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CD Mea su r em en ts. The concentration of 2, which was
calculated on the basis of monomeric units, was 2.1 mmol L-1
for all measurements. The molar ratio of the chiral guest and
the monomeric units in 2 was 30 except for the titration
experiment in Figure 7. A typical procedure is described below;
A stock solution of 2 (4.2 mmol L-1) in chloroform/acetonitrile
(1/1, v/v) was prepared in a 5 mL flask, and a 1 mL aliquot of
the solution was transferred to a 2 mL flask. L-Pgly‚HClO4
(31.7 mg, 0.126 mmol) was added to the 2 mL flask. The
solution was then diluted with chloroform/acetonitrile (1/1, v/v)
to 2 mL and was vigorously shaken. After 10 min, the CD and
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spectropolarimeter with a thermostat.
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Su p p or tin g In for m a tion Ava ila ble: Table showing ex-
traction yields (%) of alkali-metal picrates by polymer 2 along
with that by polymer 3 and figures showing CD and UV
spectra of 2 in the presence of various perchloric acid salts of
amino acids, CD spectra of 2 with L-Pgly‚HClO4 for the
titration experiment, CD and UV spectra of 2 with L-Pgly‚
HClO4 in chloroform/methanol (1/1, v/v), acetonitrile/methanol
(2/1, v/v), acetonitrile, and chloroform/acetonitrile (1/1, v/v),
and temperature dependence for the CD spectra of 2 in the
presence of L-Pgly‚HClO4 in chloroform/acetonitrile (1/1, v/v).
This material is available free of charge via the Internet at
http://pubs.acs.org.
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