High-temperature photo-induced switching and pressure-induced transition in a cooperative molecular spin-crossover material.

نویسندگان

  • Gavin A Craig
  • Jose Sánchez Costa
  • Olivier Roubeau
  • Simon J Teat
  • Helena J Shepherd
  • Manuel Lopes
  • Gábor Molnár
  • Azzedine Bousseksou
  • Guillem Aromí
چکیده

The thermal and photo-induced switching properties of the recently published molecular spin crossover complex [Fe(H4L)2](ClO4)2·H2O·2(CH3)2CO () have been investigated in detail through Raman spectroscopy. Magnetometric and single crystal X-ray diffraction kinetic studies within the hysteresis loop have proven its metastable character, which allowed establishing the shape of the true, quasi-static hysteresis loop. This is related to the proximity of the temperatures of the thermal high to low spin SCO (T1/2↓) to those of the relaxation of the thermally or photo-generated metastable states (T(TIESST) and T(LIESST), respectively). Green light irradiation within the hysteresis loop results in a complete low to high spin photo-switch. In addition, the SCO of at room temperature can be induced by applying pressure, as followed by Raman spectroscopy.

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عنوان ژورنال:
  • Dalton transactions

دوره 43 2  شماره 

صفحات  -

تاریخ انتشار 2014