Synthesis, characterization and structure of transition metal complexes of 4′-methylthio-2,2′:6′,2″-terpyridyl

Jeitler, James R.; Turnbull, Mark M.; Wikaira, Jan L.

doi:10.1016/s0020-1693(03)00175-0

Cited by 31 publications

(19 citation statements)

References 49 publications

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“…This type of geometry is that usually reported for related Zn(II) compounds, e.g. [Zn(4′-MeSterpy)Cl 2 ] (4′-MeSterpy = 4′-methylthio-2,2′:6′,2″-terpyridyl) [49]. In compound 2 the structure could also be envisaged as a highly distorted octahedron if one would consider the coordination of the second nitrate, by means of its O5 oxygen atom; if so, N1, N2, N3 and O7 would occupy the equatorial plane and O1 and O5 the apical positions.…”

Section: Resultssupporting

confidence: 73%

Synthesis, characterization, solid-state photo-luminescence and anti-tumor activity of zinc(II) 4′-phenyl-terpyridine compounds

Cao

Liu

et al. 2010

Journal of Inorganic Biochemistry

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Section: Resultssupporting

confidence: 73%

Synthesis, characterization, solid-state photo-luminescence and anti-tumor activity of zinc(II) 4′-phenyl-terpyridine compounds

Cao

Liu

et al. 2010

Journal of Inorganic Biochemistry

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“…Therefore, mono-and disubstituted metal complexes of diamagnetic first-row transition metals can be distinguished by 1 H NMR spctroscopy. [27] The measured data clearly prove formation of homoleptic bis-tpy complexes with Zn II , Ru II , and Fe II . The observed shifts increase from Zn II to Ru II to Fe II , which is very likely a result of the different bond lengths.…”

mentioning

confidence: 66%

“…The observed shifts increase from Zn II to Ru II to Fe II , which is very likely a result of the different bond lengths. The average metal-nitrogen bond length in M II A C H T U N G T R E N N U N G (tpy 2 ) complexes decreases from Zn II to Ru II to Fe II , [24,27,28] and this leads to a stronger shielding effect. In (19).…”

mentioning

confidence: 99%

Self‐Assembly of Supramolecular Architectures and Polymers by Orthogonal Metal Complexation and Hydrogen‐Bonding Motifs

Grimm

Ulm

Gröhn

et al. 2011

Chemistry A European J

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A modular construction kit with two orthogonal noncovalent binding sites for self-assembly of supramolecular architectures is presented. The heteroditopic building blocks contain a terpyridine (tpy) unit for coordination of metal ions and a Hamilton receptor for multiple H-bonding of cyanuric acid derivatives. The association constants of ligand binding of M(II) complexes (M=Ru, Zn, Fe, and Pt) with a dendritic end cap were determined to be in the range of 10(2) and 10(4) L mol(-1) in chloroform. The capabilities for binding of metal ions were investigated by (1)H NMR and UV/Vis spectroscopy. The Fe complexes are most appropriate for the generation of discrete and high-ordered architectures due to their strong tendency to form FeL(2) complexes. Superstructures are readily formed in a one-pot procedure at room temperature. No mutual interactions between the orthogonal binding motifs were observed, and this demonstrates the highly specific nature of each binding process. Decomplexation experiments were carried out to examine the reversibility of Fe-tpy coordination. Substitution of the terminal end cap with a homoditopic bis-cyanurate linkage leads to formation of an iron-containing supramolecular strand. Formation of coordination polymers was confirmed by viscosity measurements. The supramolecular polymer strands can be reversibly cleaved by addition of a terminating cyanuric acid building block, and this proves the dynamic nature of this noncovalent polymerization process.

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“…Although square-planar geometry (Figure 7B) is sterically less congested, it is not typical for four-coordinate zinc(II) complexes, which tend to adopt a tetrahedral structure. [32] The trigonal bipyramidal configuration ( Figure 7C) was reported for five-coordinate zinc(II)-terpy complexes, [41] and it seems to be optimal for columnar stack-bending due to steric and coordination chemistry factors.…”

Section: Self-assembly Studiesmentioning

confidence: 80%

“…This appears to be a consequence of the differences between the ML 5 [41] Thus, the preference for the trigonal bipyramidal configuration in the case of zinc complex 2 favors bridging ligand motif, resulting in nanospirals that are stable for months; however, such a motif is less stable for cobalt(II), leading to lower stability of the bent arrays.…”

Section: Self-assembly Studiesmentioning

confidence: 99%

Bending Nanofibers into Nanospirals: Coordination Chemistry as a Tool for Shaping Hydrophobic Assemblies

Kossoy

Weissman

Rybtchinski

2014

Chemistry A European J

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In the current work, we demonstrate how coordination chemistry can be employed to direct self-assembly based on strong hydrophobic interactions. To investigate the influence of coordination sphere geometry on aqueous self-assembly, we synthesized complexes of the amphiphilic perylene diimide terpyridine ligand with the first-row transition-metal centers (zinc, cobalt, and nickel). In aqueous medium, aggregation of these complexes is induced by hydrophobic interactions between the ligands. However, the final shapes of the resulting assemblies depend on the preferred geometry of the coordination spheres typical for the particular metal center. The self-assembly process was characterized by UV/Vis spectroscopy, zeta potential measurements, and cryogenic transmission electron microscopy (cryo-TEM). Coordination of zinc(II) and cobalt(II) leads to the formation of unique nanospiral assemblies, whereas complexation of nickel(II) leads to the formation of straight nanofibers. Notably, coordination bonds are utilized not as connectors between elementary building blocks, but as directing interactions, enabling control over supramolecular geometry.

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Synthesis, characterization and structure of transition metal complexes of 4′-methylthio-2,2′:6′,2″-terpyridyl

Cited by 31 publications

References 49 publications

Synthesis, characterization, solid-state photo-luminescence and anti-tumor activity of zinc(II) 4′-phenyl-terpyridine compounds

Synthesis, characterization, solid-state photo-luminescence and anti-tumor activity of zinc(II) 4′-phenyl-terpyridine compounds

Self‐Assembly of Supramolecular Architectures and Polymers by Orthogonal Metal Complexation and Hydrogen‐Bonding Motifs

Bending Nanofibers into Nanospirals: Coordination Chemistry as a Tool for Shaping Hydrophobic Assemblies

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