Simultaneous manipulation of iron(ii) spin crossover and LIESST behaviour using pressure, temperature and light

Abstract

Spin crossover (SCO) and light-induced excited spin state trapping (LIESST) effects were studied using high pressure X-ray diffraction at cryogenic temperatures on a single crystal of the {[Fe^II(pyrazole)₄]₂[Nb^IV(CN)₈]·4H₂O}_n (FeNb) coordination polymer. The studied compound does not show SCO or LIESST at ambient pressure, but these effects can be enforced by a mechanical stimulus. The obtained results demonstrate the manipulation of the spin state via the appropriate combination of multiple stimuli simultaneously.