TY - JOUR
T1 - Surface-modified imogolite by 3-APS-OsO4 complex
T2 - Synthesis, characterization and its application in the dihydroxylation of olefins
AU - Qi, Xin
AU - Yoon, Hyesun
AU - Lee, Sang Hyeup
AU - Yoon, Juyoung
AU - Kim, Sung Jin
PY - 2008/1
Y1 - 2008/1
N2 - We modified the surface of imogolite nanorods by silylation using 3-aminopropyltriethoxysilane (3-APS) and subsequent attachment of osmium tetroxide (OsO4) onto the amine groups of the silylated imogolite surface. In order to characterize surface-modified imogolite by 3-APS-OsO4 complex, powder X-ray diffraction (powder XRD), Fourier transform infrared (FT-IR) spectroscopy, ultraviolet/visible (UV-vis) spectroscopy and X-ray photoelectron spectroscopy (XPS) experiments were carried out, and we verified the formation of the osmium tetroxide complex on the surface-modified imogolite by 3-APS. As a heterogeneous catalyst, this osmium-bound imogolite (I-APS-OsO4) was applied in the achiral dihydroxylation of olefins, and revealed excellent catalytic activity while leaching of osmium was observed. Introduction of chelating ligands instead of the primary amine group to improve the reusability of the catalyst is currently in progress.
AB - We modified the surface of imogolite nanorods by silylation using 3-aminopropyltriethoxysilane (3-APS) and subsequent attachment of osmium tetroxide (OsO4) onto the amine groups of the silylated imogolite surface. In order to characterize surface-modified imogolite by 3-APS-OsO4 complex, powder X-ray diffraction (powder XRD), Fourier transform infrared (FT-IR) spectroscopy, ultraviolet/visible (UV-vis) spectroscopy and X-ray photoelectron spectroscopy (XPS) experiments were carried out, and we verified the formation of the osmium tetroxide complex on the surface-modified imogolite by 3-APS. As a heterogeneous catalyst, this osmium-bound imogolite (I-APS-OsO4) was applied in the achiral dihydroxylation of olefins, and revealed excellent catalytic activity while leaching of osmium was observed. Introduction of chelating ligands instead of the primary amine group to improve the reusability of the catalyst is currently in progress.
KW - 3-Aminopropyltriethoxysilane (3-APS)
KW - Heterogeneous catalyst
KW - Imogolite nanorod
KW - Osmium-catalyzed dihydroxylation
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=37549048201&partnerID=8YFLogxK
U2 - 10.1016/j.jiec.2007.08.010
DO - 10.1016/j.jiec.2007.08.010
M3 - Article
AN - SCOPUS:37549048201
SN - 1226-086X
VL - 14
SP - 136
EP - 141
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
IS - 1
ER -