The first circularly polarised light (CPL)-pumped mirror symmetry breaking experiment with achiral fluorene-alt-azobenzene copolymer as polymer particles dispersed in optofluidic organic solvents was demonstrated. CPL-pumped chiroptical generation, racemisation, inversion and retention were effectively achieved by finely tuning the media and the wavelength, pumping time and ellipticity of the CPL. The absolute gCD value was ≈6 × 10−2 for chloroform/n-pentanol and chloroform/i-propanol cosolvents. For comparison, neither the magnetochiral birefringence effect nor CPL-induced chirality in molecular particles of azobenzene was detected under similar conditions.
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Fujiki et al. (2013) studied this question.
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