1
|
Enel M, Leygue N, Balayssac S, Laurent S, Galaup C, Vander Elst L, Picard C. New polyaminocarboxylate macrocycles containing phenolate binding units: synthesis, luminescent and relaxometric properties of their lanthanide complexes. Dalton Trans 2018; 46:4654-4668. [PMID: 28327741 DOI: 10.1039/c7dt00291b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of two new polyaminocarboxylate macrocycles incorporating one or two intracyclic phenol units (H4L1 and H8L2, respectively) is described. The 12-membered H4L1 macrocycle leads to soluble and stable mononuclear LnIII complexes of [(L1)Ln(H2O)2]- composition (Ln = Eu, Tb and Gd) in aqueous solutions. In Tris buffer (pH 7.4), the [(L1)Tb(H2O)2]- complex displays a suitable efficiency for sensitized emission (ηsens = 48%) and a high luminescence quantum yield (Φ = 22%), which is worthy of note for a bis-hydrated terbium complex. Besides, luminescence experiments show that bidentate endogenous anions (citrate, carbonate, and phosphate) do not displace the two inner-sphere water molecules of this complex. In contrast, the possible presence of LMCT states causes the europium complex to be weakly luminescent. The [(L1)Gd(H2O)2]- complex is characterized by high relaxivity (r = 7.2 s-1 mM-1 at 20 MHz) and a very short water residence time of the coordinated water molecules (τ = 9 ns), promising values for the realisation of macromolecular systems with high relaxivities. Thus, the Tb and Gd complexes of the H4L1 macrocycle exhibit several improvements in terms of luminescent (lower excitation energy, higher brightness) and relaxometric (shorter τM) properties compared to the corresponding LnPCTA complexes, where a phenol moiety substitutes a pyridine ring. On the other hand, the 24-membered H8L2 macrocycle including two phenol units in its structure leads to dinuclear complexes of [(L2)Ln2]2- composition. Its terbium complex shows a long luminescence lifetime (2 ms) and a high quantum yield (43%) in aqueous solutions, making this compound a new promising candidate for time-resolved applications.
Collapse
Affiliation(s)
- Morgane Enel
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Nadine Leygue
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Stéphane Balayssac
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Sophie Laurent
- NMR and Molecular Imaging Laboratory, Department of General, Organic and Biomedical Chemistry, University of Mons, 23 Place du Parc, B-7000 Mons, Belgium. and Center for Microscopy and Molecular Imaging (CMMI), Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | - Chantal Galaup
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| | - Luce Vander Elst
- NMR and Molecular Imaging Laboratory, Department of General, Organic and Biomedical Chemistry, University of Mons, 23 Place du Parc, B-7000 Mons, Belgium. and Center for Microscopy and Molecular Imaging (CMMI), Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | - Claude Picard
- CNRS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, UMR-5068, 118 Route de Narbonne, F-31062 Toulouse cedex 9, France. and Université de Toulouse, UPS, Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique, SPCMIB, 118 route de Narbonne, F-31062 Toulouse cedex 9, France
| |
Collapse
|
2
|
Mendonça AC, Martins AF, Melchior A, Marques SM, Chaves S, Villette S, Petoud S, Zanonato PL, Tolazzi M, Bonnet CS, Tóth É, Di Bernardo P, Geraldes CFGC, Santos MA. New tris-3,4-HOPO lanthanide complexes as potential imaging probes: complex stability and magnetic properties. Dalton Trans 2013; 42:6046-57. [DOI: 10.1039/c2dt32237d] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
3
|
Ferreira MF, Martins AF, Martins CIO, Ferreira PM, Tóth É, Rodrigues TB, Calle D, Cerdan S, López-Larrubia P, Martins JA, Geraldes CFGC. Amide conjugates of the DO3A-N-(α-amino)propionate ligand: leads for stable, high relaxivity contrast agents for MRI? CONTRAST MEDIA & MOLECULAR IMAGING 2012; 8:40-9. [DOI: 10.1002/cmmi.1492] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Miguel F. Ferreira
- Centro de Química, Campus de Gualtar; Universidade do Minho; 4710-057 Braga Portugal
| | - André F. Martins
- Center of Neurosciences and Cell Biology; University of Coimbra; Largo Marquês de Pombal Coimbra Portugal
- Centre de Biophysique Moléculaire UPR 4301, CNRS; Rue Charles Sadron 45071 Orléans France
| | - Catarina I. O. Martins
- Center of Neurosciences and Cell Biology; University of Coimbra; Largo Marquês de Pombal Coimbra Portugal
| | - Paula M. Ferreira
- Centro de Química, Campus de Gualtar; Universidade do Minho; 4710-057 Braga Portugal
| | - Éva Tóth
- Centre de Biophysique Moléculaire UPR 4301, CNRS; Rue Charles Sadron 45071 Orléans France
| | - Tiago B. Rodrigues
- Cancer Research UK; Cambridge Research Institute, Li Ka Shing Centre; Cambridge CB2 0RE UK
- Department of Biochemistry; University of Cambridge; Cambridge CB2 1GA UK
| | - Daniel Calle
- Instituto de Investigaciones Biomédicas ‘Alberto Sols’, CSIC-UAM; Madrid Spain
| | - Sebastian Cerdan
- Instituto de Investigaciones Biomédicas ‘Alberto Sols’, CSIC-UAM; Madrid Spain
| | | | - José A. Martins
- Centro de Química, Campus de Gualtar; Universidade do Minho; 4710-057 Braga Portugal
| | - Carlos F. G. C. Geraldes
- Center of Neurosciences and Cell Biology; University of Coimbra; Largo Marquês de Pombal Coimbra Portugal
- Department of Life Sciences, Faculty of Science and Technology; University of Coimbra; P.O. Box 3046 3001-401 Coimbra Portugal
- Centro de Química de Coimbra, Rua Larga; University of Coimbra; 3004-535 Coimbra Portugal
| |
Collapse
|
4
|
Silvério S, Torres S, Martins AF, Martins JA, André JP, Helm L, Prata MIM, Santos AC, Geraldes CFGC. Lanthanide chelates of (bis)-hydroxymethyl-substituted DTTA with potential application as contrast agents in magnetic resonance imaging. Dalton Trans 2009:4656-70. [DOI: 10.1039/b823402g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
5
|
Moriggi L, Cannizzo C, Prestinari C, Berrière F, Helm L. Physicochemical Properties of the High-Field MRI-Relevant [Gd(DTTA-Me)(H2O)2]− Complex. Inorg Chem 2008; 47:8357-66. [DOI: 10.1021/ic800512k] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Loïck Moriggi
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des sciences et ingénierie chimiques, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Caroline Cannizzo
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des sciences et ingénierie chimiques, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Cora Prestinari
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des sciences et ingénierie chimiques, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Florent Berrière
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des sciences et ingénierie chimiques, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Lothar Helm
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des sciences et ingénierie chimiques, EPFL-BCH, CH-1015 Lausanne, Switzerland
| |
Collapse
|
6
|
Conway JCD, Liparini A, de Oliveira JR, Belchior JC. Analyses of the temperature and pH effects on the complexation of magnesium and calcium in human blood plasma: an approach using artificial neural networks. Anal Bioanal Chem 2007; 389:1585-94. [PMID: 17874236 DOI: 10.1007/s00216-007-1544-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2007] [Revised: 07/28/2007] [Accepted: 08/02/2007] [Indexed: 11/27/2022]
Abstract
The temperature and pH effects on the equilibrium of a blood plasma model have been studied on the basis of artificial neural networks. The proposed blood plasma was modeled considering two important metals, calcium and magnesium, and six ligands, namely, alanate, carbonate, citrate, glycinate, histidinate and succinate. A large data set has been used to simulate different concentrations of magnesium and calcium as a function of temperature and pH and these data were used for training the neural network. The proposed model allowed different types of analyses, such as the effects of pH on calcium and magnesium concentrations, the competition between calcium and magnesium for ligands and the effects of temperature on calcium and magnesium concentrations. The model developed was also used to predict how the variation of calcium concentration can affect magnesium concentrations. A comparison of neural network predictions against experimental data produced errors of about 3%. Moreover, in agreement with experimental measurements (Wang et al. in Arch. Pathol. 126:947-950, 2002; Heining et al. in Scand. J. Clin. Lab. Invest. 43:709-714, 1983), the artificial neural network predicted that calcium and magnesium concentrations decrease when pH increases. Similarly, the magnesium concentrations are less sensitive than calcium concentrations to pH changes. It is also found that both calcium and magnesium concentrations decrease when the temperature increases. Finally, the theoretical model also predicted that an increase of calcium concentrations will lead to an increase of magnesium concentration almost at the same rate. These results suggest that artificial neural networks can be efficiently applied as a complementary tool for studying metal ion complexation, with especial attention to the blood plasma analysis.
Collapse
Affiliation(s)
- J C D Conway
- Departamento de Química - ICEx, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, Minas Gerais, Brazil
| | | | | | | |
Collapse
|