Publications by authors named "Ben-Fa Chu"
Inspired by the exquisite helices in Nature, fabrication of helical materials with controlled handedness has attracted considerable attention. Herein, we report on precis synthesis of single left- and right-handed helical polyisocyanides through living polymerization of achiral monomers using chiral palladium catalysts under helix-sense-selective manner. Mechanism study revealed that the yielded helices with opposite handedness showed different activity of the living chain end.
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- A left-handed helical poly(phenyl isocyanide) with norbornene and Pd(II) complex termini was synthesized and cross-linked to form a star polymer with helical arms.
- The resulting star polymer maintained its optical activity and displayed thermoresponsiveness, with a lower critical solution temperature (LCST) around 55 °C.
- It demonstrated the ability to selectively capture the -enantiomer of methyl benzyl alcohol below the LCST while precipitating above that temperature, achieving an enantiomeric excess of up to 75%.