Abstract
Chiral silica nanoparticles (70 nm) grafted with (P)-helicene recognized the molecular shape of double helix and random coil (P)-ethynylhelicene oligomers in solution. A mixture of the (P)-nanoparticles and double helix precipitated much faster than a mixture of the (P)-nanoparticles and random coil, and the precipitate contained only the double helix. The mixture of the (P)-nanoparticles and (P)-ethynylhelicene pentamer reversibly dispersed in trifluoromethylbenzene upon heating at 708C and precipitated upon cooling at 258C. When a 10:90 equilibrium mixture of the double helix and random coil in solution was treated with the (P)-nanoparticles, the double helix was precipitated in 53% yield and was accompanied by equilibrium shift.
Original language | English |
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Pages (from-to) | 1272-1278 |
Number of pages | 7 |
Journal | Chemistry - A European Journal |
Volume | 20 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2014 Jan 27 |
Keywords
- Equilibrium shift
- Helicenes
- Nanoparticles
- Precipitation
- Recognition
ASJC Scopus subject areas
- Catalysis
- Organic Chemistry