1
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Somnin C, Leclercq L, Chamieh J, Menedeu ML, Medina C, Rousseaux O, Tripier R, Iglesias CP, Cottet H. Taylor dispersion analysis for measurement of diffusivity and size of gadolinium-based contrast agents. Eur J Pharm Sci 2024; 200:106831. [PMID: 38871338 DOI: 10.1016/j.ejps.2024.106831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/27/2024] [Accepted: 06/10/2024] [Indexed: 06/15/2024]
Abstract
Gadolinium-based contrast agents (GBCA) are complexes of a Gadolinium metal center and a linear or macrocyclic polyamino-carboxylic acid chelating agent. These agents are employed to enhance the visibility of deep abnormalities through MRI techniques. Knowing the precise dimensions of various GBCA is key parameter for understanding their in-vivo and pharmaco-kinetic behaviors, their diffusivity, as well as their relaxivity. However, conventional size characterization techniques fall short when dealing with these tiny molecules (≤1 nm). In this work, we propose to determine the size and diffusivity of gadolinium-based contrast agents using Taylor dispersion analysis (TDA). TDA provided a reliable measurement of the hydrodynamic diameter and the diffusion coefficient. The obtained results were compared to DOSY NMR (Diffusion-ordered Nuclear Magnetic Resonance Spectroscopy) and DFT (Density Functional Theory).
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Affiliation(s)
| | - Laurent Leclercq
- IBMM, CNRS, ENSCM, University of Montpellier, Montpellier, France
| | - Joseph Chamieh
- IBMM, CNRS, ENSCM, University of Montpellier, Montpellier, France.
| | - Mael Le Menedeu
- GUERBET Research&Innovation, CDG, BP57400, Roissy 95943 Cedex, France; Univ Brest, UMR-CNRS 6521 CEMCA, Brest 29238, France
| | - Christelle Medina
- GUERBET Research&Innovation, CDG, BP57400, Roissy 95943 Cedex, France
| | - Olivier Rousseaux
- GUERBET Research&Innovation, CDG, BP57400, Roissy 95943 Cedex, France
| | | | | | - Hervé Cottet
- IBMM, CNRS, ENSCM, University of Montpellier, Montpellier, France.
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2
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Nucera A, Platas-Iglesias C, Carniato F, Botta M. Effect of hydration equilibria on the relaxometric properties of Gd(III) complexes: new insights into old systems. Dalton Trans 2023; 52:17229-17241. [PMID: 37955945 DOI: 10.1039/d3dt03413e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
We present a detailed relaxometric and computational investigation of three Gd(III) complexes that exist in solution as an equilibrium of two species with a different number of coordinated water molecules: [Gd(H2O)q]3+ (q = 8, 9), [Gd(EDTA)(H2O)q]- and [Gd(CDTA)(H2O)q]- (q = 2, 3). 1H nuclear magnetic relaxation dispersion (NMRD) data were recorded from aqueous solutions of these complexes using a wide Larmor frequency range (0.01-500 MHz). These data were complemented with 17O transverse relaxation rates and chemical shifts recorded at different temperatures. The simultaneous fit of the NMRD and 17O NMR data was guided by computational studies performed at the DFT and CASSCF/NEVPT2 levels, which provided information on Gd⋯H distances, 17O hyperfine coupling constants and the zero-field splitting (ZFS) energy, which affects electronic relaxation. The hydration equilibrium did not have a very important effect in the fits of the experimental data for [Gd(H2O)q]3+ and [Gd(CDTA)(H2O)q]-, as the hydration equilibrium is largely shifted to the species with the lowest hydration number (q = 8 and 2, respectively). The quality of the analysis improves however considerably for [Gd(EDTA)(H2O)q]- upon considering the effect of the hydration equilibrium. As a result, this study provides for the first time an analysis of the relaxation properties of this important model system, as well as accurate parameters for [Gd(H2O)q]3+ and [Gd(CDTA)(H2O)q]-.
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Affiliation(s)
- Alessandro Nucera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Interdisciplinar de Química e Bioloxía (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121 Alessandria, Italy.
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3
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Liu S, Jiang Y, Liu P, Yi Y, Hou D, Li Y, Liang X, Wang Y, Li Z, He J, Rong H, Wang D, Zhang J. Single-Atom Gadolinium Nano-Contrast Agents with High Stability for Tumor T1 Magnetic Resonance Imaging. ACS NANO 2023; 17:8053-8063. [PMID: 37092888 DOI: 10.1021/acsnano.2c09664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Gadolinium chelates for tumor magnetic resonance imaging (MRI) face challenges such as inadequate sensitivity, lack of selectivity, and risk of Gd leakage. This study presents a single-atom Gd nano-contrast agent (Gd-SA) that enhances tumor MRI. Isolated Gd atoms coordinated by six N atoms and two O atoms are atomically dispersed on a hollow carbon nanosphere, allowing the maximum utilization of Gd atoms with reduced risk of toxic Gd ion leakage. Owning to the large surface area and fast exchange of relaxed water molecules, Gd-SA shows excellent T1-weighted magnetic resonance enhancement with a r1 value of 11.05 mM-1 s-1 at 7 T, which is 3.6 times that of the commercial gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA). In vivo MRI results show that the Gd-SA has a higher spatial resolution and a wider imaging time window for tumors than Gd-DTPA, with low hematological, hepatic, and nephric toxicities. These advantages demonstrate the great potential of single-atom Gd-based nanomaterials as safe, efficient, and long-term MRI contrast agents for cancer diagnosis.
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Affiliation(s)
- Shange Liu
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Yuxing Jiang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China
- Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Pengcheng Liu
- Tianjin University of Technology, Tianjin 300384, China
| | - Yu Yi
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China
| | - Dayong Hou
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China
| | - You Li
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Xiao Liang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yifan Wang
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Zhi Li
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Jia He
- Tianjin University of Technology, Tianjin 300384, China
| | - Hongpan Rong
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Dingsheng Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Jiatao Zhang
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, School of Chemistry and Chemical Engineering, Institute of Engineering Medicine, Beijing Institute of Technology, Beijing 100081, China
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4
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Dai X, Chen Y. Computational Biomaterials: Computational Simulations for Biomedicine. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2204798. [PMID: 35916024 DOI: 10.1002/adma.202204798] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/23/2022] [Indexed: 05/14/2023]
Abstract
With the flourishing development of material simulation methods (quantum chemistry methods, molecular dynamics, Monte Carlo, phase field, etc.), extensive adoption of computing technologies (high-throughput, artificial intelligence, machine learning, etc.), and the invention of high-performance computing equipment, computational simulation tools have sparked the fundamental mechanism-level explorations to predict the diverse physicochemical properties and biological effects of biomaterials and investigate their enormous application potential for disease prevention, diagnostics, and therapeutics. Herein, the term "computational biomaterials" is proposed and the computational methods currently used to explore the inherent properties of biomaterials, such as optical, magnetic, electronic, and acoustic properties, and the elucidation of corresponding biological behaviors/effects in the biomedical field are summarized/discussed. The theoretical calculation of the physiochemical properties/biological performance of biomaterials applied in disease diagnosis, drug delivery, disease therapeutics, and specific paradigms such as biomimetic biomaterials is discussed. Additionally, the biosafety evaluation applications of theoretical simulations of biomaterials are presented. Finally, the challenges and future prospects of such computational simulations for biomaterials development are clarified. It is anticipated that these simulations would offer various methodologies for facilitating the development and future clinical translations/utilization of versatile biomaterials.
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Affiliation(s)
- Xinyue Dai
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China
| | - Yu Chen
- Materdicine Lab, School of Life Sciences, Shanghai University, Shanghai, 200444, P. R. China
- School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
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5
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Keot N, Sarma M. Computational insight into a mechanistic overview of water exchange kinetics and thermodynamic stabilities of bis and tris-aquated complexes of lanthanides. RSC Adv 2023; 13:1516-1529. [PMID: 36688060 PMCID: PMC9816859 DOI: 10.1039/d2ra05810c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/08/2022] [Indexed: 01/09/2023] Open
Abstract
A thorough investigation of Ln3+ complexes with more than one inner-sphere water molecule is crucial for designing high relaxivity contrast agents (CAs) used in magnetic resonance imaging (MRI). This study accomplished a comparative stability analysis of two hexadentate (H3cbda and H3dpaa) and two heptadentate (H4peada and H3tpaa) ligands with Ln3+ ions. The higher stability of the hexadentate H3cbda and heptadentate H4peada ligands has been confirmed by the binding affinity and Gibbs free energy analysis in aqueous solution. In addition, energy decomposition analysis (EDA) reveals the higher binding affinity of the peada4- ligand than the cbda3- ligand towards Ln3+ ions due to the higher charge density of the peada4- ligand. Moreover, a mechanistic overview of water exchange kinetics has been carried out based on the strength of the metal-water bond. The strength of the metal-water bond follows the trend Gd-O47 (w) > Gd-O39 (w) > Gd-O36 (w) in the case of the tris-aquated [Gd(cbda)(H2O)3] and Gd-O43 (w) > Gd-O40 (w) for the bis-aquated [Gd(peada)(H2O)2]- complex, which was confirmed by bond length, electron density (ρ), and electron localization function (ELF) at the corresponding bond critical points. Our analysis also predicts that the activation energy barrier decreases with the decrease in bond strength; hence k ex increases. The 17O and 1H hyperfine coupling constant values of all the coordinated water molecules were different, calculated by using the second-order Douglas-Kroll-Hess (DKH2) approach. Furthermore, the ionic nature of the bonding in the metal-ligand (M-L) bond was confirmed by the Quantum Theory of Atoms-In-Molecules (QTAIM) and ELF along with energy decomposition analysis (EDA). We hope that the results can be used as a basis for the design of highly efficient Gd(iii)-based high relaxivity MRI contrast agents for medical applications.
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Affiliation(s)
- Niharika Keot
- Department of Chemistry, Indian Institute of Technology GuwahatiAssam781039India+91 361 2582318
| | - Manabendra Sarma
- Department of Chemistry, Indian Institute of Technology GuwahatiAssam781039India+91 361 2582318
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6
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Váradi B, Lihi N, Bunda S, Nagy A, Simon G, Kéri M, Papp G, Tircsó G, Esteban-Gómez D, Platas-Iglesias C, Kálmán FK. Physico-Chemical Characterization of a Highly Rigid Gd(III) Complex Formed with a Phenanthroline Derivative Ligand. Inorg Chem 2022; 61:13497-13509. [PMID: 35972786 DOI: 10.1021/acs.inorgchem.2c02050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The discovery of the nephrogenic systemic fibrosis (NSF) and its link with the in vivo dissociation of certain Gd(III)-based contrast agents (CAs) applied in the magnetic resonance imaging (MRI) induced a still growing research to replace the compromised agents with safer alternatives. In recent years, several ligands were designed to exploit the luminescence properties of the lanthanides, containing structurally constrained aromatic moieties, which may form rigid Gd(III) complexes. One of these ligands is (1,10-phenanthroline-2,9-diyl)bis(methyliminodiacetic acid) (H4FENTA) designed and synthesized to sensitize Eu(III) and Tb(III) luminescence. Our results show that the conditional stability of the [Gd(FENTA)]- chelate calculated for physiological pH (pGd = 19.7) is similar to those determined for [Gd(DTPA)]2- (pGd = 19.4) and [Gd(DOTA)]- (pGd = 20.1), routinely used in the clinical practice. The [Gd(FENTA)]- complex is remarkably inert with respect to its dissociation (t1/2 = 872 days at pH = 7 and 25 °C); furthermore, its relaxivity values determined at different field strengths and temperatures (e.g., r1p = 4.3 mM-1s-1at 60 MHz and 37 °C) are ca. one unit higher than those of [Gd(DTPA)]2- (r1p = 3.4 mM-1 s-1) and [Gd(DOTA)]- (r1p = 3.1 mM-1 s-1) under the same conditions. Moreover, significant improvement on the relaxivity was observed in the presence of serum proteins (r1p = 6.9 mM-1 s-1 at 60 MHz and 37 °C). The luminescence lifetimes recorded in H2O and D2O solutions indicate the presence of a water molecule (q = 1) in the inner sphere of the complex directly coordinated to the metal ion, possessing a relatively high water exchange rate (kex298 = 29(2) × 106 s-1). The acceleration of the water exchange can be explained by the steric compression around the water binding site due to the rigid structure of the complex, which was supported by DFT calculations. On the basis of these results, ligands containing a phenanthroline platform have great potential in the design of safer Gd(III) agents for MRI.
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Affiliation(s)
- Balázs Váradi
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary.,Doctoral School of Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen H-4032, Hungary
| | - Norbert Lihi
- ELKH-DE Mechanisms of Complex Homogeneous and Heterogeneous Chemical Reactions Research Group, Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary
| | - Szilvia Bunda
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary
| | - Antónia Nagy
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary
| | - Gréta Simon
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary
| | - Mónika Kéri
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary
| | - Gábor Papp
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Univer-sidade da Coruña, A Coruña, Galicia 15071, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Univer-sidade da Coruña, A Coruña, Galicia 15071, Spain
| | - Ferenc K Kálmán
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Debrecen H-4032, Hungary
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7
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Lucio-Martínez F, Garda Z, Váradi B, Kálmán FK, Esteban-Gómez D, Tóth É, Tircsó G, Platas-Iglesias C. Rigidified Derivative of the Non-macrocyclic Ligand H 4OCTAPA for Stable Lanthanide(III) Complexation. Inorg Chem 2022; 61:5157-5171. [PMID: 35275621 PMCID: PMC8965877 DOI: 10.1021/acs.inorgchem.2c00501] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
![]()
The stability constants
of lanthanide complexes with the potentially
octadentate ligand CHXOCTAPA4–,
which contains a rigid 1,2-diaminocyclohexane scaffold functionalized
with two acetate and two picolinate pendant arms, reveal the formation
of stable complexes [log KLaL = 17.82(1)
and log KYbL = 19.65(1)]. Luminescence
studies on the Eu3+ and Tb3+ analogues evidenced
rather high emission quantum yields of 3.4 and 11%, respectively.
The emission lifetimes recorded in H2O and D2O solutions indicate the presence of a water molecule coordinated
to the metal ion. 1H nuclear magnetic relaxation dispersion
profiles and 17O NMR chemical shift and relaxation measurements
point to a rather low water exchange rate of the coordinated water
molecule (kex298 = 1.58 ×
106 s–1) and relatively high relaxivities
of 5.6 and 4.5 mM–1 s–1 at 20
MHz and 25 and 37 °C, respectively. Density functional theory
calculations and analysis of the paramagnetic shifts induced by Yb3+ indicate that the complexes adopt an unprecedented cis geometry
with the two picolinate groups situated on the same side of the coordination
sphere. Dissociation kinetics experiments were conducted by investigating
the exchange reactions of LuL occurring with Cu2+. The
results confirmed the beneficial effect of the rigid cyclohexyl group
on the inertness of the Lu3+ complex. Complex dissociation
occurs following proton- and metal-assisted pathways. The latter is
relatively efficient at neutral pH, thanks to the formation of a heterodinuclear
hydroxo complex. A
non-macrocyclic ligand containing a rigid cyclohexyl spacer
forms thermodynamically stable complexes with the lanthanide(III)
ions in aqueous solution. The complexes also show remarkable kinetic
inertness, though a structural change facilitates dissociation through
the metal-assisted mechanism for the small lanthanides. The Gd(III)
complex displays a relatively high relaxivity due to the presence
of a water molecule coordinated to the metal ion, while the Eu(III)
and Tb(III) analogues display strong metal-centered luminescence.
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Affiliation(s)
- Fátima Lucio-Martínez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Zoltán Garda
- Department of Physical Chemistry, University of Debrecen, Egyetem tér 1, H-4010 Debrecen, Hungary
| | - Balázs Váradi
- Department of Physical Chemistry, University of Debrecen, Egyetem tér 1, H-4010 Debrecen, Hungary.,Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, H-4010 Debrecen, Hungary
| | - Ferenc Krisztián Kálmán
- Department of Physical Chemistry, University of Debrecen, Egyetem tér 1, H-4010 Debrecen, Hungary
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Éva Tóth
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Université d'Orléans, rue Charles Sadron, 45071 Orléans, Cedex 2, France
| | - Gyula Tircsó
- Department of Physical Chemistry, University of Debrecen, Egyetem tér 1, H-4010 Debrecen, Hungary
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
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8
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Wilharm RK, Ramakrishnam Raju MV, Hoefler JC, Platas-Iglesias C, Pierre VC. Exploiting the Fluxionality of Lanthanide Complexes in the Design of Paramagnetic Fluorine Probes. Inorg Chem 2022; 61:4130-4142. [PMID: 35196450 PMCID: PMC8966431 DOI: 10.1021/acs.inorgchem.1c03908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Fluorine-19 MRI is increasingly being considered as a tool for biomolecular imaging, but the very poor sensitivity of this technique has limited most applications. Previous studies have long established that increasing the sensitivity of 19F molecular probes requires increasing the number of fluorine nuclei per probe as well as decreasing their longitudinal relaxation time. The latter is easily achieved by positioning the fluorine atoms in close proximity to a paramagnetic metal ion such as a lanthanide(III). Increasing the number of fluorine atoms per molecule, however, is only useful inasmuch as all of the fluorine nuclei are chemically equivalent. Previous attempts to achieve this equivalency have focused on designing highly symmetric and rigid fluorinated macrocyclic ligands. A much simpler approach consists of exploiting highly fluxional lanthanide complexes with open coordination sites that have a high affinity for phosphated and phosphonated species. Computational studies indicate that LnIII-TREN-MAM is highly fluxional, rapidly interconverting between at least six distinct isomers. In neutral water at room temperature, LnIII-TREN-MAM binds two or three equivalents of fluorinated phosphonates. The close proximity of the 19F nuclei to the LnIII center in the ternary complex decreases the relaxation times of the fluorine nuclei up to 40-fold. Advantageously, the fluorophosphonate-bound lanthanide complex is also highly fluxional such that all 19F nuclei are chemically equivalent and display a single 19F signal with a small LIS. Dynamic averaging of fluxional fluorinated supramolecular assemblies thus produces effective 19F MR systems.
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Affiliation(s)
- Randall K Wilharm
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | | | - John C Hoefler
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Quıímica, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia Spain
| | - Valérie C Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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9
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Lalli D, Carniato F, Tei L, Platas-Iglesias C, Botta M. Surprising Complexity of the [Gd(AAZTA)(H 2O) 2] - Chelate Revealed by NMR in the Frequency and Time Domains. Inorg Chem 2021; 61:496-506. [PMID: 34890182 PMCID: PMC8753608 DOI: 10.1021/acs.inorgchem.1c03194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
![]()
Typically, Ln(III)
complexes are isostructural along the series,
which enables studying one particular metal chelate to derive the
structural features of the others. This is not the case for [Ln(AAZTA)(H2O)x]− (x = 1, 2) systems, where structural variations along the
series cause changes in the hydration number of the different metal
complexes, and in particular the loss of one of the two metal-coordinated
water molecules between Ho and Er. Herein, we present a 1H field-cycling relaxometry and 17O NMR study that enables
accessing the different exchange dynamics processes involving the
two water molecules bound to the metal center in the [Gd(AAZTA)(H2O)2]− complex. The resulting
picture shows one Gd-bound water molecule with an exchange rate ∼6
times faster than that of the other, due to a longer metal–water
distance, in accordance with density functional theory (DFT) calculations.
The substitution of the more labile water molecule with a fluoride
anion in a diamagnetic-isostructural analogue of the Gd-complex, [Y(AAZTA)(H2O)2]−, allows us to follow the
chemical exchange process by high-resolution NMR and to describe its
thermodynamic behavior. Taken together, the variety of tools offered
by NMR (including high-resolution 1H, 19F NMR
as a function of temperature, 1H longitudinal relaxation
rates vs B0, and 17O transverse
relaxation rates vs T) provides a complete description
of the structure and exchange dynamics of these Ln-complexes along
the series. Herein, we present a 1H field−cycling
relaxometry and 17O NMR study that enables accessing the
different exchange dynamics processes involving the two water molecules
bound to the metal center in the [Gd(AAZTA)(H2O)2]− complex.
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Affiliation(s)
- Daniela Lalli
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy.,Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
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10
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Kofod N, Nawrocki P, Platas-Iglesias C, Sørensen TJ. Electronic Structure of Ytterbium(III) Solvates-a Combined Spectroscopic and Theoretical Study. Inorg Chem 2021; 60:7453-7464. [PMID: 33949865 DOI: 10.1021/acs.inorgchem.1c00743] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The wide range of optical and magnetic properties of lanthanide(III) ions is associated with their intricate electronic structures which, in contrast to lighter elements, is characterized by strong relativistic effects and spin-orbit coupling. Nevertheless, computational methods are now capable of describing the ladder of electronic energy levels of the simpler trivalent lanthanide ions, as well as the lowest energy term of most of the series. The electronic energy levels result from electron configurations that are first split by spin-orbit coupling into groups of energy levels denoted by the corresponding Russell-Saunders terms. Each of these groups are then split by the ligand field into the actual electronic energy levels known as microstates or sometimes mJ levels. The ligand-field splitting directly informs on the coordination geometry and is a valuable tool for determining the structure and thus correlating the structure and properties of metal complexes in solution. The issue with lanthanide complexes is that the determination of complex structures from ligand-field splitting remains a very challenging task. In this paper, the optical spectra-absorption, luminescence excitation, and luminescence emission-of ytterbium(III) solvates were recorded in water, methanol, dimethyl sulfoxide (DMSO), and N,N-dimethylformamide (DMF). The electronic energy levels, that is, the microstates, were resolved experimentally. Subsequently, density functional theory calculations were used to model the structures of the solvates, and ab initio relativistic complete active space self-consistent field calculations (CASSCF) were employed to obtain the microstates of the possible structures of each solvate. By comparing the experimental and theoretical data, it was possible to determine both the coordination number and solution structure of each solvate. In water, methanol, and N,N-dimethylformamide, the solvates were found to be eight-coordinated and have a square antiprismatic coordination geometry. In DMSO, the speciation was found to be more complicated. The robust methodology developed for comparing experimental spectra and computational results allows the solution structures of homoleptic lanthanide complexes to be determined.
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Affiliation(s)
- Nicolaj Kofod
- Department of Chemistry and Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Patrick Nawrocki
- Department of Chemistry and Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Thomas Just Sørensen
- Department of Chemistry and Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
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Lee YS, Mou Z, Opina ACL, Vasalatiy O. Origin of the Isomer Stability of Polymethylated DOTA Chelates Complexed with Ln 3+ ions. Eur J Inorg Chem 2021; 2021:1428-1440. [PMID: 36591318 PMCID: PMC9802879 DOI: 10.1002/ejic.202100019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid)-based chelates that give only a single isomer in solution when complexed with lanthanide (Ln3+) ions is of value for studying protein dynamics and interactions via NMR. Herein, we have investigated the geometries, energetics, and electrostatic potentials of Lu complexed with DOTA (1), ring methylated M4DOTA (2), and arm methylated R-DOTMA (3) and S-DOTMA (4), as well as, both ring and arm methylated 4S-4S-M4DOTMA (5) and 4S-4R-M4DOTMA (6) at the level of M06-L/6-31+G(d)-SDD, to elucidate the origin of the isomer stability. These analyses indicate that the electrostatic repulsion between the arm methyl and the neighboring carboxylate significantly destabilizes the square antiprism (SAP) isomer of Lu-5 and the twisted square antiprism (TSAP) isomer of Lu-6, while the steric repulsion between the ring and arm methyl groups attenuates the stability of both TSAP of Lu-5 and SAP of Lu-6. To rationalize the variable temperature proton NMR spectra, the energy barriers for the inter-conversion in Lu-5 and Lu-6 via arm rotation were also calculated. The modulation of the stability and rigidity of Ln complexes via a modification of DOTA is also discussed. Our investigation will aid to design better chelates for the Ln3+ ions for its use in molecular medicine.
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Affiliation(s)
- Yong-Sok Lee
- Dr. Yong-Sok Lee, Dr. Zhongyu Mou Center for Molecular Modeling, Office of Intramural Research, Center for Information Technology, National Institutes of Health, Bethesda, MD 20892, United States,Present address: Bioinformatics and Computational Bioscience Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, United States
| | - Zhongyu Mou
- Dr. Yong-Sok Lee, Dr. Zhongyu Mou Center for Molecular Modeling, Office of Intramural Research, Center for Information Technology, National Institutes of Health, Bethesda, MD 20892, United States,Present address: Intramural Research Program, National Library of Medicine, National Institutes of Health, Bethesda, MD 20892, United States
| | - Ana Christina L. Opina
- Dr. Ana Christina L. Opina, Dr. Olga Vasalatiy Chemistry and Synthesis Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Rockville, MD 20850, United States
| | - Olga Vasalatiy
- Dr. Ana Christina L. Opina, Dr. Olga Vasalatiy Chemistry and Synthesis Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Rockville, MD 20850, United States
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12
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Nizou G, Molnár E, Hamon N, Kálmán FK, Fougère O, Rousseaux O, Esteban-Gòmez D, Platas-Iglesias C, Beyler M, Tircsó G, Tripier R. Pyclen-Based Ligands Bearing Pendant Picolinate Arms for Gadolinium Complexation. Inorg Chem 2021; 60:2390-2405. [PMID: 33486958 DOI: 10.1021/acs.inorgchem.0c03277] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report the synthesis of two pyclen-based regioisomer ligands (pyclen = 3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15),11,13-triene) functionalized with picolinic acid pendant arms either at positions 3,9-pc2pa (L5) or 3,6-pc2pa (L6) of the macrocyclic fragment. The ligands were prepared by the regiospecific protection of one of the amine nitrogen atoms of the macrocycle using Boc and Alloc protecting groups, respectively. The X-ray structure of the Gd(III) complex of L5 contains trinuclear [(GdL5)3(H2O)3]3+ entities in which the monomeric units are joined by μ2-η1:η1-carboxylate groups. However, the 1H and 89Y NMR spectra of its Y(III) analogue support the formation of monomeric complexes in solution. The Tb(III) complexes are highly luminescent, with emission quantum yields of up to 28% for [TbL5]+. The luminescence lifetimes recorded in H2O and D2O solutions indicate the presence of a water molecule coordinated to the metal ion, as also evidenced by the 1H relaxivities measured for the Gd(III) analogues. The Gd(III) complexes present very different exchange rates of the coordinated water molecule (kex298 = 87.1 × 106 and 1.06 × 106 s-1 for [GdL5]+ and [GdL6]+, respectively). The very high water exchange rate of [GdL5]+ is associated with the steric hindrance originating from the coordination of the ligand around the water binding site, which favors a dissociatively activated water exchange process. The Gd(III) complexes present rather high thermodynamic stabilities (log KGdL = 20.47 and 19.77 for [GdL5]+ and [GdL6]+, respectively). Furthermore, these complexes are remarkably inert with respect to their acid-assisted dissociation, in particular the complex of L5.
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Affiliation(s)
- Gwladys Nizou
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Enikő Molnár
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Nadège Hamon
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Ferenc Krisztián Kálmán
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Olivier Fougère
- Groupe Guerbet, Centre de Recherche d'Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - Olivier Rousseaux
- Groupe Guerbet, Centre de Recherche d'Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - David Esteban-Gòmez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Maryline Beyler
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Raphaël Tripier
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
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Leone L, Camorali S, Freire-García A, Platas-Iglesias C, Esteban Gomez D, Tei L. Scrutinising the role of intramolecular hydrogen bonding in water exchange dynamics of Gd(iii) complexes. Dalton Trans 2021; 50:5506-5518. [DOI: 10.1039/d1dt00204j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The water exchange rate in GdIII-complexes bearing substituted acetophenone moieties is modulated by the ability of peripherical substituents to establish hydrogen bonds with the coordinated and/or second sphere water molecules.
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Affiliation(s)
- Loredana Leone
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT). Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- I-15121 Alessandria
- Italy
| | - Sara Camorali
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT). Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- I-15121 Alessandria
- Italy
| | - Antía Freire-García
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
| | - David Esteban Gomez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT). Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- I-15121 Alessandria
- Italy
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14
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Frías JC, Soriano J, Blasco S, García-España E, Rodríguez-Rodríguez A, Esteban-Gómez D, Carniato F, Botta M, Platas-Iglesias C, Albelda MT. Macrocyclic Pyclen-Based Gd 3+ Complex with High Relaxivity and pH Response. Inorg Chem 2020; 59:7306-7317. [PMID: 32379437 DOI: 10.1021/acs.inorgchem.0c00690] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report the synthesis and characterization of the macrocyclic ligand 2,2'-((2-(3,9-bis(carboxymethyl)-3,6,9-triaza-1(2,6)-pyridinacyclodecaphane-6-yl)ethyl)azanediyl)diacetic acid (H4L) and several of its complexes with lanthanide ions. The structure of the free ligand was determined using X-ray diffraction measurements. Two N atoms of the pyclen moiety in the trans position are protonated in the solid state, together with the exocyclic N atom and one of the carboxylate groups of the ligand. The relaxivity of the Gd3+ complex was found to increase from 6.7 mM-1 s-1 at pH 8.6 to 8.5 mM-1 s-1 below pH ≈ 6.0. Luminescence lifetime measurements recorded from H2O and D2O solutions of the Eu3+ complex evidence the presence of a single complex species in solution at low pH (∼5.0) that contains two inner-sphere water molecules. DFT calculations suggest that the coordination environment of the Ln3+ ion is fulfilled by the four N atoms of the pyclen unit, two oxygen atoms of the macrocyclic acetate groups, and an oxygen atom of an exocyclic carboxylate group. The two inner-sphere water molecules complete coordination number nine around the metal ion. At high pH (∼9.3), the lifetime of the excited 5D0 level of Eu3+ displays a biexponential behavior that can be attributed to the presence of two species in solution with hydration numbers of q = 0 and q = 1. The 1H NMR and DOSY spectra recorded from solutions of the Eu3+ and Y3+ complexes reveal a structural change triggered by pH and the formation of small aggregates at high pH values.
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Affiliation(s)
- Juan C Frías
- Departamento de Ciencias Biomédicas, Universidad CEU-Cardenal Herrera, CEU Universities, C/Ramón y Cajal, s/n, 46115 Alfara del Patriarca, Valencia, Spain
| | - José Soriano
- Departamento de Quı́mica Inorgánica, Instituto de Ciencia Molecular, Universidad de Valencia, Edificio de Institutos de Paterna, Apdo 22085, 46071 Valencia, Spain
| | - Salvador Blasco
- Departamento de Quı́mica Inorgánica, Instituto de Ciencia Molecular, Universidad de Valencia, Edificio de Institutos de Paterna, Apdo 22085, 46071 Valencia, Spain
| | - Enrique García-España
- Departamento de Quı́mica Inorgánica, Instituto de Ciencia Molecular, Universidad de Valencia, Edificio de Institutos de Paterna, Apdo 22085, 46071 Valencia, Spain
| | - Aurora Rodríguez-Rodríguez
- Centro de Investigacións Cientı́ficas Avanzadas (CICA) and Departamento de Quı́mica, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - David Esteban-Gómez
- Centro de Investigacións Cientı́ficas Avanzadas (CICA) and Departamento de Quı́mica, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
| | - Carlos Platas-Iglesias
- Centro de Investigacións Cientı́ficas Avanzadas (CICA) and Departamento de Quı́mica, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - M Teresa Albelda
- Departamento de Quı́mica Inorgánica, Universidad de Valencia, C/Dr. Moliner 50, 46100 Burjasot, Valencia, Spain
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Garda Z, Nagy V, Rodríguez-Rodríguez A, Pujales-Paradela R, Patinec V, Angelovski G, Tóth É, Kálmán FK, Esteban-Gómez D, Tripier R, Platas-Iglesias C, Tircsó G. Unexpected Trends in the Stability and Dissociation Kinetics of Lanthanide(III) Complexes with Cyclen-Based Ligands across the Lanthanide Series. Inorg Chem 2020; 59:8184-8195. [DOI: 10.1021/acs.inorgchem.0c00520] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Zoltán Garda
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Viktoria Nagy
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Aurora Rodríguez-Rodríguez
- Centro de Investigacións Cientı́ficas Avanzadas and Departamento de Quı́mica, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia, Spain
| | - Rosa Pujales-Paradela
- Centro de Investigacións Cientı́ficas Avanzadas and Departamento de Quı́mica, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia, Spain
| | - Véronique Patinec
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6, av. Victor le Gorgeu, 29200 Brest, France
| | - Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Éva Tóth
- Centre de Biophysique Moléculaire, UPR 4301, CNRS, Université d’Orléans, rue Charles Sadron, 45071 Orléans, Cedex 2, France
| | - Ferenc K. Kálmán
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - David Esteban-Gómez
- Centro de Investigacións Cientı́ficas Avanzadas and Departamento de Quı́mica, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia, Spain
| | - Raphaël Tripier
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6, av. Victor le Gorgeu, 29200 Brest, France
| | - Carlos Platas-Iglesias
- Centro de Investigacións Cientı́ficas Avanzadas and Departamento de Quı́mica, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia, Spain
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
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16
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Charpentier C, Salaam J, Nonat A, Carniato F, Jeannin O, Brandariz I, Esteban-Gomez D, Platas-Iglesias C, Charbonnière LJ, Botta M. pH-Dependent Hydration Change in a Gd-Based MRI Contrast Agent with a Phosphonated Ligand. Chemistry 2020; 26:5407-5418. [PMID: 31923335 DOI: 10.1002/chem.201904904] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 12/05/2019] [Indexed: 12/12/2022]
Abstract
The heptadentate ligand L was shown to form an extremely stable Gd complex at neutral pH with a pGd value of 18.4 at pH 7.4. The X-ray crystal structures of the complexes formed with Gd and Tb displayed two very different coordination behaviors being, respectively, octa- and nonacoordinated. The relaxometric properties of the Gd complex were studied by field-dependent relaxivity measurements at various temperatures and by 17 O NMR spectroscopy. The pH-dependence of the longitudinal relaxivity profile indicated large changes around neutral pH leading to a very large value of 10.1 mm-1 ⋅s-1 (60 MHz, 298 K) at pH 4.7. The changes were attributed to an increase of the hydration number from one water molecule in basic conditions to two at acidic pH. A similar trend was observed for the luminescence of the Eu complex, confirming the change in hydration state. DOSY experiments were performed on the Lu analogue, pointing to the absence of dimers in solution in the considered pH range. A breathing mode of the complex was postulated, which was further supported by 1 H and 31 P NMR spectroscopy of the Yb complex at varying pH and was finally modeled by DFT calculations.
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Affiliation(s)
- Cyrille Charpentier
- Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS/Université de Strasbourg, ECPM, 25 rue Becquerel, Bâtiment R1N0, 67087, Strasbourg Cedex 02, France
| | - Jérémy Salaam
- Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS/Université de Strasbourg, ECPM, 25 rue Becquerel, Bâtiment R1N0, 67087, Strasbourg Cedex 02, France
| | - Aline Nonat
- Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS/Université de Strasbourg, ECPM, 25 rue Becquerel, Bâtiment R1N0, 67087, Strasbourg Cedex 02, France
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121, Alessandria, Italy
| | - Olivier Jeannin
- CNRS, ISCR-UMR6226, Université de Rennes, 35000, Rennes, France
| | - Isabel Brandariz
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008, A Coruña, Spain
| | - David Esteban-Gomez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008, A Coruña, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008, A Coruña, Spain
| | - Loïc J Charbonnière
- Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS/Université de Strasbourg, ECPM, 25 rue Becquerel, Bâtiment R1N0, 67087, Strasbourg Cedex 02, France
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, 15121, Alessandria, Italy
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17
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Peters JA, Djanashvili K, Geraldes CF, Platas-Iglesias C. The chemical consequences of the gradual decrease of the ionic radius along the Ln-series. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213146] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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18
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Rodríguez-Rodríguez A, Arnosa-Prieto Á, Brandariz I, Esteban-Gómez D, Platas-Iglesias C. Axial Ligation in Ytterbium(III) DOTAM Complexes Rationalized with Multireference and Ligand-Field ab Initio Calculations. J Phys Chem A 2020; 124:1362-1371. [DOI: 10.1021/acs.jpca.9b11683] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aurora Rodríguez-Rodríguez
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Ángela Arnosa-Prieto
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Isabel Brandariz
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
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19
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Wang G, Platas-Iglesias C, Angelovski G. Europium(III) Macrocyclic Chelates Appended with Tyrosine-based Chromophores and Di-(2-picolyl)amine-based Receptors: Turn-On Luminescent Chemosensors Selective to Zinc(II) Ions. Chempluschem 2020; 85:806-814. [PMID: 31967740 DOI: 10.1002/cplu.201900731] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/08/2020] [Indexed: 11/06/2022]
Abstract
Zinc ions play an important role in many biological processes in the human body. To selectively detect Zn2+ , two EuDO3A-based complexes (DO3A=1,4,7,10-tetraazacyclododecane-1,4,7-tricarboxylic acid) appended with tyrosine as a chromophore and di-(2-picolyl)amine (DPA) as the Zn2+ recognition moiety were developed as suitable luminescent sensors. Their luminescence intensity is affected by the photoinduced electron transfer mechanism. Upon addition of Zn2+ , both probes display an up to sevenfold enhancement in Eu3+ emission. Competition experiments demonstrated their specificity toward Zn2+ over other metal ions, while also revealing the nonspecificity of the derivatives lacking the DPA-moiety, thus confirming the essential role of the DPA for the recognition of Zn2+ . The induced emission changes of Eu3+ allow for precise quantitative analysis of Zn2+ , establishing these lanthanide-based complexes as viable chemosensors for biological applications.
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Affiliation(s)
- Gaoji Wang
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, Max-Planck-Ring 11, 72076, Tübingen, Germany
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química Facultade de Ciencias, Universidade da Coruña, A Coruña, Galicia, Spain
| | - Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, Max-Planck-Ring 11, 72076, Tübingen, Germany
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20
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Baranyai Z, Delli Castelli D, Platas-Iglesias C, Esteban-Gomez D, Bényei A, Tei L, Botta M. Combined NMR, DFT and X-ray studies highlight structural and hydration changes of [Ln(AAZTA)]− complexes across the series. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01442j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
1H NMR, CEST, DFT and X-ray studies reveal that [Ln(AAZTA)]− chelates experience a transition across the Ln(iii) series from fast-exchanging, bisaqua 9-coordinate species, to slow-exchanging monoaqua 8-coordinate structures.
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Affiliation(s)
- Zsolt Baranyai
- Bracco Imaging SpA
- Bracco Research Center
- Colleretto Giacosa (TO)
- Italy
| | - Daniela Delli Castelli
- Department of Molecular Biotechnology and Health Science
- University of Turin
- 10126 Torino
- Italy
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
| | - David Esteban-Gomez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
| | - Attila Bényei
- Department of Physical Chemistry
- Faculty of Science and Technology
- University of Debrecen
- Hungary
| | - Lorenzo Tei
- Department of Science and Technological Innovation
- Università del Piemonte Orientale
- Alessandria
- Italy
| | - Mauro Botta
- Department of Science and Technological Innovation
- Università del Piemonte Orientale
- Alessandria
- Italy
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21
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Huang P. Understanding the Stability Trend Along Light Lanthanide Complexes with an Ehtylenediamine‐Type Ligand: A Quantum Chemical Study. ChemistrySelect 2019. [DOI: 10.1002/slct.201902887] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pin‐Wen Huang
- Zhejiang University of Water Resources and Electric Power Hangzhou 310018 Zhejiang China
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22
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Porcar-Tost O, Olivares JA, Pallier A, Esteban-Gómez D, Illa O, Platas-Iglesias C, Tóth É, Ortuño RM. Gadolinium Complexes of Highly Rigid, Open-Chain Ligands Containing a Cyclobutane Ring in the Backbone: Decreasing Ligand Denticity Might Enhance Kinetic Inertness. Inorg Chem 2019; 58:13170-13183. [PMID: 31524387 DOI: 10.1021/acs.inorgchem.9b02044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In an effort to explore novel ligand scaffolds for stable and inert lanthanide complexation in magnetic resonance imaging contrast agent research, three chiral ligands containing a highly rigid (1S,2S)-1,2-cyclobutanediamine spacer and different number of acetate and picolinate groups were efficiently synthesized. Potentiometric studies show comparable thermodynamic stability for the Gd3+ complexes formed with either the octadentate (L3)4- bearing two acetate or two picolinate groups or the heptadentate (L2)4- analogue bearing one picolinate and three acetate groups (log KGdL = 17.41 and 18.00 for [Gd(L2)]- and [Gd(L3)]-, respectively). In contrast, their dissociation kinetics is revealed to be very different: the monohydrated [Gd(L3)]- is considerably more labile, as a result of the significant kinetic activity of the protonated picolinate function, as compared to the bishydrated [Gd(L2)]-. This constitutes an uncommon example in which lowering ligand denticity results in a remarkable increase in kinetic inertness. Another interesting observation is that the rigid ligand backbone induces an unusually strong contribution of the spontaneous dissociation to the overall decomplexation process. Thanks to the presence of two inner-sphere water molecules, [Gd(L2)]- is endowed with high relaxivity (r1 = 7.9 mM-1 s-1 at 20 MHz, 25 °C), which is retained in the presence of large excess of endogenous anions, excluding ternary complex formation. The water exchange rate is similar for [Gd(L3)]- and [Gd(L2)]-, while it is 1 order of magnitude higher for the trishydrated tetraacetate analogue [Gd(L1)]- (kex298 = 8.1, 10, and 127 × 106 s-1, respectively). A structural analysis via density functional theory calculations suggests that the large bite angle imposed by the rigid (1S,2S)-1,2-cyclobutanediamine spacer could allow the design of ligands based on this scaffold with suitable properties for the coordination of larger metal ions with biomedical applications.
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Affiliation(s)
- Oriol Porcar-Tost
- Departament de Química , Universitat Autònoma de Barcelona , 08193 Cerdanyola del Vallès , Barcelona , Spain
| | - José A Olivares
- Departament de Química , Universitat Autònoma de Barcelona , 08193 Cerdanyola del Vallès , Barcelona , Spain
| | - Agnès Pallier
- Centre de Biophysique Moléculaire , UPR 4301, CNRS, Université d'Orléans , rue Charles Sadron , 45071 Orléans Cedex 2 , France
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas and Departamento de Química , Universidade da Coruña , Campus da Zapateira-Rúa da Fraga 10 , 15008 A Coruña , Spain
| | - Ona Illa
- Departament de Química , Universitat Autònoma de Barcelona , 08193 Cerdanyola del Vallès , Barcelona , Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Química , Universidade da Coruña , Campus da Zapateira-Rúa da Fraga 10 , 15008 A Coruña , Spain
| | - Éva Tóth
- Centre de Biophysique Moléculaire , UPR 4301, CNRS, Université d'Orléans , rue Charles Sadron , 45071 Orléans Cedex 2 , France
| | - Rosa M Ortuño
- Departament de Química , Universitat Autònoma de Barcelona , 08193 Cerdanyola del Vallès , Barcelona , Spain
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23
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Toljić Ð, Platas-Iglesias C, Angelovski G. In-depth Study of a Novel Class of Ditopic Gadolinium(III)-based MRI Probes Sensitive to Zwitterionic Neurotransmitters. Front Chem 2019; 7:490. [PMID: 31396504 PMCID: PMC6668053 DOI: 10.3389/fchem.2019.00490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 06/25/2019] [Indexed: 01/22/2023] Open
Abstract
The efficacy of Gd-based low-molecular weight ditopic MRI probes on binding zwitterionic neurotransmitters (ZNTs) relies on their structural compatibility. ZNTs are challenging biomarkers for monitoring chemical neurotransmission due to their intrinsic complexity as target molecules. In this work, we focus on tuning the cyclen- and azacrown ether-based binding sites properties to increase the affinity toward ZNTs. Our approach consisted in performing structural modifications on the binding sites in terms of charge and size, followed by the affinity evaluation through T1-weighted relaxometric titrations. We prepared and investigated six Gd3+ complexes with different structures and thus properties, which were found to be acetylcholine insensitive; moreover, two of them displayed considerably stronger affinity toward glutamate and glycine over hydrogencarbonate and other ZNTs. Complexes with small and non-charged or no substituents on the azacrown moiety displayed the highest affinities toward ZNTs, followed by strong decrease in longitudinal relaxivity r1 of around 70%. In contrast, hosts with negatively charged substituents exhibited lower decrease in r1 of nearly 30%. The thorough investigations involving relaxometric titrations, luminescence, and NMR diffusion experiments, as well as theoretical density functional theory calculations, revealed that the affinity of reported hosts toward ZNTs is greatly affected by the remote pendant on the azacrown derivative.
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Affiliation(s)
- Ðorđe Toljić
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas, Departamento de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña, Spain
| | - Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany
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24
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Farkas E, Vágner A, Negri R, Lattuada L, Tóth I, Colombo V, Esteban-Gómez D, Platas-Iglesias C, Notni J, Baranyai Z, Giovenzana GB. PIDAZTA: Structurally Constrained Chelators for the Efficient Formation of Stable Gallium-68 Complexes at Physiological pH. Chemistry 2019; 25:10698-10709. [PMID: 31149749 DOI: 10.1002/chem.201901512] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/28/2019] [Indexed: 12/11/2022]
Abstract
Two structurally constrained chelators based on a fused bicyclic scaffold, 4-amino-4-methylperhydro-pyrido[1,2-a][1,4]diazepin-N,N',N'-triacetic acids [(4R*,10aS*)-PIDAZTA (L1) and (4R*,10aR*)-PIDAZTA (L2)], were designed for the preparation of GaIII -based radiopharmaceuticals. The stereochemistry of the ligand scaffold has a deep impact on the properties of the complexes, with unexpected [Ga(L2)OH] species being superior in terms of both thermodynamic stability and inertness. This peculiar behavior was rationalized on the basis of molecular modeling and appears to be related to a better fit in size of GaIII into the cavity of L2. Fast and efficient formation of the GaIII chelates at room temperature was observed at pH values between 7 and 8, which enables 68 Ga radiolabeling under truly physiological conditions (pH 7.4).
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Affiliation(s)
- Edit Farkas
- Dept. of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary
| | - Adrienn Vágner
- Dept. of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary
| | - Roberto Negri
- Dip. di Scienze del Farmaco, Università del Piemonte Orientale, Largo Donegani 2/3, 28100, Novara, Italy
| | - Luciano Lattuada
- Bracco Imaging spa, Bracco Research Centre, Via Ribes 5, 10010, Colleretto Giacosa (TO), Italy
| | - Imre Tóth
- Dept. of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary.,Dept. of Physical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary
| | - Valentina Colombo
- Dip. di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milano, Italy
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Dep. de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Dep. de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Johannes Notni
- Institute of Pathology, Technische Universität München, Trogerstrasse 18, 81675, Munich, Germany
| | - Zsolt Baranyai
- Dept. of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary.,Bracco Imaging spa, Bracco Research Centre, Via Ribes 5, 10010, Colleretto Giacosa (TO), Italy
| | - Giovanni B Giovenzana
- Dip. di Scienze del Farmaco, Università del Piemonte Orientale, Largo Donegani 2/3, 28100, Novara, Italy
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25
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Pujales-Paradela R, Savić T, Pérez-Lourido P, Esteban-Gómez D, Angelovski G, Botta M, Platas-Iglesias C. Lanthanide Complexes with 1H paraCEST and 19F Response for Magnetic Resonance Imaging Applications. Inorg Chem 2019; 58:7571-7583. [DOI: 10.1021/acs.inorgchem.9b00869] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Rosa Pujales-Paradela
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia Spain
| | - Tanja Savić
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Paulo Pérez-Lourido
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310 Pontevedra, Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia Spain
| | - Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, 15121 Alessandria, Italy
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia Spain
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26
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Esteban-Gómez D, Büldt LA, Pérez-Lourido P, Valencia L, Seitz M, Platas-Iglesias C. Understanding the Optical and Magnetic Properties of Ytterbium(III) Complexes. Inorg Chem 2019; 58:3732-3743. [DOI: 10.1021/acs.inorgchem.8b03354] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas and Departamento de Química Fundamental, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Laura A. Büldt
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Paulo Pérez-Lourido
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310 Pontevedra, Spain
| | - Laura Valencia
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310 Pontevedra, Spain
| | - Michael Seitz
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Química Fundamental, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
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27
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Pujales‐Paradela R, Savić T, Esteban‐Gómez D, Angelovski G, Carniato F, Botta M, Platas‐Iglesias C. Gadolinium(III)‐Based Dual1H/19F Magnetic Resonance Imaging Probes. Chemistry 2019; 25:4782-4792. [DOI: 10.1002/chem.201806192] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Rosa Pujales‐Paradela
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento, de QuímicaFacultade de CienciasUniversidade da Coruña 15071 A Coruña Galicia Spain
| | - Tanja Savić
- MR Neuroimaging AgentsMax Planck Institute for Biological Cybernetics Tübingen Germany
| | - David Esteban‐Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento, de QuímicaFacultade de CienciasUniversidade da Coruña 15071 A Coruña Galicia Spain
| | - Goran Angelovski
- MR Neuroimaging AgentsMax Planck Institute for Biological Cybernetics Tübingen Germany
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione TecnologicaUniversità del Piemonte Orientale “A. Avogadro” Viale T. Michel 11 15121 Alessandria Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione TecnologicaUniversità del Piemonte Orientale “A. Avogadro” Viale T. Michel 11 15121 Alessandria Italy
| | - Carlos Platas‐Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento, de QuímicaFacultade de CienciasUniversidade da Coruña 15071 A Coruña Galicia Spain
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28
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Nonat A, Bahamyirou S, Lecointre A, Przybilla F, Mély Y, Platas-Iglesias C, Camerel F, Jeannin O, Charbonnière LJ. Molecular Upconversion in Water in Heteropolynuclear Supramolecular Tb/Yb Assemblies. J Am Chem Soc 2019; 141:1568-1576. [PMID: 30612432 DOI: 10.1021/jacs.8b10932] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Piling up excited states to reach upconversion (UC) is severely restricted by vibrational quenching mechanisms, especially when one looks at discrete molecular entities in solution. By carefully controlling the supramolecular assembly processes resulting from the strong electrostatic interactions between negatively charged Yb complexes and Tb3+ cations in aqueous solutions, we engineered the formation of heteropolynuclear complexes of [(YbL)2Tb x] compositions ( x = 1 and 2). These edifices display a phenomenon of cooperative photosensitization UC with green emission of the Tb cations upon NIR excitation at 980 nm in the Yb absorption band. The photophysical properties of the complexes were carefully investigated by steady-state and time-resolved luminescence experiments in D2O, allowing one to quantify the impact of the composition and pD of the solution on the emission intensity as well as clarifying the exact cooperative photosensitization upconversion mechanism. Using optimized conditions, the energy transfer UC process could be observed for the first time in nondeuterated water with discrete molecular compounds.
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Affiliation(s)
- Aline Nonat
- Equipe de Synthèse pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC, UMR 7178) , CNRS/Université de Strasbourg , ECPM, 25 Rue Becquerel , 67087 Strasbourg Cedex, France
| | - Sylvana Bahamyirou
- Equipe de Synthèse pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC, UMR 7178) , CNRS/Université de Strasbourg , ECPM, 25 Rue Becquerel , 67087 Strasbourg Cedex, France
| | - Alexandre Lecointre
- Equipe de Synthèse pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC, UMR 7178) , CNRS/Université de Strasbourg , ECPM, 25 Rue Becquerel , 67087 Strasbourg Cedex, France
| | - Frédéric Przybilla
- Laboratoire de Bioimagerie et Pathologies, CNRS UMR 7021, Faculté de Pharmacie CS60024 74, Route du Rhin , 67401 Illkirch-Graffenstaden , France
| | - Yves Mély
- Laboratoire de Bioimagerie et Pathologies, CNRS UMR 7021, Faculté de Pharmacie CS60024 74, Route du Rhin , 67401 Illkirch-Graffenstaden , France
| | - Carlos Platas-Iglesias
- React Group, Departamento de Química, Facultade de Ciencias, and Centro de Investigacións Científicas Avanzadas (CICA) , Universidade da Coruña , 15071 A Coruña , Spain
| | - Franck Camerel
- Université de Rennes , CNRS, ISCR-UMR 6226, F-35000 Rennes , France
| | - Olivier Jeannin
- Université de Rennes , CNRS, ISCR-UMR 6226, F-35000 Rennes , France
| | - Loïc J Charbonnière
- Equipe de Synthèse pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC, UMR 7178) , CNRS/Université de Strasbourg , ECPM, 25 Rue Becquerel , 67087 Strasbourg Cedex, France
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29
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Leone L, Esteban-Gómez D, Platas-Iglesias C, Milanesio M, Tei L. Accelerating water exchange in GdIII–DO3A-derivatives by favouring the dissociative mechanism through hydrogen bonding. Chem Commun (Camb) 2019; 55:513-516. [DOI: 10.1039/c8cc08556k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The water exchange rate in GdIII-complexes increases by one order of magnitude due to H-bonding between the phenol(ate) group and the water molecules involved in the dissociative exchange mechanism.
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Affiliation(s)
- Loredana Leone
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT)
- Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- Viale T. Michel 11
- I-15121 Alessandria
- Italy
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias, Universidade da Coruña
- 15071 A Coruña
- Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias, Universidade da Coruña
- 15071 A Coruña
- Spain
| | - Marco Milanesio
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT)
- Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- Viale T. Michel 11
- I-15121 Alessandria
- Italy
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT)
- Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- Viale T. Michel 11
- I-15121 Alessandria
- Italy
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30
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Nonat A, Esteban-Gómez D, Valencia L, Pérez-Lourido P, Barriada JL, Charbonnière LJ, Platas-Iglesias C. The role of ligand to metal charge-transfer states on the luminescence of Europium complexes with 18-membered macrocyclic ligands. Dalton Trans 2019; 48:4035-4045. [DOI: 10.1039/c8dt05005h] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The stabilization of a divalent Europium provides an efficient pathway for the quenching of the luminescence in ten-coordinate macrocyclic complexes.
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Affiliation(s)
- Aline Nonat
- Synthèse pour l'Analyse (SynPA)
- Institut Pluridisciplinaire Hubert Curien (IPHC
- UMR 7178
- CNRS/Université de Strasbourg)
- ECPM
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- Campus da Zapateira-Rúa da Fraga 10
- 15008 A Coruña
- Spain
| | - Laura Valencia
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidade de Vigo
- 36310 Pontevedra
- Spain
| | - Paulo Pérez-Lourido
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidade de Vigo
- 36310 Pontevedra
- Spain
| | - José Luis Barriada
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- Campus da Zapateira-Rúa da Fraga 10
- 15008 A Coruña
- Spain
| | - Loïc J. Charbonnière
- Synthèse pour l'Analyse (SynPA)
- Institut Pluridisciplinaire Hubert Curien (IPHC
- UMR 7178
- CNRS/Université de Strasbourg)
- ECPM
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- Campus da Zapateira-Rúa da Fraga 10
- 15008 A Coruña
- Spain
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31
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Caravan P, Esteban-Gómez D, Rodríguez-Rodríguez A, Platas-Iglesias C. Water exchange in lanthanide complexes for MRI applications. Lessons learned over the last 25 years. Dalton Trans 2019; 48:11161-11180. [DOI: 10.1039/c9dt01948k] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Coordination chemistry offers convenient strategies to modulate the exchange of coordinated water molecules in lanthanide-based contrast agents.
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Affiliation(s)
- Peter Caravan
- The Institute for Innovation in Imaging and the A. A. Martinos Center for Biomedical Imaging
- Massachusetts General Hospital
- Harvard Medical School
- Charlestown
- USA
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- 15008 A Coruña
- Spain
| | - Aurora Rodríguez-Rodríguez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- 15008 A Coruña
- Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- 15008 A Coruña
- Spain
- The Institute for Innovation in Imaging and the A. A. Martinos Center for Biomedical Imaging
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32
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Modeling intramolecular energy transfer in lanthanide chelates: A critical review and recent advances. INCLUDING ACTINIDES 2019. [DOI: 10.1016/bs.hpcre.2019.08.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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33
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Connah L, Truffault V, Platas-Iglesias C, Angelovski G. Investigations into the effects of linker length elongation on the behaviour of calcium-responsive MRI probes. Dalton Trans 2019; 48:13546-13554. [DOI: 10.1039/c9dt02672j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The effects of subtle structural changes on the coordination behaviour and subsequent relaxometric properties of two novel calcium-responsive magnetic resonance imaging probes have been assessed via a range of physicochemical techniques.
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Affiliation(s)
- Liam Connah
- MR Neuroimaging Agents
- Max Planck Institute for Biological Cybernetics
- 72076 Tuebingen
- Germany
| | - Vincent Truffault
- Max Planck Institute for Developmental Biology
- 72076 Tuebingen
- Germany
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
| | - Goran Angelovski
- MR Neuroimaging Agents
- Max Planck Institute for Biological Cybernetics
- 72076 Tuebingen
- Germany
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34
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Dee C, Esteban-Gómez D, Platas-Iglesias C, Seitz M. Long Wavelength Excitation of Europium Luminescence in Extended, Carboline-Based Cryptates. Inorg Chem 2018; 57:7390-7401. [DOI: 10.1021/acs.inorgchem.8b01031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carolin Dee
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Michael Seitz
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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35
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Forgács A, Pujales-Paradela R, Regueiro-Figueroa M, Valencia L, Esteban-Gómez D, Botta M, Platas-Iglesias C. Developing the family of picolinate ligands for Mn 2+ complexation. Dalton Trans 2018; 46:1546-1558. [PMID: 28091671 DOI: 10.1039/c6dt04442e] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We have reported here a series of ligands containing pentadentate 6,6'-(azanediylbis(methylene))dipicolinic acid units that differ in the substituent present at the amine nitrogen atom (acetate: H3DPAAA; phenyl: H2DPAPhA; dodecyl: H2DPAC12A; 4-hexylphenyl: H2DPAC6PhA). The protonation constants of the hexadentate DPAAA3- and pentadentate DPAPhA2- ligands and the stability constants of their Mn2+ complexes were determined using pH-potentiometry (25 °C, 0.15 M NaCl). The mono-hydrated [Mn(DPAAA)]- complex (log KMnL = 13.19(5)) was found to be considerably more stable than the bis-hydrated [Mn(DPAPhA)] analogue (log KMnL = 9.55(1)). A detailed 1H and 17O NMR relaxometric study was carried out to determine the parameters that govern the proton relaxivities of these complexes. The [Mn(DPAC12A)] complex, which contains a dodecyl lipophilic chain, forms micelles in solution characterized by a critical micellar concentration (cmc) of 96(9) μM. The lipophilic [Mn(DPAC6PhA)] and [Mn(DPAC12A)] derivatives form rather strong adducts with Human Serum Albumin (HSA) with association constants of 7.1 ± 0.1 × 103 and 1.3 ± 0.4 × 105 M-1, respectively. The X-ray structure of the complex {K(H2O)4}{[Mn(DPAAA)(H2O)]}2 shows that the Mn2+ ion in [Mn(DPAAA)]- is coordinated to the six donor atoms of the ligand, a coordinated water molecule completing the pentagonal bipyramidal coordination environment.
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Affiliation(s)
- Attila Forgács
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Rosa Pujales-Paradela
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
| | - Martín Regueiro-Figueroa
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
| | - Laura Valencia
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310 Pontevedra, Spain
| | - David Esteban-Gómez
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy.
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
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36
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A Coordination Chemistry Approach to Fine-Tune the Physicochemical Parameters of Lanthanide Complexes Relevant to Medical Applications. Chemistry 2018; 24:3127-3131. [DOI: 10.1002/chem.201705528] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Indexed: 12/23/2022]
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37
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Le Fur M, Beyler M, Molnár E, Fougère O, Esteban-Gómez D, Tircsó G, Platas-Iglesias C, Lepareur N, Rousseaux O, Tripier R. Stable and Inert Yttrium(III) Complexes with Pyclen-Based Ligands Bearing Pendant Picolinate Arms: Toward New Pharmaceuticals for β-Radiotherapy. Inorg Chem 2018; 57:2051-2063. [PMID: 29400452 DOI: 10.1021/acs.inorgchem.7b02953] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mariane Le Fur
- Université de Bretagne Occidentale, UMR-CNRS 6521, IBSAM, UFR des Sciences et Techniques, 6 avenue
Victor le Gorgeu, C.S. 93837, 29238 BREST Cedex 3, France
| | - Maryline Beyler
- Université de Bretagne Occidentale, UMR-CNRS 6521, IBSAM, UFR des Sciences et Techniques, 6 avenue
Victor le Gorgeu, C.S. 93837, 29238 BREST Cedex 3, France
| | - Enikő Molnár
- Department
of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Olivier Fougère
- Groupe Guerbet, Centre de Recherche d’Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - David Esteban-Gómez
- Departamento de Química, Facultade de Ciencias & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
| | - Gyula Tircsó
- Department
of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Carlos Platas-Iglesias
- Departamento de Química, Facultade de Ciencias & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
| | - Nicolas Lepareur
- Département
de Médecine Nucléaire, Centre Eugène Marquis, INSERM U1241, Avenue de la Bataille Flandres, Dunkerque CS 44229, 35042 Rennes, Cedex, France
| | - Olivier Rousseaux
- Groupe Guerbet, Centre de Recherche d’Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - Raphaël Tripier
- Université de Bretagne Occidentale, UMR-CNRS 6521, IBSAM, UFR des Sciences et Techniques, 6 avenue
Victor le Gorgeu, C.S. 93837, 29238 BREST Cedex 3, France
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38
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Pujales-Paradela R, Rodríguez-Rodríguez A, Gayoso-Padula A, Brandariz I, Valencia L, Esteban-Gómez D, Platas-Iglesias C. On the consequences of the stereochemical activity of the Bi(iii) 6s2 lone pair in cyclen-based complexes. The [Bi(DO3A)] case. Dalton Trans 2018; 47:13830-13842. [DOI: 10.1039/c8dt02602e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The spatial arrangement of donor atoms in Bi(iii) cyclen derivatives modulates the orientation and activity of the 6s2 lone pair.
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Affiliation(s)
- Rosa Pujales-Paradela
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Aurora Rodríguez-Rodríguez
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Antonella Gayoso-Padula
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Isabel Brandariz
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Laura Valencia
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidade de Vigo
- 36310 Pontevedra
- Spain
| | - David Esteban-Gómez
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
| | - Carlos Platas-Iglesias
- Universidade da Coruña
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- A Coruña
- Spain
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39
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Zhang L, Martins AF, Zhao P, Tieu M, Esteban-Gomez D, McCandless GT, Platas-Iglesias C, Sherry AD. Enantiomeric Recognition of d- and l-Lactate by CEST with the Aid of a Paramagnetic Shift Reagent. J Am Chem Soc 2017; 139:17431-17437. [PMID: 29083166 PMCID: PMC5796655 DOI: 10.1021/jacs.7b08292] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A previous report demonstrated that EuDO3A could be used as an NMR shift reagent for imaging extracellular lactate produced by cancer cells using CEST imaging. In this work, a series of heptadentate macrocyclic YbDO3A-trisamide complexes with δ-chiral carbons in the three pendant side-arms were examined as shift reagents for lactate detection. High resolution 1H NMR spectra and DFT calculations provided evidence for the formation of stereoselective lactate·YbDO3A-trisamide complexes each with a different CEST signature. This stereoselectivity allowed discrimination of d- versus l-lactate by both high-resolution NMR and CEST. This work demonstrates that lanthanide-based paramagnetic shift reagents can be designed to detect important metabolites by CEST MRI selectively.
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Affiliation(s)
- Lei Zhang
- Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - André F. Martins
- Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
- Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
| | - Piyu Zhao
- Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - Michael Tieu
- Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - David Esteban-Gomez
- Departamento de Química, Facultade de Ciencias & Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
| | - Gregory T. McCandless
- Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - Carlos Platas-Iglesias
- Departamento de Química, Facultade de Ciencias & Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
| | - A. Dean Sherry
- Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
- Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
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40
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Tei L, Gugliotta G, Gambino G, Fekete M, Botta M. Developing High Field MRI Contrast Agents by Tuning the Rotational Dynamics: Bisaqua GdAAZTA-based Dendrimers. Isr J Chem 2017. [DOI: 10.1002/ijch.201700041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica; Università del Piemonte Orientale “A. Avogadro”; Viale Teresa Michel 11 15121 Alessandria Italy
| | - Giuseppe Gugliotta
- Dipartimento di Scienze e Innovazione Tecnologica; Università del Piemonte Orientale “A. Avogadro”; Viale Teresa Michel 11 15121 Alessandria Italy
| | - Giuseppe Gambino
- Dipartimento di Scienze e Innovazione Tecnologica; Università del Piemonte Orientale “A. Avogadro”; Viale Teresa Michel 11 15121 Alessandria Italy
| | - Marianna Fekete
- Dipartimento di Scienze e Innovazione Tecnologica; Università del Piemonte Orientale “A. Avogadro”; Viale Teresa Michel 11 15121 Alessandria Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica; Università del Piemonte Orientale “A. Avogadro”; Viale Teresa Michel 11 15121 Alessandria Italy
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41
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Cakić N, Tickner B, Zaiss M, Esteban-Gómez D, Platas-Iglesias C, Angelovski G. Spectrally Undiscerned Isomers Might Lead to Erroneous Determination of Water Exchange Rates of paraCEST Eu(III) Agents. Inorg Chem 2017. [DOI: 10.1021/acs.inorgchem.7b00441] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nevenka Cakić
- MR
Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, 72076 Tübingen, Germany
| | - Ben Tickner
- MR
Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, 72076 Tübingen, Germany
| | - Moritz Zaiss
- High-Field
Magnetic Resonance, Max Planck Institute for Biological Cybernetics, 72076 Tübingen, Germany
| | - David Esteban-Gómez
- Universidade da Coruña, Centro de Investigacións
Científicas Avanzadas (CICA) and Departamento de Química
Fundamental, Facultade de Ciencias, 15071 A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Investigacións
Científicas Avanzadas (CICA) and Departamento de Química
Fundamental, Facultade de Ciencias, 15071 A Coruña, Galicia, Spain
| | - Goran Angelovski
- MR
Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, 72076 Tübingen, Germany
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42
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Blahut J, Hermann P, Tošner Z, Platas-Iglesias C. A combined NMR and DFT study of conformational dynamics in lanthanide complexes of macrocyclic DOTA-like ligands. Phys Chem Chem Phys 2017; 19:26662-26671. [DOI: 10.1039/c7cp05296k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A NMR study of the conformational dynamics of paramagnetic Eu3+ complexes provides parameters for isomer interconversion with unprecedented accuracy, while DFT reveals mechanistic details at the molecular level.
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Affiliation(s)
- Jan Blahut
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University
- Prague 2
- Czech Republic
| | - Petr Hermann
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University
- Prague 2
- Czech Republic
| | - Zdeněk Tošner
- Faculty of Science
- Charles University
- Prague 2
- Czech Republic
| | - Carlos Platas-Iglesias
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
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43
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Le Fur M, Beyler M, Molnár E, Fougère O, Esteban-Gómez D, Tircsó G, Platas-Iglesias C, Lepareur N, Rousseaux O, Tripier R. The role of the capping bond effect on pyclen natY3+/90Y3+ chelates: full control of the regiospecific N-functionalization makes the difference. Chem Commun (Camb) 2017; 53:9534-9537. [PMID: 28808725 DOI: 10.1039/c7cc05088g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A dissymmetric pyclen based ligand shows astonishing natY3+ and 90Y3+ complexation properties.
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44
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Rodríguez-Rodríguez A, Regueiro-Figueroa M, Esteban-Gómez D, Rodríguez-Blas T, Patinec V, Tripier R, Tircsó G, Carniato F, Botta M, Platas-Iglesias C. Definition of the Labile Capping Bond Effect in Lanthanide Complexes. Chemistry 2016; 23:1110-1117. [DOI: 10.1002/chem.201604390] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Aurora Rodríguez-Rodríguez
- Centro de Investigaciones Científicas Avanzadas (CICA); Departamento de Química Fundamental; Facultade de Ciencias; Universidade da Coruña; 15071 A Coruña Galicia Spain
- Université de Bretagne Occidentale, UMR-CNRS 6521; UFR des Sciences et Techniques; 6 avenue Victor le Gorgeu, C.S. 93837 29238 Brest Cedex 3 France
| | - Martín Regueiro-Figueroa
- Centro de Investigaciones Científicas Avanzadas (CICA); Departamento de Química Fundamental; Facultade de Ciencias; Universidade da Coruña; 15071 A Coruña Galicia Spain
| | - David Esteban-Gómez
- Centro de Investigaciones Científicas Avanzadas (CICA); Departamento de Química Fundamental; Facultade de Ciencias; Universidade da Coruña; 15071 A Coruña Galicia Spain
| | - Teresa Rodríguez-Blas
- Centro de Investigaciones Científicas Avanzadas (CICA); Departamento de Química Fundamental; Facultade de Ciencias; Universidade da Coruña; 15071 A Coruña Galicia Spain
| | - Véronique Patinec
- Université de Bretagne Occidentale, UMR-CNRS 6521; UFR des Sciences et Techniques; 6 avenue Victor le Gorgeu, C.S. 93837 29238 Brest Cedex 3 France
| | - Raphaël Tripier
- Université de Bretagne Occidentale, UMR-CNRS 6521; UFR des Sciences et Techniques; 6 avenue Victor le Gorgeu, C.S. 93837 29238 Brest Cedex 3 France
| | - Gyula Tircsó
- Department of Inorganic and Analytical Chemistry; University of Debrecen; 4010 Debrecen, Egyetem tér 1 Hungary
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica; Università del Piemonte Orientale “A. Avogadro”; Viale T. Michel 11 15121 Alessandria Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica; Università del Piemonte Orientale “A. Avogadro”; Viale T. Michel 11 15121 Alessandria Italy
| | - Carlos Platas-Iglesias
- Centro de Investigaciones Científicas Avanzadas (CICA); Departamento de Química Fundamental; Facultade de Ciencias; Universidade da Coruña; 15071 A Coruña Galicia Spain
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45
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Xing Y, Jindal AK, Regueiro-Figueroa M, Le Fur M, Kervarec N, Zhao P, Kovacs Z, Valencia L, Pérez-Lourido P, Tripier R, Esteban-Gómez D, Platas-Iglesias C, Sherry AD. The Relationship between NMR Chemical Shifts of Thermally Polarized and Hyperpolarized 89 Y Complexes and Their Solution Structures. Chemistry 2016; 22:16657-16667. [PMID: 27723138 DOI: 10.1002/chem.201602901] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Indexed: 01/13/2023]
Abstract
Recently developed dynamic nuclear polarization (DNP) technology offers the potential of increasing the NMR sensitivity of even rare nuclei for biological imaging applications. Hyperpolarized 89 Y is an ideal candidate because of its narrow NMR linewidth, favorable spin quantum number (I=1/2 ), and long longitudinal relaxation times (T1 ). Strong NMR signals were detected in hyperpolarized 89 Y samples of a variety of yttrium complexes. A dataset of 89 Y NMR data composed of 23 complexes with polyaminocarboxylate ligands was obtained using hyperpolarized 89 Y measurements or 1 H,89 Y-HMQC spectroscopy. These data were used to derive an empirical equation that describes the correlation between the 89 Y chemical shift and the chemical structure of the complexes. This empirical correlation serves as a guide for the design of 89 Y sensors. Relativistic (DKH2) DFT calculations were found to predict the experimental 89 Y chemical shifts to a rather good accuracy.
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Affiliation(s)
- Yixun Xing
- Department of Chemistry, University of Texas, Dallas, 800 West Campbell Road, Richardson, Texas, 75080, USA
| | - Ashish K Jindal
- Advanced Imaging Research Center, University of Texas Southwestern Medical Center, 5325 Harry Hines Boulevard, Dallas, Texas, 75390, USA
| | - Martín Regueiro-Figueroa
- Centro de Investigaciones Científicas Avanzadas (CICA) y Departamento de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, 15071, A Coruña, Galicia, Spain
| | - Mariane Le Fur
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238, Brest Cedex 3, France
| | - Nelly Kervarec
- Plateforme de RMN-RPE, Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238, Brest Cedex 3, France
| | - Piyu Zhao
- Department of Chemistry, University of Texas, Dallas, 800 West Campbell Road, Richardson, Texas, 75080, USA
| | - Zoltan Kovacs
- Advanced Imaging Research Center, University of Texas Southwestern Medical Center, 5325 Harry Hines Boulevard, Dallas, Texas, 75390, USA
| | - Laura Valencia
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310, Pontevedra, Spain
| | - Paulo Pérez-Lourido
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310, Pontevedra, Spain
| | - Raphaël Tripier
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238, Brest Cedex 3, France
| | - David Esteban-Gómez
- Centro de Investigaciones Científicas Avanzadas (CICA) y Departamento de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, 15071, A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigaciones Científicas Avanzadas (CICA) y Departamento de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, 15071, A Coruña, Galicia, Spain.
| | - A Dean Sherry
- Department of Chemistry, University of Texas, Dallas, 800 West Campbell Road, Richardson, Texas, 75080, USA. .,Advanced Imaging Research Center, University of Texas Southwestern Medical Center, 5325 Harry Hines Boulevard, Dallas, Texas, 75390, USA.
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46
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Kumas C, Fernando WS, Zhao P, Regueiro-Figueroa M, Kiefer GE, Martins AF, Platas-Iglesias C, Sherry AD. Unexpected Changes in the Population of Coordination Isomers for the Lanthanide Ion Complexes of DOTMA-Tetraglycinate. Inorg Chem 2016; 55:9297-305. [PMID: 27603690 DOI: 10.1021/acs.inorgchem.6b01390] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Lanthanide complexes with DOTA-tetraglycinate (DOTA-(gly)4) heavily favor the square antiprismatic (SAP) coordination isomer in aqueous solution, a structural feature that has made them useful as water-based paraCEST agents. In an effort to create amide-based paraCEST agents with rapid water exchange rates, we prepared the analogous tetraglycinate complexes with DOTMA, a ligand known to favor the twisted square antiprismatic (TSAP) coordination structures. Unexpectedly, NMR investigations show that the LnDOTMA-(gly)4 complexes, like the LnDOTA-(gly)4 complexes, also favor the SAP isomers in solution. This observation led to density functional theory (DFT) calculations in order to identify the energy terms that favor the SAP structures in lanthanide complexes formed with macrocyclic DOTA- and DOTMA-tetraamide ligands. The DFT calculations revealed that, regardless the nature of the ligand, the TSAP isomers present more negative hydration energies than the SAP counterparts. The extent to which the TSAP isomer is stabilized varies, however, depending on the ligand structure, resulting in different isomeric populations in solution.
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Affiliation(s)
- Cemile Kumas
- Department of Chemistry, University of Texas at Dallas , Dallas, Texas 75080, United States
| | - W Shirangi Fernando
- Department of Chemistry, University of Texas at Dallas , Dallas, Texas 75080, United States
| | - Piyu Zhao
- Department of Chemistry, University of Texas at Dallas , Dallas, Texas 75080, United States
| | - Martín Regueiro-Figueroa
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Garry E Kiefer
- Department of Chemistry, University of Texas at Dallas , Dallas, Texas 75080, United States.,Macrocyclics, Inc. , Dallas, Texas 75235, United States
| | - André F Martins
- Department of Chemistry, University of Texas at Dallas , Dallas, Texas 75080, United States
| | - Carlos Platas-Iglesias
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - A Dean Sherry
- Department of Chemistry, University of Texas at Dallas , Dallas, Texas 75080, United States.,Advanced Imaging Research Center, University of Texas Southwestern Medical Center , Dallas, Texas 75390, United States
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47
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Karimi S, Hunter G, Moriggi L, Platas-Iglesias C, Helm L. Complexation of [Gd(DTTA–Me)(H2O)2]− by Fluoride and Its Consequences to Water Exchange. Inorg Chem 2016; 55:6231-9. [DOI: 10.1021/acs.inorgchem.6b00861] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shima Karimi
- Institute
of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Gail Hunter
- Institute
of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Loïck Moriggi
- Institute
of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Carlos Platas-Iglesias
- Centro
de Investigaciones Científicas Avanzadas (CICA) and Departamento
de Química Fundamental, Universidade da Coruña, Campus
da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Lothar Helm
- Institute
of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH, CH-1015 Lausanne, Switzerland
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48
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Karimi S, Helm L. Water Exchange on [Ln(DO3A)(H2O)2] and [Ln(DTTA–Me)(H2O)2]− Studied by Variable Temperature, Pressure, and Magnetic Field NMR. Inorg Chem 2016; 55:4555-63. [DOI: 10.1021/acs.inorgchem.6b00363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shima Karimi
- Laboratoire
de Chimie Inorganique
et Bioinorganique, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Lothar Helm
- Laboratoire
de Chimie Inorganique
et Bioinorganique, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH, CH-1015 Lausanne, Switzerland
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49
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Aravena D, Neese F, Pantazis DA. Improved Segmented All-Electron Relativistically Contracted Basis Sets for the Lanthanides. J Chem Theory Comput 2016; 12:1148-56. [DOI: 10.1021/acs.jctc.5b01048] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Daniel Aravena
- Max Planck Institut für Chemische Energiekonversion, Stifstr. 34-36, 45470 Mülheim an der Ruhr, Germany
- Facultad
de Química y Biología, Universidad de Santiago de Chile (USACH), Casilla 40, Correo 33, Santiago, Chile
| | - Frank Neese
- Max Planck Institut für Chemische Energiekonversion, Stifstr. 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Dimitrios A. Pantazis
- Max Planck Institut für Chemische Energiekonversion, Stifstr. 34-36, 45470 Mülheim an der Ruhr, Germany
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50
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Peters JA. The reliability of parameters obtained by fitting of1H NMRD profiles and17O NMR data of potential Gd3+-based MRI contrast agents. CONTRAST MEDIA & MOLECULAR IMAGING 2015; 11:160-8. [DOI: 10.1002/cmmi.1677] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 11/02/2015] [Accepted: 11/09/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Joop A. Peters
- Department of Biotechnology; Delft University of Technology; Julianalaan 136 2628 BL Delft The Netherlands
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