Complexation of metals with piperazine-containing azamacrocyclic fluorophores.
Azamacrocyclic fluorophores containing piperazine units were synthesized using sequential rhodium-catalyzed regioselective hydroformylation-reductive amination. A piperazine unit is introduced into the macrocycles to act simultaneously as electron donor and binding site. The macrocycles chelate divalent cations, either Zn2+ or Co2+, which considerably enhanced fluorescence. Complexation with Zn2+ was additionally confirmed by NMR.
FB Chemie-Organische Chemie-NMR-Spektroskopie, Universität Dortmund, Otto-Hahn-Str. 6, D-44227 Dortmund, Germany.
Goran
G
Angelovski
Burkhard
B
Costisella
Branko
B
Kolarić
Martin
M
Engelhard
Peter
P
Eilbracht