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Battal A, Kassa SB, Altinolcek Gultekin N, Tavasli M, Onganer Y. A reaction-based carbazole-dicyanovinyl conjugated colorimetric and ratiometric fluorescent probe for selective detection of cyanide ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 304:123350. [PMID: 37688886 DOI: 10.1016/j.saa.2023.123350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 08/24/2023] [Accepted: 09/04/2023] [Indexed: 09/11/2023]
Abstract
In the present work, 4-(9'-hexylcarbazol-3'-yl)benzylidenemalononitrile 5 (probe L) was tested as a colorimetric and ratiometric fluorescent probe in dimethyl sulfoxide (DMSO) medium towards anions, cations and neutral molecules. The sensing properties of probe L were investigated by using UV-Vis absorption and fluorescence spectroscopy techniques. Probe L showed selectivity and sensitivity towards cyanide ions (CN-) in the presence of analytes used. Upon the addition of CN-, intramolecular charge transfer (ICT) band at 425 nm in UV spectrum disappeared. In addition, ICT emission intensity at 593 nm decreased and ligand-centred (LC) emission intensity at 480 nm increased. These findings indicate that nucleophilic conjugate addition of CN- to the dicyanovinyl group of probe L successfully occurs, hence forming a new adduct between probe L and CN-. In this adduct, π-conjugation was partially blocked, and the ICT transfer was hindered. Adduct formation was proved by Job's plot, 1H NMR and FT-IR analysis. Probe L showed very low limit of detection (LOD) value of 1.467 nM towards CN-. Probe L was also applied to the CN- detection in real-world water samples by the spike and recovery method. The maximum relative standard deviation (RSD) value was 4.24, indicating this method works successfully. Therefore, probe L could find a potential use in detection of CN- in liquid media.
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Affiliation(s)
- Ahmet Battal
- Department of Elementary School of Education, Faculty of Education, Muş Alparslan University, 49100 Muş, Turkiye
| | - Solomon Bezabeh Kassa
- Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkiye
| | - Nuray Altinolcek Gultekin
- Department of Chemistry, Faculty of Science-Art, Bursa Uludag University, 16059 Nilufer, Bursa, Turkiye
| | - Mustafa Tavasli
- Department of Chemistry, Faculty of Science-Art, Bursa Uludag University, 16059 Nilufer, Bursa, Turkiye.
| | - Yavuz Onganer
- Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkiye.
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Cao Y, Shang C, Zheng Z, Sun C. Substituent derivatives of benzothiazole-based fluorescence probes for hydrazine with conspicuous luminescence properties: A theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 279:121449. [PMID: 35660153 DOI: 10.1016/j.saa.2022.121449] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/02/2022] [Accepted: 05/27/2022] [Indexed: 06/15/2023]
Abstract
In the present work, four probe molecules for detecting hydrazine have been designed based on the 2-(4-Acetoxy-3-benzothiazole-2-yl-phenyl)-4-methyl-thiazole- 5-carboxylic acid ethyl ester (HP1) to investigate the influence of the amino and cyano groups on the excited-state intramolecular proton transfer (ESIPT) behavior and photophysical properties. The changes in hydrogen bond strength indicate that the intramolecular hydrogen bond of all probe products is enhanced upon photoexcitation. Frontier molecular orbitals (FMOs) and natural bond orbital (NBO) reveal the driving force of ESIPT. In addition, the potential energy curves and transition state theory explain the reason for the single fluorescence phenomenon in the experiment. The simulated absorption and fluorescence spectra of HP1 and its product (HPP1) are completely consistent with the experimental results, which also verify the viewpoint. Meanwhile the cyano derivative HPP4 exhibits a larger Stokes-shift (201 nm) than that of HPP1 (145 nm) and has the same low energy barrier as HPP1. These excellent properties allow HPP4 to be a fluorescent probe with superior performance than the original molecule. In conclusion, this work can provide a theoretical basis for the design and synthesis of more sensitive fluorescent probes for the detection of hydrazine.
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Affiliation(s)
- Yunjian Cao
- College of Science, Northeast Forestry University, Harbin 150040, China
| | - Changjiao Shang
- College of Science, Northeast Forestry University, Harbin 150040, China
| | - Zefei Zheng
- Aulin College, Northeast Forestry University, Harbin 150040, China
| | - Chaofan Sun
- College of Science, Northeast Forestry University, Harbin 150040, China.
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Ligiero CBP, Fernandes TS, D'Amato DL, Gaspar FV, Duarte PS, Strauch MA, Fonseca JG, Meirelles LGR, Bento da Silva P, Azevedo RB, Aparecida de Souza Martins G, Archanjo BS, Buarque CD, Machado G, Percebom AM, Ronconi CM. Influence of particle size on the SARS-CoV-2 spike protein detection using IgG-capped gold nanoparticles and dynamic light scattering. MATERIALS TODAY. CHEMISTRY 2022; 25:100924. [PMID: 35475288 PMCID: PMC9023328 DOI: 10.1016/j.mtchem.2022.100924] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 03/27/2022] [Accepted: 03/29/2022] [Indexed: 05/03/2023]
Abstract
Due to the unprecedented and ongoing nature of the coronavirus outbreak, the development of rapid immunoassays to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and its highly contagious variants is an important and challenging task. Here, we report the development of polyclonal antibody-functionalized spherical gold nanoparticle biosensors as well as the influence of the nanoparticle sizes on the immunoassay response to detect the SARS-CoV-2 spike protein by dynamic light scattering. By monitoring the increment in the hydrodynamic diameter (ΔDH) by dynamic light scattering measurements in the antigen-antibody interaction, SARS-CoV-2 S-protein can be detected in only 5 min. The larger the nanoparticles, the larger ΔDH in the presence of spike protein. From adsorption isotherm, the calculated binding constant (K D ) was 83 nM and the estimated limit of detection was 13 ng/mL (30 pM). The biosensor was stable up to 90 days at 4 °C. Therefore, the biosensor developed in this work could be potentially applied as a fast and sensible immunoassay to detect SARS-CoV-2 infection in patient samples.
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Affiliation(s)
- C B P Ligiero
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Campus Do Valonguinho, Outeiro de São João Batista, S/n, 24020-141, Niterói, RJ, Brazil
| | - T S Fernandes
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Campus Do Valonguinho, Outeiro de São João Batista, S/n, 24020-141, Niterói, RJ, Brazil
| | - D L D'Amato
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Campus Do Valonguinho, Outeiro de São João Batista, S/n, 24020-141, Niterói, RJ, Brazil
| | - F V Gaspar
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Campus Do Valonguinho, Outeiro de São João Batista, S/n, 24020-141, Niterói, RJ, Brazil
- Departamento de Química, Pontifícia Universidade Católica Do Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, 22451-900, Brazil
| | - P S Duarte
- Departamento de Química, Pontifícia Universidade Católica Do Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, 22451-900, Brazil
| | - M A Strauch
- Gerência de Desenvolvimento Tecnológico, Instituto Vital Brazil, Niterói, RJ, 24230-410, Brazil
| | - J G Fonseca
- Gerência de Desenvolvimento Tecnológico, Instituto Vital Brazil, Niterói, RJ, 24230-410, Brazil
| | - L G R Meirelles
- Fazenda Instituto Vital Brazil, Niterói, RJ, 24230-410, Brazil
| | - P Bento da Silva
- Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
| | - R B Azevedo
- Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, 70910-900, Brazil
| | - G Aparecida de Souza Martins
- Programa de Pós-graduação Em Ciência e Tecnologia de Alimentos, Universidade Federal Do Tocantins, 77001-090, Brazil
| | - B S Archanjo
- Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia (Inmetro), Duque de Caxias, RJ, 25250-020, Brazil
| | - C D Buarque
- Departamento de Química, Pontifícia Universidade Católica Do Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, 22451-900, Brazil
| | - G Machado
- Centro de Tecnologias Estratégicas Do Nordeste, Av. Prof. Luiz Freire 01, Recife, Pernambuco, 50740-540, Brazil
| | - A M Percebom
- Departamento de Química, Pontifícia Universidade Católica Do Rio de Janeiro (PUC-Rio), Rio de Janeiro, RJ, 22451-900, Brazil
| | - C M Ronconi
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Campus Do Valonguinho, Outeiro de São João Batista, S/n, 24020-141, Niterói, RJ, Brazil
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