Coordination chemistry of Cu(II), Co(II), Zn(II) and Ag(I) complexes of isomeric pyridine 2- and 4-carboxamides and their biological activity evaluation

Lumb, Isha; Sran, Balkaran Singh; Sood, Henna; Arora, Daljit Singh; Hundal, Geeta

doi:10.1016/j.poly.2017.01.063

Cited by 10 publications

(6 citation statements)

References 66 publications

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“…IR spectroscopy: Compound 1 shows a strong band at 1595 cm -1 which describes that amide oxygen is participating in coordination. [54][55] Presence of broad band for ν OH at 3400 cm -1 in 1…”

Section: Resultsmentioning

confidence: 99%

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Field-Induced Single Molecular Magnetism and Photoluminescence in Rare Cocrystals of Isomorphic Lanthanide(III) Coordination Compounds with Fully Substituted Pyridine-4-carboxamide Ligand

et al. 2020

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A series of four isomorphous, 1:2 (Complex :L) rare cocrystals of coordination compounds of Ln(III) ions as [Ln(L)(NO 3 ) 3 (H 2 O)] 2 [L] 2 (Ln(III) = Gd (1), Tb (2), Dy (3) and Ho (4)), were synthesized with N, N-diisobutylisonicotinamide (L) using metal-to-ligand ratio of 1:1. All compounds are dimeric in nature with two co-crystallised L molecules centro-symmetrically interspersed between two dimeric units with H bonded bridges between them to form interesting, self-assembled H-bonded tapes along the c axis. Detailed Shape analysis and Hirshfeld analysis are done to demonstrate geometry around the metal centres and various non-covalent interactions present in the systems, respectively. Magnetic studies show that compound 3 is a field-induced Single-Molecule Magnet (SMM) for which the magnetization relaxes through a combination of Orbach ( = 51 K and  0 = 3.1 x10 -7 s) and Raman mechanisms. Solid state luminescence studies reveal that compounds 1, 2 and 3 are photoluminescent in the visible range while 4 exhibits luminescence in the NIR region. Compound 3 shows cold white light emission with CIE (International Commission on Illumination) coordinates (0.31, 0.30

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Section: Resultsmentioning

confidence: 99%

“…Compound 1 shows a strong band at 1595 cm –1 which indicates that the amide oxygen is participating in coordination. , The presence of a broad band for ν OH at 3400 cm –1 in 1 shows coordinating water. The ν C–N (amide) and ν C–H stretching bands are assigned to 1476 and 2979, cm –1 for 1 .…”

Section: Resultsmentioning

confidence: 99%

Field-Induced Single Molecular Magnetism and Photoluminescence in Rare Cocrystals of Isomorphic Lanthanide(III) Coordination Compounds with Fully Substituted Pyridine-4-carboxamide Ligand

et al. 2020

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“…While the one-pot approach worked well for Ni(II) and Cu(I), generalizing this strategy to other metal cations was challenging due to the precipitation of insoluble PyCHO-containing metal species. , In an effort to expand our metalation catalog, we returned to the stepwise route. Initial attempts to form iminopyridine species in the absence of Lewis acidic transition metal salts yielded poor conversion to the imine (e.g., <50% yield after 7 days) .…”

Section: Resultsmentioning

confidence: 99%

Modular Synthesis of Templated Bimetallic Sites in Metal–Organic Framework Pores

Geary,

Aalto,

Xiao

2024

Chem. Mater.

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Binuclear metal active sites are found throughout all subfields of catalysis, from homogeneous and heterogeneous systems to enzymes. Here, we report a synthetic route to install well-defined bimetallic sites in metal−organic frameworks that offer independent control over the ligand environment, metal identity, metal−metal distance, and pore environment. Our approach uses thermolabile tertiary carbamate cross-linkers to template pairs of amine functional groups within framework pores. The templated amine pairs can be quantitatively converted into diverse chelating sites, such as iminopyridine and bis(2pyridylmethyl)amine ligands, and metalated with a variety of metal cations [M = Mn(II), Fe(II), Co(II), Ni(II), Cu(I), and Cu(II)]. A combination of density functional theory, extended X-ray absorption fine structure spectroscopy, and electron paramagnetic resonance spectroscopy is used to confirm the local coordination environment and support the proximal nature of the templated bimetallic sites. The templating strategy described here will enable the exploration of new bimetallic motifs in heterogeneous catalysis.

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“…While the one-pot approach worked well for Ni(II) and Cu(I), generalizing this strategy to other metal cations was challenging due to the precipitation of insoluble PyCHO-containing metal species. 38,39 In an effort to expand our metalation catalogue, we returned to the stepwise route. Initial attempts to form iminopyridine species in the absence of Lewis acidic transition metal salts yielded poor conversion to the imine (e.g., <50% yield after 7 days).…”

Section: Postsynthetic Imine Formation and Metalationmentioning

confidence: 99%

Modular Synthesis of Templated Bimetallic Sites in Metal–Organic Framework Pores

Geary,

Aalto,

Xiao

2023

Preprint

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Binuclear metal active sites are found throughout all subfields of catalysis, from homogeneous and heterogeneous systems to enzymes. Here, we report a synthetic route to install well-defined bimetallic sites in metal–organic frameworks that offers independent control over the ligand environment, metal identity, metal–metal distance, active site flexibility, and pore environment. Our approach uses thermolabile tertiary carbamate crosslinkers to template pairs of amine functional groups within framework pores. The templated amine pairs can be quantitatively converted into diverse chelating sites, such as iminopyridine and bis(2-pyridylmethyl)amine ligands, and metalated with a variety of metal cations (M = Mn(II), Fe(II), Co(II), Ni(II), Cu(I), and Cu(II)). A combination of density functional theory, extended X-ray absorption fine structure spectroscopy, and electron paramagnetic resonance spectroscopy is used to confirm the local coordination environment and support the proximal nature of the templated bimetallic sites. The templating strategy described here will enable the exploration of new bimetallic motifs in heterogeneous catalysis.

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Coordination chemistry of Cu(II), Co(II), Zn(II) and Ag(I) complexes of isomeric pyridine 2- and 4-carboxamides and their biological activity evaluation

Cited by 10 publications

References 66 publications

Field-Induced Single Molecular Magnetism and Photoluminescence in Rare Cocrystals of Isomorphic Lanthanide(III) Coordination Compounds with Fully Substituted Pyridine-4-carboxamide Ligand

Field-Induced Single Molecular Magnetism and Photoluminescence in Rare Cocrystals of Isomorphic Lanthanide(III) Coordination Compounds with Fully Substituted Pyridine-4-carboxamide Ligand

Modular Synthesis of Templated Bimetallic Sites in Metal–Organic Framework Pores

Modular Synthesis of Templated Bimetallic Sites in Metal–Organic Framework Pores

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