JOURNAL OF FLUORESCENCE
·
2023
·
IF 2.7
Zhang Cheng-lu,Liu Chang,Nie Shi-ru,Zhang Yang,Guo Jing-hao,Li Xiang-ling,Liu Cui
For the efficient detection of Hg 2+ and ClO − , a double-analyte-responsive fluorescent probe PTB was successfully synthesized by combining N-butyl-3-formyl phenothiazine with hydrazine benzothiazole, and designing a specific reaction site for recognizing two analytes (Hg 2+ and ClO − ) in a compound. It was shown that probe PTB successfully formed a stable complex with Hg 2+ in the coordination ratio of 2:1 by using the strong sulfur affinity of Hg 2+ , which resulted in a remarkable "turn-off" effect, with a quenching efficiency of 92.5% and four reversible cycles of Hg 2+ fluorescence detection. For the fluorescence detection of Hg 2+ , the response time is fast (≤ 2 min) and the detection limit is low (7.8 nM), showing extremely high sensitivity, and the performance is obviously better than that of the reported fluorescent probes for detecting Hg 2+ . In particular, probe PTB has low toxicity and good biocompatibility, and has been successfully used for imaging of Hg 2+ in living cells. Moreover, probe PTB uses thioether bond and carbon-nitrogen double bond as reaction sites to detect ClO − , which has large Stokes Shift (149 nm), good selectivity, high quenching efficiency (96.5%) and fast time response (about 10 s), and successfully detects ClO − in actual water samples. Graphical The dual functional fluorescent probe PTB is sensitive for Hg 2+ and ClO − . It has been successfully used for making pH fluorescent test paper and imaging detection of exogenous Hg 2+ in VSMC cells with low toxicity.
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Yan Zhao,Xinquan Yu,Xiao Liu,Dailiang Zhang,He Li,Hanlin Zhou,Weiheng Kong,Fengli Qu
Single-excitation ratio fluorescent probes have enabled the output signal with high signal-to-noise ratio, but are still plagued with technique challenges, including signal distortion and limited application scenario. Herein, a dual-excitation near-infrared (NIR) fluorescent probe P1 of coumarin derivatives is constructed, showing high signal output ability in the visible region and high tissue penetration depth ability in the NIR region. As NIR probe P1 selectively recognizes ClO–, the emission signal in the visible region (480 nm) of P1 is enhanced during the recognition process. Meanwhile, the NIR emission (830 nm) of the conjugated system is weakened, finally realizing that ClO– triggered the dual-excitation (720/400 nm) ratio fluorescence signal detection and monitoring. The signal of detection in vitro has high responsiveness. Meanwhile, in the process of NIR monitoring in vivo, positive contrast imaging of fluorescence is constructed, which can accurately monitor ClO– changes over time. The current dual-excitation fluorescence-based data calibration and/or comparison method improves the application of the traditional single-excitation ratio fluorescence strategy and provide innovative detection tools for accurate measurement of fluorescence detection, with detection/monitoring modes suitable for different physiological environments.
研究领域:
生物化学
·
医学影像
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2021
·
IF 3.315
Hao Zhang,Zihan Yuan,Mingkun Wang,Lin Zhu,Xiao Cheng,Duxia Cao,Ruifang Guan,Chuanjian Zhou
Graphene quantum dots (GQDs) are a new type of carbon material that have received widespread attention in recent years. However, due to their complex structure, it is difficult to explore their fluorescence emission mechanism and application mechanism. In this work, GQDs with simple structure were prepared using citric acid as a single precursor. The fluorescence properties and structure of GQDs were characterized, and the results confirmed that their luminescence originated from the n → π* electronic transition produced by the oxygen-containing functional groups in the edge state. Significantly, GQDs can be used as excellent probes to detect Hg 2+ and ClO − in aqueous solution. Hg 2+ combines with the carboxyl groups of the edge states of GQDs to form a complex, and then reduces the fluorescence emission through non-radiative electron transfer . ClO − can oxidize the hydroxyl groups in the edge states of GQDs to make them positively charged, which prevents electron transfer related to the luminescent center and reduces fluorescence emission.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2021
·
IF 1.134
Ke-Xin WANG,Chen NIE,Rui-Fang GUAN,Hao ZHANG
In recent years, unconventional fluorescent molecules without conjugated rings have attracted widespread interest due to their excellent fluorescence properties, simple preparation process, good water solubility and excellent biocompatibility. Dual emission fluorescent probes are usually more accurate and sensitive, for eliminating the influence of environmental factors. This work provides a novel strategy to construct double emission fluorescent probes based on unconventional fluorescent molecules and fluorescein isothiocyanate. The aqueous solution of resulting double emission polymer dots ( f-PDs ) shows two fluorescence emission peaks centered at 440 nm and 510 nm under excitation at 363 nm. According to change of these two peaks after adding ions, Cu 2+ and ClO − are judged quantitatively. Cu 2+ or ClO − are also quench fluorescence of f-PDs linearly, as Cu 2+ combines with polyethyleneimine parts of f-PDs to form complexes, while ClO − oxidize hydroxyl groups on the surface of f-PDs . The detection limits of Cu 2+ and ClO − , in an aqueous solution are 6.7 nM and 14.0 nM, respectively.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Xuecong Qian,Shilong Wang,Haijun Cheng,Ziye Jia,Da Wang,Yandong Xie,Jinhao Duan,Yu Tian,Jun Ma
The oxidation kinetics of Mn(II) by free chlorine is relatively low under near-neutral pH conditions which limits the Mn removal efficiency in drinking water treatment. Therefore, this study investigated the oxidation efficiency of Mn(II) by the UV-enhanced chlorination (UV/chlorine) system and identified the responsible reactive radical species. The results show that the oxidation kinetic of Mn(II) was greatly enhanced by the UV/chlorine system under near-neutral pH or even acidic conditions. The pseudo-first-order reaction rate of Mn(II) at pH 8.0 (within the first 20 min) increased from 2.60 × 10 −5 s −1 to 3.41 × 10 −4 s −1 . Based on the scavenging experiments and the steady-state kinetic modeling, ClO · and ClO 2 , whose steady-state concentration (∼10 −10 M and ∼10 −9 M, respectively at pH 8.0) was at least 4 orders of magnitude higher than that of HO · and Cl · , were recognized as the dominant reactive species contributing to the oxidation of Mn(II). Kinetic model calculations indicate that the contribution of ClO · to the oxidation of Mn(II) was consistently maintained above 70 %, and ClO 2 also played an important role in the oxidation of Mn(II) especially under acidic and alkaline conditions. In addition, the background components of HCO 3 − and Cl − had negligible influence on the oxidation efficiency because they barely changed the concentration of the ClO · and ClO 2 . This study first demonstrates the important role of ClO 2 in the oxidation of Mn(II) in the UV/chlorine system, and the possible role of ClO 2 in the degradation of some organic pollutants needs to be carefully evaluated in the future.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Baolong Huo,Man Du,Ao Shen,Mengwen Li,Yaru Lai,Xue Bai,Aijun Gong,Leqiu Fang,Yunxu Yang
A highly selective and sensitive fluorescence “light-up” probe PTH for ClO − has been developed, which is designed by a new strategy based on TEMPO-oxidation for the first time. PTH exhibits excellent properties including quick response (within 2 min), lower detection limit (63.7 nM), good linearity ( R 2 = 0.9863) and specific selectivity. More importantly, its application of detection ClO- in real samples has also been achieved.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Shuo Tao,Renshun Xu,Xiaolei Li,Dawei Li,Huaijun Ma,Donge Wang,Yunpeng Xu,Zhijian Tian
Extra-large-pore aluminophosphate –CLO (i.e., DNL-1) nanocrystals were synthesized in a eutectic mixture composed of diethylamine hydrochloride (DEAC) and ethylene glycol (EG) with 1-methylimidazole (1-MIm) as an additional amine using both conventional and microwave heating . The effects of the synthesis parameters, such as the amount of 1-MIm and the P/Al ratio, on the formation of DNL-1 nanocrystals were studied. The products were characterized using a variety of techniques. XRD , DLS , SEM and TEM results indicate that the as-synthesized DNL-1 nanocrystals have good crystallinity and narrow particle size distributions , and their average particle size was controlled in the 100–220 nm range by simply adjusting the amount of 1-MIm. TG–DSC and N 2 adsorption analyses reveal that the as-synthesized DNL-1 nanocrystals exhibit good thermal stability and the calcined samples possess high BET surface areas and large pore volumes . In addition, the cooperative structure-directing effects of 1-MIm and the eutectic mixture cation (DEA + ) in the formation of DNL-1 nanocrystals were discussed.
研究领域:
无机化学
·
材料科学
·
纳米技术
·
多孔材料
·
晶体工程
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Hongyu Guo,Jianrong Lin,Linlu Zheng,Fafu Yang
Although some reports on sensing ClO − had been presented, the ClO − sensor with high selectivity and sensitivity in aqueous media was still expected. Herein, an effective fluorescent sensor for ClO − in aqueous media was designed and synthesized by simple procedure based on cyanostilbene derivative ( TCS ). TCS exhibited strong fluorescence in aqueous media, which could be selectively quenched by ClO − among various species. The detection limit was as low as 3.2 × 10 −8 M. The sensing mechanism of the oxidation of sulfur in thiophene unit was confirmed by the FT-IR spectrum, fluorescence Job’s plot, 1 H NMR spectrum and MS spectrum. This sensor was successfully applied on detecting ClO − in real sample and living-cell imaging, suggesting its potential application for sensing ClO − in both vitro assay and vivo environment.
研究领域:
分析化学
·
生物医学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Wenjie Kuang,Zhang Yan,Jinxiu Chen,Xiaotang Ling,Wenxiao Zheng,Weijun Huang,Chunhua Feng
Electrochemical oxidation has been demonstrated to be a useful method for removing biorefractory organic pollutants in mature landfill leachate but suffers from low efficiency in eliminating ammonium because of its resistance to being oxidized by HO• or free chlorine (FC) at decreased pH. Here, we propose a new bipolar membrane-electrochlorination (BPM-EC) process to address this issue. We found that the BPM-EC system was significantly superior to both the undivided and divided reactors with monopolar membranes in terms of elevated rate of ammonium removal, attenuated generation of byproducts (e.g., nitrate and chloramines), increased Faradaic efficiency, and decreased energy consumption. Mechanistic studies revealed that the integration of BPM was helpful in creating alkaline environments in the vicinity of the anode, which facilitated production of surface-bound HO• and FC and eventually promoted in situ generation of ClO•, a crucial reactive species mainly responsible for accelerating ammonium oxidation and selective transformation to nitrogen. The efficacy of BPM-EC in treating landfill leachates with different ammonium concentrations was verified under batch and continuous-flow conditions. A kinetic model that incorporates the key parameters was developed, which can successfully predict the optimal number of BPM-EC reactors (e.g., 2 and 5 for leachates containing 589.4 ± 5.5 and 1258.1 ± 9.6 mg L–1 NH4+-N, respectively) necessary for complete removal of ammonium. These findings reveal that the BPM-EC process shows promise in treating ammonium-containing wastewater, with advantages that include effectiveness, adaptability, and flexibility.
研究领域:
环境科学
·
电化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jiaojiao Wang,Yanyan Gao,Yuexing Zhang,Dongmei Xu,Zongxin Li,Yifei Su,Fang Wang,Ning Zhang,Daopeng Zhang,Kang Wang,Yuting Chen
A versatile dihydroxylsalicylaldazine-containing fluorene (DHSF) compound was easily prepared through a one-step reaction. DHSF simultaneously exhibited solvent-regulating fluorescent OFF–ON behavior toward Al3+/Cr3+ and a dynamic OFF–ON–OFF fluorescent response toward Fe3+ in different aqueous DMF solutions with multiple absorption–ratiometric signals. These could be mainly attributed to the different binding modes between enol–keto isomers and Fe3+/Al3+/Cr3+, as proved by DFT calculation and IR spectroscopy results. Furthermore, DHSF displayed fluorescent OFF–ON–OFF and absorption–ratiometric dual responses to increasing ClO− amounts. These results, together with the fluorescent ON–OFF changes from the metal displacement of the DHSF–Al3+/Fe3+ system by Cu2+, show that monomolecular DHSF is a versatile chemosensor for sensitively detecting Al3+/Cr3+/Cu2+ and quantitatively analysing Fe3+/ClO− with practical application potential.
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2019
·
IF 7.149
Yan Zhang,Jinhua Li,Jing Bai,Linsen Li,Shuai Chen,Tingsheng Zhou,Jiachen Wang,Ligang Xia,Qunjie Xu,Baoxue Zhou
The conversion of excess ammonia N into harmless N2 is a primary challenge for wastewater treatment. We present here a method to generate ClO• directionally for quick and efficient decomposition of NH4+ N to N2. ClO• was produced and enhanced by a bifacial anode, a front WO3 photoanode and a rear Sb–SnO2 anode, in which HO• generated on WO3 reacts with HClO generated on Sb–SnO2 to form ClO•. Results show that the ammonia decomposition rate of Sb–SnO2/WO3 is 4.4 times than that of WO3 and 3.3 times than that of Sb–SnO2, with achievement of the removal of NH4+ N on Sb–SnO2/WO3 and WO3 being 99.2 and 58.3% in 90 min, respectively. This enhancement is attributed to the high rate constant of ClO• with NH4+ N, which is 2.8 and 34.8 times than those of Cl• and HO•, respectively. The steady-state concentration of ClO• (2.5 × 10–13 M) is 102 times those of HO• and Cl•, and this is further confirmed by kinetic simulations. In combination with the Pd–Cu/NF cathode to form a denitrification exhaustion system, Sb–SnO2/WO3 shows excellent total nitrogen removal (98.4%), which is more effective than WO3 (47.1%) in 90 min. This study provides new insight on the directed ClO• generation and its application on ammonia wastewater treatment.
研究领域:
环境科学
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 38
·2302302
·
IF 13.3
Zhao He,Jian Zhu,Xin Li,Guo-Jun Weng,Jian-Jun Li,Jun-Wu Zhao
In this paper, Au@Ag nanopencil is designed as a multimodality plasmonic nanoprobe based on asymmetric etching for the detection of SCN − and ClO − . Au@Ag nanopencil with Au tip and Au@Ag rod is prepared by asymmetric tailoring of uniformly grown silver-covered gold nanopyramids under the combined effect of partial galvanic replacement and redox reaction. By asymmetric etching in different systems, Au@Ag nanopencil exhibits diversified changes in the plasmonic absorption band: O 2 •− facilitated by SCN − etches Au@Ag rod from the end to the tip, causing a blue shift of the localized surface plasmon resonance (LSPR) peak as the aspect ratio decreases; while the ClO − can retain Au@Ag shell and etch Ag within rod from the tip to the end, causing a redshift of the LSPR peak as the coupling resonance weakens. Based on peak shifts in different directions, a multimodality detection of SCN − and ClO − has been established. The results demonstrate the detection limits of SCN − and ClO − are 160 and 6.7 n m , and the linear ranges are 1–600 µ m and 0.05–13 µ m , respectively. The finely designed Au@Ag nanopencil not only broadens the horizon of designing heterogeneous structures, but also enriches the strategy of constructing multimodality sensing platform.
研究领域:
纳米材料
·
分析化学
·
生物传感
✓ 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）