AI Article Synopsis
- Researchers have developed a method to create chiral polyaniline nanohelices (PANI NHs) with adjustable screw pitches and tilt angles by varying the amount of -camphorsulfonic acid, which acts as a chiral molecule inducer.
- These chiral nanohelices maintain a similar aspect ratio while allowing for a continuous range of chiral shapes, bridging the gap between discrete and tunable nanostructures.
- The study also reveals that PANI NHs enhanced with gold nanoparticles show improved catalytic performance in reactions, with greater helical twist correlating to higher activity and selectivity.
Article Abstract
Left- and right-handed chiral molecule inducers have been frequently used to guide the formation of chiral nanomaterials with binary chiral shapes. However, the transition of chiral nanomaterials from discrete to continuously tunable chiral shapes is imperative but challenging and will contribute to a deep understanding of the fundamental relations between chiral nanostructures and their chemical properties. This study shows that chiral polyaniline nanohelices (PANI NHs) with similar aspect ratios (∼5.0) but continuously tunable screw pitches (293 to ∞ nm) and tilt angles (33° to 0°) can be fabricated by adjusting the enantiomer excess of -camphorsulfonic acid used as a chiral molecule inducer. After Au nanoparticles were loaded on the surface of chiral PANI NHs, the chiral morphology-dependent catalytic performances of PANI-Au NHs are studied in reduction, oxidation, and enantioselective catalytic reactions, showing that the larger the helical twist degree, the higher the catalytic activity and enantioselectivity of PANI-Au NHs.
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| http://dx.doi.org/10.1021/acs.nanolett.4c04816 | DOI Listing |
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