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Hussain S, Hussain S, Zafar MN, Hussain I, Khan F, Mughal EU, Tahir MN. Preliminary anticancer evaluation of new Pd(II) complexes bearing NNO donor ligands. Saudi Pharm J 2024; 32:101915. [PMID: 38178853 PMCID: PMC10764271 DOI: 10.1016/j.jsps.2023.101915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/09/2023] [Indexed: 01/06/2024] Open
Abstract
In this study we presented a novel series of NNO tridentate ligands generating imino, amido and oxo donor pocket for Pd(II) coordination. All the compounds were meticulously characterized by elemental analysis and advanced spectroscopic techniques, including FTIR, proton and carbon NMR. The synthesized compounds underwent rigorous evaluation for their potential as anti-cancer agents, utilizing the aggressive breast cancer cell lines MDA-MB (ATCC) and MCF-7 as a crucial model for assessing growth inhibition in cancer cells. Remarkably, the MTT assay unveiled the robust anti-cancer activity for all palladium complexes against MDA-MB-231 and MCF-7 cells. Particularly, complex [Pd(L1)(CH3CN)] exhibited exceptional potency with an IC50 value of 25.50 ± 0.30 µM (MDA-MB-231) and 20.76 ± 0.30 µM (MCF-7), compared to respective 27.00 ± 0.80 µM and 24.10 ± 0.80 µM for cisplatin, underscoring its promising therapeutic potential. Furthermore, to elucidate the mechanistic basis for the anti-cancer effects, molecular docking studies on tyrosine kinases, an integral target in cancer research, were carried out. The outcome of these investigations further substantiated the remarkable anticancer properties inherent to these innovative compounds. This research offers a compelling perspective on the development of potent anti-cancer agents rooted in the synergy between ligands and Pd(II) complexes and presenting a promising avenue for future cancer therapy endeavors.
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Affiliation(s)
- Shazia Hussain
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Shabeeb Hussain
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - M. Naveed Zafar
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Irfan Hussain
- Center of Regenerative Medicine and Stem Cell Research, Aga Khan 74800, University Karachi, Pakistan
| | - Faizullah Khan
- Natural and Medical Sciences Research Center, University of Nizwa, Nizwa 616, Sultanate of Oman and Department of Pharmacy, Abdul Wali Khan University Mardan, Mardan 23200, Khyber Pakhtunkhwa, Pakistan
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Jiang X, Zhou Y, Chen H, Zhang R, Yu J, Wang S, Jiang F, Bai H, Yang X. A novel hydrangea-like magnetic composite Fe 3O 4@MnO 2@ZIF-67 for efficient selective adsorption of Pd(II) from metallurgical wastewater. Chemosphere 2023; 344:140432. [PMID: 37832882 DOI: 10.1016/j.chemosphere.2023.140432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Revised: 10/08/2023] [Accepted: 10/11/2023] [Indexed: 10/15/2023]
Abstract
The selective adsorption of palladium from wastewater is a feasible solution to solving palladium pollution and resource scarcity. Because traditional solvent extraction methods often involve the use of considerable amounts of organic solvents, research is focused on investigating adsorption techniques that can selectively remove palladium from wastewater. In this paper, the magnetic composite Fe3O4@MnO2@ZIF-67 was synthesized and its performance for the adsorption of Pd(II) in acidic water was investigated. Fe3O4@MnO2@ZIF-67 was characterized by various analytical methods such as TEM, SEM, EDS, BET, XRD, FTIR, zeta potential analysis, VSM, and TGA. The effects of palladium ion concentration, contact time, pH, and temperature on adsorption were evaluated. The kinetics were shown to follow the pseudo-second-order kinetic model and Elovich model, and the rate-limiting step was chemisorption. Thermodynamic studies showed that increasing the temperature promoted the adsorption of Pd(II), and the maximum uptake capacity of Fe3O4@MnO2@ZIF-67 for Pd(II) was 531.91 mg g-1. Interestingly, Fe3O4@MnO2@ZIF-67 exhibited superior selectivity for Pd(II) in the presence of Ir(IV), Pt(IV), and Rh(III). The adsorbent can be used repeatedly for selective adsorption of palladium. Even at the fifth cycle, the uptake rate of Pd(II) remained as high as 83.1%, and it showed a favorable adsorption capacity and selectivity for Pd(II) in real metallurgical wastewater. The adsorption mechanism was analyzed by SEM, FTIR, XRD, XPS, and DFT calculations, which indicated that electrostatic interactions and coordination with nitrogen-containing groups were involved. Fe3O4@MnO2@ZIF-67 is a promising adsorbent for the efficient adsorption and selective separation of palladium ions.
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Affiliation(s)
- Xue Jiang
- Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
| | - Yu Zhou
- Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
| | - Haiou Chen
- Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
| | - Ru Zhang
- Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
| | - Junhui Yu
- Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
| | - Shixiong Wang
- Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
| | - Fengzhi Jiang
- Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
| | - Huiping Bai
- School of Materials and Energy, Key Laboratory of Micro/Nano Materials and Technology, Yunnan University, Kunming, 650091, China.
| | - Xiangjun Yang
- Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China.
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Yang B, Ma Q, Hao J, Sun X. Peroxymonosulfate Activation by Palladium(II) for Pollutants Degradation: A Study on Reaction Mechanism and Molecular Structural Characteristics. Int J Environ Res Public Health 2022; 19:13036. [PMID: 36293612 PMCID: PMC9603282 DOI: 10.3390/ijerph192013036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/07/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
Compared with certain transition metals (e.g., iron, cobalt, and manganese), noble metals are less frequently applied in peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs). Palladium (Pd), as one of noble metals, has been reported to possess the possibility of both radical mechanisms and electron transfer mechanisms in a heterogeneous Pd/PMS system, however, data are still sparse on the homogeneous Pd/PMS system. Therefore, this work aims to explore the homogeneous reactivity of PMS by Pd(II) ions from the aspects of reaction parameters, radical or non-radical oxidation mechanisms, and the relationship between pollutants' degradation rate and their molecular descriptors based on both experimental data and density functional theory (DFT) calculation results. As a result, the reaction mechanism of Pd(II)/PMS followed a radical-driven oxidation process, where sulfate radicals (SO4•-), rather than hydroxyl radicals (HO•), were the primary reactive oxidant species. BOx and EHOMO played significant roles in pollutant degradation during the Pd(II)/PMS system. It turned out that the bond's stability and electron donation ability of the target compound was responsible for its degradation performance. This finding provides an insight into PMS activation by a noble metal, which has significant implications for scientific research and technical development.
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Affiliation(s)
- Bowen Yang
- Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Buliding Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China
- School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China
| | - Qiang Ma
- Sichuan Provincial Engineering Research Center of City Solid Waste Energy and Buliding Materials Conversion & Utilization Technology, Chengdu University, Chengdu 610106, China
- School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China
| | - Jiming Hao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Xiaojie Sun
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
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Tang J, Chen Y, Wang S, Kong D, Zhang L. Highly efficient metal-organic frameworks adsorbent for Pd(II) and Au(III) recovery from solutions: Experiment and mechanism. Environ Res 2022; 210:112870. [PMID: 35150714 DOI: 10.1016/j.envres.2022.112870] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/26/2022] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
With the boom of modern industry, the demand for precious metals palladium (Pd) and gold (Au) is increasing. However, the discharge of Pd(II) and Au(III) wastewater has caused environmental pollution and shortage of resources. Here, a new metal-organic frameworks adsorbent (MOF-AFH) was synthesized to efficiently separate Pd(II) and Au(III) from the water. The adsorption behavior of Pd(II) and Au(III) was explored at the same time. When gold and palladium are adsorbed separately, the adsorption capacity of gold and palladium is 389.02 mg/g and 191.27 mg/g, respectively. The equilibration time is 3 h. When gold and palladium coexist, the adsorption capacities of Au(III) and Pd(II) are 238.71 and 115.02 mg/g, respectively. The experimental results show that the adsorption of Pd(II) and Au(III) on MOF-AFH is a single-layer chemical adsorption, which is an endothermic process. MOF-AFH has excellent selectivity and after MOF-AFH is repeatedly used 4 times, the removal effect can still reach more than 90%. The adsorption mechanisms include reduction reaction and chelation with N and O-containing functional groups on the adsorbent. There is also electrostatic interaction for Au(III) adsorption. The adsorbent can be used to efficiently recover gold and palladium from wastewater.
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Affiliation(s)
- Jiali Tang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China
| | - Yingbi Chen
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China
| | - Shixing Wang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
| | | | - Libo Zhang
- Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China; State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, Yunnan, 650093, PR China.
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Monger LJ, Razinkov D, Bjornsson R, Suman SG. Synthesis, Characterization, and Reaction Studies of Pd(II) Tripeptide Complexes. Molecules 2021; 26:molecules26175169. [PMID: 34500604 PMCID: PMC8433849 DOI: 10.3390/molecules26175169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/19/2021] [Accepted: 08/23/2021] [Indexed: 11/16/2022] Open
Abstract
The aqueous synthesis of Pd(II) complexes with alkylated tripeptides led to the hydrolysis of the peptides at low pH values and mixtures of complexed peptides were formed. A non-aqueous synthetic route allowed the formation and isolation of single products and their characterization. Pd(II) complexes with α-Asp(OR)AlaGly(OR), β-Asp(OR)AlaGly(OR), and TrpAlaGly(OR) (R = H or alkyl) as tri and tetradentate chelates were characterized. The tridentate coordination mode was accompanied by a fourth monodentate ligand that was shown to participate in both ligand exchange reactions and a direct removal to form the tetradentate coordination mode. The tetradentate coordination revealed a rare a hemi labile carbonyl goup coordination mode to Pd(II). Reactivity with small molecules such as ethylene, acids, formate, and episulfide was investigated. Under acidic conditions and in the presence of ethylene; acetaldehyde was formed. The Pd(II) is a soft Lewis acid and thiophilic and the complexes abstract sulfur from episulfide at apparent modest catalytic rates. The complexes adopt a square planar geometry according to a spectroscopic analysis and DFT calculations that were employed to evaluate the most energetically favorable coordination geometry and compared with the observed infrared and NMR data.
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Affiliation(s)
- Lindsey J. Monger
- Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavik, Iceland; (L.J.M.); (D.R.)
| | - Dmitrii Razinkov
- Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavik, Iceland; (L.J.M.); (D.R.)
| | - Ragnar Bjornsson
- Max Planck Institute Chemical Energy Conversion, 45470 Mülheim an der Ruhr, Germany;
| | - Sigridur G. Suman
- Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavik, Iceland; (L.J.M.); (D.R.)
- Correspondence:
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Wu H, Kim SY. Adsorption Performances of an Acid-stable 2D Covalent Organic Framework towards Palladium(II) in Simulated High-level Liquid Waste. ANAL SCI 2021; 37:645-647. [PMID: 33840682 DOI: 10.2116/analsci.21c001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An acid-stable 2D covalent organic framework (COF TpPa-1) was synthesized by a reversible Schiff-base reaction and the following irreversible enol-keto tautomerism. The adsorption behaviors of COF TpPa-1 towards Pd(II) in simulated high-level liquid waste (HLLW) were investigated under the effect of contact time, the concentration of nitric acid etc. The obtained experimental results supported that the utilization of this type of acid-stable COF in HLLW to recover metal ion was feasible.
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Affiliation(s)
- Hao Wu
- Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University
| | - Seong-Yun Kim
- Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University
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Liu F, Hua S, Zhou L, Hu B. Development and characterization of chitosan functionalized dialdehyde viscose fiber for adsorption of Au(III) and Pd(II). Int J Biol Macromol 2021; 173:457-466. [PMID: 33493565 DOI: 10.1016/j.ijbiomac.2021.01.145] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 01/18/2021] [Accepted: 01/20/2021] [Indexed: 11/25/2022]
Abstract
A highly efficient fiber-based adsorbent (DAVFs-CS) was developed via decoration of chitosan (CS) on the dialdehyde viscose fibers (DAVFs) substrate, and employed to selective separation of precious metals from simulated contaminated water. The surface functionalization of the solid material was probed using the Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), Thermogravimetric analysis (TGA) and nuclear magnetic resonance (NMR) technique. The batch characteristic results showed that the maximum uptake capacities of DAVFs-CS were higher up to 322 mg/g and 207 mg/g for Au(III) and Pd(II) at optimal pH 2.0 and 3.0, which exhibited competitiveness with the majority of the reported adsorbents. Meanwhile, the adsorption data were in accordance with Langmuir and PSO equations, which indicated that the monolayer chemisorption dominated the adsorption process. The competitive adsorption study showed that the removal efficiency of Au(III) was not susceptible to the co-existing impurities. Adsorption mechanism study revealed that the negative Au(III) or Pd(II) species were firstly adsorbed on DAVFs-CS via the protonated amino groups, subsequently the partially reduction of them to zero-valent gold and palladium with the help of reductive functional groups. Thus, DAVFs-CS could be as a promising adsorbent to recovery of precious metals owning to its unique adsorption mechanism and excellent adsorption performance.
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Affiliation(s)
- Fenglei Liu
- School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, China
| | - Shan Hua
- School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, China
| | - Liang Zhou
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Baowei Hu
- School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, China.
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Monger LJ, Runarsdottir GR, Suman SG. Directed coordination study of [Pd(en)(H 2O) 2] 2+ with hetero-tripeptides containing C-terminus methyl esters employing NMR spectroscopy. J Biol Inorg Chem 2020; 25:811-825. [PMID: 32676770 DOI: 10.1007/s00775-020-01804-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 07/02/2020] [Indexed: 12/25/2022]
Abstract
Alkylation of the C-terminus acids in small peptides allows direction to amine and amide coordination, while changing the peptide composition to form tetradentate κ4[n,5,5], where n = 5-, 6-, 7-, or 8-membered ring coordination geometries, can be achieved. The alkylated tripeptide ligands, TrpAlaGly(OMe), β-Asp(OtBu)AlaGly(OMe), Asp(OtBu)AlaGly(OMe), and the fully methylated GSH, γ-Glu(OMe)Cys(SMe)Gly(OMe), were synthesized and their coordination properties to [Pd(en)(H2O)2]2+ were studied. pH-dependent coordination was analyzed by NMR spectroscopy and the coordination to the alkylated tripeptides at selected pH values inferred from their NMR spectra. If selective coordination of amine/amide donors results in metal complexation, allowing for flexible and adjustable ligand frameworks, then this strategy could potentially be extended to other metal ions and peptide system.
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Affiliation(s)
- Lindsey J Monger
- Science Institute, University of Iceland, Dunhagi 3, 107, Reykjavik, Iceland
| | | | - Sigridur G Suman
- Science Institute, University of Iceland, Dunhagi 3, 107, Reykjavik, Iceland.
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Marverti G, Gozzi G, Lauriola A, Ponterini G, Belluti S, Imbriano C, Costi MP, D’Arca D. The 1,10-Phenanthroline Ligand Enhances the Antiproliferative Activity of DNA-Intercalating Thiourea- Pd(II) and -Pt(II) Complexes Against Cisplatin-Sensitive and -Resistant Human Ovarian Cancer Cell Lines. Int J Mol Sci 2019; 20:E6122. [PMID: 31817267 PMCID: PMC6969938 DOI: 10.3390/ijms20246122] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 11/30/2019] [Accepted: 12/02/2019] [Indexed: 11/25/2022] Open
Abstract
Ovarian cancer is the most lethal gynecological malignancy, often because of the frequent insurgence of chemoresistance to the drugs currently used. Thus, new therapeutical agents are needed. We tested the toxicity of 16 new DNA-intercalating agents to cisplatin (cDDP)-sensitive human ovarian carcinoma cell lines and their resistant counterparts. The compounds were the complexes of Pt(II) or Pd(II) with bipyridyl (bipy) and phenanthrolyl (phen) and with four different thiourea ancillary ligands. Within each of the four series of complexes characterized by the same thiourea ligand, the Pd(phen) drugs invariably showed the highest anti-proliferative efficacy. This paralleled both a higher intracellular drug accumulation and a more efficient DNA intercalation than all the other metal-bidentate ligand combinations. The consequent inhibition of topoisomerase II activity led to the greatest inhibition of DNA metabolism, evidenced by the inhibition of the expression of the folate cycle enzymes and a marked perturbation of cell-cycle distribution in both cell lines. These findings indicate that the particular interaction of Pd(II) with phenanthroline confers the best pharmacokinetic and pharmacodynamic properties that make this class of DNA intercalators remarkable inhibitors, even of the resistant cell growth.
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Affiliation(s)
- Gaetano Marverti
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy; (G.G.); (A.L.)
| | - Gaia Gozzi
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy; (G.G.); (A.L.)
| | - Angela Lauriola
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy; (G.G.); (A.L.)
| | - Glauco Ponterini
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 213/d, 41125 Modena, Italy; (G.P.); (S.B.); (C.I.); (M.P.C.)
| | - Silvia Belluti
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 213/d, 41125 Modena, Italy; (G.P.); (S.B.); (C.I.); (M.P.C.)
| | - Carol Imbriano
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 213/d, 41125 Modena, Italy; (G.P.); (S.B.); (C.I.); (M.P.C.)
| | - Maria Paola Costi
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi 213/d, 41125 Modena, Italy; (G.P.); (S.B.); (C.I.); (M.P.C.)
| | - Domenico D’Arca
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41125 Modena, Italy; (G.G.); (A.L.)
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Zhang H, Hu X. Biosynthesis of Pd and Au as nanoparticles by a marine bacterium Bacillus sp. GP and their enhanced catalytic performance using metal oxides for 4-nitrophenol reduction. Enzyme Microb Technol 2018; 113:59-66. [PMID: 29602388 DOI: 10.1016/j.enzmictec.2018.03.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 03/01/2018] [Accepted: 03/09/2018] [Indexed: 11/17/2022]
Abstract
Recovery of noble metals using marine bacteria is becoming an attractive research area because the marine microbes can better adapt to unfavorable environment than terrestrial microorganisms. In this study, we first reported that a marine Bacillus sp. GP was capable of producing Pd and Au NPs in the presence of sodium lactate. Ultraviolet visible spectrometer (UV-vis), transmission electron microscopy (TEM), X-ray diffraction patterns (XRD), X-ray photoelectron spectroscopy (XPS) and fourier transform infrared spectroscopy (FTIR) analyses were employed to explain the process and mechanism of Pd(II)/Au(III) reduction through GP. Additionally, we also found that bio-Pd/Au NPs could be used as catalysts in chemical reduction of 4-nitrophenol (4-NP). Moreover, the catalytic activity of bio-Pd NPs could be enhanced by Fe3O4, Al2O3 and SiO2, which is beneficial for practical application. The k1 (k2) values of Fe3O4, Al2O3 and SiO2 supplemental systems were approximately 1.28-1.69 (1.15-1.69), 1.42-1.75 (1.53-1.91) and 1.07-1.73 (1.14-1.49) fold, respectively, compared to that of control systems.
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Affiliation(s)
- Haikun Zhang
- Yantai Institute of Costal Zone Research, Chinese Academy of Sciences, Yantai 264000, China
| | - Xiaoke Hu
- Yantai Institute of Costal Zone Research, Chinese Academy of Sciences, Yantai 264000, China.
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11
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Seyfi S, Alizadeh R, Darvish Ganji M, Amani V. Synthesis, spectral and luminescence study, crystal structure determination and DFT calculation of binuclear palladium(II) complexes. Spectrochim Acta A Mol Biomol Spectrosc 2018; 190:298-311. [PMID: 28941414 DOI: 10.1016/j.saa.2017.09.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 08/18/2017] [Accepted: 09/12/2017] [Indexed: 06/07/2023]
Abstract
Binuclear palladium(II) complexes with metal-metal (d8-d8) bonding interaction were synthesized by reactions of the 1-methyl-1H-1,2,3,4-tetrazole-5-thiol (Hmtzt) or a mixture of Hmtzt and 1,3-propanediamine (1,3-pda) ligands. Complex [Pd2(μ-mtzt)4]·2CH3CN (1) was synthesized by the reaction of Pd(OAc)2 with Hmtzt dissolved in acetonitrile and complex [Pd2(μ-mtzt)2(mtzt)2(1,3-pda)] (2) was synthesized by reaction of a mixture of Hmtzt and 1,3-propanediamine (dissolved in methanol) with PdCl2 (dissolved in acetonitrile) and were identified through elemental analysis, IR, UV-Vis, 1H NMR, luminescence spectroscopy as well as single-crystal X-ray diffraction method. A single-crystal of complex 1 shows that two Pd(II) centers are linked together by four bridging tetrazole ligands providing a paddle wheel-like arrangement. Also a crystal structure of complex 2 shows that this complex possesses a symmetric structure in which one Pd atom is tetra-coordinated by four sulfur atoms to forms PdS4 and other Pd atom is tetra-coordinated by four nitrogen to forms PdN4 coordination sphere. Density functional theory (DFT) was performed in this study for the Hmtzt ligand and binuclear palladium(II) complexes (1) and (2). The DFT calculation shows PdII-PdII bond lengths of 2.831 and 3.086Å in complex 1 and 2, respectively which are close to the observed bond lengths of 2.802(11) and 3.0911(17)Å from single-crystal X-ray structure. The optimized geometry of the complexes is shown good agreement by X-ray data. Structural properties and molecular descriptors including bond lengths, bond angles, chemical hardness, dipole moment, HOMO-LUMO energy levels, electron transfer were analyzed. The IR spectroscopy was performed using VEDA4 software and UV-Vis spectra were analyzed using time-dependent density functional theory (TD-DFT) method. The theoretical and experimental data were also compared with each other.
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Affiliation(s)
- S Seyfi
- School of Chemistry, Damghan University, P.O. Box 36715-364, Damghan, Iran
| | - R Alizadeh
- School of Chemistry, Damghan University, P.O. Box 36715-364, Damghan, Iran.
| | - M Darvish Ganji
- Department of Nanochemistry, Faculty of Pharmaceutical Chemistry, Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran.
| | - V Amani
- Department of Chemistry, Farhangian University, Tehran, Iran
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Wu H, Zhao Y, Tan X, Zeng X, Guo Y, Yang J. A convenient method for determination of quizalofop-p-ethyl based on the fluorescence quenching of eosin Y in the presence of Pd(II). Spectrochim Acta A Mol Biomol Spectrosc 2017; 174:301-306. [PMID: 27987479 DOI: 10.1016/j.saa.2016.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/21/2016] [Accepted: 12/06/2016] [Indexed: 06/06/2023]
Abstract
A convenient fluorescence quenching method for determination of Quizalofop-p-ethyl(Qpe) was proposed in this paper. Eosin Y(EY) is a red dye with strong green fluorescence (λex/λem=519/540nm). The interaction between EY, Pd(II) and Qpe was investigated by fluorescence spectroscopy, resonance Rayleigh scattering(RRS) and UV-Vis absorption. Based on changes in spectrum, Pd(II) associated with Qpe giving a positively charged chelate firstly, then reacted with EY through electrostatic and hydrophobic interaction formed ternary chelate could be demonstrated. Under optimum conditions, the fluorescence intensity of EY could be quenched by Qpe in the presence of Pd(II) and the RRS intensity had a remarkable enhancement, which was directly proportional to the Qpe concentration within a certain concentration range, respectively. Based on the fluorescence quenching of EY-Pd(II) system by Qpe, a novel, convenient and specific method for Qpe determination was developed. To our knowledge, this is the first fluorescence method for determination of Qpe was reported. The detection limit for Qpe was 20.3ng/mL and the quantitative determination range was 0.04-1.0μg/mL. The method was highly sensitive and had larger detection range compared to other methods. The influence of coexisting substances was investigated with good anti-interference ability. The new analytical method has been applied to determine of Qpe in real samples with satisfactory results.
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Affiliation(s)
- Huan Wu
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing, 404100, P.R. China
| | - Yanmei Zhao
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing, 404100, P.R. China
| | - Xuanping Tan
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing, 404100, P.R. China
| | - Xiaoqing Zeng
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing, 404100, P.R. China
| | - Yuan Guo
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing, 404100, P.R. China
| | - Jidong Yang
- Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Wanzhou, Chongqing, 404100, P.R. China; School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, P.R. China.
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Qiao M, Jiang J, Yang J, Liu S, Liu Z, Hu X. A sensitive "turn-on" fluorescent assay for quantification of ceftriaxone based on L-tryptophan- Pd(II) complex fluorophore. Spectrochim Acta A Mol Biomol Spectrosc 2016; 161:95-100. [PMID: 26963730 DOI: 10.1016/j.saa.2016.02.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 02/20/2016] [Accepted: 02/23/2016] [Indexed: 06/05/2023]
Abstract
Based on L-tryptophan-Pd(II) system, a sensitive and selective fluorimetric assay for the quantification of ceftriaxone (CTRX) had been developed. The experimental results showed that in pH 4.0 Britton-Robinson (BR) buffer medium, the fluorescence of L-tryptophan (L-Trp) (λex/λem=276 nm/352 nm) could be efficiently quenched by Pd(II). When CTRX was added to the mixed solution of the L-tryptophan and Pd(II), the fluorescence of L-Trp recovered. The reaction mechanism and the reasons for the fluorescence recovery were also discussed. Pd(II) reacted with L-Trp to form a 1:1 chelate complex, and then, after CTRX was added in L-Try-Pd(II) system, the ligand exchange reaction occurred between L-Trp and CTRX, which resulted in the fluorescence recovery. Under the optimized experimental conditions, the recovered fluorescence intensities at 352 nm showed excellent linear relationship with the concentration of CTRX over the range of 6.0 × 10(-8)-2.4 × 10(-)(6) mol L(-1) (0.040-1.59 μg mL(-1)). The correlation coefficient (R) was 0.9997 and the detection limit was 1.8 × 10(-8) mol L(-1) (11.9 ng mL(-1)). Furthermore, the assay had been applied to determine trace amount of CTRX human urine samples with satisfactory results.
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Affiliation(s)
- Man Qiao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Junze Jiang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Jidong Yang
- College of Chemical and Environmental Engineering, Chongqing Three Gorges University, Wanzhou, Chongqing 404100, China
| | - Shaopu Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhongfang Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiaoli Hu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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Hosny NM, Sherif YE. Synthesis, structural, optical and anti-rheumatic activity of metal complexes derived from (E)-2-amino-N-(1-(2-aminophenyl)ethylidene)benzohydrazide (2-AAB) with Ru(III), Pd(II) and Zr(IV). Spectrochim Acta A Mol Biomol Spectrosc 2015; 136 Pt B:510-519. [PMID: 25448952 DOI: 10.1016/j.saa.2014.09.064] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 09/11/2014] [Accepted: 09/18/2014] [Indexed: 06/04/2023]
Abstract
Three new metal complexes derived from Pd(II), Ru(III) and Zr(IV) with (E)-2-amino-N-(1-(2-aminophenyl)ethylidene)benzohydrazide (2-AAB) have been synthesized. The isolated complexes were characterized by elemental analyses, FT-IR, UV-Vis, ES-MS, (1)H NMR, XRD, thermal analyses (TGA and DTA) and conductance. The morphology and the particle size were determined by transmittance electron microscope (TEM). The results showed that, the ligand coordinates to Pd(II) in the enol form, while it coordinates to Ru(III) and Zr(IV) in the keto form. A square planar geometry is suggested for Pd(II) complex and octahedral geometries are suggested for Ru(III) and Zr(IV) complexes. The optical band gaps of the isolated complexes were measured and indicated the semi-conductivity nature of the complexes. The anti-inflammatory and analgesic activities of the ligand and its complexes showed that, Ru(III) complex has higher effect than the well known drug "meloxicam".
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Affiliation(s)
- Nasser Mohammed Hosny
- Chemistry Department, Faculty of Science, Port-Said University, 23 December Street, Port-Said, Egypt.
| | - Yousery E Sherif
- Department of Chemistry, Faculty of Science and Arts, Ulla, Taibah University, Saudi Arabia; Clinical Pharmacology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
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Alyar S, Adem Ş. Synthesis, characterization, antimicrobial activity and carbonic anhydrase enzyme inhibitor effects of salicilaldehyde-N-methyl p-toluenesulfonylhydrazone and its Palladium(II), Cobalt(II) complexes. Spectrochim Acta A Mol Biomol Spectrosc 2014; 131:294-302. [PMID: 24835932 DOI: 10.1016/j.saa.2014.04.121] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 04/12/2014] [Accepted: 04/22/2014] [Indexed: 06/03/2023]
Abstract
We report the synthesis of the ligand, salicilaldehyde-N-methyl p-toluenesulfonylhydrazone (salptsmh) derived from p-toluenesulfonicacid-1-methylhydrazide (ptsmh) and its Pd(II) and Co(II) metal complexes were synthesized for the first time. The structure of the ligand and their complexes were investigated using elemental analysis, magnetic susceptibility, molar conductance and spectral (IR, NMR and LC-MS) measurements. Salptsmh has also been characterized by single crystal X-ray diffraction. (1)H and (13)C shielding tensors for crystal structure were calculated with GIAO/DFT/B3LYP/6-311++G(d,p) methods in CDCl3. The complexes were found to have general composition [ML2]. The results of elemental analysis showed 1:2 (metal/ligand) stoichiometry for all the complex. Magnetic and spectral data indicate a square planar geometry for Pd(II) complex and a distorted tetrahedral geometry for Co(II) complexes. The ligand and its metal chelates have been screened for their antimicrobial activities using the disk diffusion method against the selected Gram positive bacteria: Bacillus subtilis, Bacillus cereus, Staphylococcus aureus, Enterococcus faecalis, Gram negative bacteria: Eschericha coli, Pseudomonas aeruginosa, Klebsiella pneumonia. The inhibition activities of these compounds on carbonic anhydrase II (CA II) and carbonic anhydrase I (CA I) have been investigated by comparing IC50 and Ki values and it has been found that Pd(II) complex have more enzyme inhibition efficiency than salptsmh and Co(II) complex.
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Affiliation(s)
- Saliha Alyar
- Department of Chemistry, Science Faculty, Karatekin University, 18100 Çankırı, Turkey.
| | - Şevki Adem
- Department of Chemistry, Science Faculty, Karatekin University, 18100 Çankırı, Turkey
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Qiao M, Wang Y, Liu S, Liu Z, Yang J, Zhu J, Hu X. A rapid and sensitive resonance Rayleigh scattering spectra method for the determination of quinolones in human urine and pharmaceutical preparation. LUMINESCENCE 2014; 30:207-15. [PMID: 24976410 DOI: 10.1002/bio.2714] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/05/2014] [Accepted: 05/07/2014] [Indexed: 11/05/2022]
Abstract
A new method based on resonance Rayleigh scattering (RRS) was proposed for the determination of quinolones (QNS) at the nanogram level. In pH 3.3-4.4 Britton-Robinson buffer medium, quinolones such as ciprofloxacin, pipemidic acid (PIP), lomefloxacin (LOM), norfloxacin (NOR) and sarafloxacin (SAR) were protonated and reacted with methyl orange (MO) to form an ion-pair complex, which then further formed a six-membered ring chelate with Pd(II). As a result, new RRS spectra appeared and the RRS intensities were enhanced greatly. RRS spectral characteristics of the MO-QNS-Pd(II) systems, the optimum conditions for the reaction, and the influencing factors were investigated. Under optimum conditions, the scattering intensity (∆I) increments were directly proportional to the concentration of QNS with in certain ranges. The method had high sensitivity, and the detection limits (3σ) ranged from 6.8 to 12.6 ng/mL. The proposed method had been successfully applied for the determination of QNS in pharmaceutical formulations and human urine samples. In addition, the mechanism of the reaction system was discussed based on IR, absorption and fluorescence spectral studies. The reasons for the enhancement of scattering spectra were discussed in terms of fluorescence-scattering resonance energy transfer, hydrophobicity and molecular size.
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Affiliation(s)
- Man Qiao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
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