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Goman D, Stanković A, Galović O, Džakula BN, Kontrec J, Medvidović-Kosanović M. Complexation of gallic acid with calcium: electrochemical, potentiometric, and UV-VIS studies. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:391-395. [PMID: 38126741 DOI: 10.1039/d3ay01586f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Gallic acid and its metal complexes are good antioxidants that could be used to increase the body's immune system against degenerative and viral diseases. Therefore, such complexes could be used as a good alternative to supplementary medicines and may have potential significance in clinical trials. Differential pulse voltammetry, UV/VIS spectroscopy, and potentiometry were used to analyse the complexation of gallic acid with calcium in this study. The metal : ligand ratio was determined using Job's continuous variation method and was found to be 2 : 1. The stability constant of calcium gallate was determined with potentiometric titration with a calcium electrode, which amounted to K° = 4.83 × 106 (log K° = 6.7). The combination of the results obtained in this study gives a deeper insight into the complexation of gallic acid with calcium and determines the stability constant of calcium gallate.
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Affiliation(s)
- Dominik Goman
- Department of Chemistry, J.J. Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Anamarija Stanković
- Department of Chemistry, J.J. Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | - Olivera Galović
- Department of Chemistry, J.J. Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia.
| | | | - Jasminka Kontrec
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
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Alshaikh NE, Zaki M, Sharfalddin AA, Al-Radadi NS, Hussien MA. Synthesis, Structural Characterization, DNA/HSA Binding, Molecular Docking and Anticancer Studies of Some D-Luciferin Complexes. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023] Open
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Alem MB, Desalegn T, Damena T, Bayle EA, Koobotse MO, Ngwira KJ, Ombito JO, Zachariah M, Demissie TB. Organic-inorganic hybrid salt and mixed ligand Cr(III) complexes containing the natural flavonoid chrysin: Synthesis, characterization, computational, and biological studies. Front Chem 2023; 11:1173604. [PMID: 37123873 PMCID: PMC10130586 DOI: 10.3389/fchem.2023.1173604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 03/24/2023] [Indexed: 05/02/2023] Open
Abstract
Organic-inorganic hybrid salt and mixed ligand Cr(III) complexes (Cr1 and Cr2) containing the natural flavonoid chrysin were synthesized. The metal complexes were characterized using UV-Vis, Fourier-transform infrared, MS, SEM-EDX, XRD, and molar conductance measurements. Based on experimental and DFT/TD-DFT calculations, octahedral geometries for the synthesized complexes were suggested. The powder XRD analysis confirms that the synthesized complexes were polycrystalline, with orthorhombic and monoclinic crystal systems having average crystallite sizes of 21.453 and 19.600 nm, percent crystallinities of 51% and 31.37%, and dislocation densities of 2.324 × 10-3 and 2.603 × 10-3 nm-2 for Cr1 and Cr2, respectively. The complexes were subjected to cytotoxicity, antibacterial, and antioxidant studies. The in vitro biological studies were supported with quantum chemical and molecular docking computational studies. Cr1 showed significant cytotoxicity to the MCF-7 cell line, with an IC50 value of 8.08 μM compared to 30.85 μM for Cr2 and 18.62 μM for cisplatin. Cr2 showed better antibacterial activity than Cr1. The higher E HOMO (-5.959 eV) and dipole moment (10.838 Debye) values of Cr2 obtained from the quantum chemical calculations support the observed in vitro antibacterial activities. The overall results indicated that Cr1 is a promising cytotoxic drug candidate.
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Affiliation(s)
- Mamaru Bitew Alem
- Department of Applied Chemistry, Adama Science and Technology University, Adama, Ethiopia
- *Correspondence: Mamaru Bitew Alem, , Tegene Desalegn, , Taye B. Demissie,
| | - Tegene Desalegn
- Department of Applied Chemistry, Adama Science and Technology University, Adama, Ethiopia
- *Correspondence: Mamaru Bitew Alem, , Tegene Desalegn, , Taye B. Demissie,
| | - Tadewos Damena
- Department of Chemistry, Wachemo University, Hossana, Ethiopia
| | - Enyew Alemayehu Bayle
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei, Taiwan
- Department of Chemistry, Debre Markos University, Debre Markos, Ethiopia
| | - Moses O. Koobotse
- School of Allied Health Professions, University of Botswana, Gaborone, Botswana
| | - Kennedy J. Ngwira
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, South Africa
| | | | | | - Taye B. Demissie
- Department of Chemistry, University of Botswana, Gaborone, Botswana
- *Correspondence: Mamaru Bitew Alem, , Tegene Desalegn, , Taye B. Demissie,
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Damena T, Alem MB, Zeleke D, Demissie TB, Desalegn T. Synthesis and Computational Studies of Novel Cobalt(II) and Oxovanadium(IV) Complexes of Quinoline Carbaldehyde Derivative Ligand for Antibacterial and Antioxidant Applications. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.134994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Damena T, Alem MB, Zeleke D, Desalegn T, Eswaramoorthy R, Demissie TB. Synthesis, characterization, and biological activities of zinc(II), copper(II) and nickel(II) complexes of an aminoquinoline derivative. Front Chem 2022; 10:1053532. [DOI: 10.3389/fchem.2022.1053532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
Interest is increasingly focused on the use of transition metal complexes as biochemical, medical, analytical, pharmaceutical, agronomic, anticancer, and antibacterial agents. In this study, three complexes of [Zn(H2L)Cl] (1), [Cu(H2L)(H2O)(NO3)] (2) and [Ni(H2L)(NO3)].2H2O (3) were synthesized from a 2-chloroquinoline-3-carbaldehyde derived ligand [H3L = ((E)-2-(((2-((2-hydroxyethyl)amino)quinolin-3-yl)methylene)amino)ethanol. The compounds were characterized using physicochemical and spectroscopic methods. The results demonstrate that the free ligand behaves as a tridentate ligand with one oxygen and two nitrogen (ONN) donor atoms in 1:1 metal:ligand ratio. The formation constants of the complexes were found to be (KZn(II) = 2.3 × 106, KCu(II) = 2.9 × 106, and KNi(II) = 3.8 × 105). The thermodynamic parameters indicated that the reactions were spontaneous with exothermic nature of metal-ligand interaction energies. Based on the analyses of the experimental (EDX, FTIR, PXRD, MS and TGA) and DFT results, a distorted tetrahedral, a distorted square pyramidal and square planar geometry for Zn(II), Cu(II) and Ni(II) complexes, respectively, were proposed. The B3LYP calculated IR frequencies and TD-B3LYP calculated absorption spectra were found to be in good agreement with the corresponding experimental results. The powder XRD data confirmed that the Zn(II), Cu(II) and Ni(II) complexes have polycrystalline nature with average crystallite sizes of 27.86, 33.54, 37.40 Å, respectively. In vitro antibacterial activity analyses of the complexes were studied with disk diffusion method, in which the complexes showed better activity than the precursor ligand. Particularly the Cu(II) complex showed higher percent activity index (62, 90%), than both Zn(II) (54, 82%) and Ni(II) (41, 68%) complexes against both E. coli and P. aeruginosa, respectively. Using the DPPH assay, the complexes were further assessed for their antioxidant capacities. All metal complexes showed improved antioxidant activity than the free ligand. Zn(II) and Cu(II) complexes, which had IC50 values of 10.46 and 8.62 μg/ml, respectively, showed the best antioxidant activity. The calculated results of Lipinski’s rule of five also showed that the target complexes have drug-like molecular nature and similarly, the results of binding mode of action of these compounds against E. coli DNA gyrase B and P. aeruginosa LasR.DNA were found to be in good agreement with the in vitro biological activities.
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Damena T, Alem MB, Zeleke D, Desalegn T, Eswaramoorthy R, Demissie TB. Novel Zinc(II) and Copper(II) Complexes of 2-((2-Hydroxyethyl)amino)quinoline-3-carbaldehyde for Antibacterial and Antioxidant Activities: A Combined Experimental, DFT, and Docking Studies. ACS OMEGA 2022; 7:26336-26352. [PMID: 35936450 PMCID: PMC9352163 DOI: 10.1021/acsomega.2c02205] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 07/07/2022] [Indexed: 05/06/2023]
Abstract
In the present work, two novel complexes of zinc(II) and copper(II) were synthesized from the ligand 2-((2-hydroxyethyl)amino)quinoline-3-carbaldehyde (H 2 L) in a 1:2 metal-to-ligand ratio in methanol. The complexes were characterized by UV-visible spectroscopy, fluorescence spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDX), mass spectrometry (MS), nuclear magnetic resonance (NMR) spectroscopy, and thermogravimetric analysis (TGA) experimental techniques and density functional theory (DFT) calculations. The spectral data revealed that the mono-deprotonated (HL) ligand acted as a bidentate ligand, which bound to both Zn(II) and Cu(II) ions via the nitrogen atom of the amine (N-H) and the hydroxyl (O-H) groups through the deprotonated oxygen atom. Formation constants and thermal analysis indicated that both metal complexes are stable up to 100 °C with thermodynamically favored chemical reactions. The Cu(II) complex showed antibacterial activities with the zones of inhibition of 20.90 ± 2.00 mm against Pseudomonas aeruginosa, 19.69 ± 0.71 mm against Staphylococcus aureus, and 18.58 ± 1.04 mm against Streptococcus pyogenes. These results are relatively higher compared with the Zn(II) complex at the same concentration. The minimum inhibitory concentration (MIC) results for the complexes also showed similar trends against the three bacteria. On the other hand, radical scavenging activities of both Cu(II) and Zn(II) complexes showed half-maximal inhibitory concentrations (IC50) of 4.72 and 8.2 μg/mL, respectively, while ascorbic acid (a positive control) has a value of 4.28 μg/mL. The Cu(II) complex exhibited better communication with the positive control, indicating its potential use for biological activities. The calculated and in silico molecular docking results also strongly support the experimental results.
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Affiliation(s)
- Tadewos Damena
- Department
of Applied Chemistry, Adama Science and
Technology University, P.O. Box 1888 Adama, Ethiopia
| | - Mamaru Bitew Alem
- Department
of Applied Chemistry, Adama Science and
Technology University, P.O. Box 1888 Adama, Ethiopia
| | - Digafie Zeleke
- Department
of Chemistry, Salale University, P.O. Box 245 Fitche, Ethiopia
| | - Tegene Desalegn
- Department
of Applied Chemistry, Adama Science and
Technology University, P.O. Box 1888 Adama, Ethiopia
| | - Rajalakshmanan Eswaramoorthy
- Department
of Biomaterials, Saveetha Dental College and Hospitals, Saveetha Institute
of Medical and Technical Sciences, Saveetha
University, Chennai 600077, India
| | - Taye B. Demissie
- Department
of Chemistry, University of Botswana, Notwane Rd, P/bag UB 00704, Gaborone, Botswana
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Theoretical Investigation by DFT and Molecular Docking of Synthesized Oxidovanadium(IV)-Based Imidazole Drug Complexes as Promising Anticancer Agents. Molecules 2022; 27:molecules27092796. [PMID: 35566147 PMCID: PMC9105665 DOI: 10.3390/molecules27092796] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/23/2022] [Accepted: 04/24/2022] [Indexed: 01/10/2023] Open
Abstract
Vanadium compounds have been set in various fields as anticancer, anti-diabetic, anti-parasitic, anti-viral, and anti-bacterial agents. This study reports the synthesis and structural characterization of oxidovanadium(IV)-based imidazole drug complexes by the elemental analyzer, molar conductance, magnetic moment, spectroscopic techniques, as well as thermal analysis. The obtained geometries were studied theoretically using density functional theory (DFT) under the B3LYP level. The DNA-binding nature of the ligands and their synthesized complexes has been studied by the electronic absorption titrations method. The biological studies were carried with in-vivo assays and the molecular docking method. The EPR spectra asserted the geometry around the vanadium center to be a square pyramid for metal complexes. The geometries have been confirmed using DFT under the B3LYP level. Moreover, the quantum parameters proposed promising bioactivity of the oxidovanadium(IV) complexes. The results of the DNA-binding revealed that the investigated complexes bind to DNA via non-covalent mode, and the intrinsic binding constant (Kb) value for the [VO(SO4)(MNZ)2] H2O complex was promising, which was 2.0 × 106 M−1. Additionally, the cytotoxic activity of the synthesized complexes exhibited good inhibition toward both hepatocellular carcinoma (HepG-2) and human breast cancer (HCF-7) cell lines. The results of molecular docking displayed good correlations with experimental cytotoxicity findings. Therefore, these findings suggest that our synthesized complexes can be introduced as effective anticancer agents.
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Damena T, Zeleke D, Desalegn T, Demissie TB, Eswaramoorthy R. Synthesis, Characterization, and Biological Activities of Novel Vanadium(IV) and Cobalt(II) Complexes. ACS OMEGA 2022; 7:4389-4404. [PMID: 35155932 PMCID: PMC8829937 DOI: 10.1021/acsomega.1c06205] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/18/2022] [Indexed: 05/08/2023]
Abstract
Herein, we report novel Co(II) and V(IV) complexes synthesized from an (E)-2-(((2-((2-hydroxyethyl)amino)quinolin-3-yl)methylene)amino)ethan-1-ol ligand (L), cobalt(II) chloride hexahydrate, and vanadyl(IV) sulfate in methanolic solutions. The ligand and the complexes were characterized by 1H NMR spectroscopy,13C NMR spectroscopy, UV-visible spectroscopy, fluorescence spectroscopy, FT-IR spectroscopy, powder X-ray diffraction (PXRD), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), mass spectroscopy (MS), thermal analysis, and molar conductance. The FT-IR spectral data showed that the ligand adopted a tridentate fashion when binding with the metal ions via the nitrogen atoms of the imine (C=N) and amine (N-H), and the oxygen atom of the hydroxyl group (O-H). The PXRD and SEM results indicated that the complexes are amorphous in nature. The density functional theory (DFT) calculated absorption and IR spectra agree very well with the corresponding experimental results. The antibacterial activities of the free ligand and its complexes were evaluated using a paper disk diffusion method. The complexes have better percent activitiy index than the free ligand. The cobalt complex exhibited a more recognizable antibacterial activity than the vanadium complex, specifically against Pseudomonas aeruginosa with a mean inhibition zone of 18.62 ± 0.19 mm, when compared with the positive control, ciprofloxacin, with a mean inhibition zone of 22.98 ± 0.08 mm at the same concentration. Furthermore, the antioxidant activities of the free ligand and its metal complexes were also determined in vitro using 2,2-diphenyl-1-picrylhydrazyl. The ligand exhibited less in vitro antioxidant activity than its transition metal complexes, in which the cobalt complex has a better antioxidant activity with half-inhibitory concentrations (IC50 of 16.01 μg/mL) than the ligand and the vanadium complex. Quantum molecular descriptors from the DFT calculations further support the experimental results. Molecular docking analysis also shed more light on the biological activities of the novel cobalt and vanadium complexes.
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Affiliation(s)
- Tadewos Damena
- Department
of Applied Chemistry, Adama Science and
Technology University, P.O.Box 1888, Adama 1888 Ethiopia
| | - Digafie Zeleke
- Department
of Applied Chemistry, Adama Science and
Technology University, P.O.Box 1888, Adama 1888 Ethiopia
- Department
of Chemistry, Jigjiga University, P.O.Box 1020, Jigjiga 1020, Ethiopia
| | - Tegene Desalegn
- Department
of Applied Chemistry, Adama Science and
Technology University, P.O.Box 1888, Adama 1888 Ethiopia
| | - Taye B. Demissie
- Department
of Chemistry, University of Botswana, Notwane Rd, P/bag UB 00704 Gaborone, Botswana
| | - Rajalakshmanan Eswaramoorthy
- Department
of Biomaterials, Saveetha Dental College and Hospitals, Saveetha Institute
of Medical and Technical Sciences, Saveetha
University, Chennai 602117, India
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Synthesis, spectrophotometric, spectroscopic, microbial studies and analytical applications of Cu(II) and Zn(II) complexes of chalcone ligand. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-021-01916-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Alamri MA, Al‐Jahdali M, Al‐Radadi NS, Hussien MA. Characterization, theoretical investigation, and biological applications of Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) complexes of a triazene ligand containing a benzothiazole ring. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Mona A. Alamri
- Department of Chemistry, Faculty of Science King Abdulaziz University Jeddah Saudi Arabia
- Department of Physics, College of Science and Arts in Dariyah Qassim University Dariyah Saudi Arabia
| | - Mutlaq. Al‐Jahdali
- Department of Chemistry, Faculty of Science King Abdulaziz University Jeddah Saudi Arabia
| | - Najlaa S. Al‐Radadi
- Chemistry Department, College of Science Taibah University Al‐Madinah Al‐Munawarah Saudi Arabia
| | - Mostafa A. Hussien
- Department of Chemistry, Faculty of Science King Abdulaziz University Jeddah Saudi Arabia
- Department of Chemistry, Faculty of Science Port Said University Port Said Egypt
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Sharfalddin AA, Hussien MA. Bivalence metal complexes of antithyroid drug carbimazole; synthesis, characterization, computational simulation, and biological studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129725] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Elgendy K, El-didamony A, Abd El-wahaab B. Analytical applications using spectrophotometric technique for the determination of uranium(VI), samarium(III) and cerium(III) by new organic reagent. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-01856-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abd El-wahaab B, Elgendy K, El-didamony A. Synthesis and characterization of new azo-dye reagent and using to spectrophotometric determination of samarium(III) in some industrial and blood samples. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-01000-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Naser NA, Alasedi KM, Khan ZA. New Derivatization Methodology of 4-aminobenzoic Acid from its Dietary Supplements: Kinetic Spectrophotometric Methods for Determination. CURRENT NUTRITION & FOOD SCIENCE 2019. [DOI: 10.2174/1573401315666190719164931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:A new approach describing the validation and development of an easy, new spectrophotometric and kinetic method for identification of para-aminobenzoic acid in dietary supplement has been performed. In this study, para-aminobenzoic acid was derived in a pH-controlled environment, as a new organic compound 4(4-Benzophenylazo)pyrogallol, by incorporating diazotized para-aminobenzoic acid with pyrogallol.Objective:The determination of para-aminobenzoic acid was conducted by the fixed time and initial rate techniques. These approaches were based on the reaction of the compound containing paraaminobenzoic acid, 4(4-Benzophenylazo)pyrogallol, with Ag(I) to form colored product with a maximum absorbance at 468nm. Both of these techniques were adopted for constructing the calibration curves and examined for their suitability for the quantitation of para-aminobenzoic acid in dietary supplement.Methods:The determination process was established, using initial rate and fixed time kinetic spectrophotometric methods.Results:4(4-Benzophenylazo)pyrogallol was characterized using proton-nuclear magnetic resonance, Fourier-transform infrared, differential scanning calorimetry and thermogravimetric thermal methods, gas chromatography–mass techniques, and solvatochromic behavior in solvents with different polarities was also examined.Conclusion:For the first time, para-aminobenzoic acid was well determined by incorporating it as an organic solid compound, 4(4-Benzophenylazo)pyrogallol, through coupling pyrogallol with diazotized para-aminobenzoic acid in regulated pH medium, ranging between 5.0 to 6.0. The existence of common excipients in the dietary supplement did not produce any significant interference. F- and ttest data analysis were used for statistical comparison of the suggested techniques with that of reference method, demonstrating excellent agreement with no significant difference in the associated precision and accuracy.
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Affiliation(s)
- Naser A. Naser
- Department of Chemistry, Faculty of Science, University of Kufa, P.O. Box (21), Najaf Governorate, Iraq
| | - Kasim M. Alasedi
- ALSheik Al-tousi University College, An-najaf al-ashraf, P.O. Box (9), Iraq
| | - Zainab A. Khan
- Department of Chemistry, Faculty of Education for Girls, University of Kufa, P.O. Box (21), Najaf Governorate, Iraq
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El-Maghrabey MH, Watanabe R, Kishikawa N, Kuroda N. Detection of hydrogen sulfide in water samples with 2-(4-hydroxyphenyl)-4,5-di(2-pyridyl)imidazole-copper(II) complex using environmentally green microplate fluorescence assay method. Anal Chim Acta 2019; 1057:123-131. [PMID: 30832911 DOI: 10.1016/j.aca.2019.01.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 01/09/2019] [Accepted: 01/10/2019] [Indexed: 01/06/2023]
Abstract
Hydrogen sulfide (H2S) is a colorless toxic gas which can be found as HS- in rivers and waste waters especially in the occupational susceptible environment. Herein we synthesized a lophine analogue, 2-(4-hydroxyphenyl)-4,5-di(2-pyridyl)imidazole (HPI), which fluoresces at 410 nm after excitation at 280 nm. HPI has an imidazole ring and a pyridine ring which are capable of forming coordinate bonds with copper (Cu(II)) that cause quenching of HPI fluorescence. We found that HS- can selectively liberate HPI from the complex via formation of CuS, thus, HPI regains its fluorescence properties. Interestingly, the probe was proved to be regenerable. This reaction was used for the development of a fluorescence microplate assay for the determination of HS- in environmental samples. The method was applied to river water samples and was able to detect HS- in concentrations down to 5 ppb with acceptable accuracy (90.3-103.0%) and good precision (%RSD ≤ 4.1). The method showed many advantages over the previously reported ones including instantaneous reaction, simple probe synthesis, high-throughput, high selectivity toward hydrogen sulfide over other ions and sulfur or thiol containing compounds and at last, it complies with the green chemistry rules through using a regenerable probe, aqueous solvents, and miniaturized measurement system.
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Affiliation(s)
- Mahmoud H El-Maghrabey
- Course of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan; Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Riho Watanabe
- Course of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Naoya Kishikawa
- Course of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Naotaka Kuroda
- Course of Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan.
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M'bitsi-Ibouily GC, Marimuthu T, Kumar P, Choonara YE, du Toit LC, Pradeep P, Modi G, Pillay V. Synthesis, Characterisation and In Vitro Permeation, Dissolution and Cytotoxic Evaluation of Ruthenium(II)-Liganded Sulpiride and Amino Alcohol. Sci Rep 2019; 9:4146. [PMID: 30858469 PMCID: PMC6412051 DOI: 10.1038/s41598-019-40538-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 02/07/2019] [Indexed: 12/15/2022] Open
Abstract
Sulpiride (SPR) is a selective antagonist of central dopamine receptors but has limited clinical use due to its poor pharmacokinetics. The aim of this study was to investigate how metal ligation to SPR may improve its solubility, intestinal permeability and prolong its half-life. The synthesis and characterisation of ternary metal complexes [Ru(p -cymene)(L)(SPR)]PF6 (L1 = (R)-(+)-2-amino-3-phenyl-1-propanol, L2 = ethanolamine, L3 = (S)-(+)-2-amino-1-propanol, L4 = 3-amino-1-propanol, L5 = (S)-(+)-2-pyrrolidinemethanol) are described in this work. The stability constant of the [Ru(p -cymene)(SPR)] complex was determined using Job's method. The obtained value revealed higher stability of the metal complex in the physiological pH than in an acidic environment such as the stomach. The ternary metal complexes were characterised by elemental analysis, Fourier transform infrared spectroscopy (FT-IR), 1H and 13C nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), thermal analyses, Ultraviolet-Visible (UV-Vis). Solubility studies showed higher aqueous solubility for complexed SPR than the free drug. Dissolution profiles of SPR from the metal complexes exhibited slower dissolution rate of the drug. Permeation studies through the pig's intestine revealed enhanced membrane permeation of the complexed drug. In vitro methyl thiazolyl tetrazolium (MTT) assay showed no noticeable toxic effects of the ternary metal complexes on Caco-2 cell line.
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Affiliation(s)
- Gretta C M'bitsi-Ibouily
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
| | - Thashree Marimuthu
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
| | - Pradeep Kumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
| | - Yahya E Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
| | - Lisa C du Toit
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
| | - Priyamvada Pradeep
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
| | - Girish Modi
- Department of Neurology, Division of Neurosciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
| | - Viness Pillay
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa.
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17
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Tekade PV, Bajaj SD, Tale BU, Authankar N, Sadmake S. Stability Constants of Complexes of Cr(II) and Sr(II) with Quinazoline and Dihydropyridine in Dioxane–Water Mixture on Spectrophotometric Data. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s0036024418110419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Islam MAAAA, Sheikh MC, Mumit MA, Miyatake R, Alam MA, Mondal MOA. Synthesis, characterization and antimicrobial activity of a bidentate NS Schiff base of S-benzyl dithiocarbazate and its divalent complexes. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1233329] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
| | - Md. Chanmiya Sheikh
- Faculty of Engineering, Department of Applied Chemistry, University of Toyama, Toyama, Japan
| | - Mohammad Abdul Mumit
- Department of Chemistry, Rajshahi University of Engineering & Technology, Rajshahi, Bangladesh
| | - Ryuta Miyatake
- Water Quality Management Center, University of Toyama, Toyama, Japan
| | - Md. Ashraful Alam
- Department of Chemistry, Rajshahi University of Engineering & Technology, Rajshahi, Bangladesh
| | - Md. Omar Ali Mondal
- Institute of Biological Sciences, University of Rajshahi, Rajshahi, Bangladesh
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19
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Singhal D, Singh AK, Upadhyay A. Highly selective potentiometric and colorimetric determinations of cobalt (II) ion using thiazole based ligands. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:216-24. [DOI: 10.1016/j.msec.2014.09.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 07/26/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
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