American Chemical Society
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Carrier Concentration Dependent Conduction in Insulator-Doped Donor/Acceptor Chain Compounds

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journal contribution
posted on 2013-11-27, 00:00 authored by Masaki Nishio, Norihisa Hoshino, Wataru Kosaka, Tomoyuki Akutagawa, Hitoshi Miyasaka
On the basis of the concept that the design of a mixed valence system is a key route to create electronic conducting frameworks, we propose a unique idea to rationally produce mixed valency in an ionic donor/acceptor chain (i.e., D+A chain). The doping of a redox-inert (insulator) dopant (P) into a D+A chain in place of neutral D enables the creation of mixed valency A0/A domains between P units: P–(D+A)nA0–P, where n is directly dependent on the dopant ratio, and charge transfer through the P units leads to electron transport along the framework. This hypothesis was experimentally demonstrated in an ionic DA chain synthesized from a redox-active paddlewheel [Ru2II,II] complex and TCNQ derivative by doping with a redox-inert [Rh2II,II] complex.