Multifuntional materials have received a great deal of attention in the quest for miniaturizing electronic devices and increasing their efficiency. The combination of different properties in one material should allow the control of one property through variation of the others. Organic radical conductors and transition metal spin-crossover complexes have been studied extensively vis-à-vis their appealing physical properties combined with high synthetic tunability. Combining these two phenomena within one material might offer a possibility to modulate the electrical conductivity by such external stimuli as temperature or photoexcitation, which are known to cause magnetic state switching in spin-crossover complexes. In this contribution, we show that incorporation of TCNQ<sup>d–·</sup>/DCNQI<sup>d–·</sup> organic radicals with fractional oxidation states into Fe(II) complexes leads to highly conducting hybrid materials that exhibit both temperature- and light-driven spin crossover (TCNQ = 7,7,8,8-tetracyanoquinodimethane; DCNQI = 7,8-dicyanoquinodiimine). The correlations between spin-crossover induced structural changes and transport properties of the materials will be discussed.

Photomagnetic switching in highly conductive Fe(II) spin-crossover complexes with organic radicals

249th National Meeting (2015)

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