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Li X, Zhao X, Wu L, Leng Y, Cai X. Highly Reversible “Off‐On‐Off” Dual‐channel Fluorescence Probe Based on Amino Pyrazole and Phenothiazine for Sensing Extremely Alkaline Solution. ChemistrySelect 2022. [DOI: 10.1002/slct.202104387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaohong Li
- Department of Chemical Engineering Guizhou Minzu University Guiyang China
| | - Xiaoli Zhao
- Department of Chemical Engineering Guizhou Minzu University Guiyang China
| | - Linli Wu
- Department of Chemical Engineering Guizhou Minzu University Guiyang China
| | - Yanli Leng
- Department of Chemical Engineering Guizhou Minzu University Guiyang China
| | - Xiaohua Cai
- Department of Chemical Engineering Guizhou Minzu University Guiyang China
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2
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Biquet-Bisquert A, Labesse G, Pedaci F, Nord AL. The Dynamic Ion Motive Force Powering the Bacterial Flagellar Motor. Front Microbiol 2021; 12:659464. [PMID: 33927708 PMCID: PMC8076557 DOI: 10.3389/fmicb.2021.659464] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 03/02/2021] [Indexed: 11/13/2022] Open
Abstract
The bacterial flagellar motor (BFM) is a rotary molecular motor embedded in the cell membrane of numerous bacteria. It turns a flagellum which acts as a propeller, enabling bacterial motility and chemotaxis. The BFM is rotated by stator units, inner membrane protein complexes that stochastically associate to and dissociate from individual motors at a rate which depends on the mechanical and electrochemical environment. Stator units consume the ion motive force (IMF), the electrochemical gradient across the inner membrane that results from cellular respiration, converting the electrochemical energy of translocated ions into mechanical energy, imparted to the rotor. Here, we review some of the main results that form the base of our current understanding of the relationship between the IMF and the functioning of the flagellar motor. We examine a series of studies that establish a linear proportionality between IMF and motor speed, and we discuss more recent evidence that the stator units sense the IMF, altering their rates of dynamic assembly. This, in turn, raises the question of to what degree the classical dependence of motor speed on IMF is due to stator dynamics vs. the rate of ion flow through the stators. Finally, while long assumed to be static and homogeneous, there is mounting evidence that the IMF is dynamic, and that its fluctuations control important phenomena such as cell-to-cell signaling and mechanotransduction. Within the growing toolbox of single cell bacterial electrophysiology, one of the best tools to probe IMF fluctuations may, ironically, be the motor that consumes it. Perfecting our incomplete understanding of how the BFM employs the energy of ion flow will help decipher the dynamical behavior of the bacterial IMF.
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Affiliation(s)
- Anaïs Biquet-Bisquert
- Centre de Biologie Structurale (CBS), INSERM, CNRS, Université Montpellier, Montpellier, France
| | - Gilles Labesse
- Centre de Biologie Structurale (CBS), INSERM, CNRS, Université Montpellier, Montpellier, France
| | - Francesco Pedaci
- Centre de Biologie Structurale (CBS), INSERM, CNRS, Université Montpellier, Montpellier, France
| | - Ashley L Nord
- Centre de Biologie Structurale (CBS), INSERM, CNRS, Université Montpellier, Montpellier, France
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3
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Zhou H, Feng R, Liang Q, Su X, Deng L, Yang L, Ma LJ. A sensitive pH fluorescent probe based on triethylenetetramine bearing double dansyl groups in aqueous solutions and its application in cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 229:117881. [PMID: 31822453 DOI: 10.1016/j.saa.2019.117881] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/25/2019] [Accepted: 11/30/2019] [Indexed: 06/10/2023]
Abstract
pH fluorescent probes possess many advantages, including intracellular detection, rapid response time and nondestructive testing. In this paper, a highly selective and sensitive fluorescent pH probe based on triethylenetetramine bearing double dansyl groups (1) was synthesized. This probe offers fluorescent measurement of pH value in the range of 5.81-7.21 in aqueous solution, with an 8.64-fold enhancement of fluorescent emission intensity over the unmodified probe. Probe 1 shows a fluorescent color change from a pale yellow to bright green when the pH is increased from 5.81 to 7.21. In addition, probe 1 shows good potential as a fluorescent visualizing sensor for pH values in living GS cells of epinepheluscoioides. The mechanism of the fluorescent response of probe 1 to solution pHs was further clarified by NMR, fluorescent spectra, and UV-vis absorption spectra. The results indicate that the fluorescent emission will shift with an increase in solution pHs, due to increasing deprotonation of the nitrogen atom on the sulfonamides. Deprotonation of the sulfonamide group will inhibits the intramolecular charge transfer process between the imino group and the naphthalene ring, resulting in the recognition phenomenon of blue shift and enhancement of fluorescent emission intensity.
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Affiliation(s)
- Hongqi Zhou
- School of Chemistry, South China Normal University, Guangzhou 510006, PR China; Department of Chemistry, Southern University of Science and Technology, 518055 Shenzhen, PR China
| | - Ruihong Feng
- School of Chemistry, South China Normal University, Guangzhou 510006, PR China
| | - Qingjian Liang
- College of Life Science, South China Normal University, Guangzhou 510631, PR China
| | - Xiaoping Su
- School of Chemistry, South China Normal University, Guangzhou 510006, PR China
| | - Lefang Deng
- School of Chemistry, South China Normal University, Guangzhou 510006, PR China
| | - Liting Yang
- School of Chemistry, South China Normal University, Guangzhou 510006, PR China
| | - Li-Jun Ma
- School of Chemistry, South China Normal University, Guangzhou 510006, PR China; School of Chemistry, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou 510006, PR China; Key Laboratory of Theoretical Chemistry of Environment Ministry of Education, South China Normal University, Guangzhou 510631, PR China.
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4
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Chen N, Kommidi H, Guo H, Wu AP, Zhang Z, Yang X, Xia L, An F, Ting R. A lysosome specific, acidic-pH activated, near-infrared Bodipy fluorescent probe for noninvasive, long-term, in vivo tumor imaging. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110762. [PMID: 32279764 DOI: 10.1016/j.msec.2020.110762] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/12/2020] [Accepted: 02/17/2020] [Indexed: 02/08/2023]
Abstract
Long-term, in vivo, fluorescent cell tracking probes are useful for understanding complex cellular processes including tissue regeneration, communication, development, invasion, and cancer metastasis. A near-infrared fluorescent, water-soluble probe is particularly important for studying these biological events and processes. Herein, a lysosome specific, near-infrared Bodipy probe with increased fluorescent intensity in the acidic, lysosome environment is reported. This Bodipy probe is packaged in a nanoparticle using DSPE-PEG2000. The resulting nanoparticle is intravenously delivered to a tumor xenograft, where the fluorescent Bodipy becomes useful for non-invasive, long-term, in vivo fluorescent tumor imaging for periods greater than 36 days. These long-term, in vitro and in vitro tracking data indicate that the described Bodipy nanoparticles hold great potential for monitoring biological processes.
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Affiliation(s)
- Nandi Chen
- Department of Gastrointestinal Surgery, The Second Clinical Medicine College (Shenzhen People's Hospital) of Jinan University, Shenzhen, Guangdong 518020, China; Molecular Imaging Innovations Institute (MI3), Department of Radiology, Weill Cornell Medical College, 413 East 69th Street, New York, NY 10065, United States; State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Harikrishna Kommidi
- Molecular Imaging Innovations Institute (MI3), Department of Radiology, Weill Cornell Medical College, 413 East 69th Street, New York, NY 10065, United States
| | - Hua Guo
- Molecular Imaging Innovations Institute (MI3), Department of Radiology, Weill Cornell Medical College, 413 East 69th Street, New York, NY 10065, United States
| | - Amy P Wu
- Department of Otolaryngology, Head & Neck Surgery, Northwell Health, Hofstra Northwell School of Medicine, Hempstead, NY 11549, United States
| | - Ziming Zhang
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Health Science Center, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, Shaanxi 710061, China
| | - Xiaohai Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Ligang Xia
- Department of Gastrointestinal Surgery, The Second Clinical Medicine College (Shenzhen People's Hospital) of Jinan University, Shenzhen, Guangdong 518020, China.
| | - Feifei An
- Molecular Imaging Innovations Institute (MI3), Department of Radiology, Weill Cornell Medical College, 413 East 69th Street, New York, NY 10065, United States; Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Health Science Center, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, Shaanxi 710061, China.
| | - Richard Ting
- Molecular Imaging Innovations Institute (MI3), Department of Radiology, Weill Cornell Medical College, 413 East 69th Street, New York, NY 10065, United States.
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5
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Lin S, Huang H, Ma T, Zhang Y. Photocatalytic Oxygen Evolution from Water Splitting. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 8:2002458. [PMID: 33437579 PMCID: PMC7788637 DOI: 10.1002/advs.202002458] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/31/2020] [Indexed: 06/12/2023]
Abstract
Photocatalytic water splitting has attracted a lot of attention in recent years, and O2 evolution is the decisive step owing to the complex four-electrons reaction process. Though many studies have been conducted, it is necessary to systematically summarize and introduce the research on photocatalytic O2 evolution, and thus a systematic review is needed. First, the corresponding principles about O2 evolution and some urgently encountered issues based on the fundamentals of photocatalytic water splitting are introduced. Then, several types of classical water oxidation photocatalysts, including TiO2, BiVO4, WO3, α-Fe2O3, and some newly developed ones, such as Sillén-Aurivillius perovskites, porphyrins, metal-organic frameworks, etc., are highlighted in detail, in terms of their crystal structures, synthetic approaches, and morphologies. Third, diverse strategies for O2 evolution activity improvement via enhancing photoabsorption and charge separation are presented, including the cocatalysts loading, heterojunction construction, doping and vacancy formation, and other strategies. Finally, the key challenges and future prospects with regard to photocatalytic O2 evolution are proposed. The purpose of this review is to provide a timely summary and guideline for the future research works for O2 evolution.
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Affiliation(s)
- Sen Lin
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing100083China
| | - Hongwei Huang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing100083China
| | - Tianyi Ma
- Discipline of ChemistryUniversity of NewcastleCallaghanNSW2308Australia
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing100083China
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6
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Di Paolo M, Boubeta FM, Alday J, Torino MM, Aramendía PF, Suarez SA, Bossi ML. Design and characterization of pH-sensitive spirorhodamine 6G probes with aliphatic substituents. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.112011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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A photostable Si-rhodamine-based near-infrared fluorescent probe for monitoring lysosomal pH during heat stroke. Anal Chim Acta 2019; 1092:117-125. [PMID: 31708024 DOI: 10.1016/j.aca.2019.09.053] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 09/18/2019] [Indexed: 12/23/2022]
Abstract
Heat stroke is a symptom of hyperthermia with a temperature of more than 40 °C, which usually leads to all kinds of physical discomfort and even death. It is necessary to study the mechanism of action of heat stroke on cells or organelles (such as cytotoxicity of heat) and the processes of cells or organelles during heat stroke. Recent studies have shown that there is a certain correlation between heat stroke and lysosome acidity. In order to clarify their relationship, Lyso-NIR-pH, a photostable Si-rhodamine-based near-infrared fluorescent probe, was developed for sensing pH changes in lysosomes during heat stroke in this paper. For Lyso-NIR-pH, a morpholine group is employed as the lysosome-targeting unit and a H+-triggered openable deoxylactam is employed as the response unit to pH. Lyso-NIR-pH can detect pH with a high selectivity and a sensitivity, and its pKa is 4.63. Lyso-NIR-pH also has outstanding imaging performances, such as excellent lysosome-targeting ability, low autofluorescence and photostable fluorescence signal, which are in favor of long-term imaging of pH with accurate fluorescence signals. Moreover, we successfully applied Lyso-NIR-pH to monitor lysosomal pH increases induced by chloroquine and apoptosis in live cells. Finally, we successfully applied Lyso-NIR-pH for monitoring changes of lysosomal pH during heat stroke. These results confirmed that Lyso-NIR-pH is a powerful tool to monitor pH change in lysosomes and study its possible effects.
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8
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Yang Y, Chen J, Liu X, Qiu M, Liu L, Gao F. Oxygen vacancy-mediated WO 3 nanosheets by etched {200} facets and the efficient visible-light photocatalytic oxygen evolution. NEW J CHEM 2019. [DOI: 10.1039/c9nj04286e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The abundant oxygen vacancies in WO3 nanosheets result in the significant improvement of the photocatalytic O2 evolution.
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Affiliation(s)
- Yurong Yang
- College of Science
- Heihe University
- Heihe
- P. R. China
- Key Laboratory of Superlight Materials and Surface Technology
| | - Jiaming Chen
- College of Science
- Heihe University
- Heihe
- P. R. China
| | - Xuelian Liu
- College of Science
- Heihe University
- Heihe
- P. R. China
| | - Min Qiu
- College of Science
- Heihe University
- Heihe
- P. R. China
| | - Li Liu
- College of Science
- Heihe University
- Heihe
- P. R. China
| | - Fan Gao
- College of Science
- Heihe University
- Heihe
- P. R. China
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9
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Zhang P, Lv H, Duan G, Dong J, Ge Y. A novel pyrazolo[1,5- a]pyridine fluorophore and its application to detect pH in cells. RSC Adv 2018; 8:30732-30735. [PMID: 35548712 PMCID: PMC9085528 DOI: 10.1039/c8ra06191b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 08/17/2018] [Indexed: 01/09/2023] Open
Abstract
A new fluorescent probe based on pyrazolo[1,5-a]pyridine was synthesized and used to monitor the pH in cells. This probe exhibited a fast response to acidic pH (less than 10 s), a high quantum yield (φ = 0.64), and high selectivity and sensitivity. The response mechanism of the fluorescent probes relies on the ICT change.
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Affiliation(s)
- Ping Zhang
- School of Chemistry and Pharmaceutical Engineering, Taishan Medical University Taian Shandong 271016 P. R. China +86-538-6229741 +86-538-6229741
| | - Huaying Lv
- Laigang Hospital Affiliated to Taishan Medical University Lai'wu 271126 P. R. China
| | - Guiyun Duan
- School of Chemistry and Pharmaceutical Engineering, Taishan Medical University Taian Shandong 271016 P. R. China +86-538-6229741 +86-538-6229741
| | - Jian Dong
- School of Chemistry and Pharmaceutical Engineering, Taishan Medical University Taian Shandong 271016 P. R. China +86-538-6229741 +86-538-6229741
| | - Yanqing Ge
- School of Chemistry and Pharmaceutical Engineering, Taishan Medical University Taian Shandong 271016 P. R. China +86-538-6229741 +86-538-6229741
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10
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Quantitative correlations between collision induced dissociation mass spectrometry coupled with electrospray ionization or atmospheric pressure chemical ionization mass spectrometry – Experiment and theory. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.12.098] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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11
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You Q, Shen J, Shen G, Peng L, Lu Y, Fu Q, Xu Y, Zhang L. A Colorimetric and Fluorescent pH Probe for Extremely Acidic Conditions and its Application in pH Test Paper. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11395] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Qihua You
- Department of Science and Technology for Inspection; Xiamen Huaxia University; Xiamen 361024 China
| | - Jinhai Shen
- Department of Science and Technology for Inspection; Xiamen Huaxia University; Xiamen 361024 China
| | - Ganping Shen
- Department of Science and Technology for Inspection; Xiamen Huaxia University; Xiamen 361024 China
| | - Liyun Peng
- Department of Science and Technology for Inspection; Xiamen Huaxia University; Xiamen 361024 China
| | - Yuanqin Lu
- Department of Science and Technology for Inspection; Xiamen Huaxia University; Xiamen 361024 China
| | - Qi Fu
- Department of Science and Technology for Inspection; Xiamen Huaxia University; Xiamen 361024 China
| | - Yuqing Xu
- School of Physics and Optoelectronics Engineering; Ludong University; Yantai 264025 China
| | - Lei Zhang
- Biology Institute of Shanxi; Taiyuan 030006 China
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12
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Ning Y, Wang X, Sheng K, Yang L, Han W, Xiao C, Li J, Zhang Y, Wu S. A novel colorimetric and fluorescence turn-on pH sensor with a notably large Stokes shift for its application. NEW J CHEM 2018. [DOI: 10.1039/c8nj02860e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A novel naked-eye colorimetric and fluorescent turn-on pH sensor based on a naphthalenone scaffold was rationally designed and facilely synthesized.
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Affiliation(s)
- Yaoyao Ning
- School of Pharmacy
- Biomedicine Key Laboratory of Shaanxi Province
- Northwest University
- Xi’an 710069
- China
| | - Xiaoqing Wang
- Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry & Materials Science
- Northwest University
- Xi'an
- China
| | - Kangjia Sheng
- School of Pharmacy
- Biomedicine Key Laboratory of Shaanxi Province
- Northwest University
- Xi’an 710069
- China
| | - Lili Yang
- School of Pharmacy
- Biomedicine Key Laboratory of Shaanxi Province
- Northwest University
- Xi’an 710069
- China
| | - Wei Han
- School of Pharmacy
- Biomedicine Key Laboratory of Shaanxi Province
- Northwest University
- Xi’an 710069
- China
| | - Chaoni Xiao
- School of Pharmacy
- Biomedicine Key Laboratory of Shaanxi Province
- Northwest University
- Xi’an 710069
- China
| | - Jianli Li
- Ministry of Education Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry & Materials Science
- Northwest University
- Xi'an
- China
| | - Yongmin Zhang
- School of Pharmacy
- Biomedicine Key Laboratory of Shaanxi Province
- Northwest University
- Xi’an 710069
- China
| | - Shaoping Wu
- School of Pharmacy
- Biomedicine Key Laboratory of Shaanxi Province
- Northwest University
- Xi’an 710069
- China
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13
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Xu L, Yan X, Yuan C. An unexpected dual-response pH probe based on acridine. RSC Adv 2018; 8:35289-35293. [PMID: 35547025 PMCID: PMC9087899 DOI: 10.1039/c8ra07283c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 10/10/2018] [Indexed: 12/12/2022] Open
Abstract
A new pH fluorescent probe 2,8-bis(acridin-9-ylethynyl)-6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine (TBN), which has two acridine moieties attached to Tröger's base, is a useful fluorescent probe for monitoring extreme acidic and alkaline pH. TBN displays an excellent pH dependent behavior and responds linearly to extreme conditions in the pH ranges of 1.4–3.4 and 12.5–15.0. TBN can represent a novel type of fluorescent probe with perfect emission properties in extreme acidic and alkaline conditions by utilizing only one functional group. A novel pH fluorescence probe for monitoring extreme acidic and alkaline pH which responds linearly to extreme conditions in the pH ranges of 1.4–3.4 and 12.5–15.0 by utilizing only the acridine moiety.![]()
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Affiliation(s)
- Liang Xu
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
| | - Xiangzhen Yan
- Department of Periodontology
- School and Hospital of Stomatology
- Tongji University
- Shanghai Engineering Research Center of Tooth Restoration and Regeneration
- Shanghai 200072
| | - Chunxue Yuan
- College of Materials Science and Engineering
- Tongji University
- Shanghai 201804
- P. R. China
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