Abstract
Oligoaza derivatives of biphenyl, terphenyl, quaterphenyl, quinquephenyl, sexiphenyl,
septiphenyl, octiphenyl, noviphenyl, deciphenyl and dodeciphenyl and
poly(pyrimidinylenephenylene) can be synthesized from readily accessible vinamidinium
salts and amidines or N,N,N'-tris(trimethylsilyl)amidines. The fluorescence
of these systems can be tuned over a wide spectral range by varying number and positions
of N atoms. Oligo(diazaphenyls) are thermally and photochemically stable,
are easier to reduce than oligophenyls, can be dissolved at any rate in strong acids
and show strong blue fluorescence in solution as well as in the solid state.
Key words
pyrimidine syntheses - nanostructures - fluorescence - redox properties - X-ray analysis
