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Sanaul Islam M, Hoque A, Mohamed Yusuf Baig K, Sarmin M, Kole GK, Hoda M, Akhtarul Alam M. A zwitterionic probe for ratiometric fluorescent detection of aluminium(III) ion in aqueous medium and its application in bioimaging. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 311:124005. [PMID: 38341932 DOI: 10.1016/j.saa.2024.124005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/12/2023] [Accepted: 02/05/2024] [Indexed: 02/13/2024]
Abstract
In the present study, we have synthesized an aminobenzoic acid containing Schiff base (compound 1) and its structure was confirmed through single crystal X-ray study. Importantly, the compound 1 crystallizes in the zwitterionic form, with an anionic carboxylate group (-COO-) and a cationic iminium group (-C = NH+-). The compound 1 is highly soluble in water due to its zwitterionic feature in the solid state. Interestingly, compound 1 acts as a ratiometric fluorescent probe for the selective detection of Al3+ ion in aqueous solution without organic cosolvent. It can also detect Al3+ ion by visual colour change to bluish-green fluorescence under 365 nm UV light. The association constant between compound 1 with Al3+ ion was estimated to be 1.67 × 104 M-1. The lowest detection limit for Al3+ ion was calculated to be 7.05 × 10-8 M in water. Compound 1 in combination with Al3+ ion demonstrated fluorescent imaging potential of the nucleus of in RAW 264.7 murine macrophage cell line. In addition, the sensing model is developed as paper based sensor ''Test Kit' 'for its practical applicability.
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Affiliation(s)
- Md Sanaul Islam
- Department of Chemistry, Aliah University, Action Area IIA/27, New Town, Kolkata 700160, India
| | - Anamika Hoque
- Department of Chemistry, Aliah University, Action Area IIA/27, New Town, Kolkata 700160, India
| | - K Mohamed Yusuf Baig
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - Monalisha Sarmin
- Nanotechnology and Applied Phytochemistry Laboratory, Department of Biological Sciences, Aliah University, Action Area IIA/27, New Town, Kolkata 700160, India
| | - Goutam Kumar Kole
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India.
| | - Muddasarul Hoda
- Nanotechnology and Applied Phytochemistry Laboratory, Department of Biological Sciences, Aliah University, Action Area IIA/27, New Town, Kolkata 700160, India.
| | - Md Akhtarul Alam
- Department of Chemistry, Aliah University, Action Area IIA/27, New Town, Kolkata 700160, India.
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2
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Ghosh S, Mahato S, Dutta T, Ahamed Z, Ghosh P, Roy P. Highly selective, sensitive and biocompatible rhodamine-based isomers for Al 3+ detection: A comparative study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123455. [PMID: 37813088 DOI: 10.1016/j.saa.2023.123455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 10/11/2023]
Abstract
Selective detection of a metal ion with high selectivity is of great importance to understand its existence and its role in many chemical and biological processes. We report here the synthesis, characterization and Al3+ sensing properties of two rhodamine-based isomers, (E)-2-((2-(allyloxy)benzylidene)amino)ethyl)-3',6'-bis(ethylamine)-2',7'-dimethylspiro[isoindoline-1,9'-xanthen]-3-one (L-2-oxy) and (E)-2-((4-(allyloxy)benzylidene)amino)ethyl)-3',6'-bis(ethylamine)-2',7'-dimethylspiro[isoindoline-1,9'-xanthen]-3-one (L-4-oxy). L-2-oxyand L-4-oxy show pink coloration, significant enhancement in absorbance at 530 nm and fluorescence intensity at 553 nm in the presence of Al3+ among several cations. Quantum yield and lifetime of the probes increase in the presence of Al3+. LOD values have been determined as low as ∼1.0 nM for both the isomers. DFT study suggests that the cation induces opening of spirolactam ring resulting in the changes of the rhodamine dyes. Additional reason could be Chelation Enhanced Fluorescence (CHEF) effect due to the subsequent chelation of the metal ion. Between two isomers, L-2-oxy displays better sensing ability towards Al3+ in terms of fluorescence enhancement, limit of detection, lifetime enhancement. Both the probes have been utilized in cell imaging studies using rat skeletal myoblast cell line (L6 cell line).
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Affiliation(s)
- Sneha Ghosh
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata 700032, India
| | - Shephali Mahato
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata 700032, India
| | - Tiasha Dutta
- Department of Ecological Studies & International Centre for Ecological Engineering (ICEE), University of Kalyani, Kalyani, Nadia 741235, West Bengal, India
| | - Zisan Ahamed
- Department of Ecological Studies & International Centre for Ecological Engineering (ICEE), University of Kalyani, Kalyani, Nadia 741235, West Bengal, India
| | - Pritam Ghosh
- Chemistry Division, School of Advanced Sciences, Vellore Institute of Technology, Chennai Campus, Chennai 600127, Tamil Nadu, India
| | - Partha Roy
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata 700032, India.
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3
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Panda SK, Sahu RP, Goswami C, Singh AK. Robust Optical Detection of Ga 3+ by a Rhodamine- and Coumarin-Based Proficient Probe: Theoretical Investigations and Biological Applications. ACS APPLIED BIO MATERIALS 2023; 6:5582-5595. [PMID: 37971315 DOI: 10.1021/acsabm.3c00772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The present investigation highlights a rhodamine-B- and coumarin-based efficient probe that selectively detects Ga3+ over other metal ions. The active pocket of the ligand for trapping the metal ions and the binding stoichiometry of its Ga3+ complex were discovered by single-crystal X-ray diffraction (SC-XRD) analysis. This binding stoichiometry was further confirmed in the solution state by mass spectrometry and Job's plot. The detection limit was found to be at the nanomolar level. Pyrophosphate being a well-known quencher could easily quench the fluorescence intensity of the RC in the presence of Ga3+ and reversibly recognize Ga3+ in the solution. The spiro ring opening of the ligand after Ga3+ insertion is proposed to be the principal mechanism for the turn-on fluorescence response. This ring opening was confirmed by SC-XRD data and nuclear magnetic resonance (NMR) titration experiments. Both ground- and excited-state calculations of the ligand and complex have been carried out to obtain information about their energy levels and to obtain the theoretical electronic spectra. Furthermore, the live-cell imaging of the probe only and the probe after the addition of Ga3+ have been carried out in HaCaT cells and satisfactory responses were observed. Interestingly, with the help of this probe, Ga3+ can be tracked inside the intracellular organelle such as lysosomes along with other regions of the cell. The article highlights a rhodamine-coumarin-based probe for the detection of Ga3+ over other metal ions with a nanomolar level detection limit. Structural characterization of the ligand and its Ga3+ complex was investigated by SC-XRD. Density functional theory (DFT) and time-dependent DFT (TD-DFT) studies were carried out to explore the excited-state energies and electronic spectra. The application of the probe for the detection of Ga3+ in live cells has been explored, and positive responses were observed.
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Affiliation(s)
- Suvam Kumar Panda
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Khordha 752050, India
| | - Ram Prasad Sahu
- School of Biological Sciences, National Institute of Science Education and Research, Khordha 752050, India
| | - Chandan Goswami
- School of Biological Sciences, National Institute of Science Education and Research, Khordha 752050, India
| | - Akhilesh Kumar Singh
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Khordha 752050, India
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Satheeshkumar K, Saravanakumar P, Kalavathi A, Vennila KN, Elango KP. Spectroscopic and TD-DFT studies on the chromo-fluorogenic detection of cyanide ions in organic and aquo-organic media. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 302:123054. [PMID: 37364411 DOI: 10.1016/j.saa.2023.123054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/06/2023] [Accepted: 06/19/2023] [Indexed: 06/28/2023]
Abstract
A new naked-eye chromogenic and fluorogenic probe KS5 has been developed for the detection of CN- ions in neat DMSO and H2O:DMSO (1:1 v/v) media. The probe KS5 exhibited selectivity towards CN- and F- ions in organic and high selectivity towards CN- ions in aquo-organic media resulting in a colour change from brown to colourless and a turn-on fluorescence response. The probe could able to detect CN- ions via a deprotonation process, which was conceived by consecutive addition of hydroxide and hydrogen ions and confirmed using 1H NMR studies. The limit of detection (LOD) of KS5 towards CN- ions were in the range of 0.07-0.62 µM in both these solvent systems. Suppression of intra-molecular charge transfer (ICT) transition and photoinduced electron transfer (PET) process of KS5 by the added CN- ions are responsible for the chromogenic and fluorogenic changes observed, respectively. Density Functional Theory (DFT) and Time-Dependent Density Functional Theory (TD-DFT) calculations strongly supported the proposed mechanism along with the optical properties of the probe before and after the addition of CN- ions. To prove the practical applicability, KS5 was successfully utilized to detect CN- ions in cassava powder and bitter almonds as well as to determine CN- ions in various real water samples.
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Affiliation(s)
- K Satheeshkumar
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram 624302, India
| | - P Saravanakumar
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram 624302, India
| | - A Kalavathi
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram 624302, India
| | - K N Vennila
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram 624302, India
| | - Kuppanagounder P Elango
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram 624302, India.
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Musikavanhu B, Huang Z, Ma Q, Liang Y, Xue Z, Feng L, Zhao L. A pyridine modified naphthol hydrazone Schiff base chemosensor for Al 3+ via intramolecular charge transfer process. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 301:122961. [PMID: 37290147 DOI: 10.1016/j.saa.2023.122961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/25/2023] [Accepted: 05/30/2023] [Indexed: 06/10/2023]
Abstract
A pyridine modified naphthol hydrazone Schiff base chemosensor, NaPy, was prepared in a two-step process to detect aluminum ion (Al3+) in different samples. The probe shows a turn-off emission response towards Al3+ at a 1:1 binding stoichiometry via intramolecular charge transfer (ICT) mechanism, as validated by density functional theory (DFT) calculations and a series of spectroscopic measurements. The response time is slightly over one minute with a limit of detection (LOD) value of 0.164 µM, demonstrating the great sensitivity of the probe. It is also found that NaPy exhibits high selectivity towards Al3+ and resists interference from seventeen other cations. Application investigations in paper strips, water samples and HeLa cells suggest that NaPy can be used as an efficient probe for sensing Al3+ in real environmental samples and biosystems.
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Affiliation(s)
- Brian Musikavanhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Zeping Huang
- Monash Suzhou Research Institute, Monash University, Suzhou Industrial Park, Suzhou 215000, China; Jiangsu Key Laboratory of Neuropsychiatric Diseases, Institute of Neuroscience, Soochow University, Suzhou 215123, China
| | - Quanhong Ma
- Jiangsu Key Laboratory of Neuropsychiatric Diseases, Institute of Neuroscience, Soochow University, Suzhou 215123, China
| | - Yongdi Liang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China
| | - Zhaoli Xue
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
| | - Lei Feng
- Monash Suzhou Research Institute, Monash University, Suzhou Industrial Park, Suzhou 215000, China.
| | - Long Zhao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
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Bari S, Maity D, Dutta T, Biswas K, Roy P. Modulation of aluminum sensing properties of a sulphone group containing chemosensor and its biological applications. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 301:122981. [PMID: 37321137 DOI: 10.1016/j.saa.2023.122981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/02/2023] [Accepted: 06/02/2023] [Indexed: 06/17/2023]
Abstract
A chemosensor with two binding pockets facilitates binding of one metal ion in either of the pockets providing a better chance for the interaction and hence recognition of the cation. We report here a chemosensor, namely 2,2'-(1E)-(5,5'-sulfonylbis(2-hydroxy-5,1-phenylene))bis(azan-1-yl-1-ylidene)bis(methan-1-yl-1-ylidene)dinaphthalen-1-ol (H4L-naph), for selective sensing of Al3+ in DMF- HEPES buffer (1:4, v/v, pH 7.4). It shows almost 100-fold fluorescence enhancement at 532 nm (λex = 482 nm) in the presence of Al3+. Its quantum yield and excited state lifetime enhances significantly with the cations. H4L-naph forms a 1:2 complex with Al3+ with an association constant value of 2.18 × 104 M-2. Fluorescence enhancement may be attributed to CHEFF mechanism and restriction of >CN isomerization. Effect of the presence of naphthyl rings instead phenyl ring of a previously reported probe has resulted shifting of excitation/emission peak towards longer wavelength. The probe has been applied to image Al3+ in L6 cells with no significant cytotoxicity.
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Affiliation(s)
- Sibshankar Bari
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata 700032, India
| | - Dinesh Maity
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata 700032, India; Department of Chemistry, Government General Degree College, Mangalkote, Purba Bardhaman, West Bengal 713132, India
| | - Tiasha Dutta
- Department of Ecological Studies & International Centre for Ecological Engineering (ICEE), University of Kalyani, Kalyani, Nadia 741235, West Bengal, India
| | - Koyel Biswas
- Department of Ecological Studies & International Centre for Ecological Engineering (ICEE), University of Kalyani, Kalyani, Nadia 741235, West Bengal, India
| | - Partha Roy
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata 700032, India.
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7
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Musikavanhu B, Zhu D, Tang M, Xue Z, Wang S, Zhao L. A naphthol hydrazone Schiff base bearing benzothiadiazole unit for fluorescent detection of Fe 3+ in PC3 cells. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 289:122242. [PMID: 36542920 DOI: 10.1016/j.saa.2022.122242] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 11/21/2022] [Accepted: 12/12/2022] [Indexed: 06/17/2023]
Abstract
Naphthol hydrazone derivatives are recognized as efficient chelating agents for both qualitative and quantitative detection of metal ions. Here we design a naphthol hydrazine-based chemosensor with covalently linking a strong electron-withdrawing benzothiadiazole group to modulate the molecular electronic structure, nominated as NtHzBtd. The fluorescent probe performs excellent selectivity and sensitivity towards Fe3+ with 1:1 binding stoichiometry, while exhibiting a quick response at 55 s with a relatively low limit of detection of 0.036 µM. A series of spectroscopic measurements in tandem with theoretical calculations suggest that the probe undergoes both intramolecular charge transfer (ICT) and chelation enhanced quenching (CHEQ) processes. Successful color rendering of paper strips and bioimaging in PC3 cells demonstrate the promising applicability of NtHzBtd for portable Fe3+ detection in real samples and biosystems.
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Affiliation(s)
- Brian Musikavanhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Dongwei Zhu
- Department of Immunology, Jiangsu Key Laboratory of Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, China; Department of Laboratory Medicine, The Affiliated People's Hospital, Jiangsu University, Zhenjiang 212013, China
| | - Mengran Tang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhaoli Xue
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shengjun Wang
- Department of Immunology, Jiangsu Key Laboratory of Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang 212013, China; Department of Laboratory Medicine, The Affiliated People's Hospital, Jiangsu University, Zhenjiang 212013, China
| | - Long Zhao
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
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A New Azo-Schiff Base Dual-mode Chemosensor: Colorimetric Detection of Cobalt Ions and Fluorometric Detection of Aluminum Ions in Aqueous Ethanol Solution. J Fluoresc 2023; 33:527-538. [PMID: 36449226 DOI: 10.1007/s10895-022-03099-7] [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: 05/05/2022] [Accepted: 11/21/2022] [Indexed: 12/03/2022]
Abstract
A new Azo-Schiff base ligand (H2L) was designed and synthesized as a cation chemosensor. The chemosensor H2L as dual chemosensor showed selective fluorescence recognition of Al3+ with a noticeable fluorescence enhancement and colorimetric detection of Co2 + in aqueous ethanol solution. The H2L exhibits a linear response toward Al3+ ions in the concentration range of 1.91 × 10-8 M to 4.8 × 10-6 M with a limit of detection of 1.91 × 10-8 M. The sensing mechanism of sensor H2L toward Al3+ was investigated by 1H NMR and IR spectroscopies. Fluorescence switch based on the control of EDTA and Al3+ proved H2L could act as a reversible chemosensor. The molecular structure of [NiL] complex has been determined by X-ray crystallography.
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A pyrazole derived “off-on-off” fluorescence sensor for sequential detection of Al3+ and Fe3+. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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Kumar Panda S, Kumar Singh A. Combined experimental and TD-DFT study of a highly sensitive AIE-based probe for the detection of water in organic solvents and its application in inkless writing. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Abdollahi-Moghadam M, Keypour H, Azadbakht R, Koolivand M. An experimental and theoretical study of a new sensitive and selective Al3+ Schiff base fluorescent chemosensor bearing a homopiperazine moiety. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Rajimon K, Elangovan N, Amir Khairbek A, Thomas R. Schiff bases from chlorine substituted anilines and salicylaldehyde: Synthesis, characterization, fluorescence, thermal features, biological studies and electronic structure investigations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Xie L, Wang X, Yao RH, Fan TT, Chen XX, Fan CB, Pu SZ. A Novel “Turn-on” Triphenylamine-Based Fluorescent Probe for Ultrasensitive Detection of Al3+ and Its Application on Test Strips. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022120119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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14
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Spectroscopic and DFT/TD-DFT studies on selective and sensitive fluorescent detection of Al(III) ion. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Zhai H, Zhu M, Jia X, Liu Y, Guan T, Yang Y, Liu Y. Theoretical investigation on the fluorescence properties and ESIPT mechanism of the Al 3+ ion sensor 1-((2-hydroxynaphthalen-1-yl)methylene)urea(OCN). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 277:121237. [PMID: 35468374 DOI: 10.1016/j.saa.2022.121237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/21/2022] [Accepted: 04/02/2022] [Indexed: 06/14/2023]
Abstract
A new action mechanism for the fluorescent detection on the Al3+ ion of the sensitive 1-((2-hydroxynaphthalen-1-yl)methylene)urea(OCN) is theoretically studied. The extensive theoretical calculations on the OCN and the isomer structure OCN-T are performed. The emission and absorption spectra consistent with the experiment value. The absorption spectra peaks (362 nm and 326 nm) of OCN and OCN-T molecules are attributed to the experimentally observed absorption spectra at 356 nm and 314 nm, respectively. The calculated fluorescence value of the OCN-AL structure is 460 nm, while the OCN-T-AL structure has no fluorescence. These results better explain that OCN and its isomers OCN-T are involved in the absorption, and the detection spectrum signal is emitted from the OCN-AL complex. The OCN and OCN-T molecules are obvious hydrogen bonding systems. The excited state intramolecular proton transfer photochemical behaviors and detecting Al3+ ion photophysical changes were explained for the first time at the molecular level. As driving force of excited state intramolecular proton transfer (ESIPT) reaction, the bond parameters and vibrational frequencies of intramolecular hydrogen bond were analyzed by optimizing structures and calculating infrared spectra, analysis of frontier molecular orbitals. To further elucidate the proton transfer reactive paths, the scanned the potential energy curves (PECs) of OCN and OCN-T chemosensor in different electronic states are plotted. This work proposes a reasonable explanation for the detection mechanism of the OCN sensor.
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Wang B, Xu W, Gan K, Xu K, Chen Q, Wei W, Wu W. On the synthesis and performance of a simple colorimetric and fluorescent chemosensor for Cu 2+ with good reversibility. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 277:121245. [PMID: 35439672 DOI: 10.1016/j.saa.2022.121245] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/23/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
A colorimetric and fluorescent chemosensor (CS1) for Cu2+ based on the mechanism of internal charge transfer (ICT) has been successfully designed and prepared by simple condensation of 4_(diethylamino)salicylaldehyde and oxalyl dihydrazide. Cu2+ in solution (DMSO/H2O = 7:3, v/v) by 5 mM NaAc-HAc at pH 7.0 was determined through dual channels: (1) "naked-eye" observation, a visually dramatic color change from light green to orange, which can be used for qualitative determination of Cu2+; (2) spectrofluorometry, which can quantificationally assay Cu2+. It provides a simple-to-use platform for reliable detection of Cu2+ at concentrations ranging from 5.0 × 10-7 to 1.1 × 10-5 M with detection limit of 1.2 × 10-7 M, which is nearly 2 × 102 times lower than the maximum allowable level of inorganic Cu2+ in drinking water (1.3 ppm, ∼20 µM) permitted by the EPA (Environmental Protection Agency), and the sensing detection of Cu2+ ions was reversible.
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Affiliation(s)
- Bin Wang
- Department of Orthopaedics, Hwa Mei Hospital, University of Chinese Academy of Sciences, 315010 Ningbo, PR China; Ningbo Institute of Life and Health, University of Chinese Academy of Sciences, 315010 Ningbo, PR China
| | - Weiling Xu
- Department of Nuclear Medicine, Ningbo First Hospital, Ningbo, PR China
| | - Kaifeng Gan
- Department of Orthopaedics, Ningbo Medical Center Lihuili Hospital, Medical School, Ningbo University, Ningbo, PR China
| | - Ke Xu
- Department of Orthopaedics, Hwa Mei Hospital, University of Chinese Academy of Sciences, 315010 Ningbo, PR China; Ningbo Institute of Life and Health, University of Chinese Academy of Sciences, 315010 Ningbo, PR China
| | - Qiaojie Chen
- Department of Orthopaedics, Hwa Mei Hospital, University of Chinese Academy of Sciences, 315010 Ningbo, PR China; Ningbo Institute of Life and Health, University of Chinese Academy of Sciences, 315010 Ningbo, PR China
| | - Wei Wei
- Department of Urology, Hwa Mei Hospital, University of Chinese Academy of Sciences, 315010 Ningbo, PR China.
| | - Wei Wu
- Department of Orthopaedics, Hwa Mei Hospital, University of Chinese Academy of Sciences, 315010 Ningbo, PR China; Ningbo Institute of Life and Health, University of Chinese Academy of Sciences, 315010 Ningbo, PR China.
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Santra A, Mishra S, Panda SK, Singh AK. ESIPT and PET-based easy-to-synthesize unsymmetrical ligand in the reversible fluorimetric sensing of Al3+ and relay sensing of inorganic and biological phosphates. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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18
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