Book ChapterDOI
Spectroscopic Characterization of Silicalite and Titanium-Silicalite
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In this article, the surface characterization of silicalite and titanium-silicalite is made by combined use of IR and UV-Vis reflectance spectroscopy, and the nature of the IR modes and of the electronic transitions associated with framework titanium is discussed in detail.Abstract:
Surface characterization of silicalite and titanium-silicalite is made by combined use of IR and UV-Vis reflectance spectroscopy. The nature of the IR modes and of the electronic transitions associated with framework titanium is discussed in detail. The perturbation caused by the adsorption of small polar molecules (H 2 O, NH 3 , CH 3 OH) on both the IR and UV-Vis spectra is discussed in terms of the formation of six-coordinated complexes by ligand insertion in the Ti(IV) coordination sphere. All the Ti(IV) is accessible to the interaction with the molecules.read more
Citations
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Journal ArticleDOI
Novel layered silicate and microporous silica materials in the Na-magadiite–H2O–(TMA)2O system
TL;DR: In this article, a novel layered silicate and microporous silica materials have been successfully synthesized in a Na-magadiite-H2O-(TMA)2O system.
Journal ArticleDOI
Epoxidation of Butadiene Over Nickel Modified TS-1 Catalyst
TL;DR: Nickel modified Titanium silicalite 1 (TS-1) catalysts provided an environmentally benign and effective method for butadiene epoxidation as mentioned in this paper, and the product vinyloxirane (VO) was obtained with high yield of 0.49
Journal ArticleDOI
Synthesis of titanium silicalite-1 using ethyl silicate-40: a new silica source for zeolite synthesis
TL;DR: In this paper, it was observed that if tetrabutyl orthotitanate (TBOT) was mixed with ES-40 before hydrolysis while preparing the reactive solution precursor, the Q3 type of silicate species were predominantly formed, which resulted in faster crystallization of TS-1.
Book ChapterDOI
Factors determining substrate specificity in titanium silicalite catalyzed oxidations
TL;DR: In this paper, the authors investigated the substrate specificity in the oxidations catalyzed by titanium silica-lites TS-1 and TS-2 and revealed that diffusion plays a major role in shape selective oxidation of alkanes.
Journal ArticleDOI
Role and effect of supercritical fluid extraction of template on the Ti(IV) active sites of Ti-MCM-41
M. Chatterjee,H Hayashi,N Saito +2 more
TL;DR: In this paper, the location and coordination of titanium in the calcined and extracted titanosilicate mesoporous molecular sieve was studied by FTIR, UV-Vis spectroscopy, photoluminescence spectra, 29Si NMR, combined with XRD and TG/DTA.
References
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Journal ArticleDOI
Silicalite, a new hydrophobic crystalline silica molecular sieve
Edith M. Flanigen,J. M. Bennett,R. W. Grose,J. P. Cohen,R. L. Patton,Richard M. Kirchner,Joseph V. Smith +6 more
TL;DR: In this article, a new polymorph of SiO2 (silicalite, refractive index 1.39, density 1.76 g cm−3) has been proposed, which encloses a three-dimensional system of intersecting channels defined by 10-rings wide enough to adsorb molecules up to 0.6 nm diameter.
Journal ArticleDOI
Zeolites: Catalysts for Organic Syntheses
TL;DR: The characteristic properties of zeolites, such as acidity, shape-selectivity and thermal stability, also enable them to be used for highly selective synthesis in the fields of chemical intermediates and fine chemicals as mentioned in this paper.
Journal ArticleDOI
Identification of ZSM-type and other 5-ring containing zeolites by i.r. spectroscopy
TL;DR: The mid i.r. spectra have been recorded of the pentasil family, of the mordenite group, of ZSM-39 and Melanophlogite as mentioned in this paper.
Book ChapterDOI
Electron Transfer Spectra
TL;DR: In this paper, it was shown that the Laporte-forbidden bands of transition group complexes can be adapted to the strong Laportes-allowed bands, at least in the octahedral complexes of a central ion with six halide ligands.