1
|
Savastano M, Fiaschi M, Ferraro G, Gratteri P, Mariani P, Bianchi A, Bazzicalupi C. Sensing Zn 2+ in Aqueous Solution with a Fluorescent Scorpiand Macrocyclic Ligand Decorated with an Anthracene Bearing Tail. Molecules 2020; 25:E1355. [PMID: 32192025 PMCID: PMC7146481 DOI: 10.3390/molecules25061355] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/13/2020] [Accepted: 03/15/2020] [Indexed: 01/16/2023] Open
Abstract
Synthesis of the new scorpiand ligand L composed of a [9]aneN3 macrocyclic ring bearing a CH2CH2NHCH2-anthracene tail is reported. L forms both cation (Zn2+) and anion (phosphate, benzoate) complexes. In addition, the zinc complexes of L bind these anions. The equilibrium constants for ligand protonation and complex formation were determined in 0.1 M NaCl aqueous solution at 298.1 ± 0.1 K by means of potentiometric (pH-metric) titrations. pH Controlled coordination/detachment of the ligand tail to Zn2+ switch on and off the fluorescence emission from the anthracene fluorophore. Accordingly, L is able to sense Zn2+ in the pH range 6-10 down to nM concentrations of the metal ion. L can efficiently sense Zn2+ even in the presence of large excess of coordinating anions, such as cyanide, sulphide, phosphate and benzoate, despite their ability to bind the metal ion.
Collapse
Affiliation(s)
- Matteo Savastano
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Matteo Fiaschi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Giovanni Ferraro
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Paola Gratteri
- Department of NEUROFARBA-Pharmaceutical and Nutraceutical section, and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy;
| | - Palma Mariani
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Antonio Bianchi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Carla Bazzicalupi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| |
Collapse
|
2
|
Martínez-Camarena Á, Savastano M, Llinares JM, Verdejo B, Bianchi A, García-España E, Bazzicalupi C. Stabilization of polyiodide networks with Cu(ii) complexes of small methylated polyazacyclophanes: shifting directional control from H-bonds to I⋯I interactions. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00912a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Modulation of hydrogen bonds and iodine–iodine interactions, both covalent and supramolecular, unlocks novel possibilities for the construction of transition metal-polyiodide hybrid networks.
Collapse
Affiliation(s)
| | - Matteo Savastano
- Department of Chemistry “Ugo Schiff”
- University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - José M. Llinares
- ICMol
- Department of Organic Chemistry
- University of Valencia
- Paterna
- Spain
| | - Begoña Verdejo
- ICMol
- Department of Inorganic Chemistry
- University of Valencia
- Paterna
- Spain
| | - Antonio Bianchi
- Department of Chemistry “Ugo Schiff”
- University of Florence
- 50019 Sesto Fiorentino
- Italy
| | | | - Carla Bazzicalupi
- Department of Chemistry “Ugo Schiff”
- University of Florence
- 50019 Sesto Fiorentino
- Italy
| |
Collapse
|
3
|
Karges J, Heinemann F, Maschietto F, Patra M, Blacque O, Ciofini I, Spingler B, Gasser G. A Ru(II) polypyridyl complex bearing aldehyde functions as a versatile synthetic precursor for long-wavelength absorbing photodynamic therapy photosensitizers. Bioorg Med Chem 2019; 27:2666-2675. [PMID: 31103403 DOI: 10.1016/j.bmc.2019.05.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 05/03/2019] [Accepted: 05/07/2019] [Indexed: 12/12/2022]
Abstract
The use of Photodynamic Therapy (PDT) for the treatment of several kinds of cancer as well as bacterial, fungal or viral infections has received increasing attention during the last decade. However, the currently clinically approved photosensitizers (PSs) have several drawbacks, including photobleaching, slow clearance from the organism and poor water solubility. To overcome these shortcomings, many efforts have been made in the development of new types of PSs, such as Ru(II) polypyridyl complexes. Nevertheless, most studied Ru(II) polypyridyl complexes have a low absorbance in the spectral therapeutic window. In this work, we show that, by carefully selecting substituents on the polypyridyl complex, it is possible to prepare a complex absorbing at a much higher wavelength. Specifically, we report on the synthesis as well as in-depth experimental and theoretical characterisation of a Ru(II) polypyridyl complex (complex 3) combining a shift in absorbance towards the spectral therapeutic window with a high 1O2 production. To overcome the absence or poor selectivity of most approved PSs into targeted cells/bacteria, they can be linked to targeting moieties. In this line, compound 3 was designed with reactive aldehyde groups, which can be used as a highly versatile synthetic precursor for further conjugation. As a proof of concept, 3 was reacted with benzylamine and the stability of the resulting conjugate 4 was investigated in DMSO, PBS and cell media. 4 showed an impressive ability to act as a PDT PS with no measurable dark cytotoxicity and photocytotoxicity in the low micromolar range against cancerous HeLa cells from 450 nm up to 540 nm.
Collapse
Affiliation(s)
- Johannes Karges
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, 75005 Paris, France
| | - Franz Heinemann
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, 75005 Paris, France; Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Federica Maschietto
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Theoretical Chemistry and Modelling, 75005 Paris, France
| | - Malay Patra
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Ilaria Ciofini
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Theoretical Chemistry and Modelling, 75005 Paris, France
| | - Bernhard Spingler
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
| | - Gilles Gasser
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, 75005 Paris, France.
| |
Collapse
|
4
|
Martínez-Camarena Á, Llinares JM, Domenech-Carbó A, Alarcón J, García-España E. A step forward in the development of superoxide dismutase mimetic nanozymes: the effect of the charge of the surface on antioxidant activity. RSC Adv 2019; 9:41549-41560. [PMID: 35541615 PMCID: PMC9076486 DOI: 10.1039/c9ra08992f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 12/07/2019] [Indexed: 12/03/2022] Open
Abstract
Two binucleating hezaaza macrocycles containing a pyridinol spacer have been prepared and characterised. Protonation studies indicate the deprotonation of the phenol group at relatively low pH values with the concomitant occurrence of a keto-enolic equilibrium. These ligands readily form binuclear Cu2+ and Zn2+ complexes as denoted by potentiometric and spectroscopic studies. The binding of the metals yields to the ready deprotonation of the phenol with the stabilisation of the keto form that results in complexes of greater stabilities than the analogous ones containing pyridine as spacer instead of pyridine. Mixed Cu2+–Zn2+-complexes were also detected in aqueous solutions containing equimolar amounts of Cu2+, Zn2+ and ligands. The binuclear Cu2+ complexes show significant SOD activity as proved by the McCord–Fridovich assays. The binuclear Cu2+ complexes of the ligands grafted to boehmite nanoparticles (BNPs) show a remarkable increase in SOD activity, which reaches 8-fold in one of the systems. The observed increase can be ascribed to the positive ζ-potential of the BNPs since the same complexes anchored to silica nanoparticles with negative ζ-potential do not show any apparent increase in activity. This behaviour is reminiscent of the positively charged funnel found in CuZnSOD, which has the electroactive copper ion at its end. Binuclear Cu2+ complexes of a pyridinophane polyamine ligand grafted to boehmite nanoparticles show a remarkable increase in SOD activity, which can be ascribed to the positive ζ-potential of the nanoparticles.![]()
Collapse
Affiliation(s)
| | - José M. Llinares
- ICMol
- Departamento de Química Inorgánica
- Universidad de Valencia
- Paterna
- Spain
| | | | - Javier Alarcón
- Departamento de Química Inorgánica
- Universidad de Valencia
- Burjassot
- Spain
| | | |
Collapse
|
5
|
Nebot-Guinot A, Liberato A, Máñez MA, Clares MP, Doménech A, Pitarch-Jarque J, Martínez-Camarena A, Basallote MG, García-España E. Methylation as an effective way to generate SOD-activity in copper complexes of scorpiand-like azamacrocyclic receptors. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.08.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
6
|
Martínez-Camarena Á, Delgado-Pinar E, Soriano C, Alarcón J, Llinares JM, Tejero R, García-España E. Enhancement of SOD activity in boehmite supported nanoreceptors. Chem Commun (Camb) 2018; 54:3871-3874. [DOI: 10.1039/c8cc01599f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Binuclear Cu2+ complexes of a pyridinophane polyamine ligand grafted to boehmite nanoparticles display a remarkable SOD activity enhancement.
Collapse
Affiliation(s)
- Álvaro Martínez-Camarena
- ICMol
- Departamento de Química Inorgánica
- Universidad de Valencia
- C/Catedrático José Beltrán 2
- Paterna
| | - Estefanía Delgado-Pinar
- ICMol
- Departamento de Química Inorgánica
- Universidad de Valencia
- C/Catedrático José Beltrán 2
- Paterna
| | - Concepción Soriano
- Departamento de Química Orgánica
- Univesidad de Valencia
- C/Dr Moliner s/n
- Valencia
- Spain
| | - Javier Alarcón
- Departamento de Química Inorgánica
- Universidad de Valencia
- C/Dr Moliner s/n
- Valencia
- Spain
| | - José M. Llinares
- ICMol
- Departamento de Química Inorgánica
- Universidad de Valencia
- C/Catedrático José Beltrán 2
- Paterna
| | - Roberto Tejero
- Departamento de Química Física, Universidad de Valencia, C/Dr Moliner s/n
- Valencia
- Spain
| | - Enrique García-España
- ICMol
- Departamento de Química Inorgánica
- Universidad de Valencia
- C/Catedrático José Beltrán 2
- Paterna
| |
Collapse
|
7
|
Haque A, Ilmi R, Al-Busaidi IJ, Khan MS. Coordination chemistry and application of mono- and oligopyridine-based macrocycles. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.07.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
8
|
Liberato A, Aguinaco A, Clares MP, Delgado-Pinar E, Pitarch-Jarque J, Blasco S, Basallote MG, García-España E, Verdejo B. Pb2+ complexes of small-cavity azamacrocyclic ligands: thermodynamic and kinetic studies. Dalton Trans 2017; 46:6645-6653. [DOI: 10.1039/c7dt00680b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and Pb2+ coordination of azamacrocyclic ligands have been described. This paper includes one of the few kinetic studies so far reported on the acid-promoted dissociation of Pb2+ macrocyclic complexes.
Collapse
Affiliation(s)
- A. Liberato
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
- Facultad de Ciencias
- Universidad de Cádiz
- Puerto Real
- Spain
| | - A. Aguinaco
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
- Facultad de Ciencias
- Universidad de Cádiz
- Puerto Real
- Spain
| | - M. P. Clares
- Instituto de Ciencia Molecular
- Departamento de Química Inorgánica
- Universidad de Valencia
- Edificio de Institutos de Paterna
- Paterna
| | - E. Delgado-Pinar
- Instituto de Ciencia Molecular
- Departamento de Química Inorgánica
- Universidad de Valencia
- Edificio de Institutos de Paterna
- Paterna
| | - J. Pitarch-Jarque
- Instituto de Ciencia Molecular
- Departamento de Química Inorgánica
- Universidad de Valencia
- Edificio de Institutos de Paterna
- Paterna
| | - S. Blasco
- Instituto de Ciencia Molecular
- Departamento de Química Inorgánica
- Universidad de Valencia
- Edificio de Institutos de Paterna
- Paterna
| | - M. G. Basallote
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
- Facultad de Ciencias
- Universidad de Cádiz
- Puerto Real
- Spain
| | - E. García-España
- Instituto de Ciencia Molecular
- Departamento de Química Inorgánica
- Universidad de Valencia
- Edificio de Institutos de Paterna
- Paterna
| | - B. Verdejo
- Instituto de Ciencia Molecular
- Departamento de Química Inorgánica
- Universidad de Valencia
- Edificio de Institutos de Paterna
- Paterna
| |
Collapse
|