INVESTIGADORES
ASCOLANI Hugo Del Lujan
artículos
Título:
Synthesis, Properties, and Two-Dimensional Adsorption Characteristics of 5-Amino[6]hexahelicene
Autor/es:
MARTEEN VAN DER MEIJDEN; EDITH GELENS; NATALIA MURILLO QUIROS; JAVIER D. FUHR; J. ESTEBAN GAYONE ; HUGO ASCOLANI; KLAUSS WURST; MAGALÍ LINGENFELDER; RICHARD M. KELLOGG
Revista:
CHEMISTRY-A EUROPEAN JOURNAL
Editorial:
WILEY-V C H VERLAG GMBH
Referencias:
Lugar: Weinheim; Año: 2016 vol. 22 p. 1484 - 1492
ISSN:
0947-6539
Resumen:
A convergent synthesis of racemic 5-amino[6]hexahelicene is described. Cross-coupling reactions are used toassemble a pentacyclic framework, and a metal-catalyzed ring-closure comprises the final step. The enantiomers were separated by means of chromatography and the absolute configurations were assigned by comparison of the CD spectra with hexahelicene. The t 1/2 value for racemization at 210 C was approximately 1 hour. Scanning tunneling microscopy (STM) measurements were carried out on enantiopure and racemic samples of aminohelicene on Au(111) under ultrahigh vacuum (UHV) conditions.
