Regiocontrolled synthesis of ethene-bridged para-phenylene oligomers based on Pt(II)- and Ru(II)-catalyzed aromatization.
Chemistry
; 16(6): 1826-33, 2010 Feb 08.
Article
em En
| MEDLINE
| ID: mdl-20029920
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-alkynylbenzene 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.
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Base de dados:
MEDLINE
Assunto principal:
Platina
/
Rutênio
/
Etilenos
/
Luz
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article