TY - JOUR
T1 - In situ complexation of 8-hydroxyquinoline and 4,4'-bipyridine with zinc(II) in the interlayer space of montmorillonite
AU - Pimchan, Patcharaporn
AU - Khaorapapong, Nithima
AU - Sohmiya, Minoru
AU - Ogawa, Makoto
PY - 2014
Y1 - 2014
N2 - 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 503nm while photoluminescence of zinc(4,4'-bipyridine)(8-hydroxyquinoline)-montmorillonite hybrids was seen at 511nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-hydroxyquinoline)2-montmorillonite (506nm) 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.
AB - 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 503nm while photoluminescence of zinc(4,4'-bipyridine)(8-hydroxyquinoline)-montmorillonite hybrids was seen at 511nm. The blue- and red-shifts of the luminescent bands of the hybrids compared with that of zinc(8-hydroxyquinoline)2-montmorillonite (506nm) 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.
KW - 4,4'-Bipyridine
KW - 8-Hydroxyquinoline
KW - Montmorillonite
KW - Solid-solid reaction
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U2 - 10.1016/j.clay.2014.04.033
DO - 10.1016/j.clay.2014.04.033
M3 - Article
AN - SCOPUS:84902086698
SN - 0169-1317
VL - 95
SP - 310
EP - 316
JO - Applied Clay Science
JF - Applied Clay Science
ER -