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  • Suppression of mesoscopic order by complementary interactions in supramolecular polymers.

Suppression of mesoscopic order by complementary interactions in supramolecular polymers.

Journal of the American Chemical Society (2012-02-11)
Jessalyn Cortese, Corinne Soulié-Ziakovic, Sylvie Tencé-Girault, Ludwik Leibler
ABSTRACT

We show here that complementary interactions can suppress mesoscopic order and thus lead to a counterintuitive change in material properties. We present results for telechelic supramolecular polymers based on poly(propylene oxide) (PPO), thymine (Thy), and diaminotriazine (DAT). The self-complementary systems based on Thy exhibit lamellar order and 2D crystallization of Thy in the bulk. We show that the microphase segregation is inhibited by addition of DAT: the strong complementary Thy-DAT interaction inhibits crystallization of thymine in microdomains and lamellar structuration. As a result, the supramolecular polymer with only weakly self-complementary stickers is a solid, whereas the supramolecular polymer with strongly complementary stickers is a liquid.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Polypropylene glycol, P 2,000
Sigma-Aldrich
Poly(propylene glycol), average Mn ~425
Sigma-Aldrich
Poly(propylene glycol), average Mn ~1,000
Sigma-Aldrich
Poly(propylene glycol), average Mn ~2,000
Sigma-Aldrich
Poly(propylene glycol), average Mn ~725
Sigma-Aldrich
Poly(propylene glycol), average Mn ~4,000
Sigma-Aldrich
Poly(propylene glycol), average Mn ~2,700
Sigma-Aldrich
Polypropylene glycol, P 400