Chiroptical features and luminescence behaviour of macrocyclic tetra(4-quinolyl)-complexes: surprising absence of exciton coupling
作者:Linda J. Govenlock、Judith A. K. Howard、Janet M. Moloney、David Parker、Robert D. Peacock、Giuliano Siligardi
DOI:10.1039/a905512f
日期:——
The C4-symmetric (S)-tetra(4-quinolyl) tetraamide derivative of dota has been prepared. The sodium complex has been characterised by X-ray crystallography and although the quinolyl groups are appropriately oriented for exciton coupling in the solid-state, in solution no evidence for coupling was found for the free ligand nor its protonated, Na, Ca or Eu complexes. Instead, excimer formation was observed in emission consistent with a coplanar arrangement of the quinolyl groups.
制备了dota的C4-对称(S)-四(4-喹啉基)四酰胺衍生物。钠配合物已通过 X 射线晶体学进行了表征,尽管喹啉基在固态下适合激子耦合,但在溶液中,没有发现游离配体及其质子化的 Na、Ca 或 Eu 配合物的耦合证据。相反,在与喹啉基团的共面排列一致的发射中观察到准分子形成。