Fe(acac)3 has been used as the catalyst in cross-coupling reactions of aryl Grignard reagents with 1,4-bis(2- bromovinyl)benzenes affording bis(2-arylvinyl)benzenes. Effects of alkoxy substituents on both reactants and of the temperature on the reaction outcome are investigated.
Synthesis and zinc(<scp>ii</scp>) complexation modulated fluorescence emission properties of two pyrene-oligo(phenylene vinylene)-2,2′-bipyridine conjugated molecular rods
A series of conjugated rods in which the pyrene chromophore is connected to a 2,2′-bipyridine unit via an oligo(phenylene vinylene) bridge have been synthesized and their photophysical properties in solution investigated. They are shown to display intense visible electronic absorption and fluorescence emission properties. The excited-states characteristics are compared to analogous systems containing
A Synthetic Strategy Leading to Monodisperse PPV Oligomers by Coupling Reactions of Vinyltrimethylsilanes
作者:Francesco Babudri、Gianluca M. Farinola、Linda C. Lopez、Maria G. Martinelli、Francesco Naso
DOI:10.1021/jo001795v
日期:2001.6.1
novel strategy for the synthesis of well-defined oligo(phenylenevinylene)s was developed. The procedure is entirely based upon two coupling processes, both involving vinyltrimethylsilanes. Bis(styryl)benzenes 2a-g bearing two octyloxy groups in the central aromatic ring and various substituents on the external aromatic rings were prepared in good yield by a regio- and stereoselective coupling reaction of