352
Y. Morisaki
Fig. 10.8 Synthesis of optically active polymer
Fig. 10.9 CPL and PL
spectra of (R p )- and (S p )-19
in CHCl 3 (10 × 10 −5 M)
excited at 290 nm for CPL
and λ abs,max for PL
CD spectra of the optically active oligomers, and the |g lum | values at λ PL,max calculated from CPL spectra. The |g abs | values of 20–22 were substantially constant at 3.0
× 10
−3 , regardless of the number of stacked π-electron systems. Linearly π-stacked
structures of 20–22 in the ground state can adopt various conformations in dilute
solution, leading to the constant g abs values. In other words, the constant g abs values
reflect only the chirality of optically active V-shaped skeleton of the cyclophane
moiety. A g abs value is a normalized value; therefore, the g abs values of 20–22 were
constant independent of the number of stacked π-electron systems.
Y. Morisaki
Fig. 10.8 Synthesis of optically active polymer
Fig. 10.9 CPL and PL
spectra of (R p )- and (S p )-19
in CHCl 3 (10 × 10 −5 M)
excited at 290 nm for CPL
and λ abs,max for PL
CD spectra of the optically active oligomers, and the |g lum | values at λ PL,max calculated from CPL spectra. The |g abs | values of 20–22 were substantially constant at 3.0
× 10
−3 , regardless of the number of stacked π-electron systems. Linearly π-stacked
structures of 20–22 in the ground state can adopt various conformations in dilute
solution, leading to the constant g abs values. In other words, the constant g abs values
reflect only the chirality of optically active V-shaped skeleton of the cyclophane
moiety. A g abs value is a normalized value; therefore, the g abs values of 20–22 were
constant independent of the number of stacked π-electron systems.