C2 symmetrical double chromophores: cooperativity effects in lanthanide ion complexation.
We describe the synthesis and characterization of C(2) symmetrical double chromophores, in which two identical chromophores are linked through ethylene glycol spacers of increasing lengths. The complexation ability of the trans stereopure form for each diastereoisomeric pair showed how the two chromophores, when the spacer unit is comprised of a diethylene or a triethylene glycol moiety, are able to interact in a positive way, stabilizing the resulting complexes when compared with single chromophore analogous compounds.
Pasini
Dario
D
Department of Organic Chemistry, University of Pavia, Viale Taramelli, 10, 27100 Pavia, Italy. dario.pasini@unipv.it
Righetti
Pier Paolo
PP
Zema
Michele
M