Journal
SENSORS
Volume 15, Issue 2, Pages 2388-2398Publisher
MDPI
DOI: 10.3390/s150202388
Keywords
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Funding
- Fonds National de la Recherche Scientifique (FNRS) [FRFC 2.4537.12]
- Romanian National Authority for Scientific Research
- CNCS-UEFISCDI [PN-II-RU-TE-2011-3-0307]
- Romanian Academy-WBI
- WBI-UEFISCDI [587/07.09.2012]
- WBI-Tournesol
- Walloon region (MEMLINK)
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We have investigated the suitability of using the 1D spin crossover coordination polymer [Fe(4-(2 '-hydroxyethyl)-1,2,4-triazole)(3)]I-2 center dot H2O, known to crossover around room temperature, as a pressure sensor via optical detection using various contact pressures up to 250 MPa. A dramatic persistent colour change is observed. The experimental data, obtained by calorimetric and Mossbauer measurements, have been used for a theoretical analysis, in the framework of the Ising-like model, of the thermal and pressure induced spin state switching. The pressure (P)-temperature (T) phase diagram calculated for this compound has been used to obtain the P-T bistability region.
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