Conformational control in a bipyridine linked π-conjugated oligomer: cation mediated helix unfolding and refolding
作者:Kizhumuri P. Divya、Sivaramapanicker Sreejith、Cherumuttathu H. Suresh、Ayyappanpillai Ajayaghosh
DOI:10.1039/c0cc03287e
日期:——
A chiral Ï-conjugated oligomer having alternate bipyridine and carbazole moieties connected through acetylinic bonds undergoes helical folding in chloroformâacetonitrile (40/60, v/v) as evident by fluorescence and circular dichroism changes. In the presence of transition metal cations such as Zn2+ defolding of the helical conformation occurs. Upon decomplexation of the cation with EDTA, the helical conformation is regained.