The University of Western Ontario

Joseph A Paquette

Giovanni Fanchini

Sabastine C Ezugwu

Joe B Gilroy

Disclosed herein are redox-active 6-oxoverdazyl polymers having structures (S1) and (S2) synthesized via ring-opening metathesis polymerization (ROMP) and their solution, bulk, and thin-film properties investigated. Detailed studies of the ROMP method employed confirmed that stable radical polymers with controlled molecular weights and narrow molecular weight distributions (&#xd0;&#x3c;1.2) were produced. Thermal gravimetric analysis of a representative example of the title polymers demonstrated stability up to 190&#xb0; C., while differential scanning calorimetry studies revealed a glass transition temperature of 152&#xb0; C. An ultrathin memristor device was produced using these polymers, namely a 10 nm homogeneous thin film of poly-[1,5-diisopropyl-3-(cis-5-norbornene-exo-2,3-dicarboxiimide)-6-oxoverdazyl] (P6OV), a poly-radical with three tunable charge states per each radical monomer: positive, neutral and negative.

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Blind River, Canada

Joseph A Paquette