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

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

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The thermal and photo-induced switching properties of the recently published molecular spin crossover complex [Fe(H4L)2](ClO4)2·H2O·2(CH3)2CO (1) 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 1 at room temperature can be induced by applying pressure, as followed by Raman spectroscopy.
Original languageEnglish
Pages (from-to)729-737
Number of pages9
JournalDalton Transactions
Volume43
Issue number2
DOIs
Publication statusPublished - 3 Oct 2013

Keywords

  • photo-induced switching
  • pressure-induced transition
  • molecular spin crossover complex

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