Morphology of a homologous series of alkylsubstituted pv oligomers

The lack of solubility and fusibility of PPV is a major problem by processing and structure determination. We succeeded in the metathetically preparation and isolation of soluble and meltable oligomers of a homologous series of alkylsubstituted all-trans-PPV. These conjugated products show a lot of interesting characteristics like self-organizing in a layer structure. In this contribution we report about the chain length dependence of this structure on well defined 2,5-diheptyl PV oligomers.