Fig. 6: UC-CPUVL triggered enantioselective photopolymerization.
a Schematic setup of the enantioselective photopolymerization of NA. All of them were kept in the dark. A 445 nm CW semiconductor laser was used as light source. The complexes of R-TP/4CzIPN/5CB ([R-TP]/[4CzIPN] = 30/1, R-TP/5CB is 10 wt%) were sealed in a quartz cell (0.1 cm optical length) refilled with argon. The quartz plate covered with 2, 4-nonadecanediynoic acid spin-coating film was placed behind the sample, with a 445 nm short-pass filter placing between them. b CD spectra of PDA films after exposing to the UC-CPUVL generated from the excited R-TP/4CzIPN (black dash line) and S-TP/4CzIPN (red dash line) in N*LC with incident excitation of the 445 nm CW laser (A 445 nm short-pass was used). c Absorption dissymmetry factor gCD (640 nm) of the obtained chiral PDA in 10 different batches. The black spheres represented the gCD of PDA after exposing to the UC-CPUVL generated from the excited R-TP/4CzIPN/5CB and the red spheres represented the gCD of PDA after exposing to the UC-CPUVL generated from the excited S-TP/4CzIPN/5CB, upon excitation with 445 nm CW laser. At least three irradiation experiments were performed to obtain the average CD signals.
