Synthesis, Structure, and Magnetic Properties of a Mononuclear Chiral (Acetato)bis(aminoalkoxido)manganese(III) Complex

Kornowicz, Arkadiusz; Terlecki, Michał; Prochowicz, Daniel; Justyniak, Iwona; Bury, Wojciech; Wróbel, Zbigniew; Sutter, Jean‐Pascal; Lewiński, Janusz

doi:10.1002/ejic.201700084

Cited by 4 publications

(4 citation statements)

References 40 publications

(20 reference statements)

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“…The Mn28 and Zn49 centers deviate 0.159 and 0.180 Å from their respective square planes. The Mn−O/Mn−N and Zn−O/Zn−N bond distances around the respective metal center are comparable to the similar square pyramidal manganese(II) and zinc(II) complexes [69,70] . As observed in 1 , the Mn−O axial water and Zn−O axial water bond distances are considerably greater than the Mn‐O equatorial water and Zn‐O equatorial water bond distances, respectively [2.318 Å vs .…”

Section: Resultssupporting

confidence: 58%

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Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

et al. 2022

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Anthracene-affixed carboxylate-rich tridentate ligand containing three new mononuclear complexes, [Cu(acpa)(H 2 O) 2 ]⋅H 2 O (1), [Mn(acpa)(H 2 O) 2 ] (2) and [Zn(acpa)(H 2 O) 2 ] (3) (H 2 acpa = 3-(anthracene-9-ylmethyl-carboxymethyl-amino)-propionic acid), have been synthesized and characterized by various analytical and spectral methods. In methanol, complexes 1-3 have been prepared by carrying out reaction of the ligand H 2 acpa with stoichiometric amounts of CuSO 4 ⋅ 5H 2 O, MnSO 4 ⋅H 2 O and ZnSO 4 ⋅ 7H 2 O respectively, in the presence of NaOH at ambient temperature. The X-ray crystal structure analysis reveals that complex 1 consists of a distorted square pyramidal copper center, coordinated to one acpa 2À ligand in a tridentate manner (N,O,O) and two exogenous water molecules. On the other hand, the molecular structures of complexes 2 and 3, optimized by DFT method indicate that their core arrangements around the metal centers are similar to that of 1. In solution, the coordination phenomena of Cu((II), Mn(II) and Zn(II) ions with the ligand H 2 acpa and the structural features of the complexes have been authenticated by UV-Vis and fluorescence titration experiments. The composition of the M II /acpa 2À complexes (M = Cu, Mn, Zn) in 1-3 has been observed to be 1 : 1, based on the UV-Vis/fluorescence titration results which are further supported by X-ray crystallography and DFT calculation. Complexes 1-3 are investigated for their binding affinity towards Calf Thymus (CT) DNA in solution at pH ∼ 7.5 by UV-Vis and fluorescence spectroscopic methods. From the electronic absorption spectral studies, it has been found that the DNA binding constants of 1-3 are (5.67 � 0.32) × 10 4 M À 1 , (2.35 � 0.26) × 10 4 M À 1 and (2.49 � 0.33) × 10 4 M À 1 , respectively, following the order 1 > 3 > 2. Measurements of viscosity of DNA in the absence and presence of the metal complexes suggest that all three complexes interact with DNA through partial intercalative mode.

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Section: Resultssupporting

confidence: 58%

“…As indicated by the values of τ (Mn28, 0.040 in 2; Zn49, 0.320 in 3), [63] the manganese and zinc centers reveal ChemistrySelect zinc(II) complexes. [69,70]…”

Section: Dft Optimized Structures Of Complexes 2 Andmentioning

confidence: 99%

Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

et al. 2022

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“…Thus, in the next step, we turned our attention to transmetalation reactions utilizing potassium salts of ligand ( pyret-K), which, in our previous works, proved to be an effective strategy to introduce various anionic organic ligands to transition metal coordination compounds. 68,75,76 This approach paved the way for the efficient synthesis of new heteroleptic hydroxido-acetato and hexameric acetato clusters 1 and 2, respectively. Further experiments revealed an interesting predisposition of both compounds to the formation of a stoichiometric co-crystal 1•2.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, polymorphism, and shape complementarity-induced co-crystallization of hexanuclear Co(ii) clusters capped by a flexible heteroligand shell

Terlecki,

Kornowicz,

Sacharczuk

et al. 2024

Dalton Trans.

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“…As part of our continuing research on the design and synthesis of functional materials based on CD building units 5 , 6 and homo- and heterometallic clusters incorporating magnetically active metal ions 7 herein, we demonstrate how the type of CD ligand influences the formation, self-organization, and magnetic properties of Co/Li sandwich-type complexes. To this effect, we have isolated and structurally characterized a new sandwich-type complex, [(α-CD) 2 Co 3 Li 6 (H 2 O) 9 ], which represents a smaller macrocycle analogue of the [(γ-CD) 2 Co 4 Li 8 (H 2 O) 12 ] cluster.…”

Section: Introductionmentioning

confidence: 83%

Cyclodextrin-Templated Co(II) Grids: Symmetry Control over Supramolecular Topology and Magnetic Properties

et al. 2022

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While inherent complexation properties and propensity for self-organization of cyclodextrins (CDs) render them potentially promising scaffolds of magnetic materials, this research area is still at an embryonic stage. We report on the synthesis and structure characterization of a new sandwich-type complex, [(α-CD) 2 Co 3 Li 6 (H 2 O) 9 ] ( α-1 ), which represents a smaller analogue of the previously characterized [(γ-CD) 2 Co 4 Li 8 (H 2 O) 12 ] ( γ-1 ) cluster. A comprehensive structural analysis of α-1 and a careful reinvestigation of γ-1 reveal how the symmetry of CD ligands determines the molecular composition and supramolecular arrangements of Co/Li sandwich-type complexes. Furthermore, the first comparative studies of the magnetic properties in this type of system point to subtle differences in the magnetic behavior of both compounds. The sandwich-type complexes α-1 and γ-1 exhibit field-induced slow magnetic relaxation, defining a new family of magnetic materials with a pillared grid-like supramolecular structure composed of weakly interacting Co II centers forming an SMM.

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Synthesis, Structure, and Magnetic Properties of a Mononuclear Chiral (Acetato)bis(aminoalkoxido)manganese(III) Complex

Abstract: A new synthetic procedure was developed to obtain a novel mononuclear chiral square-pyramidal (acetato)bis-(aminoalkoxido)Mn III complex from a heterometallic Zn II /Mn II system with a crucial role for O 2 in the process. The resulting [a]

Cited by 4 publications

References 40 publications

Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

Cu(II), Mn(II) and Zn(II) Complexes of Anthracene‐Affixed Carboxylate‐Rich Tridentate Ligand: Synthesis, Structure, Spectroscopic Investigation and Their DNA Binding Profile

Synthesis, polymorphism, and shape complementarity-induced co-crystallization of hexanuclear Co(ii) clusters capped by a flexible heteroligand shell

Cyclodextrin-Templated Co(II) Grids: Symmetry Control over Supramolecular Topology and Magnetic Properties

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