- Tempo-spatial chirogenesis. Limonene-induced mirror symmetry breaking of Si[sbnd]Si bond polymers during aggregation in chiral fluidic media
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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.
- Fujiki, Michiya,Yoshida, Keisuke,Suzuki, Nozomu,Rahim, Nor Azura Abdul,Jalil, Jalilah Abd
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p. 120 - 129
(2016/11/16)
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- Novel Aryl Substituted Silanes Part I: Synthesis and Characterization of Diaryl Silicon Dichlorides
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A series of novel and previously published silicon dichlorides, R2SiCl2 (R = benzyl, fluorenyl, p-tolyl p-n-butyl, p-biphenyl, m-tolyl, o-tolyl, 2,4-xylyl, 2,6-xylyl, p-biphenyl, 1-naphthyl, 9-anthracenyl), were synthesized and chara
- Binder, Judith,Fischer, Roland C.,Flock, Michaela,Torvisco, Ana,Uhlig, Frank
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p. 1980 - 1994
(2015/12/12)
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- Liquid and del-like low molecular weight ethylene polymers
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The subject invention pertains to homogeneous liquid low molecular weight ethylene/alpha-olefin polymers having a number average molecular weight (Mn) as determined by gel permeation chromatography, of less than 25,000, a total crystallinity, as measured
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Page/Page column 13
(2010/02/15)
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