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C2.04 - Molecularly Engineered Oligoanilines as Model Systems for the Rational Design of Polyaniline 
April 21, 2014   4:45pm - 5:00pm

Molecular engineering is an important tool for developing high-performance electronic materials as small changes in intermolecular interactions can lead to significant variations in solid-state packing and electrical properties. However, it is difficult to explicitly decipher the effect of functionalization due to the paracrystalline nature of most conjugated polymers. Here, single crystals of monodisperse oligoanilines with various aromatic substitutions were synthesized to serve as model systems for elucidating the impact of side-chain functionalization on polyaniline, a benchmark conducting polymer commonly used in organic electrodes and sensors. We found that molecular symmetry is a crucial factor for achieving good solid-state packing, while the nature of the substituents offers control over the packing motif that dictates the efficiency of molecular orbital overlap. The differences in carrier transport properties and electronic structures for these molecules were also investigated. Our findings offer powerful insights to the design rules for engineering a highly efficient polyaniline that can potentially improve the performance of the associated organic electronic devices.

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Keynote Address
Panel Discussion - Different Approaches to Commercializing Materials Research
Business Challenges to Starting a Materials-Based Company
Fred Kavli Distinguished Lectureship in Nanoscience
Application of In-situ X-ray Absorption, Emission and Powder Diffraction Studies in Nanomaterials Research - From the Design of an In-situ Experiment to Data Analysis