Single- and double-layered organically modified nanosheets by selective interlayer grafting and exfoliation of layered potassium hexaniobate.
Organically modified niobate nanosheets are promising building blocks for the design of advanced hybrid materials. Nanosheets with controlled thickness and surface composition are important for precise structural design of the nanosheet-based materials. In this work, single-layered and double-layered niobate nanosheets functionalized by phenylphosphonate moieties were selectively prepared by interlayer grafting of A-type and B-type intercalation derivatives of potassium hexaniobate (K4Nb6O17·3H2O) with phenylphosphonic acid (PPA), followed by exfoliation by ultrasonication in acetonitrile. The interlayer grafting of PPA was monitored using X-ray diffraction (XRD), Fourier transform infrared (FTIR), and solid-state NMR spectroscopy, and the thicknesses of the exfoliated nanosheets were measured by atomic force microscopy (AFM). Transparent hybrid films were obtained by incorporating the single- and double-layered nanosheets into an epoxy matrix.
Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University , 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan.
Nanako
N
Kimura
Yumi
Y
Kato
Ryoko
R
Suzuki
Akira
A
Shimada
Seiichi
S
Tahara
Teruyuki
T
Nakato
Kimihiro
K
Matsukawa
P Hubert
PH
Mutin
Yoshiyuki
Y
Sugahara
D000097:Acetonitriles; D018625:Microscopy, Atomic Force; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D009556:Niobium / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry*; D013010:Sonication; D017550:Spectroscopy, Fourier Transform Infrared
D000097:Acetonitriles; D009943:Organophosphorus Compounds; D017680:Potassium Compounds; D009556:Niobium; C023604:phenylphosphonic acid; C032159:acetonitrile