JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Ziqi Wang,Yafang Gao,Zhangjin He,Liping Lu
In this paper, we systematically investigated the aggregation-induced electrochemiluminescence (AIECL) of the ruthenium(II) complex ([Ru(phen) 2 (phen-O 2 )](PF 6 ) 2 , phen-O 2 : 5,6-diketone-1,10-phenanthroline), which was dissolved in solvents with different water/acetonitrile volume ratios. The fluorescence intensity of the system increased 11.5-fold when the proportion of water (a poor solvent) in the solvent mixture was increased to 90%, and the electrochemiluminescence intensity increased 16-fold when the proportion of water in the solvent was increased to 80%. Transmission electron microscopy and dynamic light scattering confirmed the aggregation of [Ru(phen) 2 (phen-O 2 )](PF 6 ) 2 molecules into nanoclusters. Aggregation-induced electrochemiluminescence properties were observed to increase with an increase in the proportion of water in H 2 O/CH 3 CN. Due to the excellent aggregation-induced luminescence performance of [Ru(phen) 2 (phen-O 2 )](PF 6 ) 2 , the quantitative detection of dopamine was achieved with a good linear range of 100 pM–1uM and a limitation of detection of 33.3 pM. This simple and sensitive method based on the AIECL effect can be widely applied to the detection and analysis of other small biological molecules.
研究领域:
分析化学
·
材料科学
·
电化学
·
纳米技术
·
生物传感器
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Chenxia Li,Bowen Chen,Degang Deng,Hua Yu,Hao Li,Changyu Shen,Le Wang,Shiqing Xu
The La 1-0.03- y Gd y AlO 3 : 0.03Eu ( y = 0.2–0.8) phosphors are prepared via solid phase method. The normal thermal quenching of Eu 2+ ion and abnormal thermal quenching of Eu 3+ ion in La 1-0.03- y Gd y AlO 3 : 0.03Eu ( y = 0.2–0.8) phosphors are explained by the configuration coordinate system and energy transfer process . Considering the fluorescence intensity ratio temperature measurement technology, the temperature sensitivity values of the phosphors increase with the increase of Gd 3+ ion concentration . When Gd 3+ ion concentration is 0.8, the maximal S a and S r can even reach 0.084 K -1 and 3.233% K −1 . Moreover, the excellent separation of emission peaks of Eu 2+ and Eu 3+ ions also provides good signal discriminability for temperature measurement. These results indicate that the La 1-0.03- y Gd y AlO 3 : 0.03Eu phosphors can be used as the superior non-contact optical thermometry materials.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Xiuna Tian,Hongjian Dou,Lingyuan Wu
Based on the luminescence of Bi 3+ , novel temperature sensing materials YNbO 4 :Bi 3+ and YNbO 4 :Bi 3+ /Sm 3+ were successfully synthesized by solid state reaction. The XRD patterns show that the synthesized materials have a pure phase of YNbO 4 . With the excitation of 314 nm, the YNbO 4 :Bi 3+ material shows intense temperature-dependent luminescence in the range of 303 K–463 K. Based on the temperature-dependent luminescence of Bi 3+ in YNbO 4 , the maximum relative sensitivity can be obtained at 434 K (1.72% K −1 ). Under the excitation of 406 nm, the YNbO 4 :Sm 3+ material shows the characteristic emission peaks of Sm 3+ . In YNbO 4 :Bi 3+ /Sm 3+ phosphor, the large overlap between the emission spectra of Bi 3+ and the excitation spectra of Sm 3+ leads to a significant energy transfer from Bi 3+ to Sm 3+ . With the excitation of 314 nm, the emission spectra of YNbO 4 :Bi 3+ /Sm 3+ material shows the characteristic peaks of Bi 3+ and Sm 3+ . The luminescence intensity ratio of Sm 3+ and Bi 3+ shows a strong temperature dependence. Based on the luminescence intensity ratio, a large relative sensitivity is obtained at 455 K (1.57% K −1 ).
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 5
·728
·
IF 5.719
Wei Zhang,Yang Zang,Yanli Lu,Jinghui Han,Qingyun Xiong,Jinping Xiong
In this study. a novel near-infrared fluorescent-driven contrast agent (Ag-doped NaYF4:Yb3+/Er3+@NaYF4:Nd3+@NaGdF4) was synthesized using a coprecipitation-hydrothermal-solvothermal-solvothermal (CHSS) method. The results shows that hexagonal NaYF4:Yb3+/Er3+with a diameter of 300 nm was successfully synthesized by the CHSS method. The new contrast agent was characterized using scanning electron microscopy, fluorescence spectrometry, transmission electron microscopy, energy-dispersive spectrometry and ultraviolet-visible light diffuse reflectance absorption spectroscopy. Even at low concentrations (0.2 M), this proposed contrast agent can be excited by near-infrared light with a wavelength of 980 nm and emits a dazzling green light with a wavelength of 540 nm, and the comparison of the luminescence intensity proves that doping with silver increases the luminescence intensity of the upconverted nanomaterial by nearly 13 times based on the calculated quantum yield. TEM images show the successful preparation of silver nanoparticles with a diameter of 30 nm, and the energy spectrum shows the successful doping of silver nanoparticles and the successful preparation of the core-shell structure of NaYF4:Yb3+/Er3+@NaYF4:Nd3+@NaGdF4. Furthermore, the mechanism of the increased luminous intensity has been studied using simulation calculations. Finally, cytotoxicity tests were used to test material which was modified by 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000] (DSPE-PEG2K), and the biocompatibility was significantly improved, meeting the standard for biological applications.Keywords:upconversion;near-infrared;intensity;in vivo imaging
研究领域:
材料科学
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生物医学工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Forests
·
2023
·Vol. 14
·期 6
·1094
·
IF 2.9
Renjie Li,Junyuan Li,Jiangtao Shi,Yongyue Zhang,Yuxin Sun,Yuxi Chen,Zhipeng Liu
The water immersion ofPterocarpuswood produces strong blue fluorescence, which comes from the extract. The fluorescence contained in the extract is of interest for the identification ofPterocarpuswood. We conducted an investigation into the extraction solution ofPterocarpuswood and analyzed the mechanism of fluorescence in this species. Possible species of the fluorescent molecules are discussed based on the mixture. Liquid chromatography mass spectrometry (LC-MS) is used for an analysis of the extract, the obtained substances that may be fluorescent inPterocarpuswood. In addition, the change in the fluorescence intensity with changes in the pH and concentration in the extract is also studied. The results show that the fluorescent molecule is quenched by aggregation (Aggregation-Caused Quenching; ACQ) and is unstable in over-acidic and over-alkaline conditions (especially acidic).Keywords:Pterocarpuswood;extract solution;fluorescence intensity;conjugate structure
研究领域:
植物学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Le Han,Jiaqiang Liu,Peng Liu,Bohan Li,Xianliang Li,Yan Xu
Ratiometric fluorescent sensing materials based on dual-emissive luminescent centers have been widely researched due to their highly stable self-calibrating monitoring performance. In this work, Eu 3+ , Tb 3+ co-doped gadolinium molybdate [Gd 2 (MoO 4 ) 3 ] phosphors were successfully prepared through a facile precipitation and a following heat treatment process. Dual-emissive Gd 2 (MoO 4 ) 3 : Eu 3+ , Tb 3+ phosphor showed characteristic emission peaks at 592, 617, and 703 nm corresponding to the transitions of 5 D 0 – 7 F 1 , 5 D 0 – 7 F 2 and 5 D 0 – 7 F 4 for Eu 3+ ions, and the other emissions at 488 and 543 nm were ascribed to 5 D 4 – 7 F 6 and 5 D 4 – 7 F 5 transitions for Tb 3+ , respectively. The temperature sensitivities of Gd 2 (MoO 4 ) 3 : Eu 3+ , Tb 3+ based on a multimode fluorescence intensity ratio (FIR) technique were investigated for monitoring temperature changes in the range of 80–450 K. The maximum relative sensitivities of the four modes of FIR (I Tb 3+ /I Eu 3+ ) techniques were successfully achieved with range of 0.37–0.50% K −1 . The results also demonstrated the high reversibility of Gd 2 (MoO 4 ) 3 : Eu 3+ , Tb 3+ phosphor used as a self-calibrating thermometer for thermal-sensing application.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2014
·
IF 3.259
Zhongqiu Hu,Lin Li,Yahong Yuan,Tianli Yue
Ultrasensitive and simultaneous determination of amino acids and amines (AAs) in media and winemaking products is very important for evaluating the relationship profile between the depletion of AAs and aroma compounds formation. In this work, by combing the advantages of Taguchi’s scheme with Pareto graphs and Range analysis pattern, an analytical method with efficiently improving fluorescence intensity and resolutions of AAs while saving the time and resources is developed to simultaneously and ultrasensitively detect 21 AAs in media, wine and beer. The results indicate the detection limit (DL) could be reached at ng L −1 level (3.34–284.3 ng L −1 ), which is 10 6 higher than that of DL obtained by general method. Furthermore, the linear ranges are also established so that the proposed method could be accurately applied. These results demonstrate the method provides an easy and effective way to ultrasensitively and simultaneously analyse AAs in complex products.
研究领域:
分析化学
·
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Zelong Zhang,Linli Shen,Yi Zhao,Yujie Zhang,Haisheng Yang,Weidong Xiang,Xiaojuan Liang,Guoxin Chen,Haitao Yu
Many previous studies have reported that because of the large difference between the ionic radii of Cl and I, halogen exchange is difficult to occur between CsPbCl 3 and CsPbI 3 perovskite nanocrystals, and the interaction between CsPbCl 3 and CsPbI 3 NCs will lead to their dissolution. In this work, two kinds of nanocrystals, CsPbCl 3 and CsPbI 3 , were successfully crystallized simultaneously in glass by an in-situ growth method for the first time. Because of the effective reabsorption of photons, the CsPbCl 3 :CsPbI 3 nanocrystals displayed higher fluorescence emission intensity and higher photoluminescence quantum yield than those of CsPbI 3 nanocrystals. In addition, CsPbCl 3 :CsPbI 3 nanocrystal glasses showed excellent water resistance and thermal stability, which benefited from the effective protection of the glass matrix. In particular, the fluorescence intensity of the nanocomposites remained above 95% after immersion in water for 60 days. Light-emitting devices were prepared by combining a near-infrared-emitting CsPbCl 3 :CsPbI 3 nanocrystal glass and 400 nm LED chip, which were applied to indoor plant growth.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2015
·Vol. 26
·期 49
·495102
·
IF 3.821
Ming-Hao Yao,Jie Yang,Ji-Tao Song,Lin Zhang,Bi-Yun Fang,Dong-Hui Zhao,Rui-Xue Xia,Rui-Mei Jin,Yuan-Di Zhao,Bo Liu
Quantum dot (QD)–polypeptide probes have been developed through the specific metal-affinity interaction between polypeptides appended with N-terminal polyhistidine sequences and CdSe/ZnS core–shell QDs. The size and charge of a QD–polypeptide can be tuned by using different coiled-coil polypeptides. Compared to glutathione-capped QDs (QD–GSH), QD–polypeptide probes showed an approximately two- to three-fold luminescence increase, and the luminescence increase was not obviously related to the charge of the polypeptide. QD–polypeptide probes with different charge have a great effect on nonspecific cellular uptake. QD–polypeptide probes with negative charge exhibited lower nonspecific cellular uptake in comparison to the QD–GSH, while positively charged QD–polypeptide probes presented higher cellular uptake than the QD–GSH. A targeted QD–ARGD probe can obviously increase targeted cellular uptake in αvβ3 overexpressing HeLa cells compared to QD–A. In addition, QD–polypeptide probes showed lower in vitro cytotoxicity compared to the original QDs. These results demonstrate that these QD–polypeptide probes with high specific cellular uptake, high fluorescence intensity and low background noise are expected to have great potential applications in targeted cell imaging.
研究领域:
生物化学
·
分子生物学
·
纳米医学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Shuang-Yin Zhu,Dan Zhao,Rui-Juan Zhang,Qing-Xia Yao,Wen Liu
Researches on fluorescence intensity ratio (FIR) based temperature sensors have become more and more popular in recent years. Herein, we co-doped Pb 2+ and Sm 3+ into the host material Ba 2 MgY 2 (BO 3 ) 4 (BMYB) to prepare a new series of phosphors. The Pb 2+ activated phosphor BMYB:0.03 Pb 2+ presents a wide blue emission band centered at 416 nm under 278 nm laser excitation with internal quantum efficiency of 46%. In the presence of both Pb 2+ and Sm 3+ , energy transfer will occur between them, resulting in tunable color emission. Besides, the phosphor has an absolute sensitivity of 0.96% K −1 at 575 K, which makes it an excellent candidate for temperature sensing. These findings suggest that prepared phosphor is a potential candidate for color tunable phosphor and temperature sensing material.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Mingguang Zhu,Youzhen Zhuo,Hongyu Guo,Fafu Yang,Jiabin Qiu
The first perylene liquid crystals bearing six peripheral alkyl substituents on both 1,6,7,12-bay positions and imides positions were designed and synthesized in yields of 72–77%. The studies on their mesomorphic behaviors suggested that they possessed good ordered hexagonal columnar mesophase with low phase transition temperatures and wide ranges of mesophase temperature in comparison with their precursors with chloric groups and the similar perylene liquid crystal with 4- tert -butylphenolic groups on bay positions. Their photophysical properties revealed that they also had higher fluorescence intensities and fluorescence quantum yields than that of their precursors with chloric groups and the similar perylene liquid crystal with 4- tert -butylphenolic groups on bay positions. The good fluorescence in both solution and solid film were observed for the first time for perylene liquid crystals. This research indicated that the introduction of long p -nonylphenol units on bay position is an effect strategy to obtain perylene liquid crystal with good liquid crystalline behavior and excellent fluorescent property.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiufeng Song,Changhong Liu,Ran Xu,Luyun Cai
Diatoms exhibit great potential for biofuels, high value-added production from wastewater and promoting carbon neutrality. Fucoxanthin is identified as the main carotenoid in diatoms, which is a photosynthetic pigment with a variety of biological activities and physiological functions. Light quality is essential for microalgal growth, photosynthesis and intracellular metabolism, and microalgal cells often respond to the effects of light to regulate their biochemical makeup. Therefore, goal of this research was to develop a strategy for altering light quality and intensity to maximize fucoxanthin generation, in line with the photoresponsive traits of Phaeodactylum tricornutum and to investigate the underlying mechanism based on metabolomics and transcriptomics. Different light qualities, culture strategies, light intensities and light ratios were explored and optimized, and the findings illustrated that the optimal fucoxanthin production was observed when under the red light during the initial phase, followed by a transition to the blue-green mixed light (60μmol m −2 s −1 ) conditions in the subsequent phase. Transcriptome and metabolome analyses showed that the light shift strategy provided sufficient energy and precursors for cell growth and fucoxanthin accumulation by enhancing the EMP pathway, TCA cycle, and light-harvesting complex in photosynthetic system. The present study provides a feasible strategy and mechanism to customize the light quality regulatory strategy to enhance biosynthesis of target bioactive compounds, and provides a theoretical basis for further investigation of the regulatory mechanism, which can provide a foundation for microalgal fucoxanthin production.
研究领域:
微藻生物学
·
生物化学
·
环境科学
✓ 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）