Fig. 5: Stereoselective supramolecular copolymerization of two kinds of monomers.
From: Helical supramolecular polymers with rationally designed binding sites for chiral guest recognition
a Obsd.: CD spectrum of a mixture of 1∙2S and 1∙3S in dodecane ([1∙2S] = [1∙3S] = 2.0 mM) after cooling from 348 to 283 K at −1.0 K/min. Calcd.: average of the CD spectra of 1∙2S in dodecane (4.0 mM) and 1∙3S in dodecane (4.0 mM) separately measured at 283 K. b Obsd.: CD spectrum of a mixture of 1∙2S and 1∙3R in dodecane ([1∙2S] = [1∙3R] = 2.0 mM) after cooling from 348 to 283 K at −1.0 K/min. Calcd.: average of the CD spectra of 1•2S in dodecane (4.0 mM) and 1∙3R in dodecane (4.0 mM) separately measured at 283 K. c Cooling curves (from 348 to 283 K at –1.0 K/min, monitored with CD intensity at 354 nm) of a mixture of 1∙2S and 1∙3S in dodecane ([1∙2S] = [1∙3S] = 2.0 mM), 1∙2S in dodecane (4.0 mM), and 1∙3S in dodecane (4.0 mM). d Cooling curves (from 348 to 283 K at −1.0 K/min, monitored with CD intensity at 354 nm) of a mixture of 1∙2S and 1∙3R in dodecane ([1∙2S] = [1∙3R] = 2.0 mM), 1∙2S in dodecane (4.0 mM), and 1∙3R in dodecane (4.0 mM). e, f Schematics for the supramolecular polymerization of the homo-chiral (1∙2S and 1∙3S; e) and hetero-chiral (1∙2S and 1∙3R; f) mixtures. g Obsd.: CD spectrum of an equi-volume mixture of 1∙2S in dodecane (4.0 mM, before mixing) and 1∙3S in dodecane (4.0 mM, before mixing) measured 30 s after mixing at 283 K. Calcd.: average of the CD spectra of 1∙2S in dodecane (4.0 mM) and 1∙3S in dodecane (4.0 mM) separately measured at 283 K. h Differential spectrum between the mixtures of 1∙2S and 1∙3S in a and g. i Schematic for merging of the supramolecular polymers of 1∙2S and 1∙3S.
