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Theetharappan M, Neelakantan MA. A Water-Soluble Schiff Base Turn-on Fluorescent Chemosensor for the Detection of Al 3+ and Zn 2+ Ions at the Nanomolar Level: Application in Live-Cell Imaging. J Fluoresc 2021; 31:1277-1290. [PMID: 34050881 DOI: 10.1007/s10895-021-02756-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 05/20/2021] [Indexed: 10/21/2022]
Abstract
A water-soluble Schiff base, 2,3-bis((E)-(2-hydroxy-3-methoxybenzylidene)amino) propanoic acid (ODA) prepared by condensing o-vanillin and DL-2,3-diaminopropionic acid was evaluated as an efficient "turn on" fluorescent chemosensor for the selective recognition of Al3+ and Zn2+ ions in presence of several interfering metal ions (detection limit; for Al3+ = 1.82 nM, Zn2+ = 7.06 nM). The probe also shows a selective chromogenic behavior towards Al3+ and Zn2+ ions that the naked eye can view. The binding stoichiometry was determined using 1H-NMR titration and ESI-MS spectrometry. The sensing mechanism is due to the inhibition of ESIPT and isomerization of -C=N of ODA on complexation with Al3+/Zn2+. The intramolecular hydrogen bonding energy and the critical bond energy in ODA-Al3+/Zn2+ were calculated using QTAIM analysis. The Thin Layer Chromatography (TLC) plates and strip papers loaded with ODA were used to test the practical applications for sensing Al3+ and Zn2+ ions. Moreover, the probe has been used for live-cell imaging to detect Al3+ and Zn2+ ions in hepatoma C3A and human glioblastoma U87 cells.
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Affiliation(s)
- Murugan Theetharappan
- Chemistry Research Centre, National Engineering College, K. R. Nagar, Kovilpatti, Thoothukudi District, Tamil Nadu, 628503, India
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Hussain M, Niu C, Wang GW. Palladium-catalyzed synthesis of [60]fullerene-fused furochromenones and further electrochemical functionalization. Org Chem Front 2020. [DOI: 10.1039/d0qo00264j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The palladium-catalyzed heteroannulation of [60]fullerene with 4-hydroxycoumarins affords [60]fullerene-fused furochromenones, which can be further derivatized via an electrochemical method to synthesize 1,2,3,4-adducts.
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Affiliation(s)
- Majid Hussain
- CAS Key Laboratory of Soft Matter Chemistry
- Hefei National Laboratory for Physical Sciences at Microscale
- and Department of Chemistry
- University of Science and Technology of China
- Hefei
| | - Chuang Niu
- CAS Key Laboratory of Soft Matter Chemistry
- Hefei National Laboratory for Physical Sciences at Microscale
- and Department of Chemistry
- University of Science and Technology of China
- Hefei
| | - Guan-Wu Wang
- CAS Key Laboratory of Soft Matter Chemistry
- Hefei National Laboratory for Physical Sciences at Microscale
- and Department of Chemistry
- University of Science and Technology of China
- Hefei
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Kumawat LK, Abogunrin AA, Kickham M, Pardeshi J, Fenelon O, Schroeder M, Elmes RBP. Squaramide-Naphthalimide Conjugates as "Turn-On" Fluorescent Sensors for Bromide Through an Aggregation-Disaggregation Approach. Front Chem 2019; 7:354. [PMID: 31192187 PMCID: PMC6540876 DOI: 10.3389/fchem.2019.00354] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 04/29/2019] [Indexed: 11/13/2022] Open
Abstract
The syntheses of two new squaramide-naphthalimide conjugates (SQ1 and SQ2) are reported where both compounds have been shown to act as selective fluorescence "turn on" probes for bromide in aqueous DMSO solution through a disaggregation induced response. SQ1 and SQ2 displayed a large degree of self-aggregation in aqueous solution that is disrupted at increased temperature as studied by 1H NMR and Scanning Electron Microscopy (SEM). Moreover, the fluorescence behavior of both receptors was shown to be highly dependent upon the aggregation state and increasing temperature gave rise to a significant increase in fluorescence intensity. Moreover, this disaggregation induced emission (DIE) response was exploited for the selective recognition of certain halides, where the receptors gave rise to distinct responses related to the interaction of the various halide anions with the receptors. Addition of F- rendered both compounds non-emissive; thought to be due to a deprotonation event while, surprisingly, Br- resulted in a dramatic 500-600% fluorescence enhancement thought to be due to a disruption of compound aggregation and allowing the monomeric receptors to dominate in solution. Furthermore, optical sensing parameters such as limits of detection and binding constant of probes were also measured toward the various halides (F-, Cl-, Br-, and I-) where both SQ1 and SQ2 were found to sense halides with adequate sensitivity to measure μM levels of halide contamination. Finally, initial studies in a human cell line were also conducted where it was observed that both compounds are capable of being taken up by HeLa cells, exhibiting intracellular fluorescence as measured by both confocal microscopy and flow cytometry. Finally, using flow cytometry we were also able to show that cells treated with NaBr exhibited a demonstrable spectroscopic response when treated with either SQ1 or SQ2.
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Affiliation(s)
- Lokesh K Kumawat
- Department of Chemistry, Maynooth University, National University of Ireland, Maynooth, Ireland
| | - Anthony A Abogunrin
- Department of Chemistry, Maynooth University, National University of Ireland, Maynooth, Ireland
| | - Michelle Kickham
- Department of Chemistry, Maynooth University, National University of Ireland, Maynooth, Ireland.,Department of Biology, Maynooth University, National University of Ireland, Maynooth, Ireland
| | - Jyotsna Pardeshi
- Department of Biology, Maynooth University, National University of Ireland, Maynooth, Ireland
| | - Orla Fenelon
- Department of Chemistry, Maynooth University, National University of Ireland, Maynooth, Ireland
| | - Martina Schroeder
- Department of Biology, Maynooth University, National University of Ireland, Maynooth, Ireland.,Maynooth University Human Health Research Institute, Maynooth University, National University of Ireland, Maynooth, Ireland
| | - Robert B P Elmes
- Department of Chemistry, Maynooth University, National University of Ireland, Maynooth, Ireland.,Maynooth University Human Health Research Institute, Maynooth University, National University of Ireland, Maynooth, Ireland
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Murugan AS, Pandi M, Annaraj J. A Single and Simple Receptor as a Multifunctional Chemosensor for the Al3+/Cu2+ions and Its Live Cell Imaging Applications. ChemistrySelect 2017. [DOI: 10.1002/slct.201601646] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Arumugam Senthil Murugan
- Department of Materials Science, School of Chemistry; Madurai Kamaraj University; Madurai- 625 021 India
| | - Mohan Pandi
- School of Biotechnology; Madurai Kamaraj University; Madurai- 625 021 India
| | - Jamespandi Annaraj
- Department of Materials Science, School of Chemistry; Madurai Kamaraj University; Madurai- 625 021 India
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Fu Y, Tu Y, Fan C, Zheng C, Liu G, Pu S. A highly sensitive fluorescent sensor for Al3+and Zn2+based on a diarylethene salicylhydrazide Schiff base derivative and its bioimaging in live cells. NEW J CHEM 2016. [DOI: 10.1039/c6nj01458e] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new photochromic diarylethene based sensor with a salicylhydrazide Schiff base displayed a dual-mode with a “turn on” fluorescence response and color changes upon addition of Al3+or Zn2+.
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Affiliation(s)
- Yinglong Fu
- Jiangxi Key Laboratory of Organic Chemistry
- Jiangxi Science and Technology Normal University
- Nanchang
- P. R. China
| | - Yayi Tu
- Jiangxi Key Laboratory of Organic Chemistry
- Jiangxi Science and Technology Normal University
- Nanchang
- P. R. China
| | - Congbin Fan
- Jiangxi Key Laboratory of Organic Chemistry
- Jiangxi Science and Technology Normal University
- Nanchang
- P. R. China
| | - Chunhong Zheng
- Jiangxi Key Laboratory of Organic Chemistry
- Jiangxi Science and Technology Normal University
- Nanchang
- P. R. China
| | - Gang Liu
- Jiangxi Key Laboratory of Organic Chemistry
- Jiangxi Science and Technology Normal University
- Nanchang
- P. R. China
| | - Shouzhi Pu
- Jiangxi Key Laboratory of Organic Chemistry
- Jiangxi Science and Technology Normal University
- Nanchang
- P. R. China
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