INTRAZEOLITE METAL-CARBONYL PHOTOTOPOTAXY - FROM TUNGSTEN(VI) OXIDE QUANTUM DOTS TO A ZERO-DIMENSIONAL SEMICONDUCTOR QUANTUM SUPRALATTICE

1990-09-01
OZIN, GA
Özkar, Saim

Suggestions

INTRAZEOLITE SEMICONDUCTORS - NA-23 MAS NMR, TL+ LUMINESCENCE QUENCHING, AND FAR-IR STUDIES OF ACID-BASE PRECURSOR CHEMISTRY IN ZEOLITE-Y
MCMURRAY, L; HOLMES, AJ; KUPERMAN, A; OZIN, GA; Özkar, Saim (American Chemical Society (ACS), 1991-11-01)
Proton-loaded zeolites, prepared from fully dehydrated zeolites and gaseous, anhydrous Bronsted acids, represent an important step in the synthesis of intrazeolite semiconductor quantum supralattices. Adsorption-induced Na-23 MAS NMR chemical shifts, far-IR Na+ and Tl+ translatory mode frequency shifts, and Tl+ luminescence quenching effects were chosen as probes of cation-anion interaction in these materials. Samples of zeolite Y with various loadings of Tl+ were prepared via aqueous ion-exchange techniq...
INTRAZEOLITE TOPOTAXY - NA-23 DOUBLE-ROTATION NMR-STUDY OF TRANSITION-METAL HEXACARBONYLS AND OXIDES ENCAPSULATED IN SODIUM ZEOLITE-Y
JELINEK, R; Özkar, Saim; OZIN, GA (American Chemical Society (ACS), 1992-07-01)
Na-23 double-rotation NMR (DOR) provides details on site specific adsorption and anchoring interactions in intrazeolite hexacarbonylmetal(0) complexes, M{M(CO)6}-Na56Y, where M = Mo and W, and their molecular photooxidation products, n{MO3-x}-Na56Y, over the full composition range 0 < m less-than-or-equal-to 16, 0 < n less-than-or-equal-to 32 and 0 less-than-or-equal-to x less-than-or-equal-to 1. The shifts, intensities, and line shapes of the Na-23 DOR resonances carry information on the environments of th...
Dielectric Properties of Ethanol and Gasoline Mixtures by Terahertz Spectroscopy and an Effective Method for Determination of Ethanol Content of Gasoline
ARIK, Enis; Altan, Hakan; Esentürk, Okan (American Chemical Society (ACS), 2014-05-01)
Investigation of frequency dependent permittivity of mixture solutions provides information on the role of intermolecular interactions on relaxation processes of solvent and solute molecules. In this study the dielectric properties of ethanol/gasoline mixtures in the terahertz spectral region are investigated. Frequency dependent absorption coefficients, refractive indices, and complex permittivities of pure ethanol and gasoline, and their mixtures at varying ethanol volume percentages (v/v %) are reported....
INTRAZEOLITE PHOTOTOPOTAXY - EXAFS ANALYSIS OF PRECURSOR 8(W(CO)6)-NA56Y AND PHOTOOXIDATION PRODUCTS 16(WO3)-NA56Y AND 28(WO3)-NA56Y
MOLLER, K; BEIN, T; Özkar, Saim; OZIN, GA (American Chemical Society (ACS), 1991-06-01)
The intrazeolite photooxidation chemistry of alpha-cage encapsulated hexacarbonyltungsten(0) in Na56Y with O2, denoted n{W(CO)6}-Na56Y/O2/hv, which has previously been shown to provide a novel synthetic pathway to alpha-cage located tungsten(VI) oxide, denoted n(WO3)-Na56Y, is now the subject of an extended X-ray absorption fine structure (EXAFS) analysis. The EXAFS data of a precursor 8{W(CO)6}Na56Y, which contains on average one W(CO)6 per alpha-cage shows that the W(CO)6 guest maintains its structural in...
PROTON-LOADED ZEOLITES .3. H56Y, ALPO-5, AND SIO2-Y - ANHYDROUS HX VERSUS AQUEOUS HX TREATMENT OF ZEOLITE-Y
OZIN, GA; Özkar, Saim; MCMURRAY, L (American Chemical Society (ACS), 1990-10-01)
Citation Formats
G. OZIN and S. Özkar, “INTRAZEOLITE METAL-CARBONYL PHOTOTOPOTAXY - FROM TUNGSTEN(VI) OXIDE QUANTUM DOTS TO A ZERO-DIMENSIONAL SEMICONDUCTOR QUANTUM SUPRALATTICE,” JOURNAL OF PHYSICAL CHEMISTRY, pp. 7556–7561, 1990, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/70004.