Improved synthesis of 4-bromo-2,2 '-bipyridine: a start material for low-molecular-weight model compounds

Authors
Egbe, DAM Amer, AM Klemm, E
Citation
Dam. Egbe et al., Improved synthesis of 4-bromo-2,2 '-bipyridine: a start material for low-molecular-weight model compounds, DES MON POL, 4(2), 2001, pp. 169-175
Citations number
11
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
DESIGNED MONOMERS AND POLYMERS
ISSN journal
1385772X → ACNP
Volume
4
Issue
2
Year of publication
2001
Pages
169 - 175
Database
ISI
SICI code
1385-772X(2001)4:2<169:ISO4'A>2.0.ZU;2-R
Abstract
An improved and simplified synthetic method for 4-bromo-2,2 ' -bipyridine ( 5) has opened a way to the synthesis of the model compounds 8a, b of polyme r 9. 8a, b confirmed the effective conjugation segment of polymer 9 to cons ist of an alternation of three aryl and two ethynyl units (Ar-C dropC-Ar-C dropC-Ar) due to the zig-zag structure of the polymer. It was found to be t he smallest conjugated unit necessary to obtain excellent fluorescence.