Abstract
Herein, we designed photoluminescent polymer aggregates surrounded by organic media containing (S)-/(R)-limonene and (1S)-/(1R)-α-pinene as an artificial model of an open-flow cell-wall free coacervate in a fluidic medium in the ground and photoexcited states. The aggregates were build-up of stiff circular dichroism (CD)-silent and circularly polarized luminescence (CPL)-silent bis(p-n-butylphenyl)polysilanes, nBuPS, and four other diarylpolysilanes. (S)- and (R)-limonene induced more efficiently to their chirality to nBuPS during aggregation, as proven by CD and CPL spectral analysis, compared to (1S)- and (1R)-α-pinene. The nBuPS aggregates generated in a mixture of limonene, methanol, and chloroform had a dissymmetry factor (gabs) as high as +0.04 for (R)-limonene and −0.03 for (S)-limonene at the first Cotton band and a weak dissymmetry factor (glum) of +0.004 for (R)-limonene and −0.003 for (S)-limonene. The gabs factor, however, greatly depended on the volume fraction and chirality of limonene in the tersolvents. These behaviors were ascribed to the tempo-spatial stability and instability of the aggregates suspension in the fluidic media, as revealed by time-course dynamic light scattering measurement.
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