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Potential Building Blocks (potential + building_block)

Distribution by Scientific Domains

Chemistry	50%

Selected Abstracts

ChemInform Abstract: MoV2O2+4 Directs the Formation and Subsequent Linking of Potential Building Blocks under Different Boundary Conditions: A Related Set of Novel Cyclic Polyoxomolybdates.

CHEMINFORM, Issue 47 2001
Achim Mueller
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

To compact ring branch-line coupler using nonuniform transmission line

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 11 2009
F. Hosseini
Abstract A compact ring Branch-Line Coupler (BLC) with size reduction of about 50%(in circuit area) of conventional BLCs at frequency 2 GHz is introduced. The coupler is designed by using nonuniform transmission lines (NTL) instead of Uniform Transmission Lines in each arm. The normalized width w (z)/h function of the NTLs is expanded in a truncated Fourier series. The reduced size couplers are potential building blocks for the growing wireless communication markets. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2679,2682, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24703 [source]

Fabrication and characteristics of SiOx -core nanowires: Comparison study between uncoated and ZnO-coated SiOx nanowires

PHYSICA STATUS SOLIDI (A) APPLICATIONS AND MATERIALS SCIENCE, Issue 8 2008
Hyoun Woo Kim
Abstract We have demonstrated an approach to the synthesis of SiOx -core nanowires, on which ZnO shell layer would be subsequently deposited. We have discussed the possible growth mechanism of SiOx nanowires, in regard to the role of Au catalyst. For a comparison study between uncoated and coated nanowires, samples were characterized by X-ray dif- fraction (XRD), transmission electron microscopy (TEM), and photoluminescence spectroscopy (PL). This method can be applied to a wide range of materials and results in various heterostructures, which may serve as potential building blocks in various nanodevices. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Indium-Mediated Regio- and Diastereoselective Reduction of Norbornyl ,-Diketones

CHEMISTRY - A EUROPEAN JOURNAL, Issue 10 2004
Faiz Ahmed Khan Dr.
Abstract A novel, efficient, and regio- as well as diastereoselective conversion of non-enolizable bicyclic ,-diketones into synthetically useful acyloins mediated by indium metal is described. The reduction is highly diastereoselective, leading exclusively to endo -acyloins (endo -hydroxyl groups) in excellent yields, and tolerates a variety of sensitive substituents, such as acetate, ester, and bridgehead halogens. The regioselectivity in the reductions of monosubstituted ,-diketones varied from 70:30 to 100:0 for the two possible isomeric alcohols. The methodology is extended to the synthesis of highly functionalized cyclopentane carboxaldehydes, potential building blocks in organic syntheses, by cleavage of the acyloins by treating them with Pb(OAc)4 in MeOH/PhH. Allylindium additions to carboxaldehydes 22 have been found to be highly diastereoselective. [source]