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A π-gel scaffold for assembling fullerene to photoconducting supramolecular rods.
Science Advances 2016 September
Nonequilibrium self-assembly of molecules holds a huge prospect as a tool for obtaining new-generation materials for future applications. Crystallization of neutral molecules within a supramolecular gel matrix is one example in which two nonequilibrium processes occur orthogonal to each other. On the other hand, electronically interacting donor-acceptor two-component systems are expected to form phase-miscible hybrid systems. Contrary to the expectation, we report the behavior of a π-gel, derived from oligo( p -phenylenevinylene), OPVA, as a scaffold for the phase separation and crystallization of fullerene (C60 ) to supramolecular rods with increased transient photoconductivity (φƩμmax = 2.4 × 10-4 cm2 V-1 s-1 ). The C60 supramolecular rods in the π-gel medium exhibited high photocurrent in comparison to C60 loaded in a non-π-gel medium. This finding provides an opportunity for large-scale preparation of micrometer-sized photoconducting rods of fullerenes for device application.
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