Spectroscopic tools for probing the isolated titanium centres in MCM41 mesoporous catalysts

被引：31

作者：

Marchese, L

Gianotti, E

Maschmeyer, T

Martra, G

Coluccia, S

Thomas, JM

机构：

[1] IFM, Dipartimento Chim, I-10125 Turin, Italy

[2] UCL Royal Inst Great Britain, Davy Faraday Res Lab, London W1X 4BS, England

来源：

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS | 1997年 / 19卷 / 11期

关键词：

D O I：

10.1007/BF03185366

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Catalytically active Ti(IV) centres anchored to the inner walls of MCM-41 mesoporous silicas have been investigated using a combination of FT-IR, diffuse reflectance UV-visible and luminescence spectroscopy supplemented by the use of H(2)O and NH(3) as molecular probes of the Ti coordination. The results re-affirm and extend the conclusions reported earlier for the Ti-MCM41 novel epoxidation catalysts, see MASCHMEYER T., REY F., SANKAR G. and THOMAS J. NT., Nature, 378 (1995) 159, who, using in situ EXAFS studies, showed that the Ti(IV) centres exist largely as isolated active sites.

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页码：1707 / 1718

页数：12

相关论文

共 39 条

[1] Titanosilicate mesoporous molecular sieve MCM-41: Synthesis and characterization [J].

Alba, MD ;

Luan, ZH ;

Klinowski, J .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (06) :2178-2182

[2] PHOTOLUMINESCENCE AND PHOTOCATALYTIC ACTIVITY OF HIGHLY DISPERSED TITANIUM-OXIDE ANCHORED ONTO POROUS VYCOR GLASS [J].

ANPO, M ;

AIKAWA, N ;

KUBOKAWA, Y ;

CHE, M ;

LOUIS, C ;

GIAMELLO, E .

JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (23) :5017-5021

[3] SYNTHESIS, CHARACTERIZATION, AND CATALYTIC ACTIVITY OF TI-MCM-41 STRUCTURES [J].

BLASCO, T ;

CORMA, A ;

NAVARRO, MT ;

PARIENTE, JP .

JOURNAL OF CATALYSIS, 1995, 156 (01) :65-74

[4]

Boccuti M.R., 1989, STUD SURF SCI CATAL, P133

[5] XAFS STUDY OF TI-SILICALITE - STRUCTURE OF FRAMEWORK TI(IV) IN THE PRESENCE AND ABSENCE OF REACTIVE MOLECULES (H2O, NH3) AND COMPARISON WITH ULTRAVIOLET-VISIBLE AND IR RESULTS [J].

BORDIGA, S ;

COLUCCIA, S ;

LAMBERTI, C ;

MARCHESE, L ;

ZECCHINA, A ;

BOSCHERINI, F ;

BUFFA, F ;

GENONI, F ;

LEOFANTI, G ;

PETRINI, G ;

VLAIC, G .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (15) :4125-4132

[6] PHYSICOCHEMICAL CHARACTERIZATION OF V-SILICALITE [J].

CENTI, G ;

PERATHONER, S ;

TRIFIRO, F ;

ABOUKAIS, A ;

AISSI, CF ;

GUELTON, M .

JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (06) :2617-2629

[7]

COLUCCIA S, 1989, P INT S AC BAS CAT S

[8]

COLUCCIA S, 1984, P 8 INT C CAT, V3, P69

[9] SYNTHESIS OF AN ULTRALARGE PORE TITANIUM SILICATE ISOMORPHOUS TO MCM-41 AND ITS APPLICATION AS A CATALYST FOR SELECTIVE OXIDATION OF HYDROCARBONS [J].

CORMA, A ;

NAVARRO, MT ;

PARIENTE, JP .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1994, (02) :147-148

[10] Coordination, structure, and vibrational spectra of titanium in silicates and zeolites in comparison with related molecules. An ab initio study [J].

deMan, AJM ;

Sauer, J .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (12) :5025-5034

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