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Luo S, Shen X, Gao P, Tu T, Sun X. Magneto-structural maps and bridged-ligand effect for dichloro-bridged dinuclear copper(ii) complexes: a theoretical perspective. RSC Adv 2023; 13:12430-12437. [PMID: 37091610 PMCID: PMC10116190 DOI: 10.1039/d3ra00585b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 04/17/2023] [Indexed: 04/25/2023] Open
Abstract
Theoretical understanding of magneto-structural correlations in dichloro-bridged dicopper(ii) complexes can guide the design of magnetic materials having broad-scale applications. However, previous reports suggest these correlations are complicated and unclear. To clarify possible correlations, magnetic coupling constants (J calc) of variants of a representative {Cu-(μ-Cl)2-Cu} complex A were calculated through BS-DFT. The variation of the Cu-(μ-Cl)-Cu angle (α), Cu⋯Cu distance (R 0), and Cu-Cl-Cu-Cl dihedral angle (τ) followed by structural optimization and calculation of the magnetic coupling constant (J calc) revealed several trends. J calc increased linearly with R 0 and τ, and initially increased and then decreased with α. Further, bridging ligand effects on J calc for dicopper(ii) complexes were evaluated through BS-DFT; the results revealed that J calc increased with increasing ligand field strength (I- < Br- < Cl- < N3 - < F-). Furthermore, a linear relationship was found between the spin density of the bridging ligand and J calc.
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Affiliation(s)
- Shuchang Luo
- College of Chemical Engineering, Guizhou University of Engineering Science Bijie 551700 People's Republic of China
- The Coal Chemical Engineering, 2011 Collaborative Innovation Center of Guizhou Province Bijie 551700 People's Republic of China
- Guizhou Province Key Laboratory of Ecological Protection and Restoration of Typical Plateau Wetlands Bijie 551700 People's Republic of China
| | - Xianwei Shen
- College of Chemical Engineering, Guizhou University of Engineering Science Bijie 551700 People's Republic of China
- The Coal Chemical Engineering, 2011 Collaborative Innovation Center of Guizhou Province Bijie 551700 People's Republic of China
| | - Peng Gao
- College of Chemical Engineering, Guizhou University of Engineering Science Bijie 551700 People's Republic of China
- The Coal Chemical Engineering, 2011 Collaborative Innovation Center of Guizhou Province Bijie 551700 People's Republic of China
| | - Ting Tu
- College of Chemical Engineering, Guizhou University of Engineering Science Bijie 551700 People's Republic of China
- The Coal Chemical Engineering, 2011 Collaborative Innovation Center of Guizhou Province Bijie 551700 People's Republic of China
| | - Xiaoyuan Sun
- College of Chemical Engineering, Guizhou University of Engineering Science Bijie 551700 People's Republic of China
- The Coal Chemical Engineering, 2011 Collaborative Innovation Center of Guizhou Province Bijie 551700 People's Republic of China
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1,3-Bis(1-methyl-1H-tetrazol-5-yl)propane and its coordination polymers with Cu2Cl4 and Cu3Cl6 units. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114793] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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3
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Homo and hetero-bridged dinuclear copper(II) complex: Synthesis, X-ray structure and catalytic N-arylation. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.114127] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Guillou A, Lima LMP, Esteban-Gómez D, Delgado R, Platas-Iglesias C, Patinec V, Tripier R. endo- versus exo-Cyclic coordination in copper complexes with methylthiazolylcarboxylate tacn derivatives. Dalton Trans 2019; 48:8740-8755. [PMID: 31143891 DOI: 10.1039/c9dt01366k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Three tacn (1,4,7-triazacyclononane)-based ligands substituted by methylthiazolylcarboxylate (tha) and/or methylthiazolyl (th) arms have been examined for copper complexation with the aim to study the impact of carboxylate groups on the complexation of Cu(ii), which can present an endo- or exo-cyclic coordination. Two new ligands have been synthesised: H3no3tha, tacn bearing three methylthiazolylcarboxylate arms, and H2no1th2tha, tacn with one methylthiazolyl and two methylthiazolylcarboxylate arms, while Hno2th1tha had already been described. Their complexation behaviour with 1 or 1.5 equivalents of metal was studied on the basis of preliminary results showing the tendency of tha arms to form exocyclic polynuclear species. The solid state studies of the Cu(ii) and Zn(ii) complexes were investigated and some of their structures were characterised by X-ray diffraction. The physicochemical properties of the complexes in solution were also investigated by means of potentiometric measurements, UV-vis spectroscopy, EPR and computational studies, NMR characterisation of the corresponding Zn(ii) complexes and redox behaviour by electrochemistry. Mono- and tri-nuclear complexes ML and M3L2 were formed and isolated, highlighting the tendency of methylthiazolylcarboxylate arms, when carried by a tacn platform, to form exo-cyclic and polynuclear complexes. However, this exhaustive study evidences that the "out of cage" and "in cage" present different behaviour in terms of stability.
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Affiliation(s)
- Amaury Guillou
- 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.
| | - Luís M P Lima
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - David Esteban-Gómez
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain
| | - Rita Delgado
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, 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.
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Méndez-Arriaga JM, Oyarzabal I, Martín-Montes Á, García-Rodríguez J, Quirós M, Sánchez-Moreno M. First Example of Antiparasitic Activity Influenced by Thermochromism: Leishmanicidal Evaluation of 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine Metal Complexes. Med Chem 2019; 16:422-430. [PMID: 30931864 DOI: 10.2174/1573406415666190401120607] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 01/31/2019] [Accepted: 03/07/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND The World Health Organization catalogues illnesses such as Leishmaniasis as neglected diseases, due to low investment in new drugs to fight them. The search of novel and non-side effects anti-parasitic compounds is one of the urgent needs for the Third World. The use of triazolopyrimidines and their metallic complexes has demonstrated hopeful results in this field. OBJECTIVE This work studies the antiparasitic efficacy of a series of 5,7-dimethyl-1,2,4- triazolo[1,5-a]pyrimidine first row transition metal complexes against three leishmania spp. strains. METHODS The in vitro antiproliferation of promastigote forms of different strains of leishmania spp. (L. infantum, L. braziliensis and L donovani) and the cytotoxicity in macrophage host cells are reported here. The antiparasitic assays have been complemented with enzymatic tests to elucidate the mechanisms of action. New crystal structure description, thermal analysis, magnetic susceptibility and magnetization experiments have also been carried out in order to present a whole characterization of the studied compounds and interesting physical properties besides the biological tests. RESULTS The results of antiproliferation screening and cytotoxicity show great antiparasitic efficacy in the studied complexes. The superoxide dismutase enzymatic assays exhibit a different behaviour according to the thermochromic triazolopyrimidine form tested. CONCLUSION Antiproliferative assays and enzymatic tests corroborate the synergetic leishmanicidal effect present in coordination triazolopyrimidine complexes. The changes in coordination sphere derived from thermochromism affect the physical properties as well as the biological efficacy.
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Affiliation(s)
- José M Méndez-Arriaga
- Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda. Fuentenueva, 18071 Granada, Spain.,Department of Parasitology, Faculty of Sciences, University of Granada Avda. Fuentenueva, 18071 Granada, Spain
| | - Itziar Oyarzabal
- CNRS, CRPP, UMR 5031, 33600 Pessac, France.,University of Bordeaux, CRPP, UMR 5031, 33600 Pessac, France
| | - Álvaro Martín-Montes
- Department of Parasitology, Faculty of Sciences, University of Granada Avda. Fuentenueva, 18071 Granada, Spain
| | - Judith García-Rodríguez
- Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda. Fuentenueva, 18071 Granada, Spain
| | - Miguel Quirós
- Department of Inorganic Chemistry, Faculty of Sciences, University of Granada, Avda. Fuentenueva, 18071 Granada, Spain
| | - Manuel Sánchez-Moreno
- Department of Parasitology, Faculty of Sciences, University of Granada Avda. Fuentenueva, 18071 Granada, Spain
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Guillou A, Lima LMP, Esteban-Gómez D, Le Poul N, Bartholomä MD, Platas-Iglesias C, Delgado R, Patinec V, Tripier R. Methylthiazolyl Tacn Ligands for Copper Complexation and Their Bifunctional Chelating Agent Derivatives for Bioconjugation and Copper-64 Radiolabeling: An Example with Bombesin. Inorg Chem 2019; 58:2669-2685. [PMID: 30689368 DOI: 10.1021/acs.inorgchem.8b03280] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present here the synthesis of two new bifunctionalized azachelators, no2th-EtBzNCS and Hno2th1tha, as bioconjugable analogues of two previously described di- and trimethylthiazolyl 1,4,7-triazacyclononane (tacn) ligands, no2th and no3th, for potential uses in copper-64 (64Cu) positron emission tomography imaging. The first one bears an isothiocyanate group on the remaining free nitrogen atom of the tacn framework, while the second one presents an additional carboxylic function on one of the three heterocyclic pendants. Their syntheses required regiospecific N-functionalization of the macrocycles. In order to investigate their suitability for in vivo applications, a complete study of their copper(II) chelation was performed. The acid-base properties of the ligands and their thermodynamic stability constants with copper(II) and zinc(II) cations were determined using potentiometric techniques. Structural studies were conducted in both solution and the solid state, consolidated by theoretical calculations. The kinetic inertness in an acidic medium of both copper(II) complexes was determined by spectrophotometry, while cyclic voltammetry experiments were performed to evaluate the stability at the copper(I) redox state. UV-vis, NMR (of the zinc complexes), electron paramagnetic resonance spectroscopy, and density functional theory studies showed excellent agreement between the solution structures of the complexes and their crystallographic data. These investigations unambiguously prove that these bifunctional derivatives display similar coordination properties as their no2th and no3th counterparts, opening the door to targeted bioapplications. The no2th-EtBzNCS and Hno2th1tha ligands were then conjugated to a bombesin antagonist peptide for targeting the gastrin-releasing peptide receptor (GRPr). To highlight the potential of the two chelators for radiopharmaceutical development, the 64Cu-radiolabeling properties, in vitro stability, and binding affinity to GRPr of the corresponding bioconjugates were determined. Altogether, the results of this work warrant the further development of 64Cu-based radiopharmaceuticals comprising our novel bifunctional chelators.
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Affiliation(s)
- Amaury Guillou
- UFR des Sciences et Techniques , UMR-CNRS 6521, Université de Bretagne Occidentale , 6 avenue Victor le Gorgeu, C.S. 93837 , 29238 Brest Cedex 3 , France
| | - Luís M P Lima
- Instituto de Tecnologia Química e Biológica António Xavier , Universidade Nova de Lisboa , Avenida da República , 2780-157 Oeiras , Portugal
| | - David Esteban-Gómez
- Departamento de Química, Facultade de Ciencias & Centro de Investigaciones Científicas Avanzadas , Universidade da Coruña , 15071 A Coruña , Spain
| | - Nicolas Le Poul
- UFR des Sciences et Techniques , UMR-CNRS 6521, Université de Bretagne Occidentale , 6 avenue Victor le Gorgeu, C.S. 93837 , 29238 Brest Cedex 3 , France
| | - Mark D Bartholomä
- Department of Nuclear Medicine , Saarland University-Medical Center , Kirrbergerstrasse , 66421 Homburg , Germany
| | - Carlos Platas-Iglesias
- Departamento de Química, Facultade de Ciencias & Centro de Investigaciones Científicas Avanzadas , Universidade da Coruña , 15071 A Coruña , Spain
| | - Rita Delgado
- Instituto de Tecnologia Química e Biológica António Xavier , Universidade Nova de Lisboa , Avenida da República , 2780-157 Oeiras , Portugal
| | - Véronique Patinec
- UFR des Sciences et Techniques , UMR-CNRS 6521, Université de Bretagne Occidentale , 6 avenue Victor le Gorgeu, C.S. 93837 , 29238 Brest Cedex 3 , France
| | - Raphaël Tripier
- UFR des Sciences et Techniques , UMR-CNRS 6521, Université de Bretagne Occidentale , 6 avenue Victor le Gorgeu, C.S. 93837 , 29238 Brest Cedex 3 , France
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Voitekhovich SV, Mosalkova AP, Lyakhov AS, Ivashkevich LS, Schmorl S, Kersting B, Ivashkevich OA. Selective Synthesis and Complexation of Novel N
, N
′-Alkylene-Bridged Bis(5-pyridyltetrazole). Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800242] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sergei V. Voitekhovich
- Research Institute for Physical Chemical Problems; Belarusian State University; Leningradskaya Street 14 220006 Minsk Belarus
| | - Anastasiya P. Mosalkova
- Research Institute for Physical Chemical Problems; Belarusian State University; Leningradskaya Street 14 220006 Minsk Belarus
| | - Alexander S. Lyakhov
- Research Institute for Physical Chemical Problems; Belarusian State University; Leningradskaya Street 14 220006 Minsk Belarus
| | - Ludmila S. Ivashkevich
- Research Institute for Physical Chemical Problems; Belarusian State University; Leningradskaya Street 14 220006 Minsk Belarus
| | - Sara Schmorl
- Institute of Inorganic Chemistry; University of Leipzig; Johannisallee 29 04103 Leipzig Germany
| | - Berthold Kersting
- Institute of Inorganic Chemistry; University of Leipzig; Johannisallee 29 04103 Leipzig Germany
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Grigorieva IM, Serebryanskaya TV, Grigoriev YV, Lyakhov AS, Ivashkevich LS, Bogomyakov AS, Lavrenova LG, Voitekhovich SV, Ivashkevich OA. Transition metal chelate complexes with tetrazole derived Mannich base: Metal dependent architecture and properties. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.05.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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