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Gao Y, Song G, Shi G, Xiao J, Yuan C, Ge Y. Simple and Commercially Available 6-chloroimidazo[1,2-a]pyridine-2-carboxylic Acid-based Fluorescent Probe for Monitoring pH Changes. J Fluoresc 2023; 33:305-309. [PMID: 36414919 DOI: 10.1007/s10895-022-03086-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 11/10/2022] [Indexed: 11/23/2022]
Abstract
Commercially available compounds that can be directly used as fluorescent probes will greatly promote the development of fluorescent imaging. Based on our previously work related to nitrogen bridgehead heterocycles, herein, a commercially available compound, 6-chloroimidazo[1,2-a]pyridine-2-carboxylic acid, has been detected for monitoring pH value (3.0-7.0). The probe proves to have high selectivity and sensitivity, brilliant reversibility, and extremely short response time. The real-time imaging of pH changes in yeast was also conducted.
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Affiliation(s)
- Yunlong Gao
- Center for Disease Control and Prevention of Weifang Binhai Economic-Technological Development Area, Weifang, Shandong, People's Republic of China
| | - Guangle Song
- Department of Chemistry and Pharmaceutical Engineering, Shandong First Medical University & Shandong Academy of Medical Sciences, No. 619, Changcheng Road, Taian, Shandong, 271016, People's Republic of China
| | - Guowei Shi
- Department of Chemistry and Pharmaceutical Engineering, Shandong First Medical University & Shandong Academy of Medical Sciences, No. 619, Changcheng Road, Taian, Shandong, 271016, People's Republic of China
| | - Jixiang Xiao
- Department of Chemistry and Pharmaceutical Engineering, Shandong First Medical University & Shandong Academy of Medical Sciences, No. 619, Changcheng Road, Taian, Shandong, 271016, People's Republic of China
| | - Chunhao Yuan
- Department of Chemistry and Pharmaceutical Engineering, Shandong First Medical University & Shandong Academy of Medical Sciences, No. 619, Changcheng Road, Taian, Shandong, 271016, People's Republic of China
| | - Yanqing Ge
- Department of Chemistry and Pharmaceutical Engineering, Shandong First Medical University & Shandong Academy of Medical Sciences, No. 619, Changcheng Road, Taian, Shandong, 271016, People's Republic of China.
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2
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Rubina SR, Stalin PR, Meenatchi CS, Murugesan S, Kumar RR. Synthesis of epiminocyclohepta[b]pyrazolo[4,3-e]pyridines from tropinone: Fluorescent “Turn on–off” chemosensors for the sequential detection of Al3+, Cd2+ and Pb2+ in nanomolar concentration. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Hsiao PY, Chang R, Sue ACH, Chu JH, Liao GW, Lee YH, Huang JY. Synthesis and Mechanistic Investigation of Bipyrazolo[1,5- a]pyridines via Palladium-Catalyzed Cross-Dehydrogenative Coupling of Pyrazolo[1,5- a]pyridines. J Org Chem 2022; 87:9851-9863. [PMID: 35844185 DOI: 10.1021/acs.joc.2c00895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of a range of 3,3'-bipyrazolo[1,5-a]pyridine derivatives via direct cross-dehydrogenative coupling of pyrazolo[1,5-a]pyridine precursors is herein presented. This simple and efficient methodology involving palladium(II)-catalyzed C-H bond activation showed good functional group tolerance and product yield (up to 94%). Through the mechanistic insights gained from both kinetic isotope effect experimental studies and density functional theory calculations, a plausible reaction mechanism was outlined. Furthermore, subsequent derivatizations of the resulting 7,7'-diaryl-3,3'-bipyrazolo[1,5-a]pyridines, executed by performing palladium-mediated ortho C-H bond activation followed by hypervalent iodine-induced chlorination, rendered this series of compounds more extended π-conjugation and twisted conformations. Our study on these bipyrazolo[1,5-a]pyridine-based luminogens provides new opportunities for tailor-made organic luminescent materials.
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Affiliation(s)
- Pu-Yen Hsiao
- Department of Applied Science, National Taitung University, Taitung 95092, Taiwan, R.O.C
| | - Rong Chang
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Andrew C-H Sue
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jean-Ho Chu
- Department of Applied Science, National Taitung University, Taitung 95092, Taiwan, R.O.C
| | - Guan-Wei Liao
- Department of Applied Science, National Taitung University, Taitung 95092, Taiwan, R.O.C
| | - Yi-Hsin Lee
- Department of Applied Science, National Taitung University, Taitung 95092, Taiwan, R.O.C
| | - Jui-Yang Huang
- Department of Applied Science, National Taitung University, Taitung 95092, Taiwan, R.O.C
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4
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Hsiao PY, Chu JH. Novel bipyrazolo[1,5- a]pyridine luminogens with aggregation-induced emission enhancement properties. Chem Commun (Camb) 2021; 57:12281-12284. [PMID: 34730135 DOI: 10.1039/d1cc05371j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A novel 3,3'-bipyrazolo[1,5-a]pyridine molecular scaffold was obtained as a product of serendipity. Both photophysical characterisations and HOMO-LUMO theoretical calculations indicate its potential as a promising fluorophore with notable intramolecular charge transfer. Nonetheless, the emission properties of this compound suffer from the typical aggregation-caused quenching effect. To overcome this situation, we introduced additional diaryl groups onto the skeleton and synthesised a series of 7,7'-diaryl-3,3'-bipyrazolo[1,5-a]pyridines via palladium-catalysed intermolecular C-H/C-H bond cross-coupling reaction in 35-62% yields. This series of tailor-made luminogens with twisted π-structures display aggregation-induced emission enhancement properties.
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Affiliation(s)
- Pu-Yen Hsiao
- Department of Applied Science, National Taitung University, Taitung, Taiwan 95092, Taiwan.
| | - Jean-Ho Chu
- Department of Applied Science, National Taitung University, Taitung, Taiwan 95092, Taiwan.
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5
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Xu Y, Duan R, Liu H, Xia C, Duan G, Ge Y. Preparation of a Novel pH-responsive Fluorescent Probe Based on an Imidazo[1,2-a]indole Fluorophore and its Application in Detecting Extremely Low pH in Saccharomyces cerevisiae. J Fluoresc 2021; 31:1219-1225. [PMID: 34255255 DOI: 10.1007/s10895-021-02739-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/03/2021] [Indexed: 10/20/2022]
Abstract
A novel pH-responsive probe based on an imidazo[1,2-a]indole fluorophore architecture is reported. The probe was highly selective to strongly acidic pH (pKa = 3.56) with high sensitivity and a fast response time (within 30 s). The probe did not demonstrate any fluorescence changes in the presence of interfering metal ions, and it featured excellent reversibility under strongly acidic conditions. The mechanism of detection of the probe was determined to be based on intramolecular charge transfer (ICT) at different pH. The probe was also able to be used for imaging for detecting acidic pH in Saccharomyces cerevisiae.
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Affiliation(s)
- Yanhao Xu
- School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong, 271016, People's Republic of China
| | - Ruikang Duan
- Shanghai Fengxian Central Hospital, Shanghai, 201400, People's Republic of China
| | - Hao Liu
- School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong, 271016, People's Republic of China
| | - Chengcai Xia
- School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong, 271016, People's Republic of China
| | - Guiyun Duan
- School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong, 271016, People's Republic of China
| | - Yanqing Ge
- School of Pharmacy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, Shandong, 271016, People's Republic of China.
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6
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Ma C, Zhang L, Hou L, Chen F, Liu A, Ji R, Wang Q, Yuan C, Ge Y. A fluorescent probe with a large Stokes shift for sensing sulfite in dry white wine based on pyrazolo[1,5-a]pyridine fluorophore. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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7
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El‐Sayed HA, Moustafa AH, Abd El‐Salam EA. Design and synthesis of
D‐π‐A
fluorescent dyes based on nicotinonitrile and azobenzene derivatives. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3982] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hassan A. El‐Sayed
- Department of Chemistry, Faculty of ScienceZagazig University Zagazig Egypt
| | - Ahmed H. Moustafa
- Department of Chemistry, Faculty of ScienceZagazig University Zagazig Egypt
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8
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Synthesis, characterization, optical properties, computational characterizations, QTAIM analysis and cyclic voltammetry of new organic dyes for dye-sensitized solar cells. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127228] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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A FRET ratiometric fluorescent probe for detection of Hg2+ based on an imidazo[1,2-a]pyridine-rhodamine system. Anal Chim Acta 2019; 1077:243-248. [DOI: 10.1016/j.aca.2019.05.043] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/17/2019] [Indexed: 12/14/2022]
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10
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Duan G, Zhang G, Yuan S, Ji R, Zhang L, Ge Y. A pyrazolo[1,5-a]pyridine-based ratiometric fluorescent probe for sensing Cu 2+ in cell. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 219:173-178. [PMID: 31035127 DOI: 10.1016/j.saa.2019.04.057] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 04/20/2019] [Accepted: 04/20/2019] [Indexed: 06/09/2023]
Abstract
Ratiometric fluorescent probes based on FRET mechanism have attracted great attention due to their large pseudo-Stokes shifts and built-in correction for environmental effects. However, most donors failed to meet the requirement that the emission of the donor must overlap well with the absorption of the acceptor. Therefore, searching for new fluorophore to construct FRET system is in great need. In this paper, a new fluorescent dye pyrazolo[1,5-a]pyridine was synthesized and used as a donor in the FRET system for ratiometric sensing of Cu2+. The probe is based on FRET and PET mechanism. It shows high selectivity and sensitivity toward Cu2+ (detection limit 30 nM). Furthermore, it was successfully used to detect Cu2+ in Glioma cells.
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Affiliation(s)
- Guiyun Duan
- School of Chemistry and Pharmaceutical Engineering, Shandong First Medical University, Shandong Academy of Medical Sciences, Taian, Shandong 271016, PR China
| | - Gongxiao Zhang
- School of Chemistry and Pharmaceutical Engineering, Shandong First Medical University, Shandong Academy of Medical Sciences, Taian, Shandong 271016, PR China
| | - Shuqing Yuan
- The First People's Hospital of Jinan, Jinan, Shandong 250011, PR China
| | - Ruixue Ji
- School of Chemistry and Pharmaceutical Engineering, Shandong First Medical University, Shandong Academy of Medical Sciences, Taian, Shandong 271016, PR China
| | - Litao Zhang
- Department of Imaging, Taian Central Hospital, Taian, Shandong 271000, PR China
| | - Yanqing Ge
- School of Chemistry and Pharmaceutical Engineering, Shandong First Medical University, Shandong Academy of Medical Sciences, Taian, Shandong 271016, PR China.
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11
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12
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Xu Z, Chen Z, Liu A, Ji R, Cao X, Ge Y. A ratiometric fluorescent probe for detection of exogenous mitochondrial SO2 based on a FRET mechanism. RSC Adv 2019; 9:8943-8948. [PMID: 35517691 PMCID: PMC9062019 DOI: 10.1039/c8ra10328c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/12/2019] [Indexed: 11/24/2022] Open
Abstract
A novel imidazo[1,5-a]pyridine-hemicyanine based ratiometric fluorescent probe for detection of mitochondrial SO2 was designed and synthesized. The probe is based on a fluorescence resonance energy transfer (FRET) mechanism. It exhibits high selectivity and sensitivity towards SO32− with a fast response time (3 min) and detection limit of 0.13 μM. Further, it showed low cytotoxicity and was successfully applied to image exogenous mitochondrial SO2 in cells. A novel imidazo[1,5-a]pyridine-hemicyanine based ratiometric fluorescent probe for detection of mitochondrial SO2 was designed and synthesized.![]()
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Affiliation(s)
- Zhiyang Xu
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Tai'an 271000
- PR China
| | - Zhen Chen
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Tai'an 271000
- PR China
| | - Aikun Liu
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Tai'an 271000
- PR China
| | - Ruixue Ji
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Tai'an 271000
- PR China
| | - Xiaoqun Cao
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Tai'an 271000
- PR China
| | - Yanqing Ge
- School of Chemistry and Pharmaceutical Engineering
- Taishan Medical University
- Tai'an 271000
- PR China
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