TY - JOUR
T1 - Probing the titanium sites in Ti-MCM41 by diffuse reflectance and photoluminescence UV-vis spectroscopies
AU - MARCHESE, Leonardo
AU - Maschmeyer, T.
AU - GIANOTTI, Enrica
AU - Coluccia, S.
AU - Thomas, J. M.
PY - 1997
Y1 - 1997
N2 - Ti-MCM41 catalysts prepared by anchoring titanocene onto the inner walls of MCM-41 exhibit high catalytic performance in the epoxidation of cyclohexene and in oxidation of bulky cyclic and aromatic compounds because of the presence, as revealed by means of XANES and EXAFS spectroscopy, of a high concentration of accessible, well-spaced, and structurally well-defined Ti tetrahedral active sites. These results have prompted us to study the nature and the coordinative environment of Ti active sites in MCM-41 also by means of diffuse reflectance UV-visible and luminescence spectroscopy. We revealed, particularly by means of photoluminescence spectroscopy, the presence of more than one kind of tetrahedral titanium site.
AB - Ti-MCM41 catalysts prepared by anchoring titanocene onto the inner walls of MCM-41 exhibit high catalytic performance in the epoxidation of cyclohexene and in oxidation of bulky cyclic and aromatic compounds because of the presence, as revealed by means of XANES and EXAFS spectroscopy, of a high concentration of accessible, well-spaced, and structurally well-defined Ti tetrahedral active sites. These results have prompted us to study the nature and the coordinative environment of Ti active sites in MCM-41 also by means of diffuse reflectance UV-visible and luminescence spectroscopy. We revealed, particularly by means of photoluminescence spectroscopy, the presence of more than one kind of tetrahedral titanium site.
UR - https://iris.uniupo.it/handle/11579/31567
U2 - 10.1021/jp971963w
DO - 10.1021/jp971963w
M3 - Article
SN - 1089-5647
VL - 101
SP - 8836
EP - 8838
JO - JOURNAL OF PHYSICAL CHEMISTRY. B, MATERIALS, SURFACES, INTERFACES, & BIOPHYSICAL
JF - JOURNAL OF PHYSICAL CHEMISTRY. B, MATERIALS, SURFACES, INTERFACES, & BIOPHYSICAL
ER -