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Durairaju P, Umarani C, Rajabather JR, Alanazi AM, Periyasami G, Wilson LD. Synthesis and Characterization of Pyridine-Grafted Copolymers of Acrylic Acid-Styrene Derivatives for Antimicrobial and Fluorescence Applications. MICROMACHINES 2021; 12:672. [PMID: 34201351 PMCID: PMC8230187 DOI: 10.3390/mi12060672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 11/16/2022]
Abstract
The goal of the present study was to copolymerize 3-(4-acetylphenylcarbamoyl) acrylic acid and styrene using azo-bis-isobutyronitrile (AIBN) as a catalyst. The resulting copolymers exhibited number average molecular weights (Mn) of 3.73-5.23 × 104 g/mol with a variable polydispersity (PDI = 2.3-3.8). The amide group of the PMA/PSA polymer was used for grafting poly (-styrene-maleic acid substituted aromatic 2-aminopyridine) by the Hantzsch reaction using a substituted aromatic aldehyde, malononitrile, and ammonium acetate. The polymer can emit strong blue fluorescence (λ = 510 nm) and its thermal stability and solubility were enhanced by polymer grafting. Moreover, the polymer showed the fluorescence spectra of the copolymer had a strong, broad emission band between 300 to 550 nm (maximum wavelength 538 nm) under excitation at 293 nm. The Hantzsch reaction yields an interesting class of nitrogen-based heterocycles that combine with a synthetic strategy for synthesis of grafted co-polymer pyridine-styrene derivatives. The as-prepared pyridine-based polymer compounds were screened against Gram-positive and Gram-negative bacteria, where a maximum inhibition zone toward all four types of bacteria was observed, including specific antifungal activity. Herein, a series of pyridine compounds were synthesized that showed enhanced fluorescent properties and antimicrobial properties due to their unique structure and ability to form polymer assemblies.
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Affiliation(s)
- Periyan Durairaju
- Department of Chemistry, Thiruvalluvar Government Arts College, Rasipuram 636007, Tamilnadu, India
- Department of Chemistry, Government Arts College (Autonomous), Salem 636007, Tamilnadu, India;
| | - Chinnasamy Umarani
- Department of Chemistry, Government Arts College (Autonomous), Salem 636007, Tamilnadu, India;
| | - Jothi Ramalingam Rajabather
- Chemistry Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia; (J.R.R.); (G.P.)
| | - Amer M. Alanazi
- Pharmaceutical Chemistry Department, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Govindasami Periyasami
- Chemistry Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia; (J.R.R.); (G.P.)
| | - Lee D. Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place—Room 165 Thorvaldson Bldg., Saskatoon, SK S7N 5C9, Canada
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Carreño A, Gacitúa M, Solis-Céspedes E, Páez-Hernández D, Swords WB, Meyer GJ, Preite MD, Chávez I, Vega A, Fuentes JA. New Cationic fac-[Re(CO) 3(deeb)B2] + Complex, Where B2 Is a Benzimidazole Derivative, as a Potential New Luminescent Dye for Proteins Separated by SDS-PAGE. Front Chem 2021; 9:647816. [PMID: 33842435 PMCID: PMC8027506 DOI: 10.3389/fchem.2021.647816] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 01/29/2021] [Indexed: 01/14/2023] Open
Abstract
Sodium-dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) can be used to separate proteins based mainly on their size such as in denaturing gels. Different staining methods have been reported to observe proteins in the gel matrix, where the most used dyes are generally anionic. Anionic dyes allow for interactions with protonated amino acids, retaining the dye in the proteins. Fluorescent staining is an alternative technique considered to be sensitive, safe, and versatile. Some anionic complexes based on d6 transition metals have been used for this purpose, where cationic dyes have been less explored in this context. In this work, we synthesized and characterized a new monocationic rhenium complex fac-[Re(CO)3(deeb)B2]+ (where deeb is 4,4′-bis(ethoxycarbonyl)-2,2′-bpy and B2 is 2,4-di-tert-butyl-6-(3H-imidazo[4,5-c]pyridine-2-yl)phenol). We carried out a structural characterization of this complex by MS+, FTIR, 1H NMR, D2O exchange, and HHCOSY. Moreover, we carried out UV-Vis, luminescence, and cyclic voltammetry experiments to understand the effect of ligands on the complex’s electronic structure. We also performed relativistic theoretical calculations using the B3LYP/TZ2P level of theory and R-TDDFT within a dielectric continuum model (COSMO) to better understand electronic transitions and optical properties. We finally assessed the potential of fac-[Re(CO)3(deeb)B2]+ (as well as the precursor fac-Re(CO)3(deeb)Br and the free ligand B2) to stain proteins separated by SDS-PAGE. We found that only fac-[Re(CO)3(deeb)B2]+ proved viable to be directly used as a luminescent dye for proteins, presumably due to its interaction with negatively charged residues in proteins and by weak interactions provided by B2. In addition, fac-[Re(CO)3(deeb)B2]+ seems to interact preferentially with proteins and not with the gel matrix despite the presence of sodium dodecyl sulfate (SDS). In future applications, these alternative cationic complexes might be used alone or in combination with more traditional anionic compounds to generate counterion dye stains to improve the process.
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Affiliation(s)
- Alexander Carreño
- Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago, Chile
| | | | - Eduardo Solis-Céspedes
- Escuela de Bioingeniería Médica, Facultad de Medicina, Universidad Católica del Maule, Talca, Chile.,Laboratorio de Bioinformática y Química Computacional, Facultad de Medicina, Universidad Católica del Maule, Talca, Chile
| | - Dayán Páez-Hernández
- Center of Applied NanoSciences (CANS), Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago, Chile
| | - Wesley B Swords
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Gerald J Meyer
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Marcelo D Preite
- Departamento de Química Orgánica, Facultad de Química y Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Ivonne Chávez
- Departamento de Química Inorgánica, Facultad de Química y Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Andrés Vega
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Viña del Mar, Chile.,Centro para el Desarrollo de la Nanociencia y la Nanotecnología Cedenna, Santiago, Chile
| | - Juan A Fuentes
- Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago, Chile
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3
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Seguin AK, Wrighton-Araneda K, Cortés-Arriagada D, Cruz C, Venegas-Yazigi D, Paredes-García V. A new CuII-dinuclear paddlewheel complex. Structural and electronic properties. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Structural Characterization, DFT Calculation, NCI, Scan-Rate Analysis and Antifungal Activity against Botrytis cinerea of ( E)-2-{[(2-Aminopyridin-2-yl)imino]-methyl}-4,6-di- tert-butylphenol (Pyridine Schiff Base). MOLECULES (BASEL, SWITZERLAND) 2020; 25:molecules25122741. [PMID: 32545715 PMCID: PMC7357110 DOI: 10.3390/molecules25122741] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 05/30/2020] [Accepted: 06/01/2020] [Indexed: 12/12/2022]
Abstract
Botrytis cinerea is a ubiquitous necrotrophic filamentous fungal phytopathogen that lacks host specificity and can affect more than 1000 different plant species. In this work, we explored L1 [(E)-2-{[(2-aminopyridin-2-yl)imino]-methyl}-4,6-di-tert-butylphenol], a pyridine Schiff base harboring an intramolecular bond (IHB), regarding their antifungal activity against Botrytis cinerea. Moreover, we present a full characterization of the L1 by NMR and powder diffraction, as well as UV–vis, in the presence of previously untested different organic solvents. Complementary time-dependent density functional theory (TD-DFT) calculations were performed, and the noncovalent interaction (NCI) index was determined. Moreover, we obtained a scan-rate study on cyclic voltammetry of L1. Finally, we tested the antifungal activity of L1 against two strains of Botrytis cinerea (B05.10, a standard laboratory strain; and A1, a wild type strains isolated from Chilean blueberries). We found that L1 acts as an efficient antifungal agent against Botrytis cinerea at 26 °C, even better than the commercial antifungal agent fenhexamid. Although the antifungal activity was also observed at 4 °C, the effect was less pronounced. These results show the high versatility of this kind of pyridine Schiff bases in biological applications.
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Carreño A, Páez-Hernández D, Zúñiga C, Ramírez-Osorio A, Nevermann J, Rivera-Zaldívar MM, Otero C, Fuentes JA. Prototypical cis-ruthenium(II) complexes present differential fluorescent staining in walled-cell models (yeasts). CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00714-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Llancalahuen FM, Fuentes JA, Carreño A, Zúñiga C, Páez-Hernández D, Gacitúa M, Polanco R, Preite MD, Arratia-Pérez R, Otero C. New Properties of a Bioinspired Pyridine Benzimidazole Compound as a Novel Differential Staining Agent for Endoplasmic Reticulum and Golgi Apparatus in Fluorescence Live Cell Imaging. Front Chem 2018; 6:345. [PMID: 30211148 PMCID: PMC6123694 DOI: 10.3389/fchem.2018.00345] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 07/23/2018] [Indexed: 12/16/2022] Open
Abstract
In this study, we explored new properties of the bioinspired pyridine benzimidazole compound B2 (2,4-di-tert-butyl-6-(3H-imidazo[4,5-c]pyridine-2-yl)phenol) regarding its potential use as a differential biomarker. For that, we performed 1D 1HNMR (TOCSY), UV-Vis absorption spectra in different organic solvents, voltammetry profile (including a scan-rate study), and TD-DFT calculations that including NBO analyses, to provide valuable information about B2 structure and luminescence. In our study, we found that the B2 structure is highly stable, where the presence of an intramolecular hydrogen bond (IHB) seems to have a crucial role in the stability of luminescence, and its emission can be assigned as fluorescence. In fact, we found that the relatively large Stokes Shift observed for B2 (around 175 nm) may be attributed to the stability of the B2 geometry and the strength of its IHB. On the other hand, we determined that B2 is biocompatible by cytotoxicity experiments in HeLa cells, an epithelial cell line. Furthermore, in cellular assays we found that B2 could be internalized by passive diffusion in absence of artificial permeabilization at short incubation times (15 min to 30 min). Fluorescence microscopy studies confirmed that B2 accumulates in the endoplasmic reticulum (ER) and Golgi apparatus, two organelles involved in the secretory pathway. Finally, we determined that B2 exhibited no noticeable blinking or bleaching after 1 h of continuous exposure. Thus, B2 provides a biocompatible, rapid, simple, and efficient way to fluorescently label particular organelles, producing similar results to that obtained with other well-established but more complex methods.
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Affiliation(s)
- Felipe M Llancalahuen
- Escuela de Química y Farmacia, Facultad de Medicina, Universidad Andres Bello, Santiago, Chile
| | - Juan A Fuentes
- Laboratorio de Patogénesis y Genética Bacteriana, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Alexander Carreño
- Center of Applied Nanosciences, Universidad Andres Bello, Santiago, Chile.,Fondo Nacional de Ciencia y Tecnología (FONDECYT), Santiago, Chile
| | - César Zúñiga
- Center of Applied Nanosciences, Universidad Andres Bello, Santiago, Chile
| | | | | | - Rubén Polanco
- Centro de Biotecnología Vegeta, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Marcelo D Preite
- Departamento de Química Orgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Carolina Otero
- Escuela de Química y Farmacia, Facultad de Medicina, Universidad Andres Bello, Santiago, Chile
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7
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Rojas-Poblete M, Carreño A, Gacitúa M, Páez-Hernández D, Rabanal-León WA, Arratia-Pérez R. Electrochemical behaviors and relativistic DFT calculations to understand the terminal ligand influence on the [Re6(μ3-Q)8X6]4− clusters. NEW J CHEM 2018. [DOI: 10.1039/c7nj05114j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Born–Haber thermodynamic cycle was used to determine the redox potential in a series of rhenium(iii) clusters theoretical analysis at DFT level was considered to estimate the free energy of the reversible process ReIII6/ReIII5ReIV.
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Affiliation(s)
- Macarena Rojas-Poblete
- Center of Applied Nanosciences (CANS)
- Universidad Andrés Bello
- Santiago
- Chile
- Universidad Tecnológica de Chile INACAP
| | - Alexander Carreño
- Center of Applied Nanosciences (CANS)
- Universidad Andrés Bello
- Santiago
- Chile
- Núcleo Milenio de Ingeniería Molecular para Catálisis y Biosensores (MECB)
| | | | - Dayán Páez-Hernández
- Center of Applied Nanosciences (CANS)
- Universidad Andrés Bello
- Santiago
- Chile
- Núcleo Milenio de Ingeniería Molecular para Catálisis y Biosensores (MECB)
| | - Walter A. Rabanal-León
- Departamento de Ciencias Químicas
- Facultad Ciencias Exactas
- Universidad Andrés Bello
- Santiago
- Chile
| | - Ramiro Arratia-Pérez
- Center of Applied Nanosciences (CANS)
- Universidad Andrés Bello
- Santiago
- Chile
- Núcleo Milenio de Ingeniería Molecular para Catálisis y Biosensores (MECB)
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8
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Carreño A, Zúñiga C, Páez-Hernández D, Gacitúa M, Polanco R, Otero C, Arratia-Pérez R, Fuentes JA. Study of the structure–bioactivity relationship of three new pyridine Schiff bases: synthesis, spectral characterization, DFT calculations and biological assays. NEW J CHEM 2018. [DOI: 10.1039/c8nj00390d] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Schiff bases exhibit a broad range of applications, including their use as catalysts, stabilizers, dyes, and intermediates in organic synthesis; and biological activities, such as antifungal properties.
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Affiliation(s)
- Alexander Carreño
- Center of Applied Nanosciences (CANS)
- Universidad Andres Bello
- Santiago
- Chile
| | - César Zúñiga
- Center of Applied Nanosciences (CANS)
- Universidad Andres Bello
- Santiago
- Chile
| | | | | | - Rubén Polanco
- Centro de Biotecnología Vegetal (CBV)
- Facultad de Ciencias de la Vida
- Universidad Andres Bello
- Santiago
- Chile
| | - Carolina Otero
- Escuela de Química y Farmacia
- Facultad de Medicina
- Universidad Andres Bello
- Chile
| | | | - Juan A. Fuentes
- Laboratorio de Genética y Patogénesis Bacteriana
- Facultad de Ciencias de la Vida
- Universidad Andres Bello
- Santiago
- Chile
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9
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Berríos P, Fuentes JA, Salas D, Carreño A, Aldea P, Fernández F, Trombert AN. Inhibitory effect of biofilm-forming Lactobacillus kunkeei strains against virulent Pseudomonas aeruginosa in vitro and in honeycomb moth (Galleria mellonella) infection model. Benef Microbes 2017; 9:257-268. [PMID: 29124967 DOI: 10.3920/bm2017.0048] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Biofilms correspond to complex communities of microorganisms embedded in an extracellular polymeric matrix. Biofilm lifestyle predominates in Pseudomonas aeruginosa, an opportunistic Gram negative pathogen responsible for a wide spectrum of infections in humans, plants and animals. In this context, anti-biofilm can be considered a key strategy to control P. aeruginosa infections, thereby more research in the field is required. On the other hand, Lactobacillus species have been described as beneficial due to their anti-biofilm properties and their consequent effect against a wide spectrum of pathogens. In fact, biofilm-forming Lactobacilli seem to be more efficient than their planktonic counterpart to antagonise pathogenic bacteria. In this work, we demonstrated that Lactobacillus kunkeei, a novel Lactobacillus species isolated from honeybee guts, can form biofilms in vitro. In addition, the L. kunkeei biofilm can, in turn, inhibit the formation of P. aeruginosa biofilms. Finally, we found that L. kunkeei strains attenuate infection of P. aeruginosa in the Galleria mellonella model, presumably by affecting P. aeruginosa biofilm formation and/or their stability. Since L. kunkeei presents characteristics of a probiotic, this work provides evidence arguing that the use of this Lactobacillus species in both animals (including insects) and humans could contribute to impair P. aeruginosa biofilm formation.
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Affiliation(s)
- P Berríos
- 1 Escuela de Biotecnología, Facultad de Ciencias, Universidad Mayor, Camino La Pirámide 5750, Huechuraba, Santiago 8580745, Chile
| | - J A Fuentes
- 2 Laboratorio de Genética y Patogénesis Bacteriana, Facultad de Ciencias Biológicas, Universidad Andrés Bello, Av. República 217, Santiago 8370146, Chile
| | - D Salas
- 3 Centro de Genómica y Bioinformática, Facultad de Ciencias, Universidad Mayor, Camino La Pirámide 5750, Huechuraba, Santiago 8580745, Chile
| | - A Carreño
- 4 Center of Applied Nanosciences (CANS), Universidad Andres Bello, Ave. República 275, Santiago 8370146, Chile.,5 Núcleo Milenio de Ingeniería Molecular para Catálisis y Biosensores (MECB), ICM, Av. República 275, Santiago 8370146, Chile
| | - P Aldea
- 6 CEAPI Mayor, Universidad Mayor, Camino La Pirámide 5750, Huechuraba, Santiago 8580745, Chile
| | - F Fernández
- 3 Centro de Genómica y Bioinformática, Facultad de Ciencias, Universidad Mayor, Camino La Pirámide 5750, Huechuraba, Santiago 8580745, Chile
| | - A N Trombert
- 3 Centro de Genómica y Bioinformática, Facultad de Ciencias, Universidad Mayor, Camino La Pirámide 5750, Huechuraba, Santiago 8580745, Chile
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11
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Carreño A, Solis-Céspedes E, Páez-Hernández D, Arratia-Pérez R. Exploring the geometrical and optical properties of neutral rhenium (I) tricarbonyl complex of 1,10-phenanthroline-5,6-diol using relativistic methods. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.058] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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12
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X-ray diffraction and relativistic DFT studies on the molecular biomarker fac-Re(CO)3(4,4′-dimethyl-2,2′-bpy)(E-2-((3-amino-pyridin-4-ylimino)-methyl)-4,6-di-tert-butylphenol)(PF6). CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0196-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Carreño A, Schott E, Zarate X, Manriquez JM, Vega JC, Mardones M, Cowley AH, Chavez I, Hinestroza JP, Arratia-Perez R. DFT studies on coordination models for adsorption essays of Cu(II) and Ni(II) solutions in modified silica gel with iminodiacetic groups. CHEMICAL PAPERS 2016. [DOI: 10.1007/s11696-016-0022-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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14
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Carreño A, Gacitúa M, Fuentes JA, Páez-Hernández D, Peñaloza JP, Otero C, Preite M, Molins E, Swords WB, Meyer GJ, Manríquez JM, Polanco R, Chávez I, Arratia-Pérez R. Fluorescence probes for prokaryotic and eukaryotic cells using Re(CO)3+complexes with an electron withdrawing ancillary ligand. NEW J CHEM 2016. [DOI: 10.1039/c6nj00905k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Re(CO)3+complexes with an ancillary ligand present an electron withdrawing effect suitable for cell imaging.
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