Title: Regiocontrolled Synthesis of Ethene-Bridged para-Phenylene Oligomers Based on Pt(II)- and Ru(II)-Catalyzed Aromatization
Authors: Chen, Tse-An
Lee, Te-Ju
Lin, Ming-Yuan
Sohel, Shariar M. A.
Dian, Eric Wei-Guang
Lush, Shie-Fu
Liu, Rai-Shung
Department of Applied Chemistry
Issue Date: 1-Jan-2010
Abstract: We report the regiocontrolled syntheses of ethene-bridged para-phenylene oligomers in three distinct classes by using Pt(II)- and Ru(II)-catalyzed aromatization. This synthetic approach has been developed based on twofold aromatization of the 1-aryl-2-alkynyl-benzene functionality, which proceeds by distinct regioselectivity for platinum and ruthenium catalysts. Variable-temperature NMR spectra provide evidence that large arrays of these oligomers are prone to twist from planarity. The UV/Vis and photoluminescence (PL) spectra as well as the band gaps of these regularly growing arrays show a pattern of extensive pi conjugation with increasing array sizes, except for in one instance.
URI: http://dx.doi.org/10.1002/chem.200902231
ISSN: 0947-6539
DOI: 10.1002/chem.200902231
Volume: 16
Issue: 6
Begin Page: 1826
End Page: 1833
Appears in Collections:Articles