47 research outputs found
Iodoarene-Catalyzed Cyclizations of Unsaturated Amides
The cyclization of N-alkenylamides catalyzed by iodoarenes under oxidative conditions is presented. Five-, six-, and seven-membered rings with a range of substitutions can be prepared by this route. Preliminary data from the use of chiral iodoarenes as precatalysts show that enantiocontrol is feasible
Laser treatment of Ag@ZnO nanorods as long-life-span SERS surfaces.
This is the accepted manuscript. The final version is available from ACS at http://pubs.acs.org/doi/abs/10.1021/am506622x.UV nanosecond laser pulses have been used to produce a unique surface nanostructuration of Ag@ZnO supported nanorods (NRs). The NRs were fabricated by plasma enhanced chemical vapor deposition (PECVD) at low temperature applying a silver layer as promoter. The irradiation of these structures with single nanosecond pulses of an ArF laser produces the melting and reshaping of the end of the NRs that aggregate in the form of bundles terminated by melted ZnO spherical particles. Well-defined silver nanoparticles (NPs), formed by phase separation at the surface of these melted ZnO particles, give rise to a broad plasmonic response consistent with their anisotropic shape. Surface enhanced Raman scattering (SERS) in the as-prepared Ag@ZnO NRs arrays was proved by using a Rhodamine 6G (Rh6G) chromophore as standard analyte. The surface modifications induced by laser treatment improve the stability of this system as SERS substrate while preserving its activity.We thank the Junta de AndalucĂa (TEP8067, FQM-6900 and P12-FQM-2265) and the Spanish
Ministry of Economy and Competitiveness (Projects CONSOLIDER-CSD 2008-00023,
MAT2011-28345-C02-02, MAT2013-40852-R, MAT2013-42900-P and RECUPERA 2020) for
financial support. The authors also thank the European Union Seventh Framework Programme
under Grant Agreements 312483-ESTEEM2 (Integrated Infrastructure Initiative-I3) and
REGPOT-CT-2011-285895-Al-NANOFUNC, and the European Research Council under the
European Union’s Seventh Framework Programme (FP/2007-2013)/ERC grant agreement
291522 - 3DIMAGE. R. J. Peláez acknowledges the grant JCI-2012_13034 from the Juan de la
Cierva program
Kiri antara Islam modernisme dan postmodernisme : telaah kritios atas pemikiran Hassan Hanif
Judul asli : Between modernity and postmodernity the Islamic liftand Dr. Hassan Hanif's though: acritical readingx, 149 p.; 20 cm