8-Hydroxyquinoline

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Makoto Ogawa - One of the best experts on this subject based on the ideXlab platform.

  • in situ complexation of 8 hydroxyquinoline and 4 4 bipyridine with zinc ii in the interlayer space of montmorillonite
    Applied Clay Science, 2014
    Co-Authors: Patcharaporn Pimchan, Nithima Khaorapapong, Minoru Sohmiya, Makoto Ogawa
    Abstract:

    Abstract A series of mixed-ligand zinc complexes was prepared by coordination of 8-Hydroxyquinoline and 4,4′-bipyridine to interlayer zinc(II) ion of montmorillonite through solid–solid reactions at room temperature. The intercalation of the ligands and the in situ formation of the mixed-ligand zinc complexes in the interlayer spaces of montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-Vis and photoluminescence spectroscopies. The intense photoluminescence of zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite hybrids appeared at 503 nm while photoluminescence of zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite hybrids was seen at 511 nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-Hydroxyquinoline) 2 -montmorillonite (506 nm) suggested that the different types and/or microstructure of the mixed-ligand zinc complexes formed in the interlayer spaces of montmorillonite. The photoluminescence intensities of the as-prepared mixed-ligand zinc complexes in montmorillonite decreased in the order of zinc(8-Hydroxyquinoline)(4,4′-bipyridine) 2 -montmorillonite > zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline) 2 -montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite > zinc(8-Hydroxyquinoline)-montmorillonite. The sequence of ligand loading affected the molecular structure and/or packing of the formed complex to control the photoluminescence efficiencies of the hybrids.

  • In situ complexation of 8-Hydroxyquinoline and 4,4′-bipyridine with zinc(II) in the interlayer space of montmorillonite
    Applied Clay Science, 2014
    Co-Authors: Patcharaporn Pimchan, Nithima Khaorapapong, Minoru Sohmiya, Makoto Ogawa
    Abstract:

    Abstract A series of mixed-ligand zinc complexes was prepared by coordination of 8-Hydroxyquinoline and 4,4′-bipyridine to interlayer zinc(II) ion of montmorillonite through solid–solid reactions at room temperature. The intercalation of the ligands and the in situ formation of the mixed-ligand zinc complexes in the interlayer spaces of montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-Vis and photoluminescence spectroscopies. The intense photoluminescence of zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite hybrids appeared at 503 nm while photoluminescence of zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite hybrids was seen at 511 nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-Hydroxyquinoline) 2 -montmorillonite (506 nm) suggested that the different types and/or microstructure of the mixed-ligand zinc complexes formed in the interlayer spaces of montmorillonite. The photoluminescence intensities of the as-prepared mixed-ligand zinc complexes in montmorillonite decreased in the order of zinc(8-Hydroxyquinoline)(4,4′-bipyridine) 2 -montmorillonite > zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline) 2 -montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite > zinc(8-Hydroxyquinoline)-montmorillonite. The sequence of ligand loading affected the molecular structure and/or packing of the formed complex to control the photoluminescence efficiencies of the hybrids.

Patcharaporn Pimchan - One of the best experts on this subject based on the ideXlab platform.

  • in situ complexation of 8 hydroxyquinoline and 4 4 bipyridine with zinc ii in the interlayer space of montmorillonite
    Applied Clay Science, 2014
    Co-Authors: Patcharaporn Pimchan, Nithima Khaorapapong, Minoru Sohmiya, Makoto Ogawa
    Abstract:

    Abstract A series of mixed-ligand zinc complexes was prepared by coordination of 8-Hydroxyquinoline and 4,4′-bipyridine to interlayer zinc(II) ion of montmorillonite through solid–solid reactions at room temperature. The intercalation of the ligands and the in situ formation of the mixed-ligand zinc complexes in the interlayer spaces of montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-Vis and photoluminescence spectroscopies. The intense photoluminescence of zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite hybrids appeared at 503 nm while photoluminescence of zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite hybrids was seen at 511 nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-Hydroxyquinoline) 2 -montmorillonite (506 nm) suggested that the different types and/or microstructure of the mixed-ligand zinc complexes formed in the interlayer spaces of montmorillonite. The photoluminescence intensities of the as-prepared mixed-ligand zinc complexes in montmorillonite decreased in the order of zinc(8-Hydroxyquinoline)(4,4′-bipyridine) 2 -montmorillonite > zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline) 2 -montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite > zinc(8-Hydroxyquinoline)-montmorillonite. The sequence of ligand loading affected the molecular structure and/or packing of the formed complex to control the photoluminescence efficiencies of the hybrids.

  • In situ complexation of 8-Hydroxyquinoline and 4,4′-bipyridine with zinc(II) in the interlayer space of montmorillonite
    Applied Clay Science, 2014
    Co-Authors: Patcharaporn Pimchan, Nithima Khaorapapong, Minoru Sohmiya, Makoto Ogawa
    Abstract:

    Abstract A series of mixed-ligand zinc complexes was prepared by coordination of 8-Hydroxyquinoline and 4,4′-bipyridine to interlayer zinc(II) ion of montmorillonite through solid–solid reactions at room temperature. The intercalation of the ligands and the in situ formation of the mixed-ligand zinc complexes in the interlayer spaces of montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-Vis and photoluminescence spectroscopies. The intense photoluminescence of zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite hybrids appeared at 503 nm while photoluminescence of zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite hybrids was seen at 511 nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-Hydroxyquinoline) 2 -montmorillonite (506 nm) suggested that the different types and/or microstructure of the mixed-ligand zinc complexes formed in the interlayer spaces of montmorillonite. The photoluminescence intensities of the as-prepared mixed-ligand zinc complexes in montmorillonite decreased in the order of zinc(8-Hydroxyquinoline)(4,4′-bipyridine) 2 -montmorillonite > zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline) 2 -montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite > zinc(8-Hydroxyquinoline)-montmorillonite. The sequence of ligand loading affected the molecular structure and/or packing of the formed complex to control the photoluminescence efficiencies of the hybrids.

Nithima Khaorapapong - One of the best experts on this subject based on the ideXlab platform.

  • in situ complexation of 8 hydroxyquinoline and 4 4 bipyridine with zinc ii in the interlayer space of montmorillonite
    Applied Clay Science, 2014
    Co-Authors: Patcharaporn Pimchan, Nithima Khaorapapong, Minoru Sohmiya, Makoto Ogawa
    Abstract:

    Abstract A series of mixed-ligand zinc complexes was prepared by coordination of 8-Hydroxyquinoline and 4,4′-bipyridine to interlayer zinc(II) ion of montmorillonite through solid–solid reactions at room temperature. The intercalation of the ligands and the in situ formation of the mixed-ligand zinc complexes in the interlayer spaces of montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-Vis and photoluminescence spectroscopies. The intense photoluminescence of zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite hybrids appeared at 503 nm while photoluminescence of zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite hybrids was seen at 511 nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-Hydroxyquinoline) 2 -montmorillonite (506 nm) suggested that the different types and/or microstructure of the mixed-ligand zinc complexes formed in the interlayer spaces of montmorillonite. The photoluminescence intensities of the as-prepared mixed-ligand zinc complexes in montmorillonite decreased in the order of zinc(8-Hydroxyquinoline)(4,4′-bipyridine) 2 -montmorillonite > zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline) 2 -montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite > zinc(8-Hydroxyquinoline)-montmorillonite. The sequence of ligand loading affected the molecular structure and/or packing of the formed complex to control the photoluminescence efficiencies of the hybrids.

  • In situ complexation of 8-Hydroxyquinoline and 4,4′-bipyridine with zinc(II) in the interlayer space of montmorillonite
    Applied Clay Science, 2014
    Co-Authors: Patcharaporn Pimchan, Nithima Khaorapapong, Minoru Sohmiya, Makoto Ogawa
    Abstract:

    Abstract A series of mixed-ligand zinc complexes was prepared by coordination of 8-Hydroxyquinoline and 4,4′-bipyridine to interlayer zinc(II) ion of montmorillonite through solid–solid reactions at room temperature. The intercalation of the ligands and the in situ formation of the mixed-ligand zinc complexes in the interlayer spaces of montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-Vis and photoluminescence spectroscopies. The intense photoluminescence of zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite hybrids appeared at 503 nm while photoluminescence of zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite hybrids was seen at 511 nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-Hydroxyquinoline) 2 -montmorillonite (506 nm) suggested that the different types and/or microstructure of the mixed-ligand zinc complexes formed in the interlayer spaces of montmorillonite. The photoluminescence intensities of the as-prepared mixed-ligand zinc complexes in montmorillonite decreased in the order of zinc(8-Hydroxyquinoline)(4,4′-bipyridine) 2 -montmorillonite > zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline) 2 -montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite > zinc(8-Hydroxyquinoline)-montmorillonite. The sequence of ligand loading affected the molecular structure and/or packing of the formed complex to control the photoluminescence efficiencies of the hybrids.

Minoru Sohmiya - One of the best experts on this subject based on the ideXlab platform.

  • in situ complexation of 8 hydroxyquinoline and 4 4 bipyridine with zinc ii in the interlayer space of montmorillonite
    Applied Clay Science, 2014
    Co-Authors: Patcharaporn Pimchan, Nithima Khaorapapong, Minoru Sohmiya, Makoto Ogawa
    Abstract:

    Abstract A series of mixed-ligand zinc complexes was prepared by coordination of 8-Hydroxyquinoline and 4,4′-bipyridine to interlayer zinc(II) ion of montmorillonite through solid–solid reactions at room temperature. The intercalation of the ligands and the in situ formation of the mixed-ligand zinc complexes in the interlayer spaces of montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-Vis and photoluminescence spectroscopies. The intense photoluminescence of zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite hybrids appeared at 503 nm while photoluminescence of zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite hybrids was seen at 511 nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-Hydroxyquinoline) 2 -montmorillonite (506 nm) suggested that the different types and/or microstructure of the mixed-ligand zinc complexes formed in the interlayer spaces of montmorillonite. The photoluminescence intensities of the as-prepared mixed-ligand zinc complexes in montmorillonite decreased in the order of zinc(8-Hydroxyquinoline)(4,4′-bipyridine) 2 -montmorillonite > zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline) 2 -montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite > zinc(8-Hydroxyquinoline)-montmorillonite. The sequence of ligand loading affected the molecular structure and/or packing of the formed complex to control the photoluminescence efficiencies of the hybrids.

  • In situ complexation of 8-Hydroxyquinoline and 4,4′-bipyridine with zinc(II) in the interlayer space of montmorillonite
    Applied Clay Science, 2014
    Co-Authors: Patcharaporn Pimchan, Nithima Khaorapapong, Minoru Sohmiya, Makoto Ogawa
    Abstract:

    Abstract A series of mixed-ligand zinc complexes was prepared by coordination of 8-Hydroxyquinoline and 4,4′-bipyridine to interlayer zinc(II) ion of montmorillonite through solid–solid reactions at room temperature. The intercalation of the ligands and the in situ formation of the mixed-ligand zinc complexes in the interlayer spaces of montmorillonite were confirmed by powder XRD, TG-DTA, as well as FT-IR, UV-Vis and photoluminescence spectroscopies. The intense photoluminescence of zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite hybrids appeared at 503 nm while photoluminescence of zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite hybrids was seen at 511 nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-Hydroxyquinoline) 2 -montmorillonite (506 nm) suggested that the different types and/or microstructure of the mixed-ligand zinc complexes formed in the interlayer spaces of montmorillonite. The photoluminescence intensities of the as-prepared mixed-ligand zinc complexes in montmorillonite decreased in the order of zinc(8-Hydroxyquinoline)(4,4′-bipyridine) 2 -montmorillonite > zinc(8-Hydroxyquinoline)(4,4′-bipyridine)-montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline) 2 -montmorillonite > zinc(4,4′-bipyridine)(8-Hydroxyquinoline)-montmorillonite > zinc(8-Hydroxyquinoline)-montmorillonite. The sequence of ligand loading affected the molecular structure and/or packing of the formed complex to control the photoluminescence efficiencies of the hybrids.

Anuradha Kumar - One of the best experts on this subject based on the ideXlab platform.

  • 8-Hydroxyquinolines are bactericidal against Mycobacterium tuberculosis.
    Drug development research, 2019
    Co-Authors: Joshua Odingo, Julie V. Early, Jake A. Smith, James Johnson, Mai A. Bailey, Megan Files, Junitta Guzman, Juliane Ollinger, Aaron Korkegian, Anuradha Kumar
    Abstract:

    There is an urgent need for new treatments effective against Mycobacterium tuberculosis, the causative agent of tuberculosis. The 8-Hydroxyquinoline series is a privileged scaffold with anticancer, antifungal, and antibacterial activities. We conducted a structure-activity relationship study of the series regarding its antitubercular activity using 26 analogs. The 8-Hydroxyquinolines showed good activity against M. tuberculosis, with minimum inhibitory concentrations (MIC90) of 4 log kill at 10× MIC over 14 days. The majority of the compounds demonstrated cytotoxicity (IC50 of