Jp. Bolender et al., CHIRALITY-DEPENDENT INTERMOLECULAR INTERACTIONS PROBED BY TIME-RESOLVED CHIROPTICAL LUMINESCENCE MEASUREMENTS OF ENANTIO-DIFFERENTIAL EXCITED-STATE QUENCHING KINETICS, Chemical physics letters, 213(1-2), 1993, pp. 131-138
Time-resolved chiroptical luminescence (TR-CL) spectroscopy is used to
measure the chirality dependence of dynamic excited-state quenching p
rocesses in solution. Measurements are performed on a series of lumino
phore-quencher systems in which the interacting molecular species have
similar overall shapes and sizes, but differ with respect to one or m
ore well-defined (and incrementally varied) elements of structural chi
rality. The measurements yield rate constants for competing enantiospe
cific quenching processes, and the relative values of these rate const
ants provide information about both the degree and sense (handedness)
of chiral discriminatory interactions between the luminophore and quen
cher species. It is shown that both the degree and sense of chiral rec
ognition/discrimination in the quenching processes are modulated by sm
all changes in quencher structure.