1
|
Paderni D, Macedi E, Giacomazzo GE, Formica M, Giorgi L, Valtancoli B, Rossi P, Paoli P, Conti L, Fusi V, Giorgi C. A new biphenol-dipicolylamine based ligand and its dinuclear Zn 2+ complex as fluorescent sensors for ibuprofen and ketoprofen in aqueous solution. Dalton Trans 2024; 53:9495-9509. [PMID: 38767612 DOI: 10.1039/d4dt00935e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
In this work, the study of the new ligand 3,3'-bis[N,N-bis(pyridine-2-ylmethyl)aminomethyl]-2,2'-dihydroxybiphenyl (L) is reported, where a central 2,2'-biphenol (BPH) fluorophore was functionalized at 3,3'-positions with two dipicolylamine (DPA) side arms as receptor units. Following the synthesis and full chemical-physical characterization, the acid-base and Zn2+-coordination abilities of L were investigated through a combination of potentiometric, UV-Vis, fluorescence, NMR, XRD and DFT measurements. The optical properties of the ligand turned out to be strongly dependent on the pH, being straightforwardly associated with the protonation state of the BPH moiety, whereas its peculiar design allowed to form stable mono and dinuclear Zn2+ complexes. In the latter species, the presence of two Zn2+ ions coordinatively unsaturated and placed at close distance to each other, prompted us to test their usefulness as metallo-receptors for two environmental pollutants of great relevance, ibuprofen and ketoprofen. Potentiometric and fluorescence investigations evidenced that these important non-steroidal anti-inflammatory drugs (NSAIDs) are effectively coordinated by the metallo-receptors and, of relevance, both the stability and the fluorescence properties of the resulting ternary adducts are markedly affected by the different chemical architectures of the two substrates. This study aims at highlighting the promising perspectives arising from the use of polyamino phenolic ligands as chemosensors for H+/Zn2+ and other additional anionic targets in their metal-complexed forms.
Collapse
Affiliation(s)
- Daniele Paderni
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore, 2-4, 61029 Urbino, Italy.
| | - Eleonora Macedi
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore, 2-4, 61029 Urbino, Italy.
| | - Gina Elena Giacomazzo
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy.
| | - Mauro Formica
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore, 2-4, 61029 Urbino, Italy.
| | - Luca Giorgi
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore, 2-4, 61029 Urbino, Italy.
| | - Barbara Valtancoli
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy.
| | - Patrizia Rossi
- Department of Industrial Engineering, University of Florence, via S. Marta 3, 50139 Florence, Italy
| | - Paola Paoli
- Department of Industrial Engineering, University of Florence, via S. Marta 3, 50139 Florence, Italy
| | - Luca Conti
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy.
| | - Vieri Fusi
- Department of Pure and Applied Sciences, University of Urbino, via Ca' le Suore, 2-4, 61029 Urbino, Italy.
| | - Claudia Giorgi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, FI, Italy.
| |
Collapse
|
2
|
Serafim LF, Jayasinghe-Arachchige VM, Wang L, Rathee P, Yang J, Moorkkannur N S, Prabhakar R. Distinct chemical factors in hydrolytic reactions catalyzed by metalloenzymes and metal complexes. Chem Commun (Camb) 2023. [PMID: 37366367 DOI: 10.1039/d3cc01380d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
The selective hydrolysis of the extremely stable phosphoester, peptide and ester bonds of molecules by bio-inspired metal-based catalysts (metallohydrolases) is required in a wide range of biological, biotechnological and industrial applications. Despite the impressive advances made in the field, the ultimate goal of designing efficient enzyme mimics for these reactions is still elusive. Its realization will require a deeper understanding of the diverse chemical factors that influence the activities of both natural and synthetic catalysts. They include catalyst-substrate complexation, non-covalent interactions and the electronic nature of the metal ion, ligand environment and nucleophile. Based on our computational studies, their roles are discussed for several mono- and binuclear metallohydrolases and their synthetic analogues. Hydrolysis by natural metallohydrolases is found to be promoted by a ligand environment with low basicity, a metal bound water and a heterobinuclear metal center (in binuclear enzymes). Additionally, peptide and phosphoester hydrolysis is dominated by two competing effects, i.e. nucleophilicity and Lewis acid activation, respectively. In synthetic analogues, hydrolysis is facilitated by the inclusion of a second metal center, hydrophobic effects, a biological metal (Zn, Cu and Co) and a terminal hydroxyl nucleophile. Due to the absence of the protein environment, hydrolysis by these small molecules is exclusively influenced by nucleophile activation. The results gleaned from these studies will enhance the understanding of fundamental principles of multiple hydrolytic reactions. They will also advance the development of computational methods as a predictive tool to design more efficient catalysts for hydrolysis, Diels-Alder reaction, Michael addition, epoxide opening and aldol condensation.
Collapse
Affiliation(s)
- Leonardo F Serafim
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA.
| | | | - Lukun Wang
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA.
| | - Parth Rathee
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA.
| | - Jiawen Yang
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA.
| | | | - Rajeev Prabhakar
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA.
| |
Collapse
|
3
|
Tomczyk MD, Kuźnik N, Walczak K. Cyclen-based artificial nucleases: Three decades of development (1989–2022). Part a – Hydrolysis of phosphate esters. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|
4
|
Jayasinghe-Arachchige VM, Serafim LF, Hu Q, Ozen C, Moorkkannur SN, Schenk G, Prabhakar R. Elucidating the Roles of Distinct Chemical Factors in the Hydrolytic Activities of Hetero- and Homonuclear Synthetic Analogues of Binuclear Metalloenzymes. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
| | - Leonardo F. Serafim
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Qiaoyu Hu
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Cihan Ozen
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Sreerag N. Moorkkannur
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Brisbane, Queensland 4072, Australia
| | - Rajeev Prabhakar
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| |
Collapse
|
5
|
Maisonial-Besset A, Witkowski T, Quintana M, Besse S, Gaumet V, Cordonnier A, Alliot C, Vidal A, Denevault-Sabourin C, Tarrit S, Levesque S, Miot-Noirault E, Chezal JM. Synthesis and In Vitro Comparison of DOTA, NODAGA and 15-5 Macrocycles as Chelators for the 64Cu-Labelling of Immunoconjugates. Molecules 2022; 28:molecules28010075. [PMID: 36615280 PMCID: PMC9822305 DOI: 10.3390/molecules28010075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/12/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022] Open
Abstract
The development of 64Cu-based immuno-PET radiotracers requires the use of copper-specific bifunctional chelators (BFCs) that contain functional groups allowing both convenient bioconjugation and stable copper complexes to limit in vivo bioreduction, transmetallation and/or transchelation. The excellent in vivo kinetic inertness of the pentaazamacrocyclic [64Cu]Cu-15-5 complex prompted us to investigate its potential for the 64Cu-labelling of monoclonal antibodies (mAbs), compared with the well-known NODAGA and DOTA chelators. To this end, three NODAGA, DOTA and 15-5-derived BFCs, containing a pendant azadibenzocyclooctyne moiety, were synthesised and a robust methodology was determined to form covalent bonds between them and azide-functionalised trastuzumab, an anti-HER2 mAb, using strain-promoted azide-alkyne cycloaddition. Unlike the DOTA derivative, the NODAGA- and 15-5-mAb conjugates were radiolabelled with 64Cu, obtaining excellent radiochemical yields, under mild conditions. Although all the radioimmunoconjugates showed excellent stability in PBS or mouse serum, [64Cu]Cu-15-5- and [64Cu]Cu-NODAGA-trastuzumab presented higher resistance to transchelation when challenged by EDTA. Finally, the immunoreactive fraction of the radioimmunoconjugates (88-94%) was determined in HER-2 positive BT474 human breast cancer cells, confirming that the bioconjugation and radiolabelling processes implemented had no significant impact on antigen recognition.
Collapse
Affiliation(s)
- Aurélie Maisonial-Besset
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
| | - Tiffany Witkowski
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
| | - Mercedes Quintana
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
| | - Sophie Besse
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
| | - Vincent Gaumet
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
| | - Axel Cordonnier
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
| | | | | | - Caroline Denevault-Sabourin
- GICC EA7501, Team IMT, Université de Tours, UFR de Médecine, Bâtiment Vialle, 10 Boulevard Tonnellé, BP 3223, CEDEX 01, 37032 Tours, France
| | - Sébastien Tarrit
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
| | - Sophie Levesque
- Department of Nuclear Medicine, Jean Perrin Comprehensive Cancer Centre, F-63011 Clermont-Ferrand, France
| | - Elisabeth Miot-Noirault
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
| | - Jean-Michel Chezal
- Université Clermont Auvergne, Inserm, Imagerie Moléculaire et Stratégies Théranostiques, UMR 1240, F-63000 Clermont-Ferrand, France
- Correspondence:
| |
Collapse
|
6
|
Shu J, Yue J, Qiu X, Liu X, Ren W, Li Q, Li Y, Xu B, Zhang K, Jiang W. Binuclear metal complexes with a novel hexadentate imidazole derivative for the cleavage of phosphate diesters and biomolecules: distinguishable mechanisms. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00108f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxidative cleavage of phosphate diesters (HPNP, BNPP) is highly faster than the hydrolytic one by binuclear metal complexes with novel imidazole derivative, producing a non-lactone phosphate monoester due to the direct attack of free radicals.
Collapse
Affiliation(s)
- Jun Shu
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| | - Jian Yue
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| | - Xin Qiu
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| | - Xiaoqiang Liu
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| | - Wang Ren
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| | - Qianli Li
- College of Chemistry and Chemical Engineering
- Liaocheng University
- Shandong Liaocheng 252059
- P. R. China
| | - Yulong Li
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| | - Bin Xu
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| | - Kaiming Zhang
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| | - Weidong Jiang
- School of Chemistry and Environmental Engineering
- Sichuan University of Science & Engineering
- Sichuan Zigong 643000
- P. R. China
| |
Collapse
|
7
|
Batha S, Arman H, Larionov OV, Musie GT. Zinc(II) complexes of a versatile heptadentate ligand as phosphohydrolase structural and functional mimics. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
8
|
Erxleben A. Mechanistic Studies of Homo- and Heterodinuclear Zinc Phosphoesterase Mimics: What Has Been Learned? Front Chem 2019; 7:82. [PMID: 30847339 PMCID: PMC6393734 DOI: 10.3389/fchem.2019.00082] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 01/30/2019] [Indexed: 11/13/2022] Open
Abstract
Phosphoesterases hydrolyze the phosphorus oxygen bond of phosphomono-, di- or triesters and are involved in various important biological processes. Carboxylate and/or hydroxido-bridged dizinc(II) sites are a widespread structural motif in this enzyme class. Much effort has been invested to unravel the mechanistic features that provide the enormous rate accelerations observed for enzymatic phosphate ester hydrolysis and much has been learned by using simple low-molecular-weight model systems for the biological dizinc(II) sites. This review summarizes the knowledge and mechanistic understanding of phosphoesterases that has been gained from biomimetic dizinc(II) complexes, showing the power as well as the limitations of model studies.
Collapse
Affiliation(s)
- Andrea Erxleben
- School of Chemistry, National University of Ireland Galway, Galway, Ireland
| |
Collapse
|
9
|
Das B, Daver H, Pyrkosz-Bulska M, Gumienna-Kontecka E, Himo F, Nordlander E. An Unsymmetric Ligand with a N5
O2
Donor Set and Its Corresponding Dizinc Complex: A Structural and Functional Phosphoesterase Model. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701416] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Biswanath Das
- Chemical Physics; Department of Chemistry; Lund University; Box 124 22100 Lund Sweden
| | - Henrik Daver
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 106 91 Stockholm Sweden
| | - Monika Pyrkosz-Bulska
- Faculty of Chemistry; Arrhenius Laboratory; University of Wroclaw; F. Joliot-Curie Street 14 50-383 Wroclaw Poland
- Institute of Chemistry; Arrhenius Laboratory; University of Silesia; Szkolna 9 40-006 Katowice Poland
| | - Elzbieta Gumienna-Kontecka
- Faculty of Chemistry; Arrhenius Laboratory; University of Wroclaw; F. Joliot-Curie Street 14 50-383 Wroclaw Poland
| | - Fahmi Himo
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 106 91 Stockholm Sweden
| | - Ebbe Nordlander
- Chemical Physics; Department of Chemistry; Lund University; Box 124 22100 Lund Sweden
| |
Collapse
|
10
|
Mikkola S, Lönnberg T, Lönnberg H. Phosphodiester models for cleavage of nucleic acids. Beilstein J Org Chem 2018; 14:803-837. [PMID: 29719577 PMCID: PMC5905247 DOI: 10.3762/bjoc.14.68] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/12/2018] [Indexed: 12/12/2022] Open
Abstract
Nucleic acids that store and transfer biological information are polymeric diesters of phosphoric acid. Cleavage of the phosphodiester linkages by protein enzymes, nucleases, is one of the underlying biological processes. The remarkable catalytic efficiency of nucleases, together with the ability of ribonucleic acids to serve sometimes as nucleases, has made the cleavage of phosphodiesters a subject of intensive mechanistic studies. In addition to studies of nucleases by pH-rate dependency, X-ray crystallography, amino acid/nucleotide substitution and computational approaches, experimental and theoretical studies with small molecular model compounds still play a role. With small molecules, the importance of various elementary processes, such as proton transfer and metal ion binding, for stabilization of transition states may be elucidated and systematic variation of the basicity of the entering or departing nucleophile enables determination of the position of the transition state on the reaction coordinate. Such data is important on analyzing enzyme mechanisms based on synergistic participation of several catalytic entities. Many nucleases are metalloenzymes and small molecular models offer an excellent tool to construct models for their catalytic centers. The present review tends to be an up to date summary of what has been achieved by mechanistic studies with small molecular phosphodiesters.
Collapse
Affiliation(s)
- Satu Mikkola
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland
| | - Tuomas Lönnberg
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland
| | - Harri Lönnberg
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland
| |
Collapse
|
11
|
Coghlan CJ, Campi EM, Batten SR, Jackson WR, Hearn MT. Impact of the substitution pattern of xylyl-bridged 1,4-bis(1,4,7-triazacyclononane) ligands on the crystal structures of their zinc(II) complexes and their ability to bind to N-terminally tagged proteins. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.01.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
12
|
Massoud SS, Ledet CC, Junk T, Bosch S, Comba P, Herchel R, Hošek J, Trávníček Z, Fischer RC, Mautner FA. Dinuclear metal(ii)-acetato complexes based on bicompartmental 4-chlorophenolate: syntheses, structures, magnetic properties, DNA interactions and phosphodiester hydrolysis. Dalton Trans 2018; 45:12933-50. [PMID: 27479361 DOI: 10.1039/c6dt02596j] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A series of dinuclear metal(ii)-acetato complexes: [Ni2(μ-L(Cl)O)(μ2-OAc)2](PF6)·3H2O (1), [Ni2(μ-L(Cl)O)(μ2-OAc)2](ClO4)·CH3COCH3 (2), [Cu2(μ-L(Cl)O)(μ2-OAc)(ClO4)](ClO4) (3), [Cu2(μ-L(Cl)O)(OAc)2](PF6)·H2O (4), [Zn2(μ-L(Cl)O)(μ2-OAc)2](PF6) (5) and [Mn2(L(Cl)-O)(μ2-OAc)2](ClO4)·H2O (6), where L(Cl)O(-) = 2,6-bis[bis(2-pyridylmethyl)aminomethyl]-4-chlorophenolate, were synthesized. The complexes were structurally characterized by spectroscopic techniques and single crystal X-ray crystallography. Six-coordinate geometries with doubly bridged acetato ligands were found in Ni(ii), Zn(ii) and Mn(ii) complexes 1, 2, 5 and 6, whereas with Cu(ii) complexes a five-coordinate species was obtained with 4, and mixed five- and six-coordinate geometries with a doubly bridged dimetal core were observed in 3. The magnetic properties of complexes 1-4 and 6 were studied at variable temperatures and revealed weak to very weak antiferromagnetic interactions in 1, 2, 4 and 6 (J = -0.55 to -9.4 cm(-1)) and ferromagnetic coupling in 3 (J = 15.4 cm(-1)). These results are consistent with DFT calculations performed at the B3LYP/def2-TZVP(-f) level of theory. Under physiological conditions, the interaction of the dinculear complexes 1-5 with supercoiled plasmid ds-DNA did not show any pronounced nuclease activity, but Ni(ii) complexes 1 and 2 revealed a strong ability to unwind the supercoiled conformation of ds-DNA. The mechanistic studies performed on the interaction of the Ni(ii) complexes with DNA demonstrated the important impact of the nickel(ii) ion in the unwinding process. In combination with the DNA study, the phosphatase activity of complexes 1, 3, and 5 was examined by the phosphodiester hydrolysis of bis(2,4-dinitrophenol)phosphate (BDNPP) in the pH range of 5.5-10.5 at 25 °C. The Michaelis-Menten kinetics performed at pH 7 and 10.7 showed that catalytic efficiencies kcat/KM (kcat = catalytic rate constant, KM = substrate binding constant) decrease in the order: Ni(ii), 1 > Zn(ii), 5 > Cu(ii), 3. A similar trend was also observed with the turnover numbers at pH = 7. The results are discussed in relation to the coordination geometry and nature of the metal center as well as the steric environment imposed by the compartmental phenoxido ligand.
Collapse
Affiliation(s)
- Salah S Massoud
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Catherine C Ledet
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Thomas Junk
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Simone Bosch
- Anorganisch-Chemisches Institut and Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Peter Comba
- Anorganisch-Chemisches Institut and Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Radovan Herchel
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Jan Hošek
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Roland C Fischer
- Institut für Anorganische Chemische, Technische Universität Graz, Stremayrgasse 9/V, A-8010 Graz, Austria
| | - Franz A Mautner
- Institut für Physikalische and Theoretische Chemie, Technische Universität Graz, Stremayrgasse 9/II, A-8010, Graz, Austria.
| |
Collapse
|
13
|
Komiyama M. Design of Highly Active Ce(IV) Catalysts for DNA Hydrolysis and Their Applications. CHEM LETT 2016. [DOI: 10.1246/cl.160786] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
14
|
DNA binding, cleavage and cytotoxicity of a novel dimetallic Fe(III) triaza-cyclononane complex. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.02.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Copper(II) complexes of three isomeric bis(tacn) ligands: Syntheses, structures and properties. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
16
|
Auras BL, Oliveira VA, Terenzi H, Neves A, Iglesias BA. meso-Mono-[4-(1,4,7-triazacyclononanyl)]-tri(phenyl)]porphyrin and the respective zinc(ii)-complex: complete characterization and biomolecules binding abilities. Photochem Photobiol Sci 2016; 15:564-79. [DOI: 10.1039/c6pp00016a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We aimed to synthesize a new series of triazacyclononanyl-porphyrins (4and5) with the potential ability to bind DNA.
Collapse
Affiliation(s)
- Bruna L. Auras
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Vanessa A. Oliveira
- Centro de Biologia Molecular Estrutural
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Hernán Terenzi
- Centro de Biologia Molecular Estrutural
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Ademir Neves
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
| | - Bernardo A. Iglesias
- Departamento de Química
- Universidade Federal de Santa Catarina
- Florianópolis
- Brazil
- Departamento de Química
| |
Collapse
|
17
|
DNA damage and induction of apoptosis in pancreatic cancer cells by a new dinuclear bis(triazacyclonane) copper complex. J Inorg Biochem 2015; 145:101-7. [DOI: 10.1016/j.jinorgbio.2015.01.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 01/15/2015] [Accepted: 01/18/2015] [Indexed: 12/31/2022]
|
18
|
Massoud SS, Spell M, Ledet CC, Junk T, Herchel R, Fischer RC, Trávníček Z, Mautner FA. Magnetic and structural properties of dinuclear singly bridged-phenoxido metal(ii) complexes. Dalton Trans 2015; 44:2110-21. [DOI: 10.1039/c4dt03508a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Five new dinuclear bridged-phenoxido dichlorido-metal(ii) complexes [M2(μ-LClO)(X)2Cl2]PF6/ClO4 complexes, where M(ii) = Co, Ni, Cu (1–4) and Zn (5); X = CH3OH, H2O or 0 were synthesized and structurally characterized. Complexes 1–4 revealed weak to moderate antiferromagnetic coupling.
Collapse
Affiliation(s)
- Salah S. Massoud
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | - Mark Spell
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | | | - Thomas Junk
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | - Radovan Herchel
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
- Czech Republic
| | - Roland C. Fischer
- Institut für Anorganische Chemische
- Technische Universität Graz
- A-8010 Graz
- Austria
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
- Czech Republic
| | - Franz A. Mautner
- Institut für Physikalische and Theoretische Chemie
- Technische Universität Graz
- Graz
- Austria
| |
Collapse
|