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- W2914911981 abstract "The left and right helicities of azobenzene (Azo)-containing main-chain polymer (PF8Azo) were successfully controlled with an enantiomeric pair of rigid rod-like helical polysilanes carrying (S)- and (R)-2-methylbutyl groups (PSi-S and PSi-R, respectively) as their hetero-aggregates in a mixture of chloroform and methanol solvents and in the solid state. Optimizing the good and poor cosolvents and their volume fractions showed that the molar ratio of PF8Azo to PSi-S/-R and the molecular weight of PF8Azo were crucial to boost the CD amplitudes of PF8Azo/PSi-S and PF8Azo/PSi-R hetero-aggregates. The photoresponsive trans-cis transformation caused noticeable changes in the sign and magnitude of the chiroptical behavior due to the hetero-aggregates. Moreover, the optically active PF8Azo homo-aggregates were produced by complete photoscissoring reactions at 313 nm, which could be assigned to the Siσ-Siσ* transitions of PSi-S and PSi-R." @default.
- W2914911981 created "2019-02-21" @default.
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- W2914911981 date "2019-01-01" @default.
- W2914911981 modified "2023-10-15" @default.
- W2914911981 title "Aggregation-induced chiroptical generation and photoinduced switching of achiral azobenzene-<i>alt</i>-fluorene copolymer endowed with left- and right-handed helical polysilanes" @default.
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- W2914911981 doi "https://doi.org/10.1039/c8ra09345h" @default.
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