Sodium and Potassium Ion Directed Self-Assembled Multinuclear Assembly of Divalent Nickel or Copper and<scp>l</scp>-Leucine Derived Ligand

Dubey, Mrigendra; Koner, Rik Rani; Ray, Manabendra

doi:10.1021/ic9011444

Cited by 35 publications

(26 citation statements)

References 69 publications

(27 reference statements)

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“…1). An extended literature survey reveals only three previously reported complexes with Ni 3 Na core topologies, each of which are synthesised from similar Schiff base ligands and coordination pockets to H 2 L1 [93,94]. The most recently reported of these Zhang et al [93] shares the same 3M4-1 topology as 1, making 1 the second example of a Ni 3 II /Na I cubane.…”

Section: Resultsmentioning

confidence: 99%

Topological insights in polynuclear Ni/Na coordination clusters derived from a schiff base ligand

2016

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Section: Resultsmentioning

confidence: 99%

Topological insights in polynuclear Ni/Na coordination clusters derived from a schiff base ligand

2016

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“…In the case of triple systems {Ni(acac) 2 + His + Tyr} we also observed growth of self-assembly of supramolecular macrostructures due to intermolecular (phenol-carboxylate) H-bonds and, possible, the other non-covalent interactions [18][19][20][21][22] (fig. 9(a)).…”

Section: Nimentioning

confidence: 99%

Metal and Ligand Control on Structure and Functions of Ni(Fe)ARD: Role of Supramolecular Structures

Matienko¹,

Mosolova²,

Binyukov³

et al. 2017

JPP

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Role of Ni(Fe)-macrostructures due to H-bonds in mechanisms of Ni(Fe)ARD action in methionine salvage pathway is discussed. The AFM method was used to research the possibility of the formation of stable supramolecular nanostructures based on Ni(Fe)ARD model systems {Ni(acac) 2 + L 2 + Tyr} (L 2 = NMP (NMP = N-Methyl-2-pirrolidone), His (His = L-Histidine), Tyr (Tyr = L-Tyrosine)-with the assistance of intermolecular H-bonds. In the course of scanning of investigated samples, it has been found that the structures based on model systems are fixed on a surface strongly enough due to H-bonding. The self-assembly-driven growth of the supramolecular structures on modified Silicone surface based on researched complexes, due to H-bonds and perhaps the other non-covalent interactions was observed.

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“…From a practical point of view, recovery of the recognised guest would be useful. Taking cues from the ability of metal-bound carboxylates to bind alkali metal ions, [19] we employed a metathesis reaction with a potassium salt (Scheme 2). Isolation and structural characterisation of 4 from 2 (70 % yield) shows the replacement of the chiral ammonium cation with K + in the cavity.…”

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confidence: 99%

Three Point Chiral Recognition and Resolution of Amino Alcohols Through Well‐Defined Interaction Inside a Metallocavity

Sahoo¹,

Ray²

2010

Chemistry A European J

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Recognition and separation of one enantiomer over its mirror image is important because of the different biochemical activity shown by chiral compounds.[1] For example, a-limonene and linalool have a different smell [2] depending on the chirality and one enantiomer of the antidepressant drug methylphenidate is 13 times more potent [3] than its isomer. Ideally, recognition of an enantiomer requires recognition of three out of four different groups around an sp 3 -hybridised carbon centre.[4] Recognition of the groups in biological receptors often uses non-covalent interactions as observed in the case of adrenaline receptors. [5,6] The involvement of hydrogen bonds and other weak interactions in the recognition process has the advantage of easy recovery of the guest, but the lability of the guest makes the isolation of the hostguest complex more difficult.Recognition and separation of enantiomers by using synthesised hosts has been approached from diverse angles, [7] including a few that use a rigid metal-organic framework [8] (MOF). Although separation by using a chiral adsorbent as the stationary phase has progressed substantially, [7b-d] the understanding of recognition at the molecular level is limited to molecular modelling due to the difficulty in structural characterisation of large organic or MOF hosts.[1, 9-10] For example, Kim and co-workers used structurally characterised porous channels of a chiral metal complex as a host to enhance the stereoselectivity of an organic reaction, but structural characterisation with the adduct was not possible. [9] A low molecular weight rigid host would, in principle, facilitate structural characterisation, but it is challenging to accommodate three different recognition sites within a small host. Chin and co-workers, by using a chiral Co III complex as the host, showed the chiral interaction between the host and chiral guest in a set of structurally characterised covalently bonded host-guest complexes, but chiral separation was not possible because the interactions were weak due to the open nature of the cavity. [11] In a continuation of our earlier attempts [12] at synthesising a rigid chiral host by using metal complexes, we now present the first report on the synthesis and structural characterisation of a medium-sized chiral metallocavity and its hostguest complexes in which two different chiral amino alcohols were recognised through well-defined three point recognition resulting in chiral separation.We chose amino alcohols [13] as the target guest because of their structural similarity to adrenaline and noradrenaline, a hormone and neurotransmitter, respectively, (Scheme 1) and amino alcohols have two different hydrogen-bonding capable groups. Thus, binding with the host can be enhanced by electrostatic attraction between the cationic ammonium form of the amino alcohol and the use of an anionic host.A schematic representation of the sequence of reactions has been shown in Scheme 2.

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Sodium and Potassium Ion Directed Self-Assembled Multinuclear Assembly of Divalent Nickel or Copper andl-Leucine Derived Ligand

Cited by 35 publications

References 69 publications

Topological insights in polynuclear Ni/Na coordination clusters derived from a schiff base ligand

Topological insights in polynuclear Ni/Na coordination clusters derived from a schiff base ligand

Metal and Ligand Control on Structure and Functions of Ni(Fe)ARD: Role of Supramolecular Structures

Three Point Chiral Recognition and Resolution of Amino Alcohols Through Well‐Defined Interaction Inside a Metallocavity

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