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Issue 23, 2012
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A chiral co-crystalline form of poly(2,6-dimethyl-1,4-phenylene)oxide (PPO)

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For an industrially relevant specialty polymer, poly(2,6-dimethyl-1,4-phenylene)oxide (PPO), for the first time, a crystalline structure is resolved. It is a co-crystalline structure of the polymer with a chiral guest molecule (α-pinene), exhibiting a 2/1 monomer-unit–guest molar ratio. The most relevant feature of this co-crystalline structure is its chirality. In fact, the unit cell includes all left- or right-handed polymer helices and (1S)-(−)- or (1R)-(+)-α-pinene guest molecules, respectively. The induction of non-racemic macromolecular helicity in the co-crystalline structure, clearly confirmed by VCD measurements, leads to amplification of chirality. Guest extraction procedures from the PPO–α-pinene co-crystalline form produce optically inactive nanoporous-crystalline modifications, which present high sorption ability toward organic compounds.

Graphical abstract: A chiral co-crystalline form of poly(2,6-dimethyl-1,4-phenylene)oxide (PPO)

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The article was received on 14 Feb 2012, accepted on 27 Mar 2012 and first published on 29 Mar 2012

Article type: Paper
DOI: 10.1039/C2JM30907F
J. Mater. Chem., 2012,22, 11672-11680

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    A chiral co-crystalline form of poly(2,6-dimethyl-1,4-phenylene)oxide (PPO)

    O. Tarallo, V. Petraccone, C. Daniel, G. Fasano, P. Rizzo and G. Guerra, J. Mater. Chem., 2012, 22, 11672
    DOI: 10.1039/C2JM30907F

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