Probing the titanium sites in Ti-MCM41 by diffuse reflectance and photoluminescence UV-vis spectroscopies

Leonardo Marchese; Thomas Maschmeyer; Enrica Gianotti; Salvatore Coluccia; John M. Thomas

doi:10.1021/jp971963w

Probing the titanium sites in Ti-MCM41 by diffuse reflectance and photoluminescence UV-vis spectroscopies

Leonardo Marchese, Thomas Maschmeyer, Enrica Gianotti, Salvatore Coluccia, John M. Thomas

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	8836-8838
Number of pages	3
Journal	Journal of Physical Chemistry B
Volume	101
Issue number	44
DOIs	https://doi.org/10.1021/jp971963w
Publication status	Published - 1997
Externally published	Yes

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title = "Probing the titanium sites in Ti-MCM41 by diffuse reflectance and photoluminescence UV-vis spectroscopies",

abstract = "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.",

author = "Leonardo Marchese and Thomas Maschmeyer and Enrica Gianotti and Salvatore Coluccia and Thomas, {John M.}",

year = "1997",

doi = "10.1021/jp971963w",

language = "English",

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journal = "Journal of Physical Chemistry B",

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publisher = "American Chemical Society",

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T1 - Probing the titanium sites in Ti-MCM41 by diffuse reflectance and photoluminescence UV-vis spectroscopies

AU - Marchese, Leonardo

AU - Maschmeyer, Thomas

AU - Gianotti, Enrica

AU - Coluccia, Salvatore

AU - Thomas, John 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.

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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

JF - Journal of Physical Chemistry B

IS - 44

ER -

Probing the titanium sites in Ti-MCM41 by diffuse reflectance and photoluminescence UV-vis spectroscopies

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