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INTRAZEOLITE METAL-CARBONYL PHOTOTOPOTAXY - FROM TUNGSTEN(VI) OXIDE QUANTUM DOTS TO AN EXPANDED SEMICONDUCTOR QUANTUM SUPERLATTICE
Date
1990-04-01
Author
OZIN, GA
Özkar, Saim
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https://hdl.handle.net/11511/69989
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ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
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Department of Chemistry, Article
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INTRAZEOLITE METAL-CARBONYL PHOTOTOPOTAXY - FROM TUNGSTEN(VI) OXIDE QUANTUM DOTS TO A ZERO-DIMENSIONAL SEMICONDUCTOR QUANTUM SUPRALATTICE
OZIN, GA; Özkar, Saim (American Chemical Society (ACS), 1990-09-01)
INTRAZEOLITE SEMICONDUCTOR QUANTUM DOTS AND QUANTUM SUPRALATTICES - NEW MATERIALS FOR NONLINEAR OPTICAL APPLICATIONS
OZIN, GA; KIRKBY, S; MESZAROS, M; Özkar, Saim; STEIN, A; STUCKY, GD (1991-01-01)
Recent developments in host-guest inclusion chemistry have paved the way to the controlled and reproducible assembly of sodalite and faujasite quantum dots and supralattices, the latter being comprised of regular arrays of monodispersed semiconductor (eg. AgX, WO3) quantum dots confined in a dielectric material. This work has led to the synthesis of the first examples of mixed component semiconductor quantum supralattices represented by the new sodalite family of materials (8-2n)Na,2nAg,(2-p)X,pY-SOD. Colle...
Intrazeolite cobalt(0) nanoclusters as low-cost and reusable catalyst for hydrogen generation from the hydrolysis of sodium borohydride
Rakap, Murat; Özkar, Saim (Elsevier BV, 2009-09-07)
Intrazeolite cobalt(0) nanoclusters were prepared by ion-exchange of Co2+ ions with the extraframework Na+ ions in the zeolite-Y followed by the reduction of Co2+ ions in the supercages of zeolite-Y with sodium borohydride at room temperature. The intrazeolite cobalt(0) nanoclusters were isolated as solid materials and characterized by ICP-OES, XRD, HRTEM, SEM, XPS, Raman spectroscopy and N-2 adsorption technique. The catalytic activities of intrazeolite cobalt(0) nanoclusters in the hydrolysis reaction of ...
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...
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G. OZIN and S. Özkar, “INTRAZEOLITE METAL-CARBONYL PHOTOTOPOTAXY - FROM TUNGSTEN(VI) OXIDE QUANTUM DOTS TO AN EXPANDED SEMICONDUCTOR QUANTUM SUPERLATTICE,”
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
, pp. 160–159, 1990, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/69989.