylene) nanoparticles (PPV NPs) as the donor and rhodamine 6G (R6G) as the acceptor were employed to construct the energy-transfer pair, and introduced onto the substrate polymeric microspheres. The fluorescence intensity ratio between PPV NPs and R6G molecules were tuned based on energy transfer mechanism. Nine codes (wavelength-intensity combinations) were obtained at the same excitation by keeping the concentration of PPV NPs constant and varying the concentration of R6G in the dipping solutions. Then, a melamine–formaldehyde (MF) resin layer was coated onto the encoded spheres to prevent the leakage of fluorophores. The encoded spheres were found to have good fluorescence stability against various solvents and even “dissociation agent“, and no significant variation of the codes were observed. Further modification of this MF layer with silanization reaction provided the amino reactive sites. In all, this study provides a general strategy for the preparation of fluorescence encoded microspheres based on energy transfer as well as a stable protective layer with reactive sites.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Lu Li,Xin Lyu,Saibo Liang,Zhanfang Liu
Hydrogen peroxide (H 2 O 2 ) is an important oxidant that exists widely in biological systems and the environment, and has been extensively used in medical, environmental, food, and industrial fields. Accurate, rapid, and sensitive detection of H 2 O 2 content is of great significance in the fields of biomedicine, environmental monitoring, food safety, and public safety. In this study, a probe was developed by utilizing Rhodamine 6G (Rh6G), a readily available commercial fluorescent dye, within hollow SiO 2 photonic crystals (HSPCs) to produce an amplified fluorescent signal. Furthermore, I - were incorporated into the system, which can be oxidized to I 2 in the presence of H 2 O 2 . The I 3 - produced can react with Rh6G to form a complex that quenches the fluorescence signal, enabling highly efficient detection of H 2 O 2 . The method does not require complex organic synthesis or modification of fluorescent groups. Additionally, the sensors exhibit good performance in terms of repeated use and can also potentially detect different concentrations of ethanol solutions.
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ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Feng Zhang,Han Lv,Xuanyi Wang,Li Wang,Yanli Wei
Background Based on the biocompatibility and excellent photoluminescence, sulfur quantum dots (SQDs) have been applied to detect metal ions, lactate dehydrogenase, tartrazine and other compounds. But most of the reported sensing SQDs have a single emission, which is greatly affected by external conditions such as sensing environment, photobleaching, and other factors, and then decreasing the accuracy of sensing system, especially for the sensing in real samples. This often requires more accurate and reliable ratio fluorescent detection to overcome these drawbacks based on its self-correction to environmental interference. (86 words). Results Herein, Rhodamine 6G modified SQDs (Rho-6G-SQDs) with dual emission at 414 nm and 516 nm were synthesized, which are independent on the excitation wavelength and possess great stability. The emission of Rho-6G-SQDs at 414 nm can be significantly quenched by p -nitrophenol through the static quenching and photoinduced electron transfer, along with a visible color change of solution from blue to green under ultraviolet light. Based on this, a dual-channel sensing system was developed for the ratio fluorescent and colorimetric sensing of p -nitrophenol. The system has a rapid fluorescence response towards p -nitrophenol in the linear range of 0.117–20.0 μM and LOD as 35.6 nM (3σ/k) and colorimetric sensing with the linear correlation up to 200 μM and LOD of 9.90 nM (3σ/k). The sensing application for p -nitrophenol in sewage water sample achieved the spiked recovery from 99.3 % to 110 %. (138 words). Significance This is the first attempt to prepare fluorescent SQDs using small organic dye molecules as passivators instead of polymers. The developed dual-channel sensing system based on Rho-6G-SQDs provides great convenience for more accurate and effective p -nitrophenol detection in real water samples at low concentrations. (44 words).
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LUMINESCENCE
·
2024
·Vol. 39
·期 12
·e70055
·
IF 3.2
Jiarui Si,Yikang Liu,Yuanfei Jiang,Yutong Chen,Anmin Chen,Mingxing Jin
The fluorescence quenching behavior of rhodamine 6G (R6G) by graphene oxide (GO) under varying pH conditions was investigated. Utilizing steady-state fluorescence spectroscopy, single-photon counting, and ultrafast time-resolved absorption spectroscopy, we explored the quenching efficiency at pH values of 3, 7, and 11. Our findings reveal that GO effectively quenches R6G fluorescence across all tested pH levels, with the most significant quenching observed at pH 7. This quenching efficiency is attributed to optimal electrostatic interactions and efficient charge transfer between GO and R6G at neutral pH. At pH 3, the quenching efficiency is moderately reduced due to partial protonation of GO, which weakens electrostatic interactions but maintains hydrogen bonding. At pH 11, the quenching efficiency is lowest, likely due to increased electrostatic repulsion and reduced charge transfer resulting from deprotonation of GO. Ultrafast time-resolved absorption spectroscopy further confirmed the dynamic nature of the quenching process, showing distinct differences in relaxation kinetics across the pH spectrum. This study highlights the critical role of pH in modulating the quenching mechanisms of GO and R6G, providing valuable insights for the design of pH-sensitive fluorescence sensing systems.
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TRANSITION METAL CHEMISTRY
·
2026
·Vol. 51
·期 2
·30
·
IF 2.8
Li Shijie,Zhao Chenchen,Wang Lingyu,Feng Xiaoqi,Hou Jiaqiang,Gao Tianyu,Yang Guoli,Yao Kaisheng
To address the limitations of traditional synthesis methods for gold nanostructures, which rely on high temperatures, toxic reagents, and harsh conditions, this study proposes an eco-friendly strategy for synthesizing gold spikelet nanoflowers using poly(ionic liquid) (PIL) as a structure-directing agent. By employing HAuCl 4 as the precursor and ascorbic acid (AA) as the reducing agent, hierarchical Au spikelet nanoflowers with tertiary structure were successfully prepared via a one-pot method in a 60 °C water bath. Systematic investigation of the influencing factors revealed that temperature, AA concentration, and PIL concentration collectively determine the product morphology, with PIL concentration exerting the most significant influence on both the morphology and hierarchical structure of the Au nanoflowers. Using Rhodamine 6G (R6G) as a molecular probe, the resulting substrate exhibited exceptional surface-enhanced Raman scattering (SERS) sensitivity, achieving a detection limit of 10 − 12 M for R6G, which surpasses the performance of most reported Au/Ag-based materials, and demonstrates high reproducibility (< 2% average relative deviation (RAD) from measurements at five randomly selected locations). This work provides a sustainable approach for fabricating high-performance SERS substrates, demonstrating promising potential for applications in biological sensing and diagnostics. Graphical
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