Enantioselective adsorption of chiral amines on an induced helical poly(bis(4-carboxyphenoxy)phosphazene): Chiral filter effect
Macromolecules, ISSN: 0024-9297, Vol: 44, Issue: 8, Page: 2457-2464
2011
- 26Citations
- 30Captures
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Article Description
Optically inactive poly((bis(4-carboxyphenoxy)phosphazene) (poly-1) showed a large optical rotation upon complexation with optically active (R)- or (S)-1-phenylethylamine (2) in DMSO after annealing the complex solution at 65 °C for ca. 2 h and maintained its optical activity in the presence of an equimolar amount of the opposite-handed 2. The detailed analysis of the enantiomeric excess of 2 adsorbed on the poly-1 revealed that the helical poly-1 induced by (R)- or (S)-2 most likely acts as a "chiral filter" to exclude one enantiomer from racemic 2, resulting in the retention of its induced helical structure. © 2011 American Chemical Society.
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