Nano Research
·
2018
·Vol. 11
·期 3
·1447-1455
·
IF 7.994
Cai Zhixiong,Li Feiming,Xu Wei,Xia Shujun,Zeng Jingbin,He Shaogui,Chen Xi
Perovskite nanocrystals (NCs), which have emerged as a new class of phosphors with superb luminescence properties and bandgaps that can be easily tuned using chemical methods, have generated tremendous interest for a wide variety of applications where colloidal quantum dots have been very successful as carrier sources. In this study, self-assembled films of CsPbBr 3 NCs were produced via drop casting of colloidal NCs onto glassy carbon electrodes (GCEs) to form an NC film-modified electrode. The possible fabrication process of the CsPbBr 3 NCs films was discussed. We further studied the anodic electrochemiluminescence (ECL) behavior of the perovskite CsPbBr 3 NCs film using cyclic voltammetry with tripropylamine (TPA) as a coreactant, and a possible ECL mechanism was proposed. Briefly, TPA was oxidized to produce strongly reducing radical species, which can react with electrochemically oxidized CsPbBr 3 NCs to generate excited CsPbBr 3 NCs* capable of light emission. The relative stability of the ECL emission of the CsPbBr 3 NC films under aqueous conditions was also investigated, and it was found that they showed operational stability over the first three hours, indicating suitable reliability for application as sensing materials. The results suggested that semiconducting perovskite NCs have great potential for application in the ECL field.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Ailing Han,Yayu Yang,Qiang Zhang,Qingxia Tu,Guozhen Fang,Jifeng Liu,Shuo Wang,Rui Li
The electrochemistry and electrochemiluminescence (ECL) of copper metal cluster were studied in this work. The redox behavior observed was originated from the couples of Cu 8 + /Cu 8 2 + , Cu 8 /Cu 8 2 + , Cu 8 /Cu 8 + at the cluster metal core. ECL light emissions were observed under both annihilation and tripropylamine co-reactant conditions and only one excited state was involved in this ECL process and this excited state was also at the metal core. Theoretical investigation found that this excitation corresponds to an electron transfer from the metal core to the ligands. And the energy released from excited sate was approximate to the LUMO → HOMO gap energy of the cluster.
研究领域:
分析化学
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电化学
·
光化学
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产品关联
DOI
高影响因子
Advanced Sensor and Energy Materials
·
2022
·
IF 0
Wen-Xuan Fu,Ping Zhou,Wei-Liang Guo,Bin Su
As one of most advanced transduction techniques, electrochemiluminescence (ECL), such as that generated by tris(2,2′-bipyridyl)ruthenium (Ru(bpy) 3 2+ ), has been extensively used in chemical sensing and analysis, but the reaction mechanism has not been fully resolved. Aiming at gaining insightful mechanistic information on the coreactant system involving (Ru(bpy) 3 2+ ) and tri- n -propylamine (TPrA), herein we investigate the variation of thickness of ECL layer (TEL) with the concentration ratio of (Ru(bpy) 3 2+ ) to TPrA ( c Ru / c TPrA ) by ECL microscopy. Using carbon fiber as the working electrode, TEL was observed to grow with the increase of c Ru / c TPrA remarkably. In conjunction with finite element simulations, the extension of ECL layer was rationalized to be associated with the incremental contribution of so-called “catalytic route”. This route offers an additional channel of generating remote light emission in solution, apart from surface-confined emission produced by the “oxidative-reduction route”. Given the quantitative analysis of coreactant-type analytes is often based on the calibration curve, namely a graph generated by plotting the measured light intensity of a series of standard solutions against their concentrations, the contribution of “catalytic route” particularly at a low concentration of analyte (equivalent to a relatively large c Ru / c TPrA ) is favorable to the analytical sensitivity. Moreover, the presence and absence of this route will result in a nonlinear and linear calibration curve, respectively, for example in the detection of TPrA and pyruvate. The results highlight the microwire-based imaging approach can provide insightful mechanistic information and help unveil the concentration dependence of measured ECL intensity for precise quantitative analysis.
研究领域:
分析化学
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电化学
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生物传感
✓ 已验证
DOI
ANALYST
·
2010
·Vol. 136
·期 1
·205-210
·
IF 3.272
Mei-Jin Li,Pengchong Jiao,Min Lin,Weiwen He,Guo-Nan Chen,Xi Chen
A new water-soluble iridium(III) diimine complex with appended sugar was synthesized and characterized. The electrochemiluminescent behavior of the new complex in aqueous buffer was first studied and the ECL signal was found to be much higher than that of [Ru(bpy)3]2+ at a Pt working electrode. Tri-n-propylamine (TPA) and antibiotics were determined by the ECL of the iridium(III) complex in aqueous buffer at the Pt electrode and the method was found to show good sensitivity and reproducibility. The new iridium(III) complex was found to display good solubility in aqueous solution and a strong ECL signal at the Pt electrode, which might open up the possibility of its application in analysis.
研究领域:
分析化学
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电化学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Sun Yuchen,Guo Mingyu
In this work, we report the efficient removal of I − /IO 3 − from wastewater by tripropylamine quaternary ammonium cation based monodisperse microspheres. Benefitting from the rapid solvent exchange process and the excellent ionic selectivity of tripropylamine quaternary ammonium cation, these microspheres show capture rate of 98% for I − and 66% for IO 3 − at a concentration of 50 ppm. Meanwhile, they exhibit high adsorption capacities of 350 mg/g for I − and 370 mg/g for IO 3 − , coupling with excellent reusability. These characteristics highlight their superior practicability for removal of iodine, particularly in the context of radioactive iodine-contaminated water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Ding Jialian,Zhou Ping,Guo Weiliang,Su Bin
Electrochemiluminescence (ECL) imaging analysis based on the ultra-high-density microwell electrode array (UMEA) has been successfully used in biosensing and diagnostics, while the studies of ECL generation mechanisms with spatial resolution remain scarce. Herein we fabricate a gold-coated polydimethylsiloxane (PDMS) UMEA using electroless deposition method for the visualization of ECL reaction process at the single microwell level in conjunction with using microscopic ECL imaging technique, demonstrating that the microwell gold walls are indeed capable of enhancing the ECL generation. For the classical ECL system involving tris(2,2′-bipyridyl)ruthenium (Ru(bpy)32+) and tri-n-propylamine (TPrA), the ECL image of a single microwell appears as a surface-confined ring, indicating the ECL intensity generated inside the well is much stronger than that on the top surface of UMEA. Moreover, at a low concentration of Ru(bpy)32+, the ECL image remains to be ring-shaped with the increase of exposure time, because of the limited lifetime of TPrA radical cations TPrA+•. In combination with the theoretical simulation, the ring-shaped ECL image is resolved to originate from the superposition effect of the mass diffusion fields at both microwell wall and bottom surfaces.
研究领域:
分析化学
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生物传感
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医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Qian Wu,Li Tian,Xiangyu Shan,Huiling Li,Shuning Yang,Chao Li,Juan Lu
In this work, a novel electrochemiluminescence (ECL) sensor based on the CdSe@ZnSe and CNTs was constructed for the detection of melamine. CdSe@ZnSe acted as the co-reaction promoter for the enhancement of Ru(bpy) 3 2+ /tri- n -propylamine (TPrA) system and CNTs acted as carriers to immobilize more CdSe@ZnSe. The initial ECL signal significantly amplified due to the synergistic effect of CNTs and CdSe@ZnSe. The ECL signal decreased with the addition of melamine, and the change value of ECL intensity (ΔI) was linearly related to the logarithm of melamine concentration. The constructed ECL sensor was able to detect melamine in the range of 1.0 × 10 −11 − 1.0 × 10 −7 M, and the detection limit was 3.3 × 10 −12 M (S/N = 3). It can be used to detect melamine in milk samples.
研究领域:
分析化学
·
食品安全检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Lunjing Liu,Yu Fu,Chengli Zhang,Jingyan Lin,Huiyi Yang,Wenjie Wu,Jingru Wang,Jiang Xiao,Yideng Jiang,Yuhui Liao,Guanghua Li
Recurrent outbreaks of Mpox have highlighted the importance of rapid diagnosis to effectively control virus transmission from infected individuals. Traditional laboratory-based detection methods are time-consuming, complex, and unsuitable for point-of-care testing. Therefore, we developed a lateral flow immunoassay (LFIA) using platinum–gold nanoflowers (PtAu NFs) as a labeling material, and this technique was integrated with recombinase polymerase amplification (RPA) to detect Mpox within 25 min. From material preparation to detection, the speed and simplicity of detection were comprehensively optimized in this study. Moreover, a novel material preparation method based on tripropylamine (TPrA) as a reducing agent for the rapid preparation of PtAu NFs has been demonstrated. Unlike traditional reducing agents, this method does not require high temperatures and extended incubation periods, thereby providing a novel strategy for preparing nanomaterials. Furthermore, the traditional RPA–LFIA strategy was improved by directly modifying the primer label, avoiding the use of probes and exonucleases, which saves reagent costs. Under optimized conditions, the RPA–PtAu–LFIA platform had a visual limit of detection of 1 copy/μL, with high specificity for Mpox and other poxviruses. Furthermore, the sensitivity of this platform was validated using 29 different clinical samples obtained from the pustules, saliva, anus, and throat of infected individuals; the results obtained using this platform were comparable to those obtained using quantitative polymerase chain reaction. This study provides an excellent platform for preparing nanomaterials and detecting Mpox.
研究领域:
病毒学
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纳米医学
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诊断学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Lin Song,Han Jia,Fuling Zhang,Haidong Jia,Yuanbo Wang,Qiuyu Xie,Fangning Fan,Qiang Wang,Shijie Wen
Surfactant-free microemulsions (SFMEs) have been explored extensively to avoid the residual surfactant problem caused by traditional surfactant microemulsions. Many researchers focused on the SFMEs with tertiary amine, which exhibited the typical CO2 response behavior. In this study, the phase diagram of the SFMEs consisting of tripropylamine (TPA), ethanol, and water was readily prepared via the measurements of electrical conductivity. The CO2 response behavior of SFME was confirmed by determination of conductivity and measurement of the average diameter of SFME, which was mainly dependent on the protonation of TPA induced by the additional CO2. The transition of protonated TPA to a more hydrophilic nature from lipophilicity to hydrophilicity should be responsible for the variation of SFME average diameter. In addition, the SFMEs exhibited remarkable solubilizing capacity of crude oil, and three types of SFMEs achieved more than 80% oil removal rate in the washing process of oil sands. It was noted that both oil-in-water and bicontinuous SFMEs could be circularly utilized at least three times with a relatively high oil removal rate (%). Our work provided the insight perspective on the mechanism of SFMEs with a CO2 response behavior.
研究领域:
化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Ruidan Li,Li Tian,Yujia Song,Yanjia Guo,Guangping Ma,Pengfei Han,Hanyue Jiang,Wenzhuo Wang,Juan Lu
A self-supporting material of ZnNi 2 O 2 was synthesized and halloysite nanotubes (HNTs) served as carriers for Ru(bpy) 3 2+ , enhancing stability of the sensor and improving the electrochemiluminescence (ECL) value in this experiment. The ECL sensor for specific recognition of melamine (MEL) was developed based on ZnNi 2 O 2 and Ru(bpy) 3 2+ @HNTs as dual ECL reagents. The maximum initial signal was obtained in the presence of co-reactant tripropylamine (TPrA) through the synergy of ZnNi 2 O 2 and Ru(bpy) 3 2+ @HNTs. A molecularly imprinted polymer (MIP) containing specific recognition sites for MEL was to enable selective recognition, with pyrrole serving as the functional monomer and MEL as the template molecule. The quenching effect was observed as the concentration of MEL increased. Under optimal conditions, the sensor demonstrated the linear correlation between the change of ECL signal and the logarithm of MEL concentration from the range of 1.0 × 10 −12 to 1.0 × 10 −7 mol·L −1 . Satisfactory results were obtained for the detection of MEL in milk powder.
研究领域:
分析化学
·
传感器
·
纳米技术
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食品安全
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-11
·
IF 6.408
Zhai Hongguo,Wang Yue,Yin Jiaqi,Zhang Yuhao,Guo Qi,Sun Xia,Guo Yemin,Yang Qingqing,Li Falan,Zhang Yanyan
MXene@Au as the base and Au@SiO 2 as signal amplification factor were used for constructing an ultrasensitive “on–off” electrochemiluminescence (ECL) biosensor for the detection of Pb 2+ in water. The use of MXene@Au composite provided a good interface environment for the loading of tris(2,2-bipyridyl)ruthenium(II) (Ru(bpy) 3 2+ ) on the electrode. Based on resonance energy transfer, the Au (core) SiO 2 (shell) (Au@SiO 2 ) nanoparticles stimulate electron transport and promote tripropylamine (TPrA) oxidation. The luminescence effect of Au@SiO 2 was five times that of AuNPs and SiO 2 nanomaterials alone, and the ECL intensity was greatly improved. In addition, Pb 2+ activated the aptamer to exert its endonuclease activity, which realized the signal cycle amplification in the process of Pb 2+ detection. When Pb 2+ was added, the ECL signal weakened, and the Pb 2+ concentration was detected according to the decreased ECL intensity. Under optimized experimental conditions, this aptamer sensor for Pb 2+ has a wide detection range (0.1 to 1 × 10 6 ng L −1 ) and a low detection limit (0.059 ng L −1 ). The relative standard deviation (RSD) of the sensor is 0.39–0.99%, and the recovery of spiked standard is between 90.00 and 125.70%. The sensor shows good selectivity and high sensitivity in actual water sample analysis. This signal amplification strategy possibly provides a new method for the detection of other heavy metal ions and small molecules. Graphical abstract
研究领域:
分析化学
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环境科学
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材料科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Xuwen Gao,Huimin Zhao,Dongyang Wang,Yuqi Xu,Bin Zhang,Guizheng Zou
Singlet oxygen (1O2) is an important reactive oxygen species (ROS) that is intensively involved in natural photochemical and photobiological processes. Herein, selectively lighting up 1O2 is achieved in the aggregation-induced emission (AIE) of electrochemiluminescence (ECL) from the Zn2+-mediated AIE assembly of Au nanoclusters (Zn2+-AIE-AuNCs). Zn2+-AIE-AuNCs can exhibit efficient AIE ECL and photoluminescence (PL) along with 1O2 generation in energy and charge transfer routes, respectively. The AIE ECL of the Zn2+-AIE-AuNCs/tripropylamine (TEA) system in carbonate buffer is located around 703 nm with the dimeric aggregate of 1O2 as an emitter because electrochemically oxidizing coexisted Zn2+-AIE-AuNCs and TEA in carbonate buffer would promote the oxygen vacancy (Ov) of Zn2+-AIE-AuNCs, which could selectively enable the generation of emissive singlet oxygen in the energy transfer route by effectively transferring the energy from excited singlet Zn2+-AIE-AuNCs to the triplet ground state of dissolved oxygen (3O2). No emissive 1O2 is detected via electrochemically oxidizing the Zn2+-AIE-AuNCs in the case without either carbonate buffer or TEA, and the Zn2+-AIE-AuNCs/TEA system can only exhibit AIE ECL around 485 nm with Zn2+-AIE-AuNCs as the emitter in carbonate-free buffers. Photoexciting Zn2+-AIE-AuNCs merely brings out band-gap-engineered AIE PL around ∼485 nm with Zn2+-AIE-AuNCs as the emitter, which manifests that the 1O2 generated in the charge transfer route via photoexciting Zn2+-AIE-AuNCs is un-emissive. This work not only proposes an effective strategy for AIE with 1O2 as an emitter but also opens a promising way to selectively light up 1O2.
研究领域:
化学
·
材料科学
·
光化学
·
电化学
✓ 已验证
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）